28 Specifications subject to change without notice. SG-38MHRC-01
Outdoor Unit Diagnostic Guide
Table 13 — Outdoor Unit Diagnostic Guide
O (light) X (off)
(flash)
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
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 time 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 time 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 or compressor top
4 times P3* Outdoor ambient temperature too low.
5 times P4 Inverter compressor drive error
6 times P5 Indoor units mode conflict (multi-zone ONLY)
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