Friedrich Kuhl KCS12B10A Service Manual page 58

COMPLAINT
Water "spitting" into room
Excessive moisture
Unit short cycles
Prolonged off cycles
Outside water leaks
58
TROUBLESHOOTING
CAUSE
Sublimation:
When unconditioned saturated,
outside air mixes with conditioned
air, condensation forms on the cooler
surfaces
Downward pitch of installation is too
steep towards back of unit
Restricted coil or dirty filter
Insufficient air circulation thru area to
be air conditioned
Inadequate vapor barrier in building
structure; particularly floors.
Defective thermistor
Unit oversized
Chassis seal gasket not sealing or
absent causing unit to short cycle
Restricted coil or dirty filter
Defective indoor ambient thermistor or
electronic control board
Evaporator drain pan cracked or
obstructed
Obstructed condenser coil
Fan blade/ slinger ring improperly
positioned
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 fin pack