Fisher FSAIF-Pro-123AE2, Service Manual

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9. Troubleshooting
9.1 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
☆
3 times X E2 Zero crossing signal detection error(only for 12k model)
☆
4 times X E3 Indoor fan speed has been out of control
☆
5 times X E4
Open circuit or short circuit of indoor room temperature T1
sensor
☆
6 times
X E5
Open circuit or short circuit of evaporator coil temperature T2
sensor
☆
7 times X EC Refrigerant Leakage Detection
☆
2 times O F1
Open circuit or short circuit of outdoor ambient T4 temperature
sensor
☆
3 times
O F2
Open circuit or short circuit of condenser coil temperature T3
sensor
☆
4 times O F3
Open circuit or short circuit of compressor discharge T5
temperature sensor
☆
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 compressor top diagnosis and
solution(Only for 24k model)
☆
5 times
☆
P4 Inverter compressor drive error
O
（
light
）
X
（
off
） ☆（
flash
）