Friedrich ZQ10 A10B manual Complaint, Cause, Remedy, Fan motor noise

COMPLAINT	CAUSE	REMEDY
Fan motor noise.	Fan	If cracked, out of balance, or partially missing,
		replace it.
	Blower	If cracked, out of balance, or partially missing,
		replace it.
	Loose set screw	Tighten it.
	Worn bearings	If knocking sounds continue when running or loose,
		replace the motor. If the motor hums or noise
		appears to be internal while running, replace motor.
Compressor will not run,	Voltage	Check voltage. See the limits on the preceding page.
fan motor runs.		If not within limits, call an electrician.
	Wiring	Check the wire connections ; if loose, repair or
		replace the terminal. If the wires are disconnected,
		refer to wiring diagram for identification, and replace
		the wires. Check the wire connections ; if not
		according to the wiring diagram, correct the
		connections.
	Rotary	Check for continuity, refer to the wiring diagram for
		terminal identification. Replace the switch if the
		circuit is open.
	Thermostat	Check the position of knob. If not at the coldest
		setting, advance the knob to this setting and restart
		the unit.
		Check the continuity of the thermostat. Replace the
		thermostat if the circuit is open.
	Capacitor (Discharge	Check the capacitor.
	capacitor before	Replace if not within ±10% of manufacturer's rating,
	servicing.)	replace if shorted, open, or damaged.
	Compressor	Check the compressor for open circuit or graond. If
		open or grounded, replace the compressor.
	Overload	Check the compressor overload if externally
		mounted.
		Replace if open. (If the compressor temperature is
		high, remove the overload, cool and retest.)
Compressor cycles on	Voltage	Check the voltage. See the limits on the preceding
overload.		page. If voltage is not within these limits, call an
		electrician.
	Overload	Check overload, if externally mounted.
		Replace if open. (If the compressor temperature is
		high, remove the overload, cool, and retest.)

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