State Industries SHE50-100PE, SHE50-100NE, GP650HTPDT manual Flame Probe Short, Upper Probe Short

ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL

FAULT MESSAGES (CONT)

DISPLAYED MESSAGE	CHECK/REPAIR
CONDITION/INDICATES
“Upper Probe Short”	• Check all wiring between the Temperature
	Probe and the J7 Socket on the CCB (page 36).
The control system has detected less than 390	Repair/replace anything worn or damaged.
ohms from the Temperature Probe on top of the	• Unplug J7 plug from CCB, check resistance
water heater.	between the two black wires in the plug end with
	an ohm meter. If resistance is at or below 390
	ohms - replace the Temperature Probe.
	• Call the technical support phone number shown
	on the water heater labeling for further assis-
	tance if the problem has not been corrected
	after performing the procedures outlined here.

“Flame Probe Short”	• Disconnect the wire from the flame sensor (see
	pages 12 and 24). Check for continuity between
The control system has detected that the flame	flame sensor and ground with an ohm meter.
	There should be no continuity - infinite resis-
sensor is grounded.
	tance.
	• If above test indicates there is continuity
	between the flame sensor and ground - remove
	the flame sensor (see pages 12 and 24). Ensure
	the flame sensor is not bent and touching the
	burner.
	• Check all flame sensor wiring between the
	flame sensor and the J4 male spade connector
	on the CCB (page 36). Ensure there are not any
	pinched wires or shorts - repair/replace anything
	worn or damaged.
	• Replace the flame sensor.
	• Call the technical support phone number shown
	on the water heater labeling for further assis-
	tance if the problem has not been corrected
	after performing the procedures outlined here.

Technical Literature Department	44 of 52	Ashland City, TN © 2008
Servicing should only be performed by a Qualified Service Agent