Error Codes

R22 Error Codes

Q: What do the error codes mean?
A:

Timer indicator on LED display
Error code on digital display
Trouble source
Priority class
Flash 4 times per 8s
E4
PG motor of indoor unit
1
Flash 1 time per 8s
E1
Temperature sensor of air intake
2
Flash 1 time per 8s
E1
Temperature sensor of air intake
2
Flash 1 time per 1s
E2
Temperature sensor of outdoor unit coil
4
E5
Communication error between outdoor and indoor
5
Q: What to do after getting these error codes:
A:
E1 (plastic sensor) /E3 (copper sensor)
  • test resistance value (std: 5k? at 25°C) of sensor – if abnormal, replace with new one
  • check cable connection with PCB
E2
  • Signal cable between indoor and outdoor not connected due to unprofessionalism
  • Outdoor copper sensor broken, resistance infinite – check cable, socket and sensor.
E4
  • Check wire connection of indoor motor then restart appliance
  • If E4 still display, replace PCB.
  • Lastly, check the PG motor of indoor unit.
E5
  • Outdoor

Inverter units

Errors for indoor unit

Error on digital display
Timer indicator on LED display
Trouble source
E1
Flash 1 time in 8s
Indoor room temp sensor
E3
Flash 2 times in 8s
Indoor coil temp sensor
E4
Flash 6 times in 8s
Indoor fan motor feedback
E5
Flash 5 times in 8s
Indoor and outdoor communication
E6
Indoor E1PROM
E7
100Hz overzero detect failure

Error for outdoor units

Error on display
Trouble source
F0
Temp sensor of compressor or overheat switch protection
F1
Outdoor temp sensor
F2
Discharge temp sensor
F3
Outdoor coil temp sensor
F4
Overheat protection/discharge temp
F5
Outdoor E2PROM
F6
Module IPM
F7
Protection of bus current
F8
Module PFC
Q: What happens when certain LED lights are on?

LED
causes
Error on control board
1
Outdoor Temp sensor failure
001
2
Outdoor coil temp sensor
002
1,2
Compressor discharge temp sensor
003
3
General back temp sensor
009
1,3
Outdoor A back temp sensor
010
2,3
Outdoor B back temp sensor
011
4
Over/under voltage
006
1,2,3
Over current
006
4
Over current
005
1,4
Module abnormal
004
2,4
Compressor overheat
007
1,2,4
EEPROM abnormal
008
 
Refrigerant leak
012
 
Four-way valve switch
013
 
Compressor discharge overheat
014
 
Current mutual induction
015
Q: What happens when certain LED lights are flashing?

1
Outdoor A overcooling/heating
2
Outdoor B overcooling/heating
1,2
Current protection
3
Discharge protection
1,3
Voltage protection
2,3
Refrigeration overload

Cassettes, under ceilings, ducts


Q: What do the error indications mean?
A:

Indication lamp on display
Failure lamp on display
Error code on controller
Phenomenon
Cause
Priority
Flash 5 times in 2s
Flash 2 times in 2s
F1
Shutdown
Communication
1
E5
Shutdown
Wired controller communication
1
Flash 4 times in 2s
E4
Shutdown
Drainage system
3
Flash 6 times in 2s
E6
Shutdown
Outdoor protection (Phase failure)
2
Flash 10 times in 2s
Flash 10 times in 2s
EA
Shutdown
Outdoor protection (discharging over-temperature)
10
Flash 9 times in 2s
Flash 1 times in 2s
E9
Shutdown
High pressure protection
6
Flash 9 times in 2s
Flash 3 times in 2s
E9
Shutdown
Low pressure protection
6
Flash 1 times in 2s
E1
Shutdown
Indoor temp sensor
4
Flash 3 times in 2s
E3
Shutdown
Indoor coil sensor
5
Flash 2 times in 2s
Flash 2 times in 2s
E2
Non Stop
Outdoor coil sensor
8
Flash 7 times in 2s
Flash 7 times in 2s
E7
Non Stop
Outdoor condensate temp sensor
9
Flash 8 times in 2s
Flash 8 times in 2s
E8
Non Stop
Discharging temp sensor
10