MovinCool CM12 Service Manual - Manual (Page 45)

Repair Section
45
7.7 Inspection of Fan Motor
(1) Evaporator fan motor
• Measure resistance across the terminals of the fan motor.
• Between terminals (at 77 °F (25 °C))
- Black-White Approx. 24.5 ohm
- Black-Blue Approx. 36.5 ohm
- Black-Red Approx. 39.0 ohm
• If the measured resistance is not equal to the standard values listed above, replace the fan
motor.
(2) Condenser fan motor
• Measure resistance across the terminals of the
fan motor.
• Between terminals (at 77 °F (25 °C))
- Black-White Approx. 8.8 ohm
- Black-Blue Approx. 7.0 ohm
- Black-Red Approx. 18.6 ohm
• If the measured resistance is not equal to the
standard values listed above, replace the fan
motor.
7.8 Inspection of Thermistor
• Using an Ohm-meter, check the resistance value across the 2-pin connector. At normal
temperature (77 °F (25 °C)) all thermistors (evaporator inlet air, freeze protection, or condenser
inlet air) should measure approximately 5 k ohm.
• Thermistors:
- Evaporator inlet air thermistor (RTS)
- Condenser inlet air thermistor (ODS)
- Freeze protection thermistor (CTS)
ILL00619-00
Black
White
Grey
Blue
Red
I003204
0
5
10
15
20
32
(0)
41
(5)
50
(10)
59
(15)
68
(20)
77
(25)
86
(30)
95
(35)
104
(40)
133
(45)
122
(50)
Temp. ° F ( ° C)
Resistance (k ohm)
Thermistor Specification