1 — Air Conditioner
Outdoor unit is running in variable-capacity or emergency mode.
16 — Air Conditioner
Communication between the outdoor control board and user interface is lost.
25 — Air Conditioner
Control board detected missing or invalid model-plug information.
31 — Air Conditioner
High-pressure switch opened due to excessive discharge pressure.
32 — Air Conditioner
Low-pressure switch tripped due to low suction pressure.
45 — Air Conditioner
Control board detected a compressor motor winding fault.
46 — Air Conditioner
Supply voltage sagged below threshold, triggering a brownout delay.
48 — Air Conditioner
Communication link between main control board and inverter was lost.
49 — Air Conditioner
Incoming 230VAC power dropped out momentarily, triggering a restart delay.
53 — Air Conditioner
Outdoor air temperature sensor reading is out of range or disconnected.
54 — Air Conditioner
Suction line temperature sensor reading is out of range or disconnected.
55 — Air Conditioner
Outdoor coil temperature sensor reading is out of range or disconnected.
56 — Air Conditioner
Discrepancy detected between outdoor air and outdoor coil thermistor readings.
57 — Air Conditioner
Suction pressure transducer signal is outside valid voltage parameters.
58 — Air Conditioner
Transient communication loss occurred between control board and inverter module.
59 — Air Conditioner
Compressor scroll temperature reading exceeded safe operating threshold.
62 — Air Conditioner
Compressor motor failed to start upon demand.
68 — Air Conditioner
Compressor crankcase sump heater is actively energized.
69 — Air Conditioner
Inverter module detected an internal hardware or diagnostic fault.
71 — Air Conditioner
Compressor motor temperature exceeded safe limit.
72 — Air Conditioner
High suction line temperature detected during cooling operation.
75 — Air Conditioner
Inverter heat sink temperature exceeded normal limits.
77 — Air Conditioner
Inverter module detected excessive current draw to the compressor.
79 — Air Conditioner
Compressor is running electrically but failing to pump refrigerant.
82 — Air Conditioner
System locked out for 4 hours due to repeated suction over-temperature events.
83 — Air Conditioner
System locked out for 4 hours due to repeated low-pressure trips.
84 — Air Conditioner
System locked out for 4 hours due to repeated high-pressure trips.
85 — Air Conditioner
System locked out for 4 hours due to repeated compressor high temperature faults.
86 — Air Conditioner
Fault detected in cable harness connecting control board to inverter module.
91 — Air Conditioner
Inverter DC bus voltage exceeded safe maximum limit.
92 — Air Conditioner
Inverter DC bus voltage dropped below minimum threshold.
93 — Air Conditioner
Incoming 230VAC line voltage dropped below safe threshold during operation.
94 — Air Conditioner
Incoming 230VAC line voltage exceeded maximum allowable threshold.
95 — Air Conditioner
System locked out for 2 hours due to excessive compressor current draw.
96 — Air Conditioner
System locked out for 2 hours due to repeated inverter DC under-voltage faults.
97 — Air Conditioner
System locked out for 2 hours due to repeated inverter DC over-voltage faults.
98 — Air Conditioner
High compressor motor operating torque detected.
99 — Air Conditioner
System locked out for 2 hours due to repeated high torque events.
solid — Air Conditioner
Unit is powered and operating in normal standby mode.
2s_on_1s_off — Air Conditioner
Compressor speed range is cut back due to operating conditions.
