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Tips Continued
COMPLAINT
Water "spitting" into room
Excessive moisture
Unit short cycles
Prolonged off cycles
Outside water leaks
Room temperature uneven
(Heating cycle)
Does not heat adequately
43
TROUBLESHOOTING
CAUSE
Sublimation:
When unconditioned saturated, outside
air mixes with conditioned air, conden-
sation forms on the cooler surfaces
Downward pitch of installation is too
steep towards back of unit
Restricted coil or dirty fi lter
Insufficient air circulation thru area to
be air conditioned
Inadequate vapor barrier in building
structure, particularly fl oors
Defective thermistor
Unit oversized
Chassis seal gasket not sealing or
absent causting unit to short cycle
Restricted coil or dirty fi lter
Defective indoor ambient thermistor or
electronic control board
Evaporator drain pan cracked or ob-
structed
Obstructed condenser coil
Fan blade/slinger ring improperly
positioned
Bad indoor ambient thermistor
Fan speed too low
Dirty filter
Unit undersized
Heater hi-limit control cycling on & off
Shorted or open supplementary heater
Incorrect wiring
SOLUTION
Ensure that foam gaskets are installed in
between window panes & in between the unit &
the sleeve. Also, ensure that fresh
air/exhaust vents (on applicable models) are in
the closed position & are in tact
Follow installation instructions to ensure that
downward pitch of installed unit is no less than
1/4" & no more than 3/8"
Clean & advise customer of periodic cleaning &
maintenance needs of entire unit
Adjust louvers for best possible air circulation
Advise customer
Replace thermistor or electronic control board
See sizing chart. Correct as needed.
Check gasket. Reposition or replace as needed
Clean & advise customer of periodic cleaning &
maintenance needs of entire unit
Check alarms. Replace thermistor or electronic
control board
Repair, clean or replace as required
Use pressure wash or biodegradable cleaning
agent to clean
Adjust fan blade to 1/2" of condenser coil fi n
pack
Check diagnostic codes. Check Thermistors.
Replace as needed.
Set at higher fan speed.
Clean (See Routine Maintenance)
Check heat rise across coil. If unit operates effi
ciently, check if insulation can be added to attic
or walls. If insulation is adequate, recommend
additional unit or larger one
Check for adequate fan air across heater. Check
for open hi-limit control.
Do ohmmeter check.
Check applicable wiring diagram
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