Carrier Chillers 30GB040 - 30GT225-280 Error Code

Display = 51
Description Of Failure
30GB
= Compressor
040 to 60 = 1
070 = 1
075 to 100 = 1
110 to 150 = 1
175-200 = 1
30GT
225 to 280 = A1 Failure
ACTION TAKE BY CONTROL = Circuit 1 or Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = High-Pressure Swicth Trip or High Discharge gas temperature swicth Trip, or Compressor ground current >2 5 amp or Compressor board relay on.
When it is not supposed to be on, wiring error between electronic control and Compressor protection module.


Display = 52
Description Of Failure
30GB
= Compressor
040 to 60 =
070 = 2
075 to 100 = 2
110 to 150 = 2
175-200 = 2
30GT
225 to 280 = A2 Failure
ACTION TAKE BY CONTROL = Compressor Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = High-Pressure Swicth Trip or High Discharge gas temperature swicth Trip, or Compressor ground current >2 5 amp or Compressor board relay on.
When it is not supposed to be on, wiring error between electronic control and Compressor protection module

Display = 53
Description Of Failure
30GB
= Compressor
040 to 60 =
070 =
075 to 100 =
110 to 150 = 3
175-200 = 3
30GT
225 to 280 = A3 Failure
ACTION TAKE BY CONTROL = Compressor shut off
RESET METHOD = Manual
PROBABLE CAUSE = High-Pressure Swicth Trip or High Discharge gas temperature swicth Trip, or Compressor ground current >2 5 amp or Compressor board relay on.
When it is not supposed to be on, wiring error between electronic control and Compressor protection module

Display = 54
Description Of Failure
30GB
= Compressor
040 to 60 =
070 =
075 to 100 =
110 to 150 =
175-200 = 4
30GT
225 to 280 = A4 Failure
ACTION TAKE BY CONTROL = Compressor shut off
RESET METHOD = Manual
PROBABLE CAUSE = High-Pressure Swicth Trip or High Discharge gas temperature swicth Trip, or Compressor ground current >2 5 amp or Compressor board relay on.
When it is not supposed to be on, wiring error between electronic control and Compressor protection module

Display = 55
Description Of Failure
30GB
= Compressor
040 to 60 = 2
070 = 3
075 to 100 = 3
110 to 150 = 4
175-200 = 5
30GT
225 to 280 = B1 Failure
ACTION TAKE BY CONTROL = Circuit 2 or B shut off
RESET METHOD = Manual
PROBABLE CAUSE = High-Pressure Swicth Trip or High Discharge gas temperature swicth Trip, or Compressor ground current >2 5 amp or Compressor board relay on.
When it is not supposed to be on, wiring error between electronic control and Compressor protection module

Display = 56
Description Of Failure
30GB
= Compressor
040 to 60 =
070 =
075 to 100 = 4
110 to 150 = 5
175-200 = 6
30GT
225 to 280 = B2 Failure
ACTION TAKE BY CONTROL = Comprssor shut off
RESET METHOD = Manual
PROBABLE CAUSE = High-Pressure Swicth Trip or High Discharge gas temperature swicth Trip, or Compressor ground current >2 5 amp or Compressor board relay on.
When it is not supposed to be on, wiring error between electronic control and Compressor protection module

Display = 57
Description Of Failure
30GB
= Compressor
040 to 60 =
070 =
075 to 100 =
110 to 150 = 6
175-200 = 7
30GT
225 to 280 = B4 Failure
ACTION TAKE BY CONTROL = Compressor shut off
RESET METHOD = Manual
PROBABLE CAUSE = High-Pressure Swicth Trip or High Discharge gas temperature swicth Trip, or Compressor ground current >2 5 amp or Compressor board relay on.
When it is not supposed to be on, wiring error between electronic control and Compressor protection module

Display = 58
Description Of Failure
30GB
= Compressor
040 to 60 =
070 =
075 to 100 =
110 to 150 =
175-200 = 8
30GT
225 to 280 = B4 Failure
ACTION TAKE BY CONTROL = Compressor shut off
RESET METHOD = Manual
PROBABLE CAUSE = High-Pressure Swicth Trip or High Discharge gas temperature swicth Trip, or Compressor ground current >2 5 amp or Compressor board relay on.
When it is not supposed to be on, wiring error between electronic control and Compressor protection module

Display = 59
Description Of Failure = Loss of charge Circuit 1 or A
ACTION TAKE BY CONTROL = Circuit 1 or A Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = Low refrigerant charge, or low pressure Swicth Failure

Display = 60
Description Of Failure = Loss of Charge Circuit 2 or B
ACTION TAKE BY CONTROL = Circuit 2 or B Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = Low refrigerant charge, or low pressure Swicth Failure

Display = 61
Description Of Failure = Low Cooler Flow
ACTION TAKE BY CONTROL = Unit Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = No Cooler flow or reversed cooler flow

Display = 63
Description Of Failure = Low oil pressure circuit 1 or A
ACTION TAKE BY CONTROL = Circuit 1 or A Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = Oil pump failure or low oil level, or swicth failure or Compressor CB Tripped

Display = 64
Description Of Failure = Low oil pressure circuit 2 or B
ACTION TAKE BY CONTROL = Circuit 2 or B Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = Oil pump failure or low oil level, or swicth failure or Compressor CB Tripped

Display = 65
Description Of Failure = Freeze Protection
ACTION TAKE BY CONTROL = Unit Shut Off
RESET METHOD = Auto
PROBABLE CAUSE = Low Cooler Flow

Display = 66
Description Of Failure = High Suction Supeheat Circuit 1 or A
ACTION TAKE BY CONTROL = Circuit 1 or A Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = Low Charge or Plugged Filter Drier or EXV Failure or Bad Thermistor

Display = 67
Description Of Failure = High Suction Supeheat Circuit 2 or B
ACTION TAKE BY CONTROL = Circuit 2 or B Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = Low Charge or Plugged Filter Drier or EXV Failure or Bad Thermistor

Display = 68
Description Of Failure = Low Suction Superheat Circuit 1or A
ACTION TAKE BY CONTROL = Circuit 1 or A Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = EXV Failure or Bad Thermistor

Display = 69
Description Of Failure = Low Suction Superheat Circuit 2 or B
ACTION TAKE BY CONTROL = Circuit 2 or B Shut Off
RESET METHOD = Manual
PROBABLE CAUSE = EXV Failure or Bad Thermistor

Display = 70
Description Of Failure = Illegal Unit Configuration
ACTION TAKE BY CONTROL = Unit Will Not Start
RESET METHOD = Manuat
PROBABLE CAUSE = Configuration Error (See Note 3)

Display = 71
Description Of Failure = Leaving Water Thermistor Failure
ACTION TAKE BY CONTROL = Unit Shut Off
RESET METHOD = Auto
PROBABLE CAUSE = Thermistor Failure or Wiring Error, or Thermistor not connected to Processor Board.

Display = 72
Description Of Failure = Entering Water Thermistor Failure
ACTION TAKE BY CONTROL = Use Default Value
RESET METHOD = Auto
PROBABLE CAUSE = Thermistor Failure or Wiring Error, or Thermistor not connected to Processor Board

Display = 75
Description Of Failure = Saturated Cond Thermistor Failure Circuit 1 or A
ACTION TAKE BY CONTROL = Unit Shut Off
RESET METHOD = Auto
PROBABLE CAUSE = Thermistor Failure or Wiring Error, or Thermistor not connected to Processor Board

Display = 76
Description Of Failure = Saturated Cond Thermistor Failure Circuit 2 or B
ACTION TAKE BY CONTROL = Unit Shut Off
RESET METHOD = Auto
PROBABLE CAUSE = Thermistor Failure or Wiring Error, or Thermistor not connected to Processor Board

Display = 77
Description Of Failure = Cooler Thermistor Failure Circuit 1 or A
ACTION TAKE BY CONTROL = Unit Shut Off
RESET METHOD = Auto
PROBABLE CAUSE = Thermistor Failure or Wiring Error, or Thermistor not connected to Processor Board

Display = 78
Description Of Failure = Cooler Thermistor Failure Circuit 2 or B
ACTION TAKE BY CONTROL = Unit Shut Off
RESET METHOD = Auto
PROBABLE CAUSE = Thermistor Failure or Wiring Error, or Thermistor not connected to Processor Board

Display = 79
Description Of Failure = Compressor Thermistor Failure Circuit 1 or A
ACTION TAKE BY CONTROL = Unit Shut Off
RESET METHOD = Auto
PROBABLE CAUSE = Thermistor Failure or Wiring Error, or Thermistor not connected to Processor Board

Display = 80
Description Of Failure = Compressor Thermistor Failure Circuit 2 or B
ACTION TAKE BY CONTROL = Unit Shut Off
RESET METHOD = Auto
PROBABLE CAUSE = Thermistor Failure or Wiring Error, or Thermistor not connected to Processor Board

Display = 81
Description Of Failure = Reset Temperature Failure
ACTION TAKE BY CONTROL = Stop Reset
RESET METHOD = Auto
PROBABLE CAUSE = Potentiometer improperly connected or Potentiometer setting out of range or Potentiometer Failure or Wiring Error

Display = 82
Description Of Failure = Leaving Water Set Point Potentiometer Failure
ACTION TAKE BY CONTROL = Use Default Value
RESET METHOD = Auto
PROBABLE CAUSE = Potentiometer improperly connected or Potentiometer setting out of range or Potentiometer Failure or Wiring Error

Display = 84
Description Of Failure = Reset Limit Set Point Potentiometer Failure
ACTION TAKE BY CONTROL = Stop Reset
RESET METHOD = Auto
PROBABLE CAUSE = Potentiometer improperly connected or Potentiometer setting out of range or Potentiometer Failure or Wiring Error

