Friedrich R-410A service manual Troubleshooting, Defective switch On-Off

TROUBLESHOOTING

PROBLEM	POSSIBLE CAUSE	POSSIBLE SOLUTION
	Defective switch (On-Off)	Check continuity across terminals 2 and 3.
	Fan capacitor open.	Test with capacitor analyzer. Replace if bad.
	Inoperative fan motor.	Check power and if okay, perform continuity test.
		Replace if bad.
Fan motor does
	Incorrect wiring of fan circuit.	Connect per wiring diagram.
not run.
	Solid state relay open.	Replace relay.
	Seized motor bearings.	Replace motor.
	Bound fan blade or blower wheel.	Adjust for proper clearance.
PROBLEM	POSSIBLE CAUSE	POSSIBLE SOLUTION
Switch (On-Off)	Defective (On-Off) switch or
does not cut fan		Replace switch or relay.
	defective relay.
motor off.
PROBLEM	POSSIBLE CAUSE
	Poor installation.	Refer to installation instructions for proper
		installation.
	Fan blade striking chassis or	Adjust fan blade or blower wheel clearance.
	blower wheel housing.
Noisy and/or
		Check for deteriorated compressor grommets.
vibration.	Compressor vibrating.
		Replace as needed.
	Loose cabinet parts, improperly
	mounted components, tubing	Adjust and tighten as required.
	rubbing.
PROBLEM	POSSIBLE CAUSE	POSSIBLE SOLUTION
	Evaporator drain pan overflowing.	Clean obstructed drain trough.
Water leaks into	Condensation forming on bottom of	Evaporator drain pan broken or cracked. Replace
	base pan.	chassis seal gasket missing or defective.
room.
	Water dripping from discharge air	Dirty evaporator coil, or extremely high humidity
	grilles.	conditions. Clean coil or check application.
PROBLEM	POSSIBLE CAUSE	POSSIBLE SOLUTION
	Extremely high humid conditions.	Install 01900-235 drain kit.
	Water in center section of base pan	Drain trough. Check level. Ensure 1/4” tilt toward
Excessive water	(compressor area).	rear.
leaks outside.	Dirty condenser coil.	Clean with steam or detergent.
	Fan blade and slinger ring	Adjust fan blade to 1/2” clearance from condenser
	improperly positioned.	coil.

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