Hatco GRH, GRAL, GRAHL, GRNH manual Troubleshooting Guide

TROUBLESHOOTING GUIDE

WARNING

To avoid any injury or damage the strip heater must only be serviced by qualified personnel.

WARNING

To avoid any injury or damage to the strip heater turn the power OFF at the disconnect switch/circuit breaker and allow to cool before performing any maintenance.

SYMPTOM	PROBABLE CAUSE		CORRECTIVE ACTION
Unit is turned “ON” but there	No power to unit.	Check circuit breaker and reset as
is no heat.		necessary. If power cord connected
		check for damage to cord. If power cord
		connected check power outlet.
	Switch is defective.	Check input and output sides of the
		switch for power. If proper power on
		supply side but nothing on output side
		replace switch.
	Wiring is open.	Check for power at the heating element.
		If no power at element check wiring for
		break or bad connection. Repair or
		replace as necessary.
	Heating element defective.	Check heating element for continuity.
		Using an ohm meter check the resistance
		of element.
		Resistance in ohms = voltage2
					wattage
		Example: GRAH-48, 120 Volt is rated for
		1100 watts.
		(120)2 =		14,400 = 13.09 ohms
			Wattage	1100
		Replace heating element if defective.
Heat is inadequate.	Unit mounted too high above	Lower unit, putting effective heat closer
	target area.	to target.
	Excessive air movement	Restrict or redirect air movement (ie. - air
	around strip heater target	conditioning duct or exhaust fan) away
	area.	from unit.
	Incorrect power supply (low).	Check power supply to unit, making sure
		it matches rating on the unit. If power
		supply is incorrect, change to match
		rating on unit.

Form No. GRM-0707 22