Interpretation of Universal Air Conditioner Error Codes

AC Type Error Code Code Explanation
Daikin A1 Malfunction of indoor unit PCB Malfunction due to noise Defect of indoor unit PCB. 
Malfunction of indoor unit PCB due to noise, defect of indoor unit PCB.
A3 Malfunction of drain level control system Drain piping clogging, improper drain piping work Defect of drain pump. Defect of float switch. 
Malfunction of drain level control system, drain piping clogging, improper drain piping work, defect of drain pump. Defect of float switch.
A4 Malfunction of freezing protection Shortage of water volume Low water temperature setting Defect of 26WL. Defect of water temperature thermistor. 
Malfunction of freeze protection, insufficient water volume, low water temperature setting, 26WL defect. Defect of water temperature thermistor.
A5 High pressure control in heating, freeze-up protection control in cooling Clogged air filter of indoor unit and short-circuit Defect of indoor unit heat exchanger thermistor. 
High pressure control in heating, freeze-up protection control in cooling. Clogged indoor unit air filter and short circuit. Defect of indoor unit heat exchanger thermistor.
A6 Fan motor locked, overload, overcurrent Defect of connector contact Defect of indoor unit PCB Defect of fan motor. 
Fan motor locked, overload, overcurrent. Defect of connector contact. Defect of indoor unit PCB. Defect of fan motor.
A7 Malfunction of swing flap motor Failure of swing flap motorm, Defect of indoor unit PCB Jammed swing mechanism/blade. 
Malfunction of swing flap motor. Failure of swing flap motor, defect of indoor unit PCB, jammed swing mechanism/blade.
A8 Malfunction of power supply Overcurrent of AC input, Defect of power supply voltage. 
Malfunction of power supply. Overcurrent of AC input, defect of power supply voltage.
A9 Malfunction of electronic expansion valve drive Defect of electronic expansion valve coil, Defect of indoor unit PCB, Defect of connector contact. 
Malfunction of electronic expansion valve drive. Defect of electronic expansion valve coil, defect of indoor unit PCB, defect of connector contact.
AA Heater overheat 26WH is activated. 
Heater overheat 26WH is activated.
AF Malfunction of a humidifier system Water leakage of humidifier (option), Failure of swing float switch. Improper drain piping incline. 
Malfunction of humidifier system. Water leakage from humidifier (optional), failure of swing float switch. Improper drain piping incline.
AH Malfunction of dust collector of air cleaner Defect of dust collecting element Defect of high voltage power supply unit Stained insulator part Defect of indoor unit PCB. 
Malfunction of air cleaner dust collector. Defect of dust collecting element. Defect of high voltage power supply unit. Stained insulator part. Defect of indoor unit PCB.
AJ Malfunction of capacity setting (Indoor unit PCB) Capacity setting adaptor is not installed when replacing PCB Defect of indoor unit PCB. 
Malfunction of capacity setting (Indoor unit PCB). Capacity setting adapter not installed when replacing PCB. Defect of indoor unit PCB.
C1 Failure of transmission (between indoor unit PCB and fan PCB) Defect of transmission of fan motor control driver. 
Failure of transmission (between indoor unit PCB and fan PCB). Defect of transmission of fan motor control driver.
C4 Malfunction of liquid pipe thermistor for heat exchanger Defect of connector contact. Defect of liquid pipe thermistor for heat exchanger. 
Malfunction of liquid pipe thermistor for heat exchanger. Defect of connector contact. Defect of liquid pipe thermistor for heat exchanger.
C5 Malfunction of gas pipe thermistor for heat exchanger Defect of connector contact. Defect of gas pipe thermistor for heat exchanger.
Malfunction of gas pipe thermistor for heat exchanger. Defect of connector contact. Defect of gas pipe thermistor for heat exchanger.
C6 Malfunction of fan motor control driver Defect of fan motor sensor system Defect of fan motor control driver. 
Malfunction of fan motor control driver. Defect of fan motor sensor system. Defect of fan motor control driver.
C7 Front panel driving motor fault Defect of front panel driving motor Defect of limit switch. 
Front panel driving motor fault. Defect of front panel driving motor. Defect of limit switch.
C9 Malfunction of suction air thermistor Defect of connector contact Defect of thermistor for suction air. 
Malfunction of suction air thermistor. Defect of connector contact. Defect of thermistor for suction air.
