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Current overload protection
Outdoor ambient temperature sensor (T4 ) malfunction
Condenser coil temperature sensor (T3) malfunction
Compressor discharge temperature sensor (T5) malfunction
Outdoor unit EEPROM parameter error
Outdoor fan speed malfunction
Indoor coil outlet pipe sensor(Located on outdoor unit low pressure
valve)
Communication malfunction between Cassette optional lift panel
and the unit.
Cassette optional lift panel malfunction
Cassette optional lift panel not closed
Inverter module (IPM) malfunction
Over-voltage or under-voltage protection
High temperature protection of compressor top(OLP)/ High
temperature protection of IPM board
Low ambient temperature protection
Compressor drive malfunction
Indoor units mode conflict
★ flash , light, X extinguished
7.3 Outdoor Unit Display
7.3.1 Outdoor Unit Point Check Function
A check switch is included on the outdoor PCB.
Push SW1 to check the unit's status while running. The digital display shows the following codes each
time the SW1 is pushed.
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