To equalize before attempting to restart. Instruct

Problem	Possible Cause	Action
	Overload inoperative. Opens too soon	Check operation of unit. Replace overload if
	Overload inoperative. Opens too soon	system operation is satisfactory
		system operation is satisfactory
	Compressor restarted before system pressures	Allow a minimum of 2 minutes to allow pressures
	Compressor restarted before system pressures	to equalize before attempting to restart. Instruct
	equalized	to equalize before attempting to restart. Instruct
	equalized	customer of waiting period
		customer of waiting period
		Check voltage with unit operating. Check for
Compressor runs for	Low or ﬂuctuating voltage	other appliances on circuit. Air conditioner should
Compressor runs for	Low or ﬂuctuating voltage	be in separate circuit for proper voltage & fused
short periods only.		separately
Cycles on overload
Cycles on overload	Incorrect wiring	Refer to appropriate wiring diagram
	Incorrect wiring	Refer to appropriate wiring diagram
	Shorted or incorrect capacitor	Check by substituting a known good capacitor of
	Shorted or incorrect capacitor	correct rating
		correct rating
	Restricted or low air ﬂow through condenser coil	Check for proper fan speed or blocked
	Restricted or low air ﬂow through condenser coil	condenser
		condenser
	Compressor running abnormally hot	Check for kinked discharge line or restricted
	Compressor running abnormally hot	condenser. Check amperage
		condenser. Check amperage

Problem	Possible Cause	Action
	Loss of charge in t-stat bulb	Place jumper across t-stat terminals to check if
T-stat does not	Loss of charge in t-stat bulb	unit operates. If unit operates, replace t-stat.
T-stat does not		unit operates. If unit operates, replace t-stat.
turn unit on	Loose or broken parts in t-stat	Check as above
	Incorrect wiring	Refer to appropriate wiring diagram

Problem	Possible Cause	Action
	Poorly installed	Refer to Installation Manual for proper installation

	Fan blade striking chassis	Reposition - adjust motor mount
Noisy operation		Check that compressor grommets have not
Noisy operation	Compressor vibrating	deteriorated. Check that compressor mounting
	Compressor vibrating	deteriorated. Check that compressor mounting
		parts are not missing
	Improperly mounted or loose cabinet parts	Check assembly & parts for looseness, rubbing
	Improperly mounted or loose cabinet parts	& rattling
		& rattling

Problem	Possible Cause	Action
	Evaporator drain pan overﬂowing	Clean obstructed drain trough
	Condensation forming on base pan	Evaporator drain pan broken or cracked. Reseal
	Condensation forming on base pan	or replace
		or replace
	Poor installation resulting in rain entering the	Check installation instructions. Reseal as
Water leaks into the	room	required
room	Condensation on discharge grille louvers	Clean the dirty evaporator coil. Use pressure
	Condensation on discharge grille louvers	wash or biodegradable cleaning agent to clean
		wash or biodegradable cleaning agent to clean
	Chassis gasket not installed	Install gasket, per Installation manual
	Downward slope of unit is too steep	Refer to installation manual for proper installation

Friedrich 2007 service manual To equalize before attempting to restart. Instruct