Frymaster H50 Series manual Problem, Probable Causes, Corrective Action, Check

PROBLEM			PROBABLE CAUSES		CORRECTIVE ACTION
			A. Failed 24V transformer.		A. If the wiring and connections be-
			Check: LED 3 (24V) is not lit		tween the 24V transformer and
					the interface board are intact, re-
			continuously.		place the transformer.
			B. Failed interface board.
			Check 1:	LED 3 (24V) is lit
			continuously, but 24 VAC is not
			present on the right PWR terminal
			(LED 4)	(and/or the left PWR	B. Replace the interface board.
	24V circuit is		terminal (LED 2), if dual-vat).
			Check 2:
		suspect.		24VAC is present on
			V1s (or V1D and V2D, if dual
NOTE:	All	voltage	vat).
measurements		must be	C. Open or failed drain safety switch.
made within 4 seconds
of the controller calling			Check: If 24VAC is present on
for heat. If the burners					C. Adjust or replace the drain safety
			the gas valve main coil (PV ter-
do not	fire within 4
			minal) (on both PV terminals, if		switch as appropriate.
seconds,	the	ignition
			dual-vat),	check the connections
modules	will	lock out
			and the continuity of the drain
and the controller must
be turned off and then			safety switch.
back on to reset them.			D. Failed high limit.
			Check: If 24VAC is present on		D. If the high limit is open, replace.
			the gas valve main coil (PV ter-
			minal) (on both PV terminals, if
			dual-vat), check the continuity of
			the high limit.
			E. Failed ignition module.		E. If the fuse in the ignition module
			Check: 24VAC is not present on
					is not blown, replace the ignition
			V1S (or V1D and V2D, if dual		module.
			vat).

Refer also to the diagrams of the 24 Volt Circuit on the following pages.

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