Troubleshooting; Indoor Unit Error Display - Kaisai KFU-09HRDN1-QRC8W Service Manual

9. Troubleshooting

9.1 Indoor Unit Error Display

Operation lamp Timer lamp
☆ 1 time
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 7 times
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 1 times
☆ 2 times
☆ 3 times
☆ 5 times
O（light） X（off）
Display LED STATUS
X E0 Indoor unit EEPROM parameter error
X E1
Indoor / outdoor units communication error
Zero crossing signal detection error(only for
X E2 MS12FU-09HRDN1-QRC8W, MS12FU-09HRDN1-QRC8GW,
MS12FU-12HRDN1-QRC8GW, MS12F-24HRDN1-QRC8GW)
X E3 Indoor fan speed has been out of control
Open circuit or short circuit of indoor room temperature T1
X E4
sensor
Open circuit or short circuit of evaporator coil temperature
X E5
T2 sensor
X EC Refrigerant Leakage Detection
Open circuit or short circuit of outdoor ambient T4
O F1
temperature sensor
Open circuit or short circuit of condenser coil temperature
O F2
T3 sensor
Open circuit or short circuit of compressor discharge T5
O F3
temperature sensor
O F4 Outdoor unit EEPROM parameter error
O F5 Outdoor fan speed has been out of control
☆
P0 IPM malfunction or IGBT over-strong current protection
☆
P1 Over voltage or over low voltage protection
High temperature protection of compressor top diagnosis
and solution(Only for KFU-24HRFN1-QRC8W,
☆
P2
KFU-24HRFN1-QRD0GW and KFU-24HRDN1-QRC8GW
models)
☆
P4 Inverter compressor drive error
☆（flash）
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