Vulcan-Hart VC4ES, VCIEC, VC6ED, VC6EC Computer Control Models Only, Symptoms, Possible Causes

FULL SIZE ELECTRIC CONVECTION OVENS - TROUBLESHOOTING

SYMPTOMS		POSSIBLE CAUSES
No power to oven controls.	1.	Main circuit breaker OPEN.
	2.	Control circuit fuses OPEN.
	3.	Power switch (S1) inoperative.
	4.	Transformer (T2) inoperative (480V only).
No heat, convection fan motor runs.	1.	High limit thermostat OPEN.
	2.	Heating element malfunction.
	3.	Contactor malfunction.
	4.	Temperature control malfunction.
No power to temperature control.	1.	Power switch (S1) in “Cool Down”.
	2.	Door or door switch open.
Door does not seal or shut properly	1.	Doors out of adjustment.
	2.	Door chain out of adjustment or broken
		(simultaneous doors).
	3.	Door catch roller out of adjustment or broken
		(independent doors).
	4.	Door seals damaged.

COMPUTER CONTROL MODELS ONLY

SYMPTOM		POSSIBLE CAUSES
Oven does not heat.	1.	High limit switch open.
	2.	Temperature probe malfunction.
	3.	Computer control malfunction.
High limit thermostat shutting OFF heat.	1.	Temperature probe malfunction.
	2.	Computer control malfunction.
Oven not hot enough.	1.	Temperature probe malfunction.
	2.	Computer control range high (rH1) setting to low. See
		"SETUP MODE" under "COMPUTER CONTROL)".
	3.	Computer control malfunction.
Blower motor doesn’t run with power	1.	Line voltage incorrect.
switch in “ON” or "COOL DOWN” position.	2.	Power switch (S1) malfunction.
	3.	Fan speed switch (S3) malfunction.
	4.	Solid sate relay (SSR) malfunction. See "SOLID STATE
		RELAY TEST" under "COMPUTER CONTROL".
	5.	Interconnecting wiring malfunction.
	6.	Motor inoperative.
	7.	Computer control malfunction. See "COMPUTER
		CONTROL OPERATIONAL TEST".

Page 57 of 60 F25105 (December 2001)