Outdoor Fan Speed Has Been Out Of Control; Outdoor Dc Fan Motor - KOREL M2OC-18HFN8-Q Service Manual

10.3.3.4 Outdoor fan speed has been out of control (E8)
Power off, then restart the
Power off, then restart the
unit 2 minutes later. Is it still
unit 2 minutes later. Is it still
displaying the error code?
displaying the error code?
Yes
Shut off the power supply,
Shut off the power supply,
rotate the fan by hand. Does
rotate the fan by hand. Does
it rotate properly?
it rotate properly?
Yes
Check the wiring of fan
Check the wiring of fan
motor. Are all the
motor. Are all the
connections good?
connections good?
Yes
Check whether the main PCB
Check whether the main PCB
is normal through index 1?
is normal through index 1?
Yes
Replace the fan motor
Replace the fan motor
Index 1:
1. Outdoor DC fan motor(control chip is inside 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 have
problems and need to be replaced.
DC motor voltage input and output
NO. Color
1 Red
2 ---
3 Black
4 White
5 Yellow
6 Blue
No
No
No
No Replace the main PCB
Replace the main PCB
Signal Voltage
Vs/Vm 140V~380V
--- ---
GND 0V
Vcc 13.5-16.5V
Vsp 0~6.5V
FG 15V
The unit operates normally.
The unit operates normally.
Find out the cause and
Find out the cause and
have it solved. For
have it solved. For
example,
whether the fan
example,
whether the fan
is blocked or the screws
is blocked or the screws
which fix the fan are
which fix the fan are
tighten.
tighten.
Correct the connections.
Correct the connections.
No
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