Troubleshooting; Troubleshooting Guide - Koldfront WTC8001W Service Manual

7 Troubleshooting

7.1 Troubleshooting Guide

Problem
Air conditioner does
not function at all.
Air from unit does
not feel cold
enough.
Air conditioner
cooling, but room is
too warm - ice
forming on cooling
coil behind front grill.
Air conditioner
cooling, but room is
too warm - NO ice
forming on cooling
coil behind front grill.
Possible Cause
Wall plug is disconnected.
House fuse blown or circuit
breaker tripped.
Power cord is tripped.
Unit is turned OFF.
Ribbon cable to control panel is
disconnected.
Loose or disconnected wiring
on main PCB.
Room temperature is below
62℉ (17℃).
Temperature sensor behind the
front grill and air filter is
touching the cold evaporator.
Set temperature is too high.
Compressor is shut-off by
changing modes.
Outdoor temperature below
62℉ (17℃).
Air filter may be dirty.
Thermostat set too cold for
night-time cooling.
Dirty air filter- air restricted.
Temperature is set too High.
The directional louvers on the
front are positioned improperly.
Solution
Insert plug firmly into proper wall outlet.
Replace fuse with time delay type or reset
circuit breaker.
Press the RESET button on the power cord.
Turn unit ON and set to desired setting.
Remove front grill and reconnect cable.
Remove front grill and outer shell. Check all
connections to the PCB and reconnect any
loose or disconnected leads.
Cooling will not occur until room temperature
rises above 62℉ (17℃).
Realign sensor so it does not touch the
evaporator coil. It should only be sensing the
air temperature leaving the evaporator.
Set to a Lower temperature.
Wait approximately 3 minutes and listen for
compressor to restart when set in COOL
mode.
To defrost the coil, set to FAN ONLY mode.
Clean filter. Refer to Installation and Cleaning
section. To defrost, set to FAN ONLY mode.
To defrost the coil, set to FAN ONLY mode.
Then set temperature to a Higher setting.
Clean air filter. Refer to Installation and
Cleaning section.
Set to a Lower temperature.
Position louvers for better air distribution.
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