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high or not
cooling and
running
continually
seal
b. Cabinet too large
c. Ambient temperature too high
d. Exhaust restricted
e. Malfunctioning
fans
f.
Evaporator or condenser airflow
g. Dirty
Condenser
h. Iced
evaporator
i. Refrigeration
system
restriction
j. Refrigerant
leak
k. Undercharge or overcharge
l. Failed
components
opening
b. Check for excessive size
c. Check installation location
d. Leave minimum clearance for the
hot air exhaust and fresh air intake
sides
e. Check for both evaporator and
condenser fans
f. Check for air restrictions, air short-
circulation, grille directions
g. Clean
condenser
h. Defrost and reset temperature
i. Call
service
j.
Call service
k. Call service
l. Check compressor windings, start
relay and overload protector
7. Unit running
too long
a. Improper cabinet insulation &
seal
b. Exhaust restricted
c. Cabinet too large
d. Ambient temperature higher >
90
°
F
e. Dirty Condenser
f. Improper condenser air flow
a. Check insulation, gasket and door
opening
b. Leave minimum clearance for the
hot air exhaust and fresh air intake
sides
c. Check for excessive size
d. Check for installation location
e. Clean condenser
f. Check for fan and air short
circulation
8. Fan motor
running but
compressor
not running
a. Post-compressor fan running
mode
b. Incorrect or loose wirings
c. Failed
components
d.
Liquid refrigerant in the
compressor
a. Check fan running time FON
b. Check all wirings and connections
c. Check start relay, start capacitor,
overload protector, compressor.
d. Call
service.
9. Compressor
running but
fan not
running
a. Fan blade stuck
b. Incorrect or loose wirings
c. Failed
motors
a. Check for proper clearance
b. Check all wirings
c. Call
service
10.Temperature
high,
compressor
stopping
and starting
but very
short
running time
a. Failed
components
b. Improper
condenser
airflow
c. Dirty
condenser
d. Overcharge of refrigerant
e. Discharge or suction pressure
too high
a. Check compressor windings, start
relay and overload protector.
b. Check for condenser fan
c. Clean
condenser
d. Call service for removing refrigerant
e. Call service for information
11.Fan running
too long
a.
Post-compressor fan running
mode for humidity modulation
a. Reset FON
12.Temperature
low
a. Low temperature setting
b. Low ambient temperature
c. Air probe fault
a. Raise the setting
b. Move to another location
c. Change a new one
