Topaz TZ-12AB, Owner'S Manual

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9
Portable Air Conditioners
Problem Cause Remedy
Insufficient cooling Insufficient airflow through evaporator See Preventive Maintenance section of this manual.
coil due to:
-Dirty air filter in unit -Clean filter.
-Dirty evaporator coil -Clean filter with a vacuum cleaner and hose.
-Ice on evaporator coil -Defrost. Run on fan only.
-Obstructed air intake -Remove obstruction.
-Low refrigerant -Repair leak in system.
-Improper Motor Rotation (TZ-60AB4 only) Reverse two of the three power supply leads
(See TZ-60AB4. Phase wiring instructions pg. 6)
Unit improperly sized Check to assure unit is sized for load.
Add supplemental unit if required.
Noisy operation Copper tubing vibrating Adjust by bending slightly to firm position.
Segregate tubes touching cabinet or each other.
Loose cabinet or internal component Check and tighten loose screws.
Machine vibrating - out of level Level unit base.
Blower motor bearing defective Replace blower motor.
Water leaks from pan Leaky drain pan Replace pan.
Drain plugged Check and clear obstruction.
Loose evaporator, drain, or condensate Tighten connections.
pump hose
Defective condensate pump or excessive If elevation exceeds 20-ft, a larger pump is
lift on pump required. Pump does not operate properly if
combination of lift height and length of drain line
exceeds 20-ft.
Change pump, if defective.
Unit not on level surface. Level.
Evaporator coil freezing Evaporator exhaust screen obstructed Remove obstruction.
and shuts unit down
Freeze protection control not operating Check that control is securely attached to
correctly (TZ-12AB, 24AB, 36AB, 60AB evaporator coil’s outlet and that insulation
and 60AB4 only) is in place.
Check wiring connections to freeze
protection control.
Unit not delivering Drive belt damaged or not Check condition and adjustment of evaporator
proper air flow adjusted correctly and condenser fan belts and sheaves.
TZ-60AB4 only Adjust belts for 3/16-in deflection. (See pg. 7)