15
E. Diagnostic Tables
Check for correct appliance installation per the instruction manual and proper voltage per
appliance nameplate.
1. Not Cooling
Not Cooling - Possible Cause
1. Power Supply
a) Unplugged, off, blown fuse, tripped or defective circuit
breaker. On three-section receptacle box, only top
receptacles have power.
b) Loose connection.
c) Not within specifications.
2. Cord and Plug On three-
section model, check
receptacle box cord and
plug and one-section and
two-section cords and
plugs
a) Loose connection.
b) Defective.
3. Power Switch (control
box)
a) "OFF" position.
b) Defective.
4. Wiring
a) Loose connection.
b) Faulty.
5. Controller, See "III.D.
Alarm Safeties" and "II.C.
Controller Check"
a) In alarm or "- - -" shown on display.
b) Defective.
6. Evaporator Fan Motor
a) Defective.
7. Compressor Relay
a) Defective.
8. Compressor Protector
a) Dirty condenser.
b) Condenser fan motor not operating.
c) Compressor capacitor or start relay defective.
d) Defective.
9. Compressor
a) Defective.
10. Condenser
a) Dirty.
11. Evaporator See "II.E.2.
Evaporator Frozen Up"
a) Clogged or frozen.
12. Refrigerant/Refrigerant
Lines
a) Refrigerant leak.
b) Refrigerant lines restricted.
