Troubleshooting - Fisher FSAI-SU-90AE2 Service Manual

8. Troubleshooting

8.1 Indoor Unit Error Display
Operation lamp Timer lamp
☆ 1 time
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 7 times
☆ 1 times
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 1 times
☆ 2 times
☆ 5 times
Display LED STATUS
Indoor unit EEPROM parameter error
X E0
Indoor / outdoor units communication error
X E1
X E2 Zero-crossing signal detection error
X E3 Indoor fan speed has been out of control
Open circuit or short circuit of indoor room temperature T1
X E4
sensor
Open circuit or short circuit of evaporator coil temperature T2
X E5
sensor
X EC Refrigerant Leakage Detection
O F0 Overload current protection
Open circuit or short circuit of outdoor ambient T4 temperature
O F1
sensor
Open circuit or short circuit of condenser coil temperature T3
O F2
sensor
Open circuit or short circuit of compressor discharge T5
O F3
temperature sensor
O F4 Outdoor unit EEPROM parameter error
O F5 Outdoor fan speed has been out of control
☆
P0 IPM malfunction or IGBT over-strong current protection
☆
P1 Over voltage or over low voltage protection
☆
P4 Inverter compressor drive error
O（light）
☆（flash）
X（off）
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