CA Malfunction of discharge air thermistor Defect of connector contact. Defect of thermistor for discharge air. 
Malfunction of discharge air thermistor. Defect of connector contact. Defect of thermistor for discharge air.
CC Malfunction of humidity sensor system Defect of connector contact Defect of humidity sensor.
Malfunction of humidity sensor system. Defect of connector contact. Defect of humidity sensor.
Midea E0 EEPROM parameter error
EEPROM parameter error
E1  Indoor / outdoor units communication protection 
Indoor/outdoor units communication protection
E2 Zero-crossing signal error 
Zero-crossing signal error
E3 Fan speed out of control 
Fan speed out of control
E5 Open or short circuit of outdoor temperature sensor 
Open or short circuit of outdoor temperature sensor
E6 Open or short circuit of room or evaporator temperature sensor 
Open or short circuit of room or evaporator temperature sensor
P0 IGBT over-strong current protection 
IGBT over-strong current protection
P1 Over voltage or too under voltage protection 
Overvoltage or undervoltage protection
P2 Temperature protection of compressor top. 
Compressor top temperature protection.
P4 Inverter compressor drive error
Inverter compressor drive error
YORK E0 Indoor EEPROM (Electrically Erasable Programmable Read-Only Memory) error 
Indoor EEPROM (Electrically Erasable Programmable Read-Only Memory) error
E1 Indoor and outdoor unit communication malfunction 
Indoor and outdoor unit communication malfunction
E3  Indoor fan speed malfunction 
Indoor fan speed malfunction
E4 Indoor room temperature sensor error 
Indoor room temperature sensor error
E5 Evaporator coil temperature sensor error 
Evaporator coil temperature sensor error
EC Refrigerant leak detection system malfunction 
Refrigerant leak detection system malfunction
EE Water level alarm malfunction 
Water level alarm malfunction
E8 Dual indoor unit (twin model only) communication malfunction 
Dual indoor unit (twin model only) communication malfunction
E9 Other twin model malfunction 
Another twin model fault
E0 Overload protection 
Overload protection
F1 Outdoor temperature sensor error 
Outdoor temperature sensor error
F2 Outdoor condenser pipe sensor error 
Outdoor condenser pipe sensor error
F3  Discharge air temperature sensor error 
Discharge air temperature sensor error
F4 Outdoor EEPROM (Electrically Erasable Programmable Read-Only Memory) error 
Outdoor EEPROM (Electrically Erasable Programmable Read-Only Memory) error
F5 Outdoor fan speed (DC fan motor only) malfunction 
Outdoor fan speed (DC fan motor only) malfunction
F6 T2b sensor error 
T2b sensor error
F7 Auto-lifting panel communication error 
Auto-lifting panel communication error
F8 Auto-lifting panel malfunction 
Auto-lifting panel malfunction
F9  Auto-lifting panel is open 
Auto-lifting panel is open
P0 Inverter module IPM protection 
Inverter module IPM protection
P1 High/Low voltage protection 
High/low voltage protection
P2 Compressor top overheating protection 
Compressor top overheating protection
P3 Outdoor low temperature protection 
Outdoor low temperature protection
P4 Compressor drive error 
Compressor drive error
P5 Mode conflict 
Mode conflict
P6 Compressor low-pressure protection 
Compressor low-pressure protection
P7 Outdoor IGBT sensor error
Outdoor IGBT sensor error
AUX E1 Plastic temp sensor is abnormal. 
Plastic temp sensor is abnormal.
E2 Copper temp sensor is abnormal (outdoor)
Copper temp sensor is abnormal (outdoor)
E3 Copper temp sensor is abnormal (indoor)
Copper temp sensor is abnormal (indoor)
E4 PG motor feedback is abnormal
PG motor feedback is abnormal
E5 Abnormality of outdoor unit
Abnormality of outdoor unit
E6 Over-current oprotection
Over-current protection
E7 External feedback failure
External feedback failure
E8 Overheat protection
Overheat protection
E9 Water pump failure
Water pump failure
dF Indicates "dF"or defrosting indicator displays
Indicates "dF" or defrosting indicator displays
L1 Failure of coiled pipe sensor
Coiled pipe sensor failure
L2 Failure of room temperature sensor
Room temperature sensor failure
L6 Without feedback of internal fan motor
No feedback from internal fan motor
BEKO H1 Means defrosting status. It's the normal phenomenon.
