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Indoor Unit Diagnostic Guide
Table 7—Indoor Unit Error Display
Operation Lamp Timer Lamp Display LED Status
☆1 time
X E0 Indoor unit EEPROM error
☆ 2 times X E1 Communication malfunction between indoor and outdoor units
☆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
☆8 times X EE Water-level alarm malfunction
☆1 time O F0 Current overload protection
☆2 times O F1 Open circuit or short circuit of outdoor ambient temperature sensor T4
☆3 times O F2 Open circuit or short circuit of condenser coil temperature sensor T3
☆4 times O F3 Open circuit or short circuit of Compressor discharge temperature sensor T5
☆5 times O F4 Outdoor unit EEPROM error
☆6 times O F5 Outdoor fan speed has been out of control
☆7 times O F6 T2B sensor error
☆8 times O F7 Lifting-panel communication error
☆9 times O F8 Lifting-panel malfunction
☆10 times O F9 Lifting-panel is not closed
☆1 time ☆ P0 IPM malfunction
☆2 times ☆ P1 Over voltage or over low voltage protection
☆3 times ☆ P2 High temperature protection of compressor top
☆4 times ☆ P3 Outdoor low temperature protection
☆5 times ☆ P4 Inverter compressor drive error
☆6 times ☆ P5 Mode conflict
☆7 times ☆ P6 Compressor low-pressure protection
☆8 times ☆ P7 Outdoor IGBT temperature sensor error
O (light) X (off) ☆ (flash)
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