Fisher FSKIF-121AE2-EU Service Manual page 135

2.3 Outdoor unit malfunction
For 18~60K:
Display
E1 Communication malfunction between indoor and outdoor units
F0 Overcurrent protection
F1 Ambient temperature sensor (T4) is malfunction
F2 Outdoor heat-exchanger temperature sensor (T3) is malfunction
F3 Discharge temperature sensor (T5) is malfunction
F4 Outdoor EEPROM is malfunction
F5 Outdoor fan speed has been out of control
P0 IPM module protection
P1 Voltage protection (too high or too low)
P3 Protection of ultra-low ambient temperature
P4 Rotor position protection of compressor
J0 High temperature protection of indoor heat exchanger in heating mode
J1 High temperature protection of outdoor heat exchanger in cooling mode
J2 High discharge temperature protection
J3 PFC module protection
J4 Communication error between outdoor main chip and compressor driven chip IR341
J5 High pressure protection
J6 Low pressure protection
P7 IGBT sensor is malfunction
J8 AC voltage protection
In low ambient cooling mode, the LED displays"LC" or alternative displays between running frequency
and "LC"(each displays 0.5s)
Electrical Control System
Malfunction or Protection
Troubleshooting
131