Means defrosting status. It's a normal phenomenon.
E5 It can be eliminated after restarting the unit. If not, please contact qualified professionals for service.
It can be eliminated after restarting the unit. If not, please contact qualified professionals for service.
U8 It can be eliminated after restarting the unit. If not, please contact qualified professionals for service.
It can be eliminated after restarting the unit. If not, please contact qualified professionals for service.
H6 It can be eliminated after restarting the unit. If not, please contact qualified professionals for service.
It can be eliminated after restarting the unit. If not, please contact qualified professionals for service.
C5 Please contact qualified professionals for service.
Please contact qualified professionals for service.
F1 Please contact qualified professionals for service.
Please contact qualified professionals for service.
F2 Please contact qualified professionals for service.
Please contact qualified professionals for service.
Carrier E0 Indoor unit EEPROM parameter error
Indoor unit EEPROM parameter error
E1 Indoor / outdoor units communication error
Indoor/outdoor units communication error
E3 Indoor fan speed has been out of control
Indoor fan speed has been out of control
E4 Indoor room temperature sensor T1 open circuit or shortcircuit
Indoor room temperature sensor T1 open circuit or short circuit
E5 Evaporator  coil  temperature  sensor  T2  open  circuit  or short circuit
Evaporator coil temperature sensor T2 open circuit or short circuit
EC Refrigerant Leakage Detection
Refrigerant Leakage Detection
F1 Outdoor  ambient  temperature  sensor  T4  open  circuit  or short circuit
Outdoor ambient temperature sensor T4 open circuit or short circuit
F2 Condenser  coil  temperature  sensor  T3  open  circuit  or short circuit
Condenser coil temperature sensor T3 open circuit or short circuit
F3 Compressor discharge temperature sensor T5 open circuit or short circuit
Compressor discharge temperature sensor T5 open circuit or short circuit
F4 Outdoor unit EEPROM parameter error
Outdoor unit EEPROM parameter error
F5 Outdoor fan speed has been out of control
Outdoor fan speed is out of control
P0 IPM malfunction or IGBT over-strong current protection
IPM malfunction or IGBT over-current protection
P1 Over voltage or over low voltage protection
Overvoltage or undervoltage protection
P2 High temperature protection of compressor top diagnosis and solution
High temperature protection of compressor top diagnosis and solution
P4 Inverter compressor drive error
Inverter compressor drive error
P5 Mode conflict
Mode conflict
P6 Compressor voltage protection
  Compressor voltage protection
Chigo E1 Condenser temperature sensor fault
Condenser temperature sensor fault
E2 Room temp. sensor fault
Room temperature sensor fault
E3 Coil temp. sensor fault
Coil temperature sensor fault
E4 Outdoor unit abnormal
Outdoor unit abnormal
E5 No feedback signal of indoor fan
No feedback signal from indoor fan
E6 No over zero signal
No over zero signal
E7 Outdoor feedback fault
Outdoor feedback fault
E8 Frost protection/over heat protection
Frost protection/overheat protection
F1  Communication fault
Communication fault
F2 Ambient temp. sensor fault
Ambient temperature sensor fault
F3 Coil pipe temp. sensor of indoor unit fault
Indoor unit coil pipe temperature sensor fault
F4 Fan motor of indoor
Indoor fan motor
F5  Module of outdoor unit fault
Outdoor unit module fault
F6 Ambient temp. sensor of outdoor fault
Outdoor ambient temperature sensor fault
F7 Coil pipe temp. sensor of outdoor unit fault
Outdoor unit coil pipe temperature sensor fault
F8 Suction temp. sensor of compressor fault
Compressor suction temperature sensor fault
F9 Discharge temp. sensor of compressor fault
Compressor discharge temperature sensor fault
FA Inductor of current or voltage fault
Current or voltage inductor fault
FC  Compressor drive fault
Compressor drive fault
FD Phase lacking or phase sequence fault
Phase loss or phase sequence fault
FE Gas return sensor fault
Gas return sensor fault
FF  Other fault
Other fault
P1 Temp. of evaporator protection
Evaporator temperature protection
P2 Overheat, over current protection of inverter module
Overheat, overcurrent protection of inverter module
P3 Over current protection
Overcurrent protection
P4 Discharge temp. of compressor protection
Compressor discharge temperature protection
P5 Over heat of compressor top protection
Overheat protection of compressor top
P6 Suction temp. of compressor protection
Compressor suction temperature protection
P7 Low or high voltage protection
Low or high voltage protection
P8   Low pressure of gas return protection
Low pressure of gas return protection
P9 High pressure of discharge protection
High pressure of discharge protection
PA High temp. of condenser protection
High temperature of condenser protection
PC   High temp. of outdoor ambient protection
High temperature of outdoor ambient protection
PF Other protection
Other protection
DF Defrost indication
  Defrost indication
Delonghi LE Low Temperature (frost prevention). The appliance is fitted with a frost protection device to avoid excessive formation of ice. The appliance starts up again automatically when the defrosting process is completed.