Display = 85
Description Of Failure = Demand Limit Potentiometer Failure
ACTION TAKE BY CONTROL = Stop Demand Limit
RESET METHOD = Auto
PROBABLE CAUSE = Potentiometer improperly connected or Potentiometer setting out of range or Potentiometer Failure or Wiring Error

Display = 86
Description Of Failure = Reset Ratio Potentiometer Failure
ACTION TAKE BY CONTROL = Stop Reset
RESET METHOD = Auto
PROBABLE CAUSE = Potentiometer improperly connected or Potentiometer setting out of range or Potentiometer Failure or Wiring Error

Display = 87
Description Of Failure = Reset Set Point Potentiometer Failure
ACTION TAKE BY CONTROL = Stop Reset
RESET METHOD = Auto
PROBABLE CAUSE = Potentiometer improperly connected or Potentiometer setting out of range or Potentiometer Failure or Wiring Error

Display = 83
Description Of Failure = None
ACTION TAKE BY CONTROL = Unit Operated Normally
RESET METHOD =
PROBABLE CAUSE = Wrong EPROM

NOTES
1. In 30GT225-280 units Circuit 1 is Circuit A and Circuit 2 is Circuit B
2. Freeze protection trips at 35F (17C) for water and 6F (33C) below set point for brine units Resets at 6F (33C) above set point
3. Illegal unit configuration caused by missing programmableheader or both unloader dip switches on
4. All AUTO reset failure that cause the unit to stop will restart the unit when the error has been corrected
5. All manual reset errors must be reset by turning the control circuit breaker off and on
6. Valid resistant range for thermistor in 362939 OHM to 216 65 OHM

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Amana PTAC R410A Error Code

CODE = FP Modes STATUS = Freeze Protection Engaged. The room temperature measured by the wireless remote thermostat or indoor ambient thermistor active sensor falls below 40°F. DISPLAY = Y ERROR LIGHT = N SUGGESTED ACTION = No Action required. This setting will disengage when the room temperature rises above 43°F CODE = Fd Modes STATUS = Front Desk switch is closed. All outputs are switched off. DISPLAY = Y ERROR LIGHT = N SUGGESTED ACTION = Open front desk switch to allow occupant unit operation. CODE = Eo Modes STATUS = Un-Configured Service Board - All operation held awaiting configuration DISPLAY = Y ERROR LIGHT = Y SUGGESTED ACTION = Enter Configuration Menu and set "C3" to "C" for coolers with electric heat or "H" for heat pumps. CODE = EH Modes STATUS = Emeregency Hydronic Engaged. The EHH switch is closed. Compressor is switched off. DISPLAY = Y ERROR LIGHT = N SUGGESTED ACTION = Open front emergency hydronic switch to allow occupant unit operation. CODE = LS Modes STATUS = Load Shedding Engaged. The LS switch is closed. Compressor and Electric heat is switched off. DISPLAY = Y ERROR LIGHT = N SUGGESTED ACTION = Open load shedding switch to allow occupant unit operation. CODE = On Modes STATUS = Control is configured to respond to a wired thermostat DISPLAY = Y ERROR LIGHT = N SUGGESTED ACTION = No action if a wired thermostat is being used. Otherwise, see Configuration Settings. CODE = F1 FAILURES STATUS = Indoor Ambient Thermistor reads outside the range -20°F to 200°F & the wireless thermostat is not communicating to the unit control or DISPLAY = Y ERROR LIGHT = Y SUGGESTED ACTION = Replace black Indoor Ambient Thermistor or Wireless Remote Thermostat. CODE = F1 FAILURES STATUS = Indoor Ambient Thermistor (IAT) without a wireless remote thermostat reads outside the range -20°F to 200°F. DISPLAY = Y ERROR LIGHT = Y SUGGESTED ACTION = Replace black Indoor Ambient Thermistor or Wireless Remote Thermostat. CODE = F2 FAILURES STATUS = Wireless Remote Thermostat failure DISPLAY = N ERROR LIGHT = N SUGGESTED ACTION = Replace Wireless Thermostat. CODE = F3 FAILURES STATUS = Indoor Ambient Thermistor reads outside the range -20°F to 200°F DISPLAY = Y ERROR LIGHT = N SUGGESTED ACTION = Replace black Indoor Ambient Thermistor. CODE = F4 FAILURES STATUS = Indoor Coil Thermistor either above or below operating tolerance DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Replace Red Indoor Coil Thermistor . CODE = F5 FAILURES STATUS = Wireless Thermostat failure. DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Attempt to rebind Wireless Thermostat or Replace Wireless Thermostat. CODE = F6 FAILURES STATUS = Indoor Discharge Thermistor either above or below operating tolerances. DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Replace Yellow Indoor Discharge Thermistor. CODE = Fb FAILURES STATUS = Low Remote Battery Warning DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Replace Batteries in Wireless Devices. CODE = H1 FAILURES STATUS = High Voltage Protection engaged. Power supply voltage is to high. DISPLAY = Y ERROR LIGHT = N SUGGESTED ACTION = Check for incoming power at correct voltage. CODE = br FAILURES STATUS = Brown Out Protection engaged. Power was lost or voltage is low. DISPLAY = N ERROR LIGHT = N SUGGESTED ACTION = Check for incoming power at correct voltage. CODE = L6 AIRFLOW ALERT STATUS = Discharge Air Too Hot. DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Clean Filter or Remove Air Blockage CODE = LC AIRFLOW ALERT STATUS = Outdoor Coil Thermistor temperature high. DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Clean Condenser Coils, Check Fan for fault. Code will reset after cleaning. CODE = C2 AIRFLOW ALERT STATUS = Indoor Air Recirculation. Large delta between thermostat and return. DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Clean Condenser Coils, Check Fan for fault. Code will reset after cleaning. CODE = C5 AIRFLOW ALERT STATUS = Outdoor Coil temperature too high for outdoor ambient temperature. DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Check for Blocked Outdoor Air or Clean Coil. CODE = C3 REFRIGERATION ALERT STATUS = Indoor Coil is freezing up. DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Clean filter, Check for fan and blower operation, Check for Refrigerant loss or Restricted capillary tube. CODE = C4 REFRIGERATION ALERT STATUS = Indoor Coil froze up. DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Clean filter, Check for fan and blower operation, Check for Refrigerant loss or Restricted capillary tube. CODE = C6 REFRIGERATION ALERT STATUS = Poor Unit Performance. DISPLAY = N ERROR LIGHT = Y SUGGESTED ACTION = Check for blower motor, compressor, or electric heat operation.

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McQuay MWH-C-2009 Error Code

MODEL :
MWH008C/CR MWH010C/CR MWH013C/CR
MWH015C/CR MWH020C/CR MWH025C/CR
MWH028C/CR MWH030C/CR MWH040C/CR
MWH050C/CR MWH060C/CR MWH065C/CR
MWH070C/CR

Troubleshooting
Should a major problem develop, refer to the following information for possible cause and corrective steps:

Neither fan nor compressor runs (No power supply)

1. The fuse may be blown or the circuit Breaker is open. Check electrical circuits and motor windings for shorts or grounds.
Investigate for possible overloading.
Replace fuse or reset circuit Breakers after fault is corrected.
2. Wires may be loose or broken. Tighten or replace.
3. Supply voltage may be too low. Check it with the power company.
4. Control system may be faulty. Check thermostat for correct wiring and check 24 volt transformer for burnout.

Fan runs but compressor does not run

1. Check compressor capacitor.
2. Wires may be loose or broken. Tighten or replace.
3. The high pressure switch may have tripped due to:
a) Fouled or plugged condenser;
b) Lack of or no condenser water;
c) Too warm condenser water;
d) Not enough airflow over the coil due to dirty filters.
5. Check thermostat setting, calibration and wiring.
6. The compressor overload protection is open. If the compressor dome is extremely hot, the overload will not reset
until cooled down. If the overload is external, replace it. If the overload is internal, replace the compressor.
7. The compressor winding may be open. Check continuity with ohmmeter. If the winding is open, replace the
compressor.

Compressor attempts to start but is not successful

1. Check continuity for contactor.
2. High pressure trip check.
3. High superheat results in high discharge temperature.
4. Lack of refrigerant.

Compressor stops after short run

1. Check thermostat setting.
2. Check system pressure.
3. Refer to troubleshooting-3 possible causes.

Insufficient cooling or heating

1. Check thermostat setting.
2. Airflow may be insufficient. Check and clean the filter.
3. The reversing valve may defects, creating a bypass of refrigerant. If the unit will heat, check the reversing valve
coil.
4. Check capillary tubes for possible chock of refrigerant flow.
5. Check if any block in water flow or if the water is dirty.
6. Lack of refrigerant.

Insufficient water flow through condenser (tube in tube)

1. Check whether valves are opened.
2. Check for air is trapped in piping.
3. Check circulating pumps.
4. Check if correct water pump sizing.

Water dripping

1. Check condensate drain.
2. Check for dirty filter.
3. Check to see if condensate drain runs uphill.
4. See if blower motor is up to speed.
5. Check for blower position.
6. Are drain pipe properly trapped?

Noisy unit operation

1. Check for fan wheel whether it is hitting the housing.
2. Check if any dented fan wheel.
3. Check if there is loose fan wheel on shaft.
4. Check if any tubing is touching the compressor. Readjust tubing by bending slightly.
5. Check all screws on panels.
6. Check water flow rate.

