17.2 Error Display on Two Way Communication Wired Controller
Communication error between wired controller and indoor unit
The cassette panel is abnormal
Communication malfunction between indoor and outdoor units
Indoor room temperature sensor (T1 ) is in open circuit or has short circuited
Evaporator coil temperature sensor (T2) is in open circuit or has short circuited
Evaporator coil outlet temperature sensor T2B is in open circuit or has short
circuited(for free-match units)
Outdoor ambient temperature sensor (T4 ) or condenser coil temperature sensor (T3)
or compressor discharge temperature sensor (T5) is in open circuit or has short
circuited
Indoor unit EEPROM parameter error
Indoor fan speed is operating outside of the normal range
Current overload protection
Inverter module (IPM) malfunction
Water-level alarm malfunction
For new cassette type, error display on two way communication wired controller is the same as that of
indoor display.
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