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24
OUTDOOR UNIT DIAGNOSTIC GUIDES
Table 16—Diagnostic Guides
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)
O（light） X（off） ☆（flash）
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