Friedrich 2007 service manual Sublimation

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

Problem		Possible Cause	Action
	Sublimation:	When	Ensure that foam gaskets are installed in
			between window panes & in between the unit &
	unconditioned saturated, outside air mixes with
			the sleeve. Also, ensure that fresh air/exhaust
	conditioned air, condensation forms on the cooler
			vents (on applicable models) are in the closed
	surfaces
Water "spitting"			position & are in tact
into room			Follow installation instructions to ensure that
	Downward pitch of installation is too steep		downward pitch of installed unit is no less than
			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	Action
	Insufficient air circulation thru area to be air	Adjust louvers for best possible air circulation
	conditioned
Excessive moisture	Oversized unit	Operate in "MoneySaver" position
	Inadequate vapor barrier in building structure,	Advise customer
	particularly floors

Problem	Possible Cause	Action
	T-stat differential too narrow	Replace t-stat
T-stat short cycles	Plenum gasket not sealing, allowing discharge air	Check gasket. Reposition or replace as needed
	to short cycle t-stat
	Restricted coil or dirty filter	Clean & advise customer of periodic cleaning &
		maintenance needs of entire unit

Problem	Possible Cause	Action
	Anticipator (resistor) wire disconnected at t-stat	Refer to appropriate wiring diagram
	or system switch
Prolonged off		Disconnect plus from outlet. Remove resistor
		from bracket. Insert plug & depress "COOL"
cycles (automatic
	Anticipator (resistor) shorted or open	& "FAN AUTOMATIC" buttons. Place t-stat to
operation)
		warmest setting. Feel resistor for temperature. If
		no heat, replace resistor
	Partial loss of charge in t-stat bulb causing a wide	Replace t-stat
	differential

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

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