specifically designed to adapt to today’s high tech environments such as telecommunication or
computer rooms and is equipped with the necessary controls to maintain those special
environments. Call your nearest KwiKool distributor or 1-800-594-5665 for help or for questions
about other applications.
10. TROUBLE SHOOTING GUIDE
a. Blank Display – Caused by power failure, tripped circuit breaker, or unit not plugged in.
b. Unit will not Start – Caused by:
1. Unit is timing out. Wait 3 minutes.
2. Tripped Breaker, Reset Breaker
3. Unit is in Off Mode. Put unit in "On" Mode.
4. Set point matches ambient air temperature.
c. Unit Off/Alarm Sounds & Panel Display Reads “CF”
1. Condensate Float Jack not installed.
2. Condensate Tank Full. Empty tank.
d. Unit Alarm Sounds & "AL" Displays
1. High Pressure switch activated. Reset switch is the red button inside access
panel.
2. Check condenser intake & exhaust duct for restricted air movement.
3. Check area above the ceiling for limited air movement. Provide additional path
for exhaust & intake air flows.
4. Pump drain line is restricted. Check water line for blockage.
e. Unit Will Not Cycle “Off”, Continuous Cold Air – The compressor never shuts off,
indicated by constant cold air discharge. This condition may cause the evaporator coil
to freeze up.
1. Temperature set point is set too low.
2. Improperly sized unit, insufficient capacity.
3. Excessive outside ambient air from outside. Close doors when building air
conditioning is shut down. Also, block perforated panels in ceiling, which may
cause heat to come back into the room.
f. Unit Runs Without Cooling – Compressor Will Not Start
1. Check circuit voltage. For 208/230-volt units, a circuit voltage of 208 may
prevent the compressor from starting, since the unit is set up to run at 230 volts.
Change voltage switch inside the inspection door to the 208-position.
2. If coil freezes, put unit in fan mode by holding down the fan button for 3 seconds,
raise temperature set point to allow unit to cycle on & off. Wait about 30 minutes
to the coil to unfreeze. The unit’s capacity may be undersized for the
application’s heat load.
3. A dirty intake filter on the front of the unit will block heat exchange across the
evaporator coil, which will prevent cooling.
4. Obstruction to the condenser air intake may cause the compressor to shut off on
high pressure. Check the airflow going into the top of the unit’s front flange from
the space above the ceiling or the air intake.
5. Unit’s control mode is set to “fan” only.
g. Trouble-Shooting Failure – If your trouble-shooting efforts fail, call KwiKool at 1-800-
594-5665 and ask for service support.
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