State Industries GP650HTPDT Fault Messages, “AC Reversed”, “Upper Probe Open”, Displayed Message

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

FAULT MESSAGES

DISPLAYED MESSAGE	CHECK/REPAIR
CONDITION/INDICATES
“AC Reversed”	• Check incoming power supply wiring to the
	water heater in the junction box - ensure that
The control system has detected the power supply	the hot wire is connected to the water heater’s
	black wire and the neutral wire is connected to
polarity is reversed.
	the water heater’s white wire inside the junction
	box. See electrical requirements on page 8.
	• Check for 120 VAC at CCB’s J3 Socket (page
	36) pins 1 & 3 with J3 plug inserted, power on.
	Check for AC voltage between pin 1 and ground
	- should indicate 120 VAC.
	Check for AC voltage between pin 3 and ground
	- should indicate 0 VAC.
	• 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.
“Upper Probe Open”	• Check Temperature Probe plug and socket con-
	nection at CCB’s J7 Socket (page 36). Perform
The control system has detected over 56,000 ohms	close visual inspection of the pins inside the
	plug and socket - ensure plugs and sockets are
from the Temperature Probe on top of the water
	mating properly and providing good contact.
heater.
	• Check all wiring between the Temperature
	Probe and the J7 Socket on the CCB. Repair/
	replace anything worn or damaged.
	• Unplug J7 plug from CCB, check resistance
	between the two black wires in the plug end with
	an ohm meter. If resistance is above 56,000
	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.

Technical Literature Department	43 of 52	Ashland City, TN © 2008
Servicing should only be performed by a Qualified Service Agent