69
TROUBLESHOOTING
H1
Description
Communication error between main control board and inverter module.
The unit shuts down.
The error code is displayed on the main PCB and user interface.
Possible causes
Abnormal power supply.
Transformer malfunction
Interference from a source of electromagnetic radiation.
Main PCB or inverter driven module damaged.
Procedure
H1
↓
Main PCB or transformer power supply is abnormal
YES →
Provide normal power supply
NO
↓
Transformer malfunction
YES →
Replace the transformer
NO
↓
There is a source of electromagnetic radiation
near the unit, such as high-frequency transmitter or
other high-strength radiation device
YES →
Remove the source of interference
NO
↓
Replace the main PCB and the inverter driven
module
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