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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
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 cellar insulation & seal
b. Exhaust restricted
c. Cellar too large
d. Ambient temperature > 90
°
F
e. Dirty Condenser
f. Improper condenser air flow
a. Check insulation, gasket and door
opening
b. Leave minimum 3 feet clearance for the
hot air exhaust side and leave minimum
1 foot clearance for the ambient air
intake side
c. Check for excessive size
d. Check for installation location
e. Clean condenser
f. Check for fan and air short circulation
8. Condenser fan
running but
compressor not
running
a. Incorrect or loose wirings
b. Failed components
c. Liquid
refrigerant
in
the
compressor
a. Check all wirings and connections
b. Check start relay, start capacitor,
overload protector, compressor.
c. Call service.
9. Compressor running
but condenser fan
not running
a. Fan blade stuck
b. Incorrect or loose wirings
c. Failed motors
d. Fan cycle control
a. Check for proper clearance
b. Check all wirings
c. Call service
d. Check for setting
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.Evaporator fan
running too long
a. Post-compressor
fan
running
mode for humidity modulation
a. Reset FON
12. Evaporator fan
running but
condensing unit not
running
a. Incorrect or loose wirings
b. Failed components
c. Low refrigerant
a. Check all wirings and connections
b. Check start relay, start capacitor,
overload protector, compressor.
c. Call service
13.Temperature low
a. Low temperature setting
b. Low ambient temperature
c. Air probe fault
d. Temperature controller fault
a. Raise the setting
b. Move to another location
c. Check probe connections or change a
new one
d. Change a new one