Controller Error Code
Error code - Causes
E1 Compressor2 low pressure faulty
E2 Compressor2 high pressure faulty
E3 Compressor2 overload
E4 Indoor coil2 temperature sensor fault
E5 System 2 leaving water temperature2 faulty
F2 Indoor coil1 temperature sensor fault
F4 Return air temperature sensor fault
F6 Communication faulty
F9 Compressor1 refrigerant leak
FE Compressor2 refrigerant leak
H1 Compressor1 overload
H4 Compressor1 high pressure faulty
L1 Compressor1 low pressure faulty
L3 Temperature of water entering too high or low
L4 Water flow switch faulty
L5 System 1 leaving water temperature1 faulty

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Sanyo KS0971 KS1271 Error Code

Since the indications cover various units, the corresponding parts listed below may not be present in some models.

A = OFF B = Blinking C = ON (Illuminated)

Indication on indoor unit 

Qutlet (3)  = A

Timer (2)  = A

Operation (1)  = B

Code   = S01

Diagnotice item  = Room temperature sensor failure

Diagnotics contents 

(1) Sensor open circuit or short circuit

(2) Contact failure at connector or open circuit at terminal crimping location

(short-circuit detection only for the humidity sensor)

(3) Indoor/outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = A

Timer (2)  = B

Operation (1)  = A

Code   = S02

Diagnotice item  = Indoor heat exchanger sensor failure

Diagnotics contents 

(1) Sensor open circuit or short circuit

(2) Contact failure at connector or open circuit at terminal crimping location

(short-circuit detection only for the humidity sensor)

(3) Indoor/outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = A

Timer (2)  = B

Operation (1)  = B

Code   = S03

Diagnotice item  = Humidity sensor failure

Diagnotics contents 

(1) Sensor open circuit or short circuit

(2) Contact failure at connector or open circuit at terminal crimping location

(short-circuit detection only for the humidity sensor)

(3) Indoor/outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = B

Timer (2)  = A

Operation (1)  = A

Code   = S04

Diagnotice item  = Compressor temperature sensor failure

Diagnotics contents 

(1) Sensor open circuit or short circuit

(2) Contact failure at connector or open circuit at terminal crimping location

(3) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = B

Timer (2)  = A

Operation (1)  = B

Code   = S05

Diagnotice item  = Outdoor heat exchanger sensor failure

Diagnotics contents 

(1) Sensor open circuit or short circuit

(2) Contact failure at connector or open circuit at terminal crimping location

(3) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = B

Timer (2)  = B

Operation (1)  = A

Code   = S06

Diagnotice item  = Outdoor air temperature sensor failure

Diagnotics contents 

(1) Sensor open circuit or short circuit

(2) Contact failure at connector or open circuit at terminal crimping location

(3) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = B

Timer (2)  = B

Operation (1)  = B

Code   = S07

Diagnotice item  = Outdoor electrical current detection failure

Diagnotics contents = Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = A

Timer (2)  = A

Operation (1)  = C

Code   = E01

Diagnotice item  = Indoor/outdoor communications failure (serial communications)

Diagnotics contents 

(1) Mis-wiring (2) AC power failure (3) Blown fuse (4) Power relay failure

(5) Indoor or outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = A

Timer (2)  = C

Operation (1)  = A

Code   = E02

Diagnotice item  = • HIC circuit failure • Power Tr (transistor) circuit failure

Diagnotics contents 

(1) HIC or power Tr failure (2) Outdoor fan does not turn. (3) Instantaneous power outage

(4) Service valve not opened. (5) Outdoor fan blocked. (6) Continuous overload operation

(7) Compressor failure (8) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = A

Timer (2)  = C

Operation (1)  = C

Code   = E03

Diagnotice item  = Outdoor unit external ROM (OTP data) failure

Diagnotics contents = (1) External ROM data failure (2) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = C

Timer (2)  = A

Operation (1)  = A

Code   = E04

Diagnotice item  = Peak current cut-off

Diagnotics contents 

(1) Instantaneous power outage (2) HIC or power transistor failure

(3) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = C

Timer (2)  = A

Operation (1)  = C

Code   = E05

Diagnotice item  = .PAM circuit failure .Active circuit failure

Diagnotics contents 

(1) Outdoor circuit board failure (2) Outdoor power supply voltage failure

Indication on indoor unit 

Qutlet (3)  = C

Timer (2)  = C

Operation (1)  = A

Code   = E06

Diagnotice item  = Compressor discharge overheat prevention activated.

Diagnotics contents 

(1) Electric expansion valve failure (2) Capillaries choked (3) Shortage of refrigerant

(4) Continuous overload operation (5) Outdoor fan does not rotate (6) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = C

Timer (2)  = C

Operation (1)  = C

Code   = E07

Diagnotice item  = Indoor fan operating failure

Diagnotics contents = (1) Fan motor failure (2) Contact failure at connector (3) Indoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = B

Timer (2)  = B

Operation (1)  = C

Code   = E08

Diagnotice item  = -4-way valve switching failure -Indoor zero-cross failure

Diagnotics contents 

(1) 4-way valve failure (heat pump model only)

(2) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = B

Timer (2)  = C

Operation (1)  = B

Code   = E09

Diagnotice item  = No-refrigerant protection

Diagnotics contents 

(1) Service valve not opened. (2) Shortage of refrigerant

Indication on indoor unit 

Qutlet (3)  = B

Timer (2)  = C 

Operation (1)  = C

Code   = E10

Diagnotice item  = DC compressor drive circuit failure

Diagnotics contents = (1) Open phase (2) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = C

Timer (2)  = B 

Operation (1)  = B

Code   = E11

Diagnotice item  = Outdoor fan operating failure

Diagnotics contents = (1) Fan motor failure (2) Contact failure at connector (3) Outdoor circuit board failure

Indication on indoor unit 

Qutlet (3)  = C

Timer (2)  = B

Operation (1)  = C

Code   = E12

Diagnotice item  

Outdoor system communications failure.

Outdoor high-pressure SW.

OLR operation.

Outdoor power supply open phase.

Outdoor coil freezing.

Diagnotics contents 

(1) Mis-wiring (2) Blown fuse (3) Power relay failure (4) Open phase

(5) Outdoor circuit board failure (6) Compressor failure

Indication on indoor unit 

Qutlet (3)  = C

Timer (2)  = C 

Operation (1)  = B

Code   = E13

Diagnotice item  = Freeze-prevention operation activated

Diagnotics contents 

(1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation

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Fujitsu Consealed Ceiling Error Code

Indoor unit

Error contents
Communication error = Indoor unit - Outdoor unit
Indoor unit LED
OPERATION (Red) = off
TIMER (Green) = 2 - 5 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 01

Error contents
Communication error = Indoor unit - Wired remote controller
Indoor unit LED
OPERATION (Red) = off
TIMER (Green) = 8 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 00

Error contents
Indoor unit temperature error = Room temp. sensor error
Indoor unit LED
OPERATION (Red) = 2 flashes
TIMER (Green) = 2 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 02 or 03

Error contents
Indoor unit temperature error = Heat exchanger temp. sensor error
Indoor unit LED
OPERATION (Red) = 2 flashes
TIMER (Green) = 3 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 04 or 05

Error contents
Outdoor unit temperature error = Discharge pipe temp. sensor error
Indoor unit LED
OPERATION (Red) = 3 flashes
TIMER (Green) = 2 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 0C or 0d

Error contents
Outdoor unit temperature error = Heat exchanger temp. sensor error
Indoor unit LED
OPERATION (Red) = 3 flashes
TIMER (Green) = 3 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 06 or 07

Error contents
Outdoor unit temperature error = Outdoor temp. sensor error
Indoor unit LED
OPERATION (Red) = 3 flashes
TIMER (Green) = 4 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 0A or 0b

Error contents
Outdoor unit temperature error = 2 way valve temp. sensor error
Indoor unit LED
OPERATION (Red) = 3 flashes
TIMER (Green) = off
AIR CLEAN or QUIET (Green) = 2 flashes
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 1d

Error contents
Outdoor unit temperature error = 3 way valve temp. sensor error
Indoor unit LED
OPERATION (Red) = 3 flashes
TIMER (Green) = off
AIR CLEAN or QUIET (Green) = 3 flashes
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 1E

Error contents
Outdoor unit temperature error = Heat sinnk temp. sensor error
Indoor unit LED
OPERATION (Red) = 3 flashes
TIMER (Green) = 7 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 0E

Error contents
Outdoor unit temperature error = Compressor temp. sensor error
Indoor unit LED
OPERATION (Red) = 3 flashes
TIMER (Green) = 8 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 15

Error contents
Indoor unit control system error = MANUAL AUTO button error
Indoor unit LED
OPERATION (Red) = 4 flashes
TIMER (Green) = 2 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 20

Error contents
Indoor unit control system error = 50Hz / 60Hz distinguish error
Indoor unit LED
OPERATION (Red) = 4 flashes
TIMER (Green) = 4 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = ----

Error contents
Indoor unit control system error = Electronic Air clean filter error
Indoor unit LED
OPERATION (Red) = 4 flashes
TIMER (Green) = 7 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 21

Error contents
Indoor unit control system error = Electronic Air clean filter error
Indoor unit LED
OPERATION (Red) = 4 flashes
TIMER (Green) = 8 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 22

Error contents
Outdoor unit control system error = Current trip error
Indoor unit LED
OPERATION (Red) = 5 flashes
TIMER (Green) = 2 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 17

Error contents
Outdoor unit control system error = CT error
Indoor unit LED
OPERATION (Red) = 5 flashes
TIMER (Green) = 3 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 18

Error contents
Outdoor unit control system error = Compressor position error
Indoor unit LED
OPERATION (Red) = 5 flashes
TIMER (Green) = 5 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 1A

Error contents
Outdoor unit control system error = Fan motor error
Indoor unit LED
OPERATION (Red) = 5 flashes
TIMER (Green) = 6 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 1b

Error contents
Outdoor unit control system error = Connected indoor unit error
Indoor unit LED
OPERATION (Red) = 5 flashes
TIMER (Green) = 7 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 1F

