2.12 H0: Communication error between main board and compressor drive board
Digital display output
Description
 H0 indicates a communication error between main board and compressor drive board.
 All units stop running.
 Error code is displayed on the unit with the error.
Trigger / recover condition
 Trigger condition: Main control board and inverter driver board cannot communication for 2 minutes.
 Recover condition: Communication go back to normal.
 Reset method: Resume automatically.
Possible causes
 Loosened communication wiring from the outdoor main PCB to the inverter module.
 Filter board damaged.
 Compressor inverter module damaged.
 Outdoor main PCB damaged.
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