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Maintenance and Service
COMPLAINT
Compressor
cycles on
overload.
Insufficient
cooling or heating
Excessive noise.
ROOM AIR CONDITIONER VOLTAGE LIMITS
NAME PLATE RATING
208/230 V
22 Room Air Conditioner
CAUSE
I Voltage
I Overload
I Fan motor
I Condenser air flow
restriction
I Condenser fins
(damaged)
I Capacitor
I Wiring
I Refrigerating system
I Air filter
IExhaust damper door
IUnit undersized
ICross flow fan
ICopper tubing
• Check the voltage. See the limits on the preceding
page. If not within limits, call an electrician.
• Check overload, if externally mounted.
Replace if open. (If the compressor temperature is
high, remove the overload, cool, and retest.)
• If not running, determine the cause. Replace if
required.
• Remove the cabinet. inspect the interior surface of the
condenser; if restricted, clean carefully with a vacuum
cleaner (do not damage fins) or brush. Clean the
interior base before reassembling.
• If condenser fins are closed over a large area on the
coil surface, head pressures will increase, causing the
compressor to cycle. Straighten the fins or replace the
coil.
• Test capacitor.
• Check the terminals. If loose, repair or replace.
• Check the system for a restriction.
• If restricted, clean or replace.
• Close if open.
• Determine if the unit is properly sized for the area to
be cooled.
• Check the set screw or clamp. If loose or missing,
correct. If the blower or fan is hitting air guide,
rearrange the air handling parts.
• Carefully rearrange tubing not to contact, compressor,
shroud, and barrier.
MINIMUM
187 V
REMEDY
MAXIMUM
253 V
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