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
flashes
Timer lamp
LED
Display
Error Information
Solution
1 time
OFF
0
Indoor unit EEPROM parameter error
Page 72
2 times
OFF
1
Indoor / outdoor units communication error
Page 73
3 times
OFF
Zero-crossing signal detection error
Page 75
4 times
OFF
The indoor fan speed is operating outside of the normal range
Page 76
5 times
OFF
4
Indoor room temperature sensor T1 is in open circuit or has
short circuited
Page 78
6 times
OFF
Evaporator coil temperature sensor T2 is in open circuit or
has short circuited
Page 78
9 times
OFF
7
Indoor PCB /Display board communication error
Page 79
7 times
OFF
C
Refrigerant leak detected
Page 80
1 time
ON
F0
Overload current protection
Page 81
2 times
ON
F1
Outdoor ambient temperature sensor T4 open circuit or
short circuit
Page 78
3 times
ON
F
Condenser coil temperature sensor T3 is in open circuit or
has short circuited
Page 78
4 times
ON
F
Compressor discharge temperature sensor TP open circuit
or short circuit
Page 78
5 times
ON
F4
Outdoor unit EEPROM parameter error
Page 72
6 times
ON
F
The outdoor fan speed is operating outside of the normal range
Page 76
1 time
FL H
p0
IPM malfunction or IGBT over-strong current protection
Page 82
2 times
FL H
p1
Over voltage or over low voltage protection
Page 83
3 times
FL H
p
High temperature protection of IPM module
Page 84
5 times
FL H
p4
Inverter compressor drive error
Page 85
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.
Page 62
Trou
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