Error contents
Outdoor unit control system error = Main CPU - sub CPU communication error
Indoor unit LED
OPERATION (Red) = 5 flashes
TIMER (Green) = 8 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 1C

Error contents
Indoor unit fan motor error = Fan motor error
Indoor unit LED
OPERATION (Red) = 6 flashes
TIMER (Green) = 2 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 12

Error contents
Indoor unit fan motor error = Fan motor error
Indoor unit LED
OPERATION (Red) = 6 flashes
TIMER (Green) = 3 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 12


Error contents
Refrigerant system error = Discharge pipe temp. error
Indoor unit LED
OPERATION (Red) = 7 flashes
TIMER (Green) = 2 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 0F

Error contents
Refrigerant system error = High pressure error
Indoor unit LED
OPERATION (Red) = 7 flashes
TIMER (Green) = 3 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 14

Error contents
Refrigerant system error = High pressure switch error
Indoor unit LED
OPERATION (Red) = 7 flashes
TIMER (Green) = 6 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 16

Error contents
Added function error = Active filter error
Indoor unit LED
OPERATION (Red) = 8 flashes
TIMER (Green) = 2 - 3 flashes
AIR CLEAN or QUIET (Green) = off
COIL DRY (Orange) = off
Wired remote controller display (option)
CODE No. = 19

Error contents
Indoor unit connect error = Indoor unit model error
Indoor unit LED
OPERATION (Red) = blinking
TIMER (Green) = blinking
AIR CLEAN or QUIET (Green) = blinking
COIL DRY (Orange) = blinking
Wired remote controller display (option)
CODE No. = 11


OUTDOOR UNIT
x = Slow flashing
y = Off

Communication error (indoor unit A to outdoor unit)
LED 1 = x 1 time
LED 2 = y
LED 3 = y
LED 4 = y

Communication error (indoor unit B to outdoor unit)
LED 1 = y
LED 2 = x 1 time
LED 3 = y
LED 4 = y

Communication error (indoor unit C to outdoor unit)
LED 1 = y
LED 2 =
LED 3 = x 1 time
LED 4 = y

Communication error (indoor unit D to outdoor unit)
LED 1 = y
LED 2 = y
LED 3 = y
LED 4 = x 1 time

Discharge pipe temperature sensor
LED 1 = x 2 times
LED 2 = y
LED 3 = y
LED 4 = y

Outdoor heat exchanger temperature sensor
LED 1 = x 3 times
LED 2 = y
LED 3 = y
LED 4 = y

Outdoor temperature sensor
LED 1 = x 4 times
LED 2 = y
LED 3 = y
LED 4 = y

Outdoor 2way valve(A) temperature sensor
LED 1 = x 5 times
LED 2 = y
LED 3 = y
LED 4 = y

Outdoor 2way valve(B) temperature sensor
LED 1 = y
LED 2 = x times
LED 3 = y
LED 4 = y

Outdoor 2way valve(C) temperature sensor
LED 1 = y
LED 2 = y
LED 3 = x 5 times
LED 4 = y

Outdoor 2way valve(D) temperature sensor
LED 1 = y
LED 2 = y
LED 3 = y
LED 4 = x 5 times

Outdoor 3way valve(A) temperature sensor
LED 1 = x 6 times
LED 2 = y
LED 3 = y
LED 4 = y

Outdoor 3way valve(B) temperature sensor
LED 1 = y
LED 2 = x 6 times
LED 3 = y
LED 4 = y

Outdoor 3way valve(C) temperature sensor
LED 1 = y
LED 2 = y
LED 3 = x 6 times
LED 4 = y

Outdoor 3way valve(D) temperature sensor
LED 1 = y
LED 2 = y
LED 3 = y
LED 4 = x 6 times

Compressor temperature sensor
LED 1 = x 7 times
LED 2 = y
LED 3 = y
LED 4 = y

Heatsink temperature sensor
LED 1 = x 8 times
LED 2 = y
LED 3 = y
LED 4 = y

Pressure switch A abnormal
LED 1 = x 9 times
LED 2 = y
LED 3 = y
LED 4 = y

Pressure switch B abnormal
LED 1 = x 10 times
LED 2 = y
LED 3 = y
LED 4 = y

Indoor unit connection capacity error
LED 1 = x 11 times
LED 2 = y
LED 3 = y
LED 4 = y

IPM error
LED 1 = x 12 times
LED 2 = y
LED 3 = y
LED 4 = y

Comoressor loter location error
LED 1 = x 13 times
LED 2 = y
LED 3 = y
LED 4 = y

Compressor can not start to operate
LED 1 = x 14 times
LED 2 = y
LED 3 = y
LED 4 = y

Outdoor fan (upper) motor error
LED 1 = x 15 times
LED 2 = y
LED 3 = y
LED 4 = y

Outdoor fan (lower) motor error
LED 1 = x 16 times
LED 2 = y
LED 3 = y
LED 4 = y

Microcomputer error
LED 1 = x 17 times
LED 2 = y
LED 3 = y
LED 4 = y

Read More ->>

VRF Trouble Shooting – Fujitsu

VRF Trouble Shooting – Fujitsu

Pipework
• Always check that the pipework follows the limitations in the corresponding user guides
• Use of dry nitrogen while brazing or when pipework open to atmosphere is vitale
• Always use a good electronic Torr gauge such as 617981 while evacuating
• If multiple indoor units are low on capacity, system is probably undercharged
• If one indoor unit is low on capacity, strainer is probably blocked
Outdoor Unit
• Gas pressures are frequently a bad guide to system gas charge
• Check the condensor coil is not blocked and airflow not impeded
• Make sure system is not over indexed if all indoor units are in the same area (inverter models)
Indoor Units & Heat Recovery (HR & RB) Boxes
• These items have pipework strainers which can, and do, block. Check these first.
• Temperature difference between return and supply air of 10C cooling/15C heating indicates system ok
• Always check condition of return air filters and clean if necessary
Controllers and Wiring
• All VRF systems have self diagnostics at the controller - see below
• Ensure control wiring is run in screened cable without exception (1mm 2 core CY suggested)
• Ensure screened cable is Earthed at one end only

Fault Diagnostic Codes
Fujitsu J Series and Airstage follow the fault codes below -
Indoor Fault Codes - access from handset • LED Codes refer to flash type

Handset = E:00
Red LED =
Green LED =
Yellow LED = No Fault Currently
Meaning =
Remedy = Run system again

Handset = E:02
Red LED = Rapid
Green LED = Rapid
Yellow LED = Model Abnormal
Meaning =
Remedy = Check DIP switches

Handset = E:03
Red LED = 5 times
Green LED = Rapid
Yellow LED = 2 times
Meaning = Processor Failure
Remedy = PCB failure

Handset = E:04
Red LED = Rapid
Green LED = Rapid
Yellow LED = Rapid
Meaning = Power Abnormal
Remedy = Swap 2 phases

Handset = E:06
Red LED = Rapid
Green LED = 4 times
Yellow LED = 1 TIme
Meaning = EEPROM Error
Remedy = PCB Failure

Handset = E:07
Red LED = Rapid
Green LED = 4 time
Yellow LED = 2 Times
Meaning = EEPROM Error
Remedy = PCB Failure

Handset = E:09
Red LED = 2 times
Green LED =
Yellow LED =
Meaning = Room Sensor Failure
Remedy = Check/Replace

Handset = E:0A
Red LED = 3 times
Green LED = Rapid
Yellow LED = 1 Time
Meaning = Middle Pipe Sensor Fail
Remedy = Check/Replace

Handset = E:0b
Red LED = 3 times
Green LED = Rapid
Yellow LED = 2 Times
Meaning = Inlet Pipe Sensor Fail
Remedy = Check/Replace

Handset = E:0C
Red LED = 3 times
Green LED = Rapid
Yellow LED = 3 Times
Meaning = Outlet Pipe Sensor Fail
Remedy = Check/Replace

Handset = E:0d
Red LED = 7 times
Green LED = Rapid
Yellow LED =
Meaning = Fan Temp Sensor Fail
Remedy = Check/Replace

Handset = E:11
Red LED = 4 times
Green LED = Rapid
Yellow LED =
Meaning = Drainage Failure
Remedy = Drains/Float Sw/Pump

Handset = E:12
Red LED = Rapid
Green LED = 7 times
Yellow LED =
Meaning = Room Temp too high/low
Remedy = Is unit over/Undersized

Handset = E:13
Red LED = 6 times
Green LED = Rapid
Yellow LED =
Meaning = Fan Failure
Remedy = Check filters/motor

Handset = E:18
Red LED = 5 times
Green LED = Rapid
Yellow LED = 1 or 4 Times
Meaning = Control Comms Failure
Remedy = Check Controller Wiring

Handset = E:1F
Red LED = Rapid
Green LED = 5 times
Yellow LED = 1 TIme
Meaning = Transmission Failure
Remedy = Check Control Wiring

Handset = E:20
Red LED = Rapid
Green LED = 5 times
Yellow LED = 2 Times
Meaning = Node Error
Remedy = Check Control Wiring

Handset = E:21
Red LED = Rapid
Green LED = 6 times
Yellow LED =
Meaning = Parralel Comms Error
Remedy = Check Control Wiring

Handset = E:32
Red LED = Rapid
Green LED = 7 times
Yellow LED =
Meaning = Outdoor Unit Error
Remedy = Check Outdoor Unit

Outdoor Codes - On Outdoor PCB • When LED1 flashes rapidly the other LEDS below -

LED = 1 flash
1 = Rapid
2 = Comp1 Fail
3 = Dis Sens1
4 = Dis Press
5 = Phase Fail
6 = ID Unit Fail

LED = 2 flashes
1 = Rapid
2 = Comp2 Fail
3 = Dis Sens2
4 = Liq Press
5 = Power Freq
6 = ID1 Fail

