Hatco IMPERIAL "S manual Troubleshooting

TROUBLESHOOTING

WARNING

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

WARNING

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

SYMPTOM	PROBABLE CAUSE	CORRECTIVE ACTION
Water at dishmachine is not	Gauge(s) not working	Check temperature of water with
	properly.	a thermometer to be certain gauges
at the proper temperature.
		are working correctly. If not, replace
		gauge(s).
	Thermostat set too low.	Adjust or recalibrate (page 27). If
		thermostat will not recalibrate properly,
		replace it.
	Booster heater has more than	If located farther than (5) linear feet
	(5) linear feet (1524 mm) of	(1524 mm), pipes should be wrapped in
	water pipe to the dishwasher,	insulation, and/or a recirculating system
	causing the water to cool off	installed.
	inside the pipe.
Heating elements burn out.	Tank inadvertently	Make sure tank is full of water
	drained leaving elements	at all times. Check low water cut-off
	in a dry condition.	system for proper operation.
	Lime buildup in tank causing	Clean or delime tanks periodically. A water
	elements to split and burn out.	softener or blended phosphate treatment
		system may be required.
Relief valve dribbles.	No pressure reducing valve	A pressure reducing valve with high
	installed or incorrect valve	pressure bypass must be installed in the
	installed causing pressure	incoming water line to allow water to
	build-up inside booster tank.	expand back into the feed line.
	Bypass in pressure reducing	Clean bypass or replace with new valve
	valve may be blocked.	with built in bypass.
	Check valve or anti-siphon	Remove check valve or anti-siphon valve
	valve installed in the feed line.	to allow for water expansion or install a
		back pressure relief valve on the incoming
		water line, Hatco part number
		03.02.039.00.
Relief valve opens.	Unit is overheating.	Thermostat may be set too high
		or is sticking. Recalibrate (page 27)
		or replace the thermostat.
	Contactor may be sticking in	Replace contactor(s).
	closed position not allowing
	unit to cycle off.

Form No. EBOOSTERM-0406 32