Heat Controller RAD-101A, RAD-81A, RADS-81B manual Troubleshooting Guide

Troubleshooting Guide

COMPLAINT	CAUSE	REMEDY
Compressor cycles on	Voltage	Check the voltage. See the limits on the
overload.		preceding 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.)
Compressor cycles on	Fan motor	If not running, determine the cause. Replace if
overload.		required.
	Condenser air flow	Remove the cabinet, inspect the interior surface
	restriction	of the condenser. If restricted, clean carefully
		with a vacuum cleaner (do not damage fins) or
		brush. Clean the interior base before
		re-assembling.
	Condenser fins	If the condenser fins are closed over a large
	(damaged)	area on the coil surface, head pressures will
		increase, causing the compressor to cycle.
		Straighten the fins or replace the coil.
	Capacitor	Test the capacitor.
	Wiring	Check the terminals. If loose, repair or replace.
	Refrigeration system	Check the system for a restriction.
Insufficient cooling	Air filter	If restricted, clean or replace.
	Unit undersized	Determine if the unit is properly sized for the
		area to be cooled.
Excessive noise	Blower or fan	Check the set screw, or clamp. If loose or miss-
		ing, correct. If the blower or fan is hitting scroll
		or barrier, rearrange the air handling parts.
	Copper tubing	Remove the cabinet and carefully rearrange the
		tubing not to contact the cabinet,
		compressor, shroud, and barrier.

36Room Air Conditioner