Communication failure
between controller and
main board
1. Poor signal wire connection or
damaged signal wire
2. Controller malfunction
1. Check and re-connect the
signal wire
2. Change a new signal wire
3. Turn off electricity supply and
restart machine
4. Change controller
Communication failure
between Main control
board and Driving board
1. Poor connection of communication
wire
2. The wire is damaged
1. Check the wire connection
2. Change wire
VDC voltage too high
protection
1. Line voltage is too high
2. Driver board is damaged.
1. Check if the power is in the
normal range
2. Change driver board or main
board
1. Data mistake
2. Wrong compressor phase connection
3. Compressor liquid and oil
accumulation lead to the current
becomes larger
4. Compressor or driver board damaged
1. Program error, turn off
electricity supply and restart
after 3 minutes
2. Change driver board
3. Check compressor sequence
connection
VDC voltage too low
protection
1. Mother line voltage is too low
2. Driver board is damaged.
1. Check if the power is in the
normal range
2. Change driver board
Input current over high
protection.
1. The compressor current is too large
momentary
2. The water flow is abnormal
3. Power fluctuations within a short
time
4. Wrong PFC inductor
1. Check the compressor
2. Check the waterway system
3. Check if the power is in the
normal range
4. Check if the correct PFC
inductor is used
IPM module thermal
circuit is abnormal
1. Output abnormity of IPM module
thermal circuit
2. Fan motor is abnormal or damaged
Fan blade is broken
1. Change a driver board
2. Check if the motor speed is
too low or fan motor damaged,
change it
3. Change the fan blade
8.
8.
8.
Troubleshooting
Troubleshooting
Troubleshooting
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