Service Guide

 Troubleshooting 4 
2. General Troubleshooting
2.1 Error Display (Indoor Unit)
When the indoor unit encounters a recognized error, the operation lamp will flash in a corresponding series, the timer
lamp may turn on or begin flashing, and an error code will be displayed. These error codes are described in the following
table:
Operation
Lamp
Timer
Lamp
Display Error Information Solution
1 time
OFF E0
Indoor unit EEPROM parameter error TS18
2 times
OFF E1
Indoor / outdoor unit communication error TS19
3 times
OFF E2
Zero-crossing signal detection error(for some models) TS21
4 times
OFF E3
The indoor fan speed is operating outside of the normal range TS22
5 times
OFF E4
Indoor room temperature sensor T1 is in open circuit or has short
circuited
TS25
6 times
OFF E5
Evaporator coil temperature sensor T2 is in open circuit or has short
circuited
TS25
9 times
OFF E7
Indoor PCB / Display board communication error TS26
7 times
OFF EC
Refrigerant leak detected TS27
1 times
ON F0
Current overload protection TS28
2 times
ON F1
Outdoor room temperature sensor T4 is in open circuit or has short
circuited
TS25
3 times
ON F2
Condenser coil temperature sensor T3 is in open circuit or has short
circuited
TS25
4 times
ON F3
Compressor discharge temperature sensor TP is in open circuit or has
short circuited
TS25
5 times
ON F4
Outdoor unit EEPROM parameter error TS18
6 times
ON F5
The outdoor fan speed is operating outside of the normal range(for
some models)
TS22
1 times
FLASH P0
IPM malfunction or IGBT over-strong current protection TS29
2 times
FLASH P1
Over voltage or over low voltage protection TS30
3 times
FLASH P2
High temperature protection of IPM module TS31
5 times
FLASH P4
Inverter compressor drive error TS32
For other errors:
The display board may show a garbled code or a code undefined by the service manual. Ensure that this code is not a
temperature reading.
Troubleshooting:
Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement.
If the unit responds, the display board requires replacement.
Troubleshooting 4