Fan Motor Detection Standard - Haier MRV5-H Service Manual

8.2.5 Fan Motor Detection Standard

Expected readings of control
PWB VDC outputs to DCFM
Multi meter test points for VDC
Multimeter Multimeter
red probe black probe
SE GND2
+5V GND2
A2 GND2
1G ND2
2S
3 +5V
4
5A
Expected readings of control
PWB VDC outputs to DCFM
Multi meter test points for VDC
Multimeter Multimeter
red probe black probe
+280VDC GND
1 +280VDC
2G ND
3
4
Fan Motor Code: 0150401918C
PCB DC volts
5V
5V
5V
Wring of DC fan motor
Communication signal
public ground
Send or receive signal
E
wire
5V communication
power supply
/ /
Communication
2
address
PCB DC volts
280VDC
Wring of DC fan motor
Input DC high voltage
positive
Input DC high voltage
negative
Expected readings of DC fan
motor circuit board resistances
Multimeter Multimeter
black probe red probe
SE GND2
+5VG ND2
A2 GND2
Blue
Gray
Yellow
/
White
Expected readings of DC fan
motor circuit board resistances
Multimeter Multimeter
black probe red probe
+280VDC GND
Red
White
143
DCFM PWB
resistance value
DCFM PWB
resistance value
1.31