Troubleshooting - EdgeStar AP12000S-1 Service Manual

6 Troubleshooting

Problem
Unit does not turn on.
Unit does not blow
cold air.
Unit blows cold air
but does not lower
room temperature.
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.
Condensate water tray is full and/or
water light is on.
Room temperature is below
61ºF(16ºC.)
Unit is not in cooling mode.
Set temperature is too high.
Air filter is dirty.
Exhaust air duct is installed
incorrectly or blocked.
Refrigerant leak.
Evaporator is frosted.
Fan speed is set too low.
Exhaust air duct is not installed, is
installed incorrectly or blocked.
Room area is too large.
Open windows or doors.
Ambient temperature is too high.
Room has too many heat sources.
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. If power
cord is damaged replace power cord.
Turn unit ON and set to desired setting.
Remove outer shell and reconnect cable.
Remove outer shell. Check all connections to the
PCB and reconnect any loose or disconnected leads.
Drain condensate water. Make sure water level
switch is operating correctly and not stuck in "full"
position or being interfered with.
Cooling will not occur until room temperature rises
above 61ºF(16ºC.)
Set the unit to cooling mode – blue light is on.
Set to a Lower temperature.
Clean filter.
Connect exhaust duct so if functions correctly. Clear
blockage.
Find leak and repair. Recharge with refrigerant.
The unit needs to defrost and will resume normal
operation after it is finished.
Increase fan speed to improve air flow.
Connect exhaust duct so if functions correctly. Clear
blockage.
Reduce room size, add another unit or larger unit.
Close all open windows and doors.
The unit may not work if the room temperature is
above 90°F.
Remove or shut off additional heat sources. Close
curtains or blinds to minimize the amount of direct
sunlight entering the room.
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