Low Temperature (frost prevention). The appliance is fitted with a frost protection device to avoid excessive formation of ice. The appliance starts up again automatically when the defrosting process is completed.
HL High Level (internal tray full). Empty the internal safety tray following the instructions in the section “End of season operations”. If it reoccurs in cooling mode, contact your local authorised customer services. In heating mode: empty the internal tray.
High level (internal safety tray is full). Empty the internal safety tray by following the instructions in the “End of Season Operations” section. If this recurs in cooling mode, contact local authorised customer services. In heating mode: Empty the internal tray.
CF Change filter. When this message is displayed, the water filter needs replacing as described in the section: “Replacing the limescale filter”.
Change filter. When this message is displayed, the water filter needs replacing as described in the section: “Replacing the limescale filter”.
PF Probe Failure (sensor damaged). If this is displayed, contact your local authorised service centre.
Probe Failure (sensor damaged). If this is displayed, contact your local authorised service centre.
F1 Failure 1. This message could appear if the water filter is particularly clogged. See section: “Replacing the limescale filter”. If the filter has been replaced recently, contact your local authorised service centre.
Failure 1. This message could appear if the water filter is particularly clogged. See section: “Replacing the limescale filter”. If the filter has been replaced recently, contact your local authorised service centre.
Lo Low Temperature - Room temperature is too low.
Low Temperature - Room temperature is too low.
H1 High Temperature - Room temperature is too high.
High Temperature - Room temperature is too high.
E1 Probe Failure ( Sensor Damaged).
Probe Failure (Sensor Damaged).
Fujitsu E0:00 Coms error - indoor to remote
Coms error - indoor to remote
E1:00 Coms error - indoor to outdoor
Coms error - indoor to outdoor
E2:00 Return air thermistor open circuit
Return air thermistor open circuit
E3:00 Return air thermistor short circuit
Return air thermistor short circuit
E4:00 Indoor coil thermistor open
Indoor coil thermistor open
E5:00 Indoor coil thermistor shorted
Indoor coil thermistor shorted
E6:00 Outdoor coil thermistor open
Outdoor coil thermistor open
E7:00 Outdoor coil thermistor shorted
Outdoor coil thermistor shorted
EA:00 Outdoor ambient thermistor open
Outdoor ambient thermistor open
Eb:00 Outdoor ambient thermistor shorted
Outdoor ambient thermistor shorted
Ec:00 Discharge pipe themistor open
Discharge pipe thermistor open
Ed:00 Discharge pipe thermistor shorted
Discharge pipe thermistor shorted
EE:00 High Pressure problem
High Pressure problem
EF:00 Discharge pipe temp. Problem - too high = short of gas
Discharge pipe temp. Problem - too high = short of gas
OO ID to RC Comms Fail
ID to RC Comms Fail
O1 ID to OD Comms Fail
ID to OD Comms Fail
O2 ID Air Sensor Open
ID Air Sensor Open
O3 ID Air Sensor Close
ID Air Sensor Close
O4 ID Pipe Sensor Open
ID Pipe Sensor Open
O5 ID Pipe Sensor Close
ID Pipe Sensor Close
O6 OD Pipe Sensor Fail
OD Pipe Sensor Fail
O8 Power Source Connection Failure
Power Source Connection Failure
O9 Drain Problem Float switch operated
Drain Problem Float switch operated
OA OD Air Sensor Fail
OD Air Sensor Fail
OC Discharge sensor Fail
Discharge sensor Fail
OE Outdoor High Pressure Heatsink error
Outdoor High Pressure Heatsink error
11 OD PCB Fail
OD PCB Fail
12 ID Fan Fail
ID Fan Fail
13 OD Signal Abnormal ID signal error
OD Signal Abnormal ID signal error
14 OD EEPROM Fail
OD EEPROM Fail
15 Compressor Temp Failure
Compressor Temp Failure
16 Pressure Switch Error
Pressure Switch Error
17 IPM Error
IPM Error
18 CT Error
CT Error
19 Active Filter Module Error
Active Filter Module Error
1A Compressor Failure
Compressor Failure
