Ultra Heat GMV5 User Manual
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High pressure sensor error
Middle pressure sensor error
Low pressure sensor error
Discharge temperature sensor error
IPM over current protection
Desynchronizing protection
Busbar over voltage protection
Phase current detection fault
Busbar under voltage protection
Demagnetization protection
Communication error between indoor and
outdoor units, indoor unit’s wired controller
485 communication error between main
controller and drive controller
PFC over current protection
Phase loss protection of compressor
Malfunction of lack of IDU
485 communication error between main
controller and debugging controller
6.3.2 Error Code of Limiting Frequency Reduction Protection
Limited frequency reduction for high pressure protection
Only the outdoor
unit displays the
code
Limited frequency reduction for low pressure protection
Limited frequency reduction for discharge temperature
protection
Limited frequency reduction for AC current protection
Limited frequency reduction for power protection
Limited frequency reduction for IPM temperature protection
Limited frequency reduction for PFC temperature protection