LED = 3 flashes
1 = Rapid
2 = Comp3 Fail
3 = Dis Sens3
4 =
5 = PCB Fail
6 = ID1 Fail

LED = 4 flashes
1 = Rapid
2 = Dis Temp1
3 = In Pipe1
4 = Comp Seize
5 = PCB Fail
6 = ID1 Fail

LED = 5 flashes
1 = Rapid
2 = Dis Temp2
3 = In Pipe2
4 = Hi Current
5 =
6 = ID1 Fail

LED = 6 flashes
1 = Rapid
2 = Dis Temp3
3 = In Pipe3
4 = CT Error
5 = PCB Fail
6 = ID1 Fail

LED = 7 flashes
1 = Rapid
2 = HP Trip
3 = Out Pipe1
4 = Oil Low
5 = PCB Fail
6 = ID1 Fail

LED = 8 flashes
1 = Rapid
2 = LP Trip
3 = Out Pipe2
4 =
5 = Comms Fail
6 = ID1 Fail

LED = 9 flashes
1 = Rapid
2 = Pump
3 = Out Pipe3
4 = L startup
5 = Comms Fail
6 =

LED = 10 flashes
1 = Rapid
2 = Down
3 = Suct Pipe
4 =
5 =
6 = ID1 Fail

LED = 11 flashes
1 = Rapid
2 = Error
3 = Air Sensor
4 =
5 =
6 =

If all PCB’s flash rapidly check DIP switch settings

Read More ->>

Panasonic Fault codes - FS Series

Fault Codes – FS Series

Current Models R410a

Pressing Check on the wired remote while CHECK is flashing will give the Fault and the address of the unit with the Fault

Pressing Timer Set with the fault displayed will display a second code giving further information (detail code)

Pressing Check for 5 seconds will check past faults

On wireless handsets press the temp up for 5 seconds to enter error check mod

Scroll through the codes using the temp up button until a beep is heard from the indoor unit

Press set and repeat until the full code is displayed

F Code Display  = F15

Detail Display  = 01

Outdoor LED

302  =

303  = Flash

304  = Flash

305  = Flash

306  = Flash

307  = See Note 1

308  = See Note 1

309  =

Measurig Fault Code = Drain Failure

F Code Display  = F16

Detail Display  = 01

Outdoor LED

302  =

303  =

304  =

305  =

306  =

307  = Flash

308  = See Note 1

309  = See Note 1

Measurig Fault Code = Louvre Failure

F Code Display  = F17

Detail Display  = 01

Outdoor LED

302  = 

303  =

304  =

305  =

306  =

307  =

308  = See Note 1

309  = See Note 1

Measurig Fault Code = Option Problem

F Code Display  = F17

Detail Display  = 02

Outdoor LED

302  = Flash

303  = Flash

304  =

305  =

306  =

307  = Flash

308  = See Note 1

309  = See Note 1

Measurig Fault Code = DC Fan Motor Failure

F Code Display  = F20

Detail Display  = 01

Outdoor LED

302  =

303  =

304  =

305  = Flash

306  =

307  = Flash

308  = See Note 1

309  = See Note 1

Measurig Fault Code = ID Air Sensor

F Code Display  = F20

Detail Display  = 02

Outdoor LED

302  = Flash

303  =

304  =

305  = Flash

306  =

307  = Flash

308  = See Note 1

309  = See Note 1

Measurig Fault Code = RC Air Sensor

F Code Display  = F21

Detail Display  = 01

Outdoor LED

302  =

303  = Flash

304  =

305  = Flash

306  =

307  = Flash

308  = See Note 1

309  = See Note 1

Measurig Fault Code = ID Pipe Sensor

F Code Display  = F25

Detail Display  = 01

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *Only for Older Models with LEDS 1-6

308  = See Note 1

309  = See Note 1

Measurig Fault Code = Addressing Incorrect

F Code Display  = F26

Detail Display  = 01

Outdoor LED

302  =

303  =

304  = Flash

305  =

306  = Flash

307  = Flash

308  = See Note 1

309  = See Note 1

Measurig Fault Code = RC Comms Problem

F Code Display  = F27

Detail Display  = 01

Outdoor LED

302  =

303  = Flash

304  = Flash

305  =

306  = Flash

307  = Flash

308  = See Note 1

309  = See Note 1

Measurig Fault Code = ID - OD Comms Disconnected ID

F Code Display  = F27

Detail Display  = 02

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *Only for Older Models with LEDS 1-6

308  = See Note 1

309  = See Note 1

Measurig Fault Code = ID - OD Comms Connection ID

F Code Display  = F27

Detail Display  = 05

Outdoor LED

302  = Flash

303  = Flash

304  = Flash

305  =

306  = Flash

307  = Flash

308  = See Note 1

309  = See Note 1

Measurig Fault Code = ID - OD Comms Connection ID

F Code Display  = F27

Detail Display  = 01

Outdoor LED

302  = Flash

303  =

304  = Flash

305  =

306  = Flash

307  =

308  =

309  =

Measurig Fault Code = ID - OD Comms Disconnected OD

F Code Display  = F27

Detail Display  = 02

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code = ID - OD Comms Connection OD

F Code Display  = F27

Detail Display  = 05

Outdoor LED

302  =

303  =

304  =

305  =

306  = Flash

307  =

308  =

309  =

Measurig Fault Code = ID - OD Comms Connection OD

F Code Display  = F29

Detail Display  = 01

Outdoor LED 

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code = ID PCB Setting

F Code Display  = F30

Detail Display  = 01

Outdoor LED

302  =

303  =

304  =

305  =

306  =

307  = Flash

308  =

309  =

Measurig Fault Code = ID/OD Capacity Incorrect

F Code Display  = F30

Detail Display  = 02

Outdoor LED

302  =

303  =

304  = Flash

305  =

306  =

307  = Flash

308  =

309  =

Measurig Fault Code = Phase Rotation

F Code Display  = F31

Detail Display  = 01

Outdoor LED

302  =

303  = Flash

304  =

305  =

306  =

307  =

308  =

309  =

Measurig Fault Code = Low Pressure

F Code Display  = F31

Detail Display  = 02

Outdoor LED

302  = Flash

303  =

304  =

305  =

306  =

307  =

308  =

309  =

Measurig Fault Code = High Pressure

F Code Display  = F31

Detail Display  = 06

Outdoor LED

302  =

303  =

304  = Flash

305  = Flash

306  = 

307  =

308  =

309  =

Measurig Fault Code = Reversing Valve

F Code Display  = F31

Detail Display  = 08

Outdoor LED

302  =

303  = Flash

304  =

305  =

306  =

307  = Flash

308  =

309  =

Measurig Fault Code = Indoor Coil Iced

F Code Display  = F31

Detail Display  = 09

Outdoor LED

302  =

303  = Flash

304  = Flash

305  = Flash

306  =

307  =

308  =

309  =

Measurig Fault Code = Gas Leak

F Code Display  = F31

Detail Display  = 10

Outdoor LED

302  =

303  = Flash

304  = Flash

305  =

306  = Flash

307  =

308  =

309  =

Measurig Fault Code = Low Gas, Valve Shut or Blockage

F Code Display  = F32

Detail Display  = 03

Outdoor LED

302  =

303  =

304  = Flash

305  =

306  = Flash

307  =

308  =

309  =

Measurig Fault Code = Inverter Low dc Volts

F Code Display  = F32

Detail Display  = 04

Outdoor LED

302  = Flash

303  = Flash

304  =

305  =

306  = Flash

307  =

308  =

309  =

Measurig Fault Code = Inverter IPM

F Code Display  = F32

Detail Display  = 05

Outdoor LED

302  = Flash

303  = Flash

304  = 

305  =

306  =

307  =

308  =

309  =

Measurig Fault Code = Compressor Overcurrent

F Code Display  = F32

Detail Display  = 06

Outdoor LED

302  = Flash

303  = Flash

304  =

305  = Flash

306  =

307  =

308  =

309  =

Measurig Fault Code = Compressor Disch Temp High

F Code Display  = F32

Detail Display  = 08

Outdoor LED

302  = Flash

303  = 

304  = Flash

305  = Flash

306  =

307  =

308  =

309  =Inverter PFC

Measurig Fault Code = 

F Code Display  = F32

Detail Display  = 09

Outdoor LED

302  = Flash

303  =

304  =

305  =

306  = Flash

307  =

308  =

309  =

Measurig Fault Code = Inverter High dc Volts

F Code Display  = F32

Detail Display  = 10

Outdoor LED

302  = Flash

303  = Flash

304  = Flash

305  = 

306  =

307  =

308  =

309  =

Measurig Fault Code = Compressor Rotation Problem

F Code Display  = F33

Detail Display  = 01

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code = Compressor High Current