1B OD Fan Failure
OD Fan Failure
1C Inverter to PCB Comms Fail
Inverter to PCB Comms Fail
1D 2 Way Valve sensor Fail
2 Way Valve sensor Fail
1E Expansion Valve Error
Expansion Valve Error
1F Connection ID Unit Error
Connection ID Unit Error
20 Indoor manual switch abnormal
Internal manual switch abnormal
24 Excessive high pressure protection on cooling
Excessive high pressure protection on cooling
25 PFC circuit error
PFC circuit error
26 Indoor signal error
Indoor signal error
27 Indoor signal error
Indoor signal error
28 Indoor heat exchanger temperature error
Indoor heat exchanger temperature error
29 Outdoor heat exchanger temperature (middle) error
Outdoor heat exchanger temperature (middle) error
2A Power supply frequency detection error
Power supply frequency detection error
2B Compressor temperature error
Compressor temperature error
2C Four-way valve abnormal
Four-way valve abnormal
General 01 Indoor unit doesn’t accept signal from outdoor unit
Indoor unit does not accept signal from outdoor unit
02 Room temperature sensor open
Room temperature sensor open
03 Room temperature sensor short-circuited
Room temperature sensor short-circuited
04 Indoor heat exchanger temperature sensor open
Indoor heat exchanger temperature sensor open
05 Indoor heat exchanger temperature sensor short circuited
Indoor heat exchanger temperature sensor short-circuited
06 Outdoor heat exchanger temperature sensor
Outdoor heat exchanger temperature sensor
08 Power source connection error
Power source connection error
09 Float switch operated
Float switch operated
0A Outdoor temperature sensor error
Outdoor temperature sensor error
0c Discharge pipe temperature sensor
Discharge pipe temperature sensor
11 Model abnormal/Indoor EPROM Abnormal
Model abnormal / Indoor EPROM abnormal
12 Indoor fan abnormal
Indoor fan abnormal
13 Outdoor unit doesn’t accept the signal from indoor unit
Outdoor unit does not accept the signal from indoor unit
14 Excessive outdoor pressure (permanent stop)
Excessive outdoor pressure (permanent stop)
15 Compressor temperature sensor
Compressor temperature sensor
16 Pressure switch error
Pressure switch error
17 IPM error
IPM error
18 CT error
CT error
19 Active filter module (AFM) error
Active filter module (AFM) error
1A Compressor does not operate
Compressor does not operate
1b Outdoor unit fan error
Outdoor unit fan error
1c Communication error (inverter to multi controller)
Communication error (inverter to multi controller)
1d 2 way valve sensor error
2-way valve sensor error
1E Expansion valve error
Expansion valve error
1F Connection indoor unit error
Indoor unit connection error
GE E0 On 70 Pint models only - when water is not pumped out while the unit is running under the Pump mode, E0 and the pump light will flash on the display.
E1 Electronic control board function error. Unplug the window air conditioner for 1 minute and then plug it back in to reset the electronic control board. If the code doesn’t clear, unplug the window air conditioner and check the wire harness connections on the electronic control board. Check the electronic control board for visible damage such as a burn mark. Replace the electronic control board if it’s damaged or defective.
E4 Water bucket is full or defective bucket float switch. If the collection bucket is full, empty the bucket. If the bucket isn’t full, unplug the air conditioner and check the wire harness connections on the electronic control board. Check for a pinched or damaged wire in the wire harness between the electronic control board and the collection bucket float switch. Check the float switch for damage. If the float switch is defective, replace it.
88 When power is connected to the unit, "88" will be displayed, this is normal. If a fault or error code appears on the display of the dehumidifier, disconnect power to the unit for 30 seconds. If the fault code reappears, review the Troubleshooting Tips in your Owner's Manual.
