Friedrich 60 Hz manual Troubleshooting, Problem, Possible Cause, To Correct

TROUBLESHOOTING

PROBLEM	POSSIBLE CAUSE	TO CORRECT
	Power disconnected.	Check power source.
	System switch in “Off” position.	Set switch correctly.
	Branch circuit fuse blown or	Replace fuse, reset breaker. If repeats, check fuse or breaker
UNIT DOES NOT RUN.	circuit breaker tripped.	size. Check for shorts in unit wiring and components.
	Inoperative system switch.	Test for continuity.
	Loose or disconnected wiring	Check wiring and connections.
	at switch.	Connect per wiring diagram.
	Inoperative switch (On-Off).	Test for continuity, 3 and 2, 5 and 6.
	Dirty Filter.	Clean as recommended in Owner’s Manual.
	Restricted air flow.	Check for dirty or obstructed coil - clean as required.
	Inoperative thermostat.	Test for shorted thermostat or stuck contacts.
EVAPORATOR COIL	Short of refrigerant.	De-ice coil and check for leak.
FREEZES UP.
		De-ice coil. Check temperature differential across coil. Touch
	Partially restricted capillary.	test coil return bends for same temperature. Test for low
		running current.
	Inoperative fan motor.	Test and replace if inoperative.
	Excessive heat load.	Test cooling performance of unit. Unit undersized.
	Restriction in line.	Check for partially iced coil. Check temperature split across
COMPRESSOR RUNS		coil.
		Check for presence of oil on silver soldered connections.
CONTINUALLY.	Refrigerant leak.
DOES NOT CYCLE OFF.		Check for partially iced coil. Check split across coil. Check for
		low running amperage.
	Thermostat contacts stuck.	Check operation of thermostat. Replace if contacts remain
		closed.
	Loss of charge in thermostat	Place jumper across thermostat terminals. If unit operates,
	bulb.	replace thermostat.
THERMOSTAT DOES	Loose or broken parts in	Check as above.
NOT TURN UNIT ON.	thermostat.
	Incorrect wiring.	Connect per wiring diagram.
	System switch open.	Test for continuity at switch terminals 2 and 3.
	Thermostat set at coldest point	Turn to highest temperature setting to see of unit will cycle off.
THERMOSTAT DOES	Thermostat contacts stuck.	Disconnect power to the unit. Remove cover of thermostat
		and check if contact is stuck, if so replace thermostat.
NOT TURN UNIT OFF.
	Switch (On - Off) shorted.	Test switch for open contacts at terminals 2 and 3 with switch
		in “Off” position.

8