Friedrich R-410A service manual Problem

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

Problem	Possible Cause	Possible Solution
	Sublimation:	Ensure that foam gaskets are installed in
	When unconditioned saturated,	between window panes & in between the
	outside air mixes with conditioned	unit & the sleeve. Also, ensure that fresh
	air, condensation forms on the	air/exhaust vents (on applicable models) are in
Water “spitting”	cooler surfaces	the closed position & are in tact
into room	Downward pitch of installation is	Follow installation instructions to ensure that
		downward pitch of installed unit is no less than
	too steep towards back of unit
		1/4” & no more than 3/8”
	Restricted coil or dirty filter	Clean & advise customer of periodic cleaning
		& maintenance needs of entire unit

Problem	Possible Cause	Possible Solution
	Insufficient air circulation thru area	Adjust louvers for best possible air circulation
	to be air conditioned
Excessive
	Oversized unit	Operate in “MoneySaver” position
moisture
	Inadequate vapor barrier in building	Advise customer
	structure, particularly floors

Problem	Possible Cause	Possible Solution
	Defective thermistor	Replace thermistor or electronic control board
	Unit oversized	See sizing chart. Correct as needed.
Unit	Chassis seal gasket not sealing or	Check gasket. Reposition or replace as
short cycles
	absent causting unit to short cycle	needed
	Restricted coil or dirty filter	Clean & advise customer of periodic cleaning
		& maintenance needs of entire unit

Problem	Possible Cause	Possible Solution
	Defective indoor ambient thermistor	Check alarms. Replace thermistor or electronic
Prolonged off	or electronic control board	control board
cycles
	Defective remote wall t-stat	Replace t-stat

Problem	Possible Cause	Possible Solution
	Evaporator drain pan cracked or	Repair, clean or replace as required
	obstructed
	Water in compressor area	Detach shroud from pan & coil. Clean &
Outside water		remove old sealer. Reseal, reinstall & check
leaks	Obstructed condenser coil	Use pressure wash or biodegradable cleaning
		agent to clean
	Fan blade/slinger ring improperly	Adjust fan blade to 1/2” of condenser coil fin
	positioned	pack

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