Gree E1 Refrigerant system high pressure protection
E2 Anti-freezing protection
E4 Compressor exhaust high temperature protection
E5 AC over-current protection
E6 Communication failure between indoor unit and outdoor unit
E8 Anti-high temperature protection
H6 No feedback of indoor fan motor
C5 Jumper cap malfunction protection
F0 Refrigerant Leakage Protection
F1 Indoor ambient sensor open or short circuit
F2 Indoor tube sensor open or short circuit
F3 Outdoor ambient sensor open or short circuit
F4 Outdoor tube sensor open or short circuit
F5 Exhaust sensor open or short circuit
F6 Over load limit / drop frequency
F8 Over current limit / drop frequency
F9 High exhaust temperature limit / drop frequency
PH Over voltage protection for PN
U5 AC current detect circuit malfunction
U4 Compressor reverse protection
P5 Over compressor phase current protection
b5 Inlet tube sensor malfunction
L3 Outdoor DC fan motor malfunction
b7 Outlet tube sensor malfunction
FC  Door malfunction
FE Compressor overload sensor malfunction
H1 Defrosting
H2 Static clearing dust protection
H3 Compressor over load protection
H4  System abnormal protection
H5 IPM protection
HC PFC protection
H7 Compressor loss step protection
H0 Heating anti-high temperature drop frequency
Lc Startup failure
U2 Compressor protection against loss of phase
U1 Compressor phase current detection circuit malfunction
HE Compressor demagnetization protection
EE Loading EEPROM malfunction
P6 Communication failure between main board and driver board
PU Capacitor charge malfunction
P7 IPM sensor circuit malfunction
P8 IPM high temperature protection
U3 PN voltage drop protection
PL Low PN voltage protection
Pc Current detect circuit malfunction or Current sensor malfunction
Ld Compressor loss of phase protection
LE Compressor locked rotary protection
EU IPM over temperature limit / drop frequency
U7  4-way valve reversal abnormal
U8 Disconnection of the exhaust temperature sensor
U9  AC power zero voltage detect error
FA  Over tube temperature drop frequency
FH  Anti-freezing limit / drop frequency
oE PFC module temperature protection/PFC module sensor malfunction
Haier  E1 Indoor room temperature sensor failure
E2 Indoor coil temperature sensor failure
E4 EEPROM wrong
E7 Communication failure between indoor and outdoor
E14 Indoor fan motor failure
E18 Temperature cutoff protection
F1 Module failure
F2 Outdoor DC motor failure
F4 Compressor overheat / discharging temperature protection
F5 Module over current / current transducer failure
F6 Outdoor ambient temp. sensor abnormal
F7 Outdoor suction/defrosting temp. sensor abnormal
F8 High pressure abnormal
F9 Low pressure abnormal
F10 No AC power supply
F11 Outdoor PCB EEPROM abnormal
F13 Communication failure between outdoor PCB and module
F14 Compressor discharging temp. sensor failure
F15 Compressor running faulty
F16 Running state-detecting circuit failure
Hisense  00 No trouble
01 Outdoor coil temperature sensor in trouble
02 Compressor temperature sensor in trouble
03 Voltage transformer in trouble
04 Current transformer in trouble
05 IPM module protection
06 Over and under-voltage control
07 Communication trouble
08 Current overload control
09 Maximum current control
10 Communication trouble (between outdoor unit and driver unit)
11 Outdoor EEPROM in trouble
13 Compressor exhaust temperature too high control
14 Outdoor ambient temperature sensor in trouble
15 Compressor housing temperature control
16 Anti-freeze or overload control
18 DC compressor fails to start
19 DC compressor out of step
33 Room temperature sensor in trouble
34 Indoor coil temperature sensor in trouble
35 Between wire remote controller and indoor unit communication trouble
36 Communication between the indoor and outdoor in trouble
37 Water overbrimmed the pump
38 Indoor EEPROM in trouble
39 Indoor fan motor operation abnormal
40 Grid protection alarm (cabinet type)
41 Detecting failures by zero-crossing
F0Wire remote controller EEPROM failure. Change wire remote controller.
F1 Wire remote controller temperature sensor failure. Change wire remote controller.
F2 Wire remote controller clock IC failure. Change wire remote controller.
F3 Wire remote controller humidity sensor failure. Change wire remote controller.
FE Communication between main control board & Wiring remote controller Fault (display on wiring remote controller).
ER Communication between main control board &display board Fault.