F Code Display  = F33

Detail Display  = 02

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code = High Discharge Temp

F Code Display  = F35

Detail Display  = 2

Outdoor LED

302  =

303  = Flash

304  =

305  =

306  = Flash

307  =

308  =

309  =

Measurig Fault Code = OD dc Fan Motor Locked

F Code Display  = F40

Detail Display  = 01

Outdoor LED

302  =

303  =

304  = Flash

305  =

306  =

307  =

308  =

309  =

Measurig Fault Code = OD Outlet Sensor

F Code Display  = F40

Detail Display  = 11

Outdoor LED

302  =

303  =

304  =

305  = Flash

306  =

307  =

308  =

309  =

Measurig Fault Code = Suction Temp

F Code Display  = F40

Detail Display  = 21

Outdoor LED

302  = Flash

303  =

304  = Flash

305  =

306  =

307  =

308  =

309  =

Measurig Fault Code = OD Liquid Sensor

F Code Display  = F40

Detail Display  = 31

Outdoor LED

302  = Flash

303  = Flash

304  = Flash

305  =

306  =

307  =

308  =

309  =

Measurig Fault Code = Defrost Sensor

F Code Display  = F40

Detail Display  = 51

Outdoor LED

302  =

303  = Flash

304  = Flash

305  =

306  =

307  =

308  =

309  =

Measurig Fault Code = Discharge Sensor

F Code Display  = F40 

Detail Display  = 41

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code = Discharge Sensor

F Code Display  = F40 

Detail Display  = 61

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code =  OD Pipe Sensor

F Code Display  = F41

Detail Display  = 02

Outdoor LED

302  = Flash

303  = Flash

304  =

305  =

306  =

307  = Flash

308  =

309  =

Measurig Fault Code = HP Switch

F Code Display  = F41

Detail Display  = 03

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code =  Heating HP Switch

F Code Display  = F41

Detail Display  = 11

Outdoor LED

302  = Flash

303  =

304  =

305  =

306  =

307  = Flash

308  =

309  =

Measurig Fault Code = Low Pressure Sensor

F Code Display  = F42

Detail Display  = 01

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code =  Compressor Current Sensor

F Code Display  = F42

Detail Display  = 11

Outdoor LED

302  =

303  = Flash

304  =

305  = Flash

306  =

307  =

308  =

309  =

Measurig Fault Code = Current Sensor Open

F Code Display  = F44

Detail Display  = 01

Outdoor LED

302  = Flash

303  =

304  =

305  = Flash

306  =

307  =

308  =

309  =

Measurig Fault Code = Inverter IPM Sensor

F Code Display  = F49

Detail Display  = 01

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code =  OD PCB Setting Faulty

F Code Display  = F49

Detail Display  = 02

Outdoor LED

302  = *

303  = *

304  = *

305  = *

306  = *

307  = *

308  = *

309  = *Only for Older Models with LEDS 1-6

Measurig Fault Code =  OD PCB Setting Faulty

Note 1: LED308 is lit if the master unit is the problem or 309 for the slave

LED 301 is lit when power is supplied to the PCB

A General Guide To Urban Style Products

Pipework

• Pipe sizes and lengths should be as the relevant Technical Guide

• Both lines should be insulated

• No line accessories or oil traps should be fitted

• In cooling mode the suction line should sweat, but not freeze

• In heating mode both pipes should be between 30 and 60C

• Pipework should be refrigeration quality

• Look for restrictions. They could cause compressor failures.

Outdoor Unit

• Discharge Temperature should be between 50 and 70C

• Suction Temperature should be between -3 and 4C

• Check Suction Line is sweating in cooling - problem if not!

• Hot Recip. Compressor = PROBLEM

• Sweating/Frost on expansion line - undercharged

Indoor Unit

• Is it level? Have we adequate drainage?

• Smells are always due to site conditions or drains.

• Flashing lights? = Fault Diagnostics - see over

• When were the filters last cleaned?

• Is the unit too large/small (between 5/20 air circs/hr)

• Is the air short cycling?

Controller

• Is it a wired or wireless handset.

• Is the handset too far away?

• When were the batteries changed last?

• With wired handset, check for interference.

• Is the unit in Emergency Mode?

• Check unit and controller channels compatible

Wiring

• Interconnecting comms wiring is low voltage

• If you have 230V live, check you have a neutral as well

• Check Mains and comms cable not swapped round

• Multi linked systems must be set up as such

• Check voltage drops! Check it isn’t down to Earth!

• Interconnecting cables should be circular crimped

Selecting Emergency Mode is done at the Indoor and Outdoor Unit PCB.

It bypasses the Control Sensors and should not be done for more than 30 minutes.

Indoor PCB - Swicth SS1 to Emergency Setting

Outdoor PCB - Swicth Emergency Swicth 1 to ON

Outdoor PCB - Swicth Emergency Swicth 2 to Cool or

Wire E - 1 - 2 - 3

All Earth - Live - Neutral - Comms

Sensor Resistances – Use to check Thermistor

Air and Pipe sensors apply to indoor AND outdoor units

The discharge sensor is only in the outdoor unit.

If the fault code suggests the sensor is a problem but you

get a sensor reading as to the right then either the connection or PCB is at fault.

Sensor - At 10C - At 20C - At 30C

Air Sensor - 40K 0hms - 25K 0hms - 16K 0hms

Pipe Sensor - 40K 0hms - 25K 0hms - 16K 0hms

Discharge Sensor - 480K 0hms - 293K 0hms - 184K 0hms

Fault codes on Panasonic US systems can be checked using both the wired remote controller and the indoor and outdoor unit LEDs. In case of a malfunction

the wired controller will give a fault code as shown below in conjunction with the accompanying LED codes.

The wireless controller can be used to interrogate a fault, if required, as described below.

1 - Press Inspection/Test button on wireless handset. 0 flashes in Unit Number display on handset.

2 - Press Up/Down button until unit starts to bleep.

3 - 1 continuous beep means No fault. 3 short beeps - follow all steps below. 1 short beep - follow step 4 until you get a continuous beep.

4 - Press the handset MODE button. Press the up/down arrow button until you get 2 short bleeps, or one continuous bleep.

5 - Press the MODE button again. Press the up/down arrow button until you get one continuous bleep.

6 - The fault code is now displayed!

RC Display  = Normal

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Normal Operation

Caused By = Normal Running

RC Display  = A1

Indoor Unit LEDs

Panel   = Flash

H1P/HAP  = Various

H2P/HBP  = Various

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Indoor PCB Failure

Caused By = PCB Failure or External Spike

RC Display  = A3

Indoor Unit LEDs

Panel   = Flash

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = High Water Level

Caused By = Float Switch Tripped - Check your drains

RC Display  = A6

Indoor Unit LEDs

Panel   = Flash

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Fan Motor Failure - ID Unit

Caused By = Fan Motor not running fast enough

RC Display  = A7

Indoor Unit LEDs

Panel   = Flash

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Louvre Motor Failure

Caused By = Louvre Motor Microswitch

RC Display  = AF

Indoor Unit LEDs

Panel   = Flash

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Drain System Failure

Caused By = Float Switch Trip while compressor

RC Display  = AJ

Indoor Unit LEDs

Panel   = Flash

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Faulty Capacity Setting

Caused By = Ring Technical Support

RC Display  = C4

Indoor Unit LEDs

Panel   = Flash

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Pipe Sensor Failure

Caused By = Thermistor reading incorrect

RC Display  = C9

Indoor Unit LEDs

Panel   = Flash

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Air Sensor Failure

Caused By = Thermistor reading incorrect

RC Display  = CJ

Indoor Unit LEDs

Panel   = Flash

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Handset Thermistor failure

Caused By = Thermistor reading incorrect

RC Display  = E0

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = On

H2P  = Off

Fault Means = Safety Device Trip

Caused By = High Compressor or Fan Temperature

RC Display  = Various

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = On

H1P  = Various

H2P  = Various

Fault Means = Outdoor PCB Failure

Caused By = PCB Failure or External Spike

RC Display  = Various

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = 

H2P/HBP  = 

Outdoor Unit LEDs

HAP  = Off

H1P  = Off

H2P  = Off

Fault Means = Outdoor Power Supply or PCB Failure

Caused By = Check your power supply including neutral

RC Display  = E3

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = On

H2P  = Off

Fault Means = HP Trip

Caused By = Excess Refrigerant, blockage or contamination

RC Display  = E4

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = On

H2P  = Off

Fault Means = LP Trip

Caused By = Refrigerant shortage, blockage or contamination

RC Display  = E9

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Expansion Valve Failure

Caused By = Expansion valve closed or open circuit

RC Display  = F3

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = Off

Fault Means = Discharge Temperature Error

Caused By = Refrigerant shortage or blockage

RC Display  = H3

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = On

H2P  = On

Fault Means = Failed HP Switch

Caused By = HP trip when compressor off

RC Display  = H9

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = On

H2P  = On

Fault Means = Failed OD Temperature Sensor

Caused By = Thermistor reading incorrect

RC Display  = J3

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = On

H2P  = On

Fault Means = Failed Discharge Sensor

Caused By = Thermistor reading incorrect

RC Display  = J6

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = On

H2P  = On

Fault Means = Failed OD Pipe Sensor

Caused By = Thermistor reading incorrect

RC Display  = U0

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Various

H1P  = Various

H2P  = Various

Fault Means = Gas shortage

Caused By = Refrigerant shortage or blockage

RC Display  = U1

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Flash

H1P  = Off

H2P  = On

Fault Means = Phase protection

Caused By = Swap two phases to operate correctly

RC Display  = U4

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Various

H1P  = Various

H2P  = Various

Fault Means = ID to OD Unit Transmission failure

Caused By = Faulty connection or PCB

RC Display  = UF

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Various

H1P  = Various

H2P  = Various

Fault Means = ID to OD Unit Transmission failure

Caused By = Faulty connection or PCB

RC Display  = U5

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Various

H1P  = Various

H2P  = Various

Fault Means = ID Unit to RC Transmission failure

Caused By = Faulty connection or PCB

RC Display  = U8

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Various

H1P  = Various

H2P  = Various

Fault Means = RC to RC Transmission failure

Caused By = Faulty connection or RC

RC Display  = UA

Indoor Unit LEDs

Panel   = Off

H1P/HAP  = Flash

H2P/HBP  = Flash

Outdoor Unit LEDs

HAP  = Various

H1P  = Various

H2P  = Various

Fault Means = Field SettingSwitch

Caused By = Ring Technical Support Failure

Read More ->>

Panasonic Fault Diagnostics – Older Style FS Units R22

Fault Diagnostics – Older Style FS Units R22

First generation series 11NP Series with E style fault codes

Press check on the Wired Controller to call up the Fault Codes.

