
Troubleshooting
102 Electrical Control System
2.2 Indoor unit malfunction
For HKD,HND
Operation lamp flash times
Indoor EEPROM malfunction
Indoor / outdoor units communication error
Indoor fan speed has been out of control
Open or short circuit of T1 temperature sensor
Open or short circuit of T2 temperature sensor
Open or short circuit of T4 temperature sensor
Open or short circuit of T3 temperature sensor
Open or short circuit of T5 temperature sensor
Outdoor EEPROM parameter error
Outdoor fan speed out of control
Open or short circuit of T2B temperature sensor
Inverter compressor drive protection
O(light) X(off) ☆(flash)
For Cassette & Duct:
Open or short circuit of T1 temperature sensor
Open or short circuit of T2 temperature sensor
Indoor / outdoor units communication error
Indoor EEPROM malfunction
Open or short circuit of T3 or T4 temperature sensor or
Outdoor EEPROM malfunction
Outdoor fan speed has been out of control
Indoor fan speed has been out of control
Outdoor unit over-current protection
Inverter compressor drive protection
☆ Flash(at 2.5Hz) ◎ Flash(at 0.5Hz) O light X(off)
Note: Digital display is only available for A5 duct type.
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