Heat Controller RAD-81A, RAD-101A, RADS-81B manual Room AIR Conditioner Voltage Limits

Troubleshooting Guide

ROOM AIR CONDITIONER VOLTAGE LIMITS

NAME PLATE RATING	MINIMUM	MAXIMUM
115V ± 10%	103.5V	126.5V

COMPLAINT	CAUSE	REMEDY
Fan motor will not run.	No power	Check voltage at outlet. Correct if none.
	Power supply cord	Check voltage to rotary switch. If none, check
		power supply cord. Replace cord if circuit is
		open.
	Rotary switch	Check switch continuity. Refer to wiring diagram
		for terminal identification. Replace switch if
		defective.
	Wire disconnected or	Connect wire. Refer to wiring diagram for
	connection loose	terminal identification. Repair or replace loose
		terminal.
	Capacitor (Discharge	Test capacitor.
	capacitor before testing.)	Replace if not within ±10% of manufacturer's
		rating. Replace if shorted, open, or damaged.
	Will not rotate	Fan blade hitting shroud or blower wheel hitting
		scroll. Re-align assembly.
		Units using slinger ring condenser fans must
		have 0.22~0.25 inch clearance to the base.
		If necessary, shim up the bottom of the fan motor
		with mounting screw(s).
		Check fan motor bearings; if motor shaft will not
		rotate, replace the motor.
Fan motor runs.	Revolves on overload	Check voltage. See limits on this page.
		If not within limits, call an electrician.
		Test capacitor.
		Check bearings. Does the fan blade rotate
		freely?
		If not, replace fan motor.
		Pay attention to any change from high speed to
		low speed. If the speed does not change,
		replace the motor.

34Room Air Conditioner