Fault Code At Remote  = E1

Indoor Unit PCB

LED1   = Flash

LED2   = Flash

LED3   = Flash

Measuring Of Fault Code = Signal from RC to ID Unit faulty

Fault Code At Remote  = E2

Indoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

Measuring Of Fault Code = Float Switch

Fault Code At Remote  = E3

Indoor Unit PCB

LED1   =

LED2   = Lit

LED3   = 

Measuring Of Fault Code = Air Sensor Faulty

Fault Code At Remote  = E4

Indoor Unit PCB

LED1   =

LED2   =

LED3   = Lit

Measuring Of Fault Code = Pipe sensor Faulty

Second Generation 21NP Series with F Fault Codes

Press Check on the Wired Controller to call up the Fault Codes

Fault Code At Remote  = F2

Indoor Unit PCB

LED1   = Lit

LED2   = Lit

LED3   =

LED4   = Lit

Outdoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   =

Measuring Of Fault Code = Float switch

Fault Code At Remote  = F3

Indoor Unit PCB

LED1   =

LED2   = Lit

LED3   =

LED4   =

Outdoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   =

Measuring Of Fault Code = Indoor Air Sensor Faulty

Fault Code At Remote  = F4

Indoor Unit PCB

LED1   =

LED2   =

LED3   = Lit

LED4   =

Outdoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   =

Measuring Of Fault Code = Indoor Air Sensor Faulty

Fault Code At Remote  = F5

Indoor Unit PCB

LED1   = Lit

LED2   = Lit

LED3   = Lit

LED4   = Lit

Outdoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   =

Measuring Of Fault Code = Signal from RC to ID faulty

Fault Code At Remote  = F5

Indoor Unit PCB

LED1   = Lit

LED2   = Lit

LED3   =

LED4   =

Outdoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   =

Measuring Of Fault Code = No Signal from ID to RC

Fault Code At Remote  = F6

Indoor Unit PCB

LED1   =

LED2   = Lit

LED3   = Lit

LED4   = Lit

Outdoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   =

Measuring Of Fault Code = Signal from ID to OD faulty

Fault Code At Remote  = F6

Indoor Unit PCB

LED1   =

LED2   =

LED3   = Lit

LED4   = Lit

Outdoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   =

Measuring Of Fault Code = No Signal from Od to ID

Fault Code At Remote  = F13

Indoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   =

Outdoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   = Lit

Measuring Of Fault Code = OD Unit Overcurrent Protection

Fault Code At Remote  = F15

Indoor Unit PCB

LED1   = Lit

LED2   =

LED3   =

LED4   =

Outdoor Unit PCB

LED1   = Lit

LED2   = Lit

LED3   =

LED4   =

Measuring Of Fault Code = HP Switch

Fault Code At Remote  = F18

Indoor Unit PCB

LED1   = Lit

LED2   =

LED3   = Lit

LED4   =

Outdoor Unit PCB

LED1   =

LED2   =

LED3   = Lit

LED4   =

Measuring Of Fault Code = Outdoor Pipe Sensor Faulty

Read More ->>

Fujitsu Inverter Error Codes

To Interrogate
When E:EE is displayed switch unit off and press the temp up and temp down buttons simultaneously for 3 seconds.
To Return to Normal Operation
Press Temp Up and Temp Down Buttons together for 3 seconds.
To Initiate Test Operation
Switch Unit Off & Press Master & Fan Buttons together for 3 seconds.
Press Start/Stop to Initiate.
Changing the Sensor Position
The unit can sense the air temperature at the unit or controller Turn Unit Off To change press THERMOSENSOR button for 5 seconds to unlock
Toggle the THERMOSENSOR button & controller is displayed Set to desired setting (unit or controller)
Press THERMOSENSOR button for 5 seconds to lock

Two Handsets/1 Unit - set on RC DIP SWs
Single handset DIP SW1 is On & 2 is Off
Dual Handset Master Both On & Slave both Off
Group Control up to 16 Unit from 1 RC Handset
Set DIP SW3 on RC to ON
Set Each ID Unit Rotary SW to Unit Address (0-15) in series
Auto Restart on Power Failure
DIP SW2-3 on ID Unit. Off is autorestart (std)/On is manual Restart
Auto Changeover
DIP SW5 on RC. On is autochangeover (std)/Off is Manual
Memory Retention on Power Failure
Dip SW6 on RC. On is Memory/Off is no memory

Wired Remote Control Models
Code Consists of Indoor Unit Address Followed by the Fault Code Below.
No E denotes no fault.
OO ID to RC Comms Fail
O1 ID to OD Comms Fail
O2 ID Air Sensor Open
O3 ID Air Sensor Close
O4 ID Pipe Sensor Open
O5 ID Pipe Sensor Close
O6 OD Pipe Sensor Fail
O8 Power Source Connection Failure
O9 Drain Problem
OA OD Air Sensor Fail
OC Discharge sensor Fail
OE Outdoor High Pressure
11 OD PCB Fail
12 ID Fan Fail
13 OD Signal Abnormal
14 OD EEPROM Fail
15 Compressor Temp Failure
16 Pressure Switch Error
17 IPM Error
18 CT Error
19 Active Filter Module Error
1A Compressor Failure
1B OD Fan Failure
1C Inverter to PCB Comms Fail
1D 2 Way Valve sensor Fail
1E Expansion Valve Error
1F Connection ID Unit Error

Outdoor PCB Fault Codes
Inverter OD Unit PCBs (1 red LED)

OD PCB LED Pulses = 1
Models 9-30 = Comms Failure
Models 36-54 = Comms Failure

OD PCB LED Pulses = 2
Models 9-30 = Disch Sensor Fail
Models 36-54 = Disch Sensor Fail

OD PCB LED Pulses = 3
Models 9-30 = Pipe Sensor Fail
Models 36-54 = Pipe Sensor Fail

OD PCB LED Pulses = 4
Models 9-30 = Air Sensor Fail
Models 36-54 = Air Sensor Fail

OD PCB LED Pulses = 5
Models 9-30 = 2 Way Valve Sensor
Models 36-54 =

OD PCB LED Pulses = 6
Models 9-30 = 3 Way Valve Sensor
Models 36-54 =

OD PCB LED Pulses = 7
Models 9-30 = Compressor Thermistor
Models 36-54 = Compressor Thermistor

OD PCB LED Pulses = 8
Models 9-30 = Pressure Switch
Models 36-54 = Heat Sink Sensor Fail

OD PCB LED Pulses = 9
Models 9-30 = Indoor Comms Error
Models 36-54 = Pressure Switch

OD PCB LED Pulses = 10
Models 9-30 = Current Trip
Models 36-54 =

OD PCB LED Pulses = 11
Models 9-30 = CT Fail
Models 36-54 =

OD PCB LED Pulses = 12
Models 9-30 = Compressor Position Fail
Models 36-54 = IPM Error

OD PCB LED Pulses = 13
Models 9-30 = Compressor Start Fail
Models 36-54 = Compressor Position Fail

OD PCB LED Pulses = 14
Models 9-30 = Timer Failure
Models 36-54 = Compressor Start Fail

OD PCB LED Pulses = 15
Models 9-30 =
Models 36-54 = OD Upper Fan Fail

OD PCB LED Pulses = 16
Models 9-30 =
Models 36-54 = OD Lower Fan Fail

OD PCB LED Pulses = Slow Blink
Models 9-30 =
Models 36-54 = Protect Operation

Non Inverter OD PCBs (2 red LEDs)

LED1 = Blinks
LED2 = Blinks
OD PCB Fail

LED1 = 1 Pulse
LED2 = Lit
Power Source Failure

LED1 = 2 Pulse
LED2 = Lit
OD Disch Temp Sensor

LED1 = 3 Pulse
LED2 = Lit
OD Pipe Sensor

LED1 = 4 Pulse
LED2 = Lit
OD Air Sensor

LED1 = 5 Pulse
LED2 = Lit
Comms Failure

LED1 = 6 Pulse
LED2 = Lit
Indoor Unit Error

LED1 = 7 Pulse
LED2 = Lit
High Discharge Temp

LED1 = 8 Pulse
LED2 = Lit
High Pressure

LED1 = 9 Pulse
LED2 = Lit
Compressor Temp Abnormal

LED1 = 10 Pulse
LED2 = Lit
Compressor Temp Sensor Fail


Inverter Multi AOY30
This has 4 LEDs A,B, C & D to denote which circuit has the fault
Up to 8 flashes - faults are identical to above 9-30 Single System

9 Pressure Switch A
10 Pressure Switch B
11 Indoor Unit Indexing Problem
12 IPM Fail
13 Compressor Position Fail
14 Compressor Fail
15 OD Fan Upper Fail
16 OD Fan Lower Fail
17 PCB Fail

Interconnecting Wiring

CO Multis 2 (Live) 1 (Neutral) 3 (Comms)
HP Multis 1 (Live) 2 (Neutral) 3 (Comms)
AOY90T 3 (Live) 2 (Neutral) 1 (Comms)
ALL OTHERS 1 or L 2 or N 3

We recommend external pumps have their own power supply.
Taking Power for a pump from the unit is a major source of Errors (CLIMATE CENTRE)


Pipework
• Pipe sizes and lengths should be as the relevant Technical Guide
• Both lines should be insulated
• No line accessories or oil traps should be fitted
• In cooling mode both pipes should be between 0 and 10C - the suction line should sweat, but not freeze
• In heating moded both pipes should be between 30 an 60C
• Pipework should be refrigeration quality
• Refrigerant should be R22, unless stated on the outdoor unit
• Look for restrictions. They could cause compressor failures.
Outdoor Unit
• Discharge temperature should be between 50 & 70C
• Suction temperature should be between -3 & 4C
• If fan switches off check for high discharge temperature
• Check Suction Line is sweating – problem if not!
• Hot Recip. Compressor = PROBLEM!
• Sweating/Frost on expansion line – undercharged
Indoor Unit
• Is it level? Have we adequate drainage?
• Smells are always due to site conditions or drains
• Flashing lights? = Fault Diagnostics - see over
• When were the filters last cleaned?
• Is the unit too large/small (between 5/20 air circs / hr)
• Is it on Timer/Test Mode
Controller
• EE:EE on LCD handset - fault diagnostics - see over
• Is the handset too far away?
• When were the batteries changed last?
• Heat Pump models 7-14 – NOT auto changeover
• Timer is one shot, unless it has ‘repeat’ mode
• With wired handset, check for interference. Cable should be screened
• Is it on Timer/Test Mode
Wiring
• In general interconnecting wiring is 240 Volt, but see chart for details
• With LCD wired handset models, Terminal 3 is the Live Not Terminal 1
NEVER apply mains voltage to Terminal 1 on these models
• With LCD wired handset models wiring should be screened
• Check Voltage drops! Check it isn’t down to Earth!
• Has it got a timeclock/BMS interface?
• Interconnecting cables MUST be circular crimped

What the separate Wires do in the interconnecting Cables
Note – Wires are 240V Live except where marked neutral or Earth or signal
Cables marked Signal are digital pulses and you should not attempt to measure these with a meter.


