Kaisai ICE Series, Service Manual

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 Troubleshooting 
Index:
1. Indoor or Outdoor DC Fan Motor(control chip is in fan motor)
Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the
value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced.
• DC motor voltage input and output (voltage: 220-240V~) :
No. Color Signal Voltage
1 Red Vs/Vm 192V~380V
2 --- --- ---
3 Black GND 0V
4 White Vcc 14-17.5V
5 Yellow Vsp 0~5.6V
6 Blue FG 14-17.5V
• DC motor voltage input and output (voltage: 115V~) :
No. Color Signal Voltage
1 Red Vs/Vm 140V~190V
2 --- --- ---
3 Black GND 0V
4 White Vcc 14-17.5V
5 Yellow Vsp 0~5.6V
6 Blue FG 14-17.5V
2. Indoor AC Motor
1) Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage
of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply) or 50V (115V power supply),
the PCB must has problems and need to be replaced.