Service Manual

19
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 Cord and Plug
a)
Loose connection.
b)
Defective.
3.
Wiring
a)
Loose connection or open.
b)
Faulty.
4.
Evaporator Fan
a)
Defective.
b)
Fan blade binding.
5.
Compressor External Protector
a)
Dirty condenser.
b)
Condenser fan not operating.
c)
Defective.
d)
Start relay defective.
e)
Low charge.
f)
Start capacitor (if applicable) defective.
6.
Compressor
a)
Defective.
7.
Condenser
a)
Dirty.
8.
Evaporator
a)
Dirty or frozen up.
9.
Refrigerant/Refrigerant Lines
a)
Gas leak.
b)
Refrigerant lines or components restricted.
10.
High-Pressure Switch
CRMR60 and CRMR72 prep
table, CRMF48(-01)(-W)(-W01),
and CRMF60(-W)
a)
Dirty condenser.
b)
Ambient temperature too warm.
c)
Condenser fan not operating.
d)
Refrigerant overcharge.
e)
Refrigerant lines or components restricted.
f)
Bad contacts.
11.
Thermostatic Expansion Valve
(not adjustable)
CRMF48(-01)(-W)(-W01)
(auxiliary codes A-5 and B-5)
a)
Defective.
2. Evaporator is Frozen Up
Evaporator is Frozen Up - Possible Cause
1.
Evaporator
a)
Dirty.
2.
Evaporator Fan
a)
Defective.
b)
Fan blade binding.
3.
Refrigerant Charge
a)
Low.
4.
Defrost Heater (freezer)
a)
Defective.
5.
Defrost Timer (prep table and freezer)
a)
Defective.
6.
Defrost Safety Thermostat Open
(freezer)
a)
Defective.
7.
Thermostatic Expansion Valve
(not adjustable)
CRMF48(-01)(-W)(-W01)
(auxiliary codes A-5 and B-5)
a)
Defective.