Rheem RHMV2421MNACJA Service Manual page 86

Troubleshooting 26(Continued)
Check Point 1 : Check rotation of fan
Rotate the fan by hand when operation is off.
(Check if fan is caught, dropped off or locked motor)
>>If Fan or Bearing is abnormal, replace it.
Check Point 2 : Check ambient temp. around motor
Check excessively high temperature around the motor.
(If there is any surrounding equipment that causes heat)
>>Upon the temperature coming down, restart operation.
Check Point 3 : Check outdoor unit fan motor
Check Outdoor unit fan motor. (Parts information 4)
>>If Outdoor Fan Motor is abnormal, replace Outdoor fan motor and Main PCB.
Check Point 4 : Check output voltage of main PCB
Check outdoor unit circuit diagram and voltage. (Measure at main PCB side connector)
RP1724/1730HJVXA
RED
1 1
2 2
3 3
BLACK
CN800 4 4
WHITE
5 5
YELLOW
6 6
BROWN
7 7
RP1736/1748HJVXA
RED
1 1
2 2
3 3
BLACK
CN243 4 4
WHITE
5 5
YELLOW
6 6
BROWN
7 7
If voltage is not correct, replace main PCB.
OK
OK
OK
FAN MOTOR
FM
FAN MOTOR
FM
Read wire DC voltage
Red - Black 260V ~ 400V
White - Black
Read wire DC voltage
Red - Black 260V ~ 400V
White - Black
03-36
15 1.5V
15 1.5V