Troubleshooting; Indoor Unit Error Display - Carrier 42HVM109303 Service Manual

9. Troubleshooting

9.1 Indoor Unit Error Display

Operation lamp Timer lamp
☆ 1 time
☆ 2 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 7 times
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 1 times
☆ 2 times
☆ 3 times
☆ 5 times
Display
X E0
X E1
X E3
X E4
X E5
X EC
O F1
O F2
O F3
O F4
O F5
☆
P0
☆
P1
☆
P2
☆
P4
O（light）
LED STATUS
Indoor unit EEPROM parameter error
Indoor / outdoor units communication error
Indoor fan speed has been out of control
Indoor room temperature sensor T1 open circuit or short
circuit
Evaporator coil temperature sensor T2 open circuit or
short circuit
Refrigerant Leakage Detection
Outdoor ambient temperature sensor T4 open circuit or
short circuit
Condenser coil temperature sensor T3 open circuit or
short circuit
Compressor discharge temperature sensor T5 open
circuit or short circuit
Outdoor unit EEPROM parameter error
Outdoor fan speed has been out of control
IPM malfunction or IGBT over-strong current protection
Over voltage or over low voltage protection
High temperature protection of compressor top diagnosis
and solution(only for 9k,12k models)
Inverter compressor drive error
☆（flash）
X（off）
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