Carrier 38QHC009D8S Series, Service Manual

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10.1 Indoor Unit Error Display
Operation
lamp
Timer lamp Display LED STATUS
☆
1 time
X E0 Indoor unit EEPROM parameter error
☆
2 times X E1 Indoor / outdoor units communication error
☆
4 times X E3 Indoor fan speed has been out of control
☆
5 times X E4
Indoor room temperature sensor T1 open circuit or short
circuit
☆
6 times X E5
Evaporator coil temperature sensor T2 open circuit or
short circuit
☆
7 times X EC Refrigerant leakage detection
☆
1 times O F0 Overload current protection
☆
2 times
O F1
Outdoor ambient temperature sensor T4 open circuit or
short circuit
☆
3 times O F2
Condenser coil temperature sensor T3 open circuit or
short circuit
☆
4 times O F3
Compressor discharge temperature sensor T5 open
circuit or short circuit
☆
5 times O F4 Outdoor unit EEPROM parameter error
☆
6 times
O F5 Outdoor fan speed has been out of control
☆
1 times
☆
P0 IPM malfunction or IGBT over-strong current protection
☆
2 times
☆
P1 Over voltage or over low voltage protection
☆
3 times
☆
P2 High temperature protection of IPM module
☆
5 times
☆
P4 Inverter compressor drive error
O
（
light
）
X
（
off
） ☆（
flash
）