Hitachi P01 Pressure ratio protection control
P02 High pressure increase protection
P03 Inverter current protection
P04 Inverter fin temperature increase protection
P05 Discharge gas temperature increase protection at the upper part of the compressor
P06 Low pressure decrease protection
P09 High pressure decrease protection
P0A Demand current protection control
P0d Low pressure increase protection
P11 Pressure ratio decrease retry
P12 Low pressure increase retry
P13 High pressure increase retry
P14 Constant speed compressor overcurrent retry
P15 Discharge gas temperature increase retry / Low pressure decrease retry
P16 Discharge gas super-heat decrease retry
P17 Inverter anomaly retry
P18 Abnormal Inverter voltage retry / Inverter failure retry
P26 High pressure decrease retry
LG C1 or CH1 Indoor temperature sensor open or closed circuit.
C2 or CH2 Outdoor temperature sensor open or closed circuit.
C4 or CH4 Heat sink temperature sensor open or closed circuit.
C5 or CH5 Communication between indoor and outdoor units.
C6 or CH6 Excessive current at inverter DC power circuit.
C7 or CH7 Excessive compressor current
C8 or CH8 Indoor fan not rotating.
C9 or CH9 Outdoor fan not rotating.
CA 1. Discharge temp more than130 °C 2. Faulty discharge thermistor
CC EEPROM error
CD Inverter module error
Po System in Power Mode – not a fault
Lo System in test mode – not a fault
Samsung E101 Communication Error (Indoor Outdoor)
E102 Communication Error (Indoor Outdoor)
E121 ROOM TH sensor error
E122 INDOOR MID, INDOOR IN PIPE-TH sensor error
E154 Fan Error (Indoor)
E162 EEPROM Error (Indoor)
E163 Option Error
E203 Time out Comm. (Inv Micom Main Micom)
E221 OUT-TH(Outdoor Temperature) Sensor Error
E231 CON-TH(Cond Temperature) Sensor Error
E251 DIS-TH(Discharge Temperature) Sensor Error
E416 DIS-TH(Discharge Temperature) Over Error
E422 EEV or Valve Close error-Self diagnosis
E440 Prohibit Operation Condition Error (Heating)
E441 Prohibit Operation Condition Error (Cooling)
E458 Fan Error(Outdoor)
E461 Comp Starting Error
E462 AC Input I_Limit Trip Error
E464 IPM Over Current(O.C) Error
E465 Comp V_limit/I_limit Error
E466 DC-Link Voltage Under/Over Error
E467 Comp Wire Missing Error
E468 Current Sensor Error
E469 DC-Link Voltage Sensor Error
E470 EEPROM Data Error (no data)
E471 EEPROM Data Error (Main Micom Inv Micom)
E474 Heatsink Sensor Error
E483 Over Voltage Protection Error
E484 PFC Over Load Error
E485 Input Current Sensor Error
E488 AC Input Voltage Sensor Error
E500 Heatsink Over Temperature Error
E554 Gas Leak Error
Sharp EE Buttons are locked
E0 Water pump malffunction
E1 High pressure protection of compressor
E2 Indoor anti-frozen of compressor
E3 Low pressure protection of compressor
E4 Air discharge high-temperature protection of compressor
E5 Overload protection of compressor
E6 Transmit malfunction
E8 Indoor fan protection
E9 Water flow protection
FF Connected control communications Failure
F0 Malfunction of indoor environment sensor at air return vent
F1 Evaporator sensor malfunction
F2 Condenser sensor malfunction
F3 Outdoor environment sensor malfunction
F4 Malfunction of air discharge sensor
F5 Malfunction of environment sensor on displayer
ee Malfunction of outdoor drive memory chip. Outdoor drive board.
H3 Compressor over load protection. Compressor overload switch.
H4 Overload protection. Evaporator temperature, condenser temperature.
H6 Malfunction of outdoor fan motor. Outdoor fan motor.
U7 Direction changing malfunction of 4-way valve.
P6 Communicatio n malfunction between main control and drive.
EE Malfunction of outdoor main control memory chip. Outdoor main control board.
