Service Manual

25
1. Appliance Not Cooling
Appliance Not Cooling - Possible Cause
1.
Power Supply
a)
Unplugged, blown fuse, or tripped or defective circuit breaker.
b)
Loose connection.
c)
Not within specications.
2.
Power Supply Cord and Plug
a)
Loose connection.
b)
Defective.
3.
Wiring
a)
Loose connection or disconnected.
b)
Defective.
4.
Cabinet Thermistor
a)
Loose, disconnected, or defective.
5.
Control Module
See "II.C. Control Module Check" and
"II.D. Thermistor Check"
a)
Control module LEDs ashing CTh fault code (green (G) and yellow (Y)
ashing).
b)
Defective.
6.
Evaporator Fan Motor
a)
Fan blade binding.
b)
Defective.
7.
Condenser Fan Motor
a)
Fan blade binding.
b)
Defective.
8.
Compressor External Protector
a)
Dirty condenser.
b)
Condenser fan motor not operating.
c)
Start or PTC relay defective.
d)
Start or Run capacitor (if applicable) defective.
e)
Defective.
f)
Low charge.
9.
Compressor
a)
Defective.
10.
Condenser
a)
Dirty.
1 1.
Evaporator
a)
Dirty or frozen up.
12.
Refrigerant/Refrigerant Lines
a)
Low.
b)
Refrigerant lines or components restricted.
2. Evaporator is Frozen Up
Evaporator is Frozen Up - Possible Cause
1.
Evaporator
a)
Dirty.
2.
Evaporator Fan Motor
a)
Fan blade binding.
b)
Defective.
3.
Cabinet Thermistor
See "II.D. Thermistor Check"
a)
Defective.
4.
Control Module
See "II.C. Control Module Check"
a)
Defective.
5.
Defrost Thermistor
See "II.D. Thermistor Check"
a)
Defective.
6.
Defrost Heater (if applicable)
a)
Defective.
7.
Defrost Safety Thermostat Open
(if applicable)
a)
Defective. Open. Cut-out: 120°F±5°F (49°C±3°C), Cut-in: 70°F±5°F
(21°C±3°C).
6.
Refrigerant Charge
a)
Low.