Wired Controllers - Fault diagnostics
A Fault Condition is signalled by EE:EE appearing on the LCD panel.
The unit should be interrogated by switching it off on the handset then
pressing either the down arrows on the SET TIME and TEMP/DAY buttons
together for 3 seconds for 7 day models or the ENERGY SAVE & ZONE
CONTROL buttons for other models.
The Failure code is in 2 parts - Fault and Address.
The Fault Code is an E code. The second is the unit address for multi
linked systems - with single units this is always 00. 7 day models have the
fault code as shown in the table below above the address.
Other models have the codes below, minus the 0, followed by the address
- e.g. E9:00 denoting Float Switch on Unit 0.

Code = E:0
Fault = I/U - R/C Comms
Diagnosis = Check R/C wiring. Interference?

Code = E:01
Fault = I/U - O/U Comms
Diagnosis = Check intercon. wiring. Interference

Code = E:02
Fault = Room Sensor Open
Diagnosis = Sensor Missing

Code = E:03
Fault = Room Sensor Short
Diagnosis = Sensor Faulty

Code = E:04
Fault = I/U Pipe Sensor Open
Diagnosis = Sensor Missing

Code = E:05
Fault = I/U Pipe Sensor Short
Diagnosis = Sensor Faulty

Code = E:06
Fault = O/U Pipe Sensor Open
Diagnosis = Sensor Missing

Code = E:07
Fault = O/U Pipe Sensor Short
Diagnosis = Sensor Faulty

Code = E:08
Fault = Power Source Error
Diagnosis = Incorrect Power Supply

Code = E:09
Fault = Float Switch
Diagnosis = Check Drains - High Water Level

Code = E:0A
Fault = O/U Air Sensor Open
Diagnosis = Sensor Missing

Code = E:0C
Fault = Disch Sensor Open
Diagnosis = Sensor Missing

Code = E:0D
Fault = Disch Sensor Short
Diagnosis = Sensor Faulty

Code = E:0F
Fault = High Disch Temp
Diagnosis = Contamination In Pipework/Gas Shortage

Code = E:11
Fault = Model Abnormal
Diagnosis = Check PCB compatability

Code = E:12
Fault = Indoor Fan Failure
Diagnosis = Check Fan and Motor

Code = E:13
Fault = O/D Signal Abnormal
Diagnosis = Communications?

Code = E:14
Fault = Outdoor PCB Fail
Diagnosis = PCB Failure

Outdoor Unit with
A fault condition is signified by flashing red LED’s on the the outdoor PCB
if it is equipped with one. Except for multisplits and 2 LED models, the
diagnostics are shown in the table on the right.
For 2 LED models flashing signifies sensor failure and constantly lit
indicates high discharge temperature.

Fault = Signal Failure
LED1 =
LED2 =
LED3 =
LED4 = Flash
LED5 =
LED6 =

Fault = Indoor Unit Failure
LED1 =
LED2 =
LED3 =
LED4 = Flash
LED5 =
LED6 =

Fault = Discharge Sensor Fail
LED1 =
LED2 =
LED3 =
LED4 =
LED5 =
LED6 = Flash

Fault = O/D Pipe Sensor Fail
LED1 =
LED2 =
LED3 =
LED4 =
LED5 = Flash
LED6 = Flash

Fault = O/D Air Sensor Fail
LED1 =
LED2 =
LED3 = Flash
LED4 =
LED5 = Flash
LED6 =

Fault = Power Source Error
LED1 =
LED2 = Flash
LED3 =
LED4 =
LED5 =
LED6 =

Fault = PCB
LED1 = Flash
LED2 = Flash
LED3 = Flash
LED4 = Flash
LED5 = Flash
LED6 = Flash

Fault = PCB Failure
LED1 = *
LED2 = *
LED3 = *
LED4 = *
LED5 = *
LED6 = * All Flashing Very Rapidly

Fault = High Pressure Trip
LED1 = Flash
LED2 =
LED3 =
LED4 =
LED5 =
LED6 =

Fault = Discharge Temp Trip
LED1 =
LED2 = Flash
LED3 =
LED4 =
LED5 =
LED6 =




Unit = All
Code Means:- = Power On
Red = On
Green = Off
Yellow = Off

Unit = All
Code Means:- = Timer Mode
Red = On
Green = On
Yellow = Off

Unit = All
Code Means:- = Louvre On
Red = On
Green = On or Off
Yellow = On

Unit = All
Code Means:- = HP Defrost Cont.
Red = Long pulses
Green = Off
Yellow = Off

Unit = All
Code Means:- = Test
Red = Cont. Pulse
Green = Cont. Pulse
Yellow = Off

Unit = D,E,F
Code Means:- = Power Fail
Red = On
Green = Cont Long
Yellow = Pulses Off

Unit = All
Code Means:- = PCB Failure
Red = Cont. Short Pulse
Green = Cont. Short Pulse
Yellow = Off

Unit = G
Code Means:- = Room Sensor Fault
Red = 1 Short Pulse
Green = Rapid Pulse
Yellow = Off

Unit = A,B,G
Code Means:- = Sensor Fault
Red = 2 Short Pulses
Green = Rapid Pulse
Yellow = Off

Unit = D,E,F
Code Means:- = Room Sensor Open/Fail
Red = 2 Short Pulses
Green = Rapid Pulse
Yellow = Off

Unit = E,F
Code Means:- = Room Sensor Short
Red = 2 Short Pulses
Green = Rapid Pulse
Yellow = Rapid Pulse

Unit = C
Code Means:- = Room Sensor Fault
Red = 3 Short Pulses
Green = Long Pulse
Yellow = Off

Unit = D,E,F
Code Means:- = Pipe Sensor Open
Red = 3 Short Pulses
Green = Rapid Pulse
Yellow = Off

Unit = E,F
Code Means:- = Pipe Sensor Short
Red = 3 Short Pulses
Green = Rapid Pulse
Yellow = Rapid Pulse

Unit = D,E,F
Code Means:- = High Water
Red = 4 Short Pulse
Green = Rapid Pulse
Yellow = Off

Unit = F
Code Means:- = Comms Failure
Red = 5 Short Pulses
Green = Rapid Pulse
Yellow = Off

Unit = G
Code Means:- = High Water
Red = 6 Short Pulses
Green = Rapid Pulse
Yellow = Off

Unit = B,E,F
Code Means:- = Fan Failure
Red = 6 Short Pulses
Green = Rapid Pulse
Yellow = Off

Unit = F
Code Means:- = 3ph Reversal
Red = Rapid Pulse
Green = 2 Short Pulses
Yellow = Off

Unit = C
Code Means:- = Pipe Sensor Fault
Red = Long Pulse
Green = 3 Short Pulses
Yellow = Off

Unit = F OD
Code Means:- = Pipe Sensor Open
Red = Rapid Pulse
Green = 3 Short Pulses
Yellow = Off

Unit = F OD
Code Means:- = Pipe Sensor Short
Red = Rapid Pulse
Green = 3 Short Pulses
Yellow = Rapid Pulse

Unit = F OD
Code Means:- = Temp Sensor Open
Red = Rapid Pulse
Green = 4 Short
Yellow = Pulses Off

Unit = F OD
Code Means:- = Temp Sensor Short
Red = Rapid Pulse
Green = 4 Short Pulses
Yellow = Rapid Pulse

Unit = F
Code Means:- = Discharge Sensor Open
Red = Rapid Pulse
Green = 5 Short Pulses
Yellow = Off

Unit = F
Code Means:- = Discharge Sensor Short
Red = Rapid Pulse
Green = 5 Short Pulses
Yellow = Rapid Pulse

Unit = F
Code Means:- = High/Low Pressure
Red = Rapid Pulse
Green = 6 Short Pulses
Yellow = Off

Unit = F
Code Means:- = High Discharge Temp
Red = Rapid Pulse 7
Green = Short Pulses
Yellow = Off

SENSOR RESISTANCES - Use to Check Thermistors across the range

Sensor At 10C At 20C At 30C
Air Temperature Sensors 20K Ohms 13K Ohms 8K Ohms
Indoor Pipe Sensor 103K Ohms 63K Ohms 40K Ohms
Outdoor Pipe Sensor 10K Ohms 6K Ohms 4K Ohms
Discharge Sensor 646K Ohms 395K Ohms 250K Ohms

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