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e. Malfunctioning fans
f. Improper evaporator or
condenser airflow
g. Dirty Condenser
h. Iced evaporator
i. Refrigeration system restriction
j. Sealed system problem
k. Undercharge or overcharge
intake side
e. Check for both evaporator and
condenser fans
f. Check for air restrictions
g. Clean condenser
h. Defrost and reset temperature
i. Call service for checking restrictions
j. Call service for checking loss of
refrigerant or restrictions
k. Call service to add or remove
refrigerant
5.Unit running
too long or
continually
a. Improper room insulation & seal
b. Exhaust restricted
c. Room too large
d. Ambient temperature higher >
90
°F
e. Dirty Condenser
a. Check for insulation, gasket and door
opening
b. Leave minimum 3 feet clearance for
the exhaust side and leave minimum
1 foot clearance for the fresh air
intake side
c. Check for excessive size or increase
setting
d. Check for installation location or
increase setting
e. Clean condenser
7.Evaporator
icing
a. Evaporator air flow restriction
b. Unit not stopping due to air leak,
high ambient temperature or low
setting
c. Low ambient temperature
d. Bad thermostat or sensor
e. Refrigerant leak
f. Expansion valve blockage
a. Check for fans
b. Check for seal, door opening,
ambient temperature and setting
c. Defrost the unit
d. Check for thermostat and sensor
e. Check for sealed system leakage
f. Check for low side pressure
8.Circuit
tripping
a. Incorrect fuse or breaker
b. Incorrect wirings
c. Failed components
a. Check for proper fuse or breaker
b. Check for wirings and connections
c. Call service
9.Noisy
operation
a. Mounting area not firm
b. Loose parts
c. Compressor overloaded due to
high ambient temperatures or
airflow restriction
d. Malfunctioning components
a. Add support to improve installation
b. Check fan blades, bearings, cabinet
washers, tubing contact and loose
screws.
c. Check for airflow blockage
d. Call service for checking Internal
loose, inadequate lubrication and
incorrect wirings