TCL E0 Indoor/outdoor communication fault
EC Outdoor communication fault
E1 Room temperature sensor (IRT)
E2 Indoor pipe (coil) temperature sensor (IPT)
E3 Outdoor pipe (coil) temperature sensor (OPT)
E4 System abnormal
E5 Model configuration wrong
E6 Indoor fan motor fault
E7 Outdoor temperature sensor
E8 Exhaust temperature sensor
E9 Intelligent power module of drive and module fault
EF Outdoor fan motor fault (DC Motor)
EA Current sensor fault
EE EEPROM fault
EP Temperature switch fault (on top of the compressor)
EU Voltage sensor fault
EH Intake temperature sensor
P1 Overvoltage / undervoltage protection
P2 Overcurrent protection
P4 Exhaust overtemperature protection
P5 Subcooling protection under cooling mode
P6 Overheating protection under cooling mode
P7 Overheating protection under heating mode
P8 Outdoor overtemperature / undertemperature protection
P9 Drive protection (software control )
P0 Module protection (hardware control)
Toshiba E01 No communication between remote controller and indoor unit.
E02 Local controller failure - unable to transmit
E03 Master indoor unit receives no data to A-B
E04 Indoor unit (except twin slave) receives no communications from outdoor unit; can also include klixon on discharge pipe of outdoor unit
E08 Duplicated indoor unit address
E09 2 local controllers connected on a group - both configured as masters
E10 Indoor unit PSB failure
E18 Communications failure between master indoor unit and slave indoor unit or units
F01 Indoor unit TCJ (Liquid) sensor error (Open or Closed circuit - resistance is measured in kΩ
F02 Indoor unit TC2 (Vapour) sesnor error (Open or Closed circuit - resistance is measured in kΩ
F04 Outdoor unit TD (Discharge) sesnor error (Open or Closed circuit - resistance is measured in kΩ
F06 Outdoor unit TE (Coil) sesnor error (Open or Closed circuit - resistance is emasured in kΩ
F08 Outdoor unit TO (Ambient) sesnor error (Open or Closed circuit - resistance is measured in kΩ
F10 Indoor unit TA (Return Air) sesnor error )Open or Closed circuit - resistance is measure in kΩ
F29 Indoor unit PCB failure
H01 Outdoor unit inverter compressor over current detected
H02 Master outdoor unit over current detected shortly after start up
H03 Current detected on Master outdoor unit whilst idle
H06 Outdoor unit Low pressure detected by Ps sensor (0.2 bar -n 2.9 psig)
L03 Indoor unit Duplicated master indoor units in a group
L07 Indoor unit in a group of units previously addressed as a single unit - check addressing
L08 Indoor units addresses not set - check addressing
L09 Indoor units capacity not set (check DN Code 11)
L29 Outdoor unit IPDU error (Number of detected IPDU units is reduced)
L30 Input on indoor PCB CN80 circuit for 1 minute
L31 Outdoor unit PCB error
P01 Indoor unit fan motor error
P03 Outdoor unit High discharge temperature (TD1 exceeded 115°C)
P04 Outdoor unit High pressure switch activated (Detected by high temperature on TE sensor on digital/super digital inverter units)
P07 Outdoor unit PCB heat sink overheated (Temperature over 90°C recorded)
P10 Indoor unit Float switch activated
P12 Indoor unit fan motor error - detected by feedback circuit
P19 Wrong change in temperature recorded (4 way valve error)
P22 Outdoor unit fan motor IPDU error
P26 Outdoor unit Giant transistor short circuit
P29 Outdoor unit Compressor error detected by feedback circuit
P30 Indoor unit Group control follower unit error / duplicated central control addresses
P31 Indoor unit PCB error
C05 Central control Sending error in TCC-Link central control device
C06 Central control Receive error in TCC-Link central control device
C12 Batch alarm for general purpose equipment interface
Westinghouse  E0 Indoor unit EEPROM parameter error.
E1 Indoor / outdoor units communication error.
E2 Zero-crossing signal detection error.
E3 Indoor fan speed has been out of control.
E4 Open circuit or short circuit of indoor room temperature T1 sensor.
E5 Open circuit or short circuit of evaporator coil temperature T2 sensor
EC Refrigerant Leakage Detection
F1 Open circuit or short circuit of outdoor ambient T4 temperature sensor
F2 Open circuit or short circuit of condenser coil temperature T3 sensor
F3 Open circuit or short circuit of compressor discharge T5 temperature sensor
F4 Outdoor unit EEPROM parameter error
P0 IPM malfunction or IGBT over-strong current protection
P1 Over voltage or over low voltage protection
P2 High temperature protection of compressor top diagnosis and solution
P4

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