3
Indoor Unit
Operation
lamp
Timer
lamp
Digital
Display
Led Status Remark
☆ 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 Only available for AC motor of high-wall
☆ 4 times
X E3 Indoor fan speed has been out of control
☆ 5 times
X E4
Open circuit or short circuit of indoor room
temperature T1 sensor
☆ 6 times
X E5
Open circuit or short circuit of evaporator coil
temperature T2 sensor
☆ 7 times
X EC Refrigerant Leakage Detection Only available for single split
☆ 8 times
X EE Water-level alarm malfunction Only available for unit with drain pump
☆ 1 time O F0 Operation current protection
☆ 2 times
O F1
Open circuit or short circuit of outdoor ambient
T4 temperature sensor
☆ 3 times O F2
Open circuit or short circuit of condenser coil
temperature T3 sensor
☆ 4 times O F3
Open circuit or short circuit of compressor
discharge T5 temperature sensor
☆ 5 times O F4 Outdoor unit EEPROM parameter error
☆ 6 times O F5 Outdoor fan speed has been out of control
☆ 7 times
O F6 Open or short circuit of T2B temperature sensor Only available for multi-split outdoor unit
☆ 1 times
☆
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 compressor top
Only for 38QUS022/24DS
☆ 5 times ☆
P4 Inverter compressor drive error
☆ 6 times ☆
P5
Mode conflict
Only available for multi-split
O（light） X（off） ☆（flash）
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