American Water Heater HCG3 130T 300 instruction manual Blower Prover Failure

Fault And Alert Messages (cont)

Call the technical support phone number listed on the back cover for further technical assistance or to locate a qualified service agent in your area.

Possible Causes - Check/Repair	Displayed Fault/Alert Message
• The control system has detected the Blower Prover Switch
	Blower Prover Failure
contacts are closed when they should be open at the beginning of
a heating cycle - see the Sequence Of Operation on page 59.		Fault occurred 2 mins ago
• Pinched/shorted Blower Prover Switch wiring - see Figure 3 on	The blower prover switch is
	closed out of sequence.
page 8 for switch location.
• Jumper wire connected to the Blower Prover Switch - remove
jumper wire. Jumper wires must never be used, read all Warnings	Call a service professional:
on page 57.	Your Company Name Here
• Excessive wind outdoors pressurizing the vent system piping.	(press [DOWN] for more....)
• Excessive negative air pressure in the installed space.	CHANGE	BACK	ADVANCED
• The control system has detected the Blower Prover Switch
contacts are remaining open after the control system has	Blower Prover Open
energized the Combustion Blower - see the Sequence Of
		Fault occurred 2 mins ago
Operation on page 59.
	The blower prover switch remains
• Loose or open wiring to the Blower Prover Switch - see Figure 3 on
	open after the blower has been
page 8 for switch location.	energized.
• Blower Prover Switch air sensing tube disconnected, kinked, filed	Call a service professional:
with condensate, damaged or leaking - repair or replace tube.
• Combustion Blower is not running when energized.	Your Company Name Here
	(press [DOWN] for more....)
• Loose or open wiring to Combustion Blower.
	CHANGE	BACK	ADVANCED
• Loose, open, incorrect wiring to the VFD on AHCG3 130T 400
models - see Figure 3 on page 8 and the wiring diagram on page 65.
• The control system has detected the Blocked Intake Air Switch
	Blocked Air Intake
contacts are open.
• Loose or open wiring to the Blocked Intake Air Switch - see Figure		Fault occurred 2 mins ago
	The combustion air intake is
3 on page 8 for switch location.
• Excessive equivalent pipe length, exceeded the maximum number	restricted.
of 90° elbows or wrong pipe size used in the intake air piping
system - see Venting Requirements on page 22.	Call a service professional:
• Balance plate and/or intake air screen was not removed prior to	Your Company Name Here
connecting the intake air piping to the water heater and is clogged/	(press [DOWN] for more....)
blocked with debris - see Figure 17 on page 24.	CHANGE	BACK	ADVANCED
• Excessive negative air pressure in the installed space.
• The control system has detected the ECO (energy cut out) Switch
contacts are open.
	Energy Cut Out (ECO)
• The ECO switch is a normally closed switch that opens on a
temperature rise to prevent excessive water temperature in the		Fault occurred 2 mins ago
	Tank temperature is excessive.
storage tank. The ECO switch is inside the Upper Temperature
Probe (two red wires) - see Figure 3 on page 8 for Upper Probe	The water heater has been
	disabled.
location.
• Loose or open wiring to the ECO switch in the Upper Temperature	Call a service professional:
Probe - two red wires.	Your Company Name Here
• Improper water system piping and/or excessively high return	(press [DOWN] for more....)
(recirculation) loop water temperature - see the Water Piping	CHANGE	BACK	ADVANCED
Diagrams beginning on page 67.
• The control system has not detected any voltage from the powered
anode rods - see Figure 3 on page 8 for location.
		Alert:
• No water in the storage tank.
		No Anode Voltage
• Loose or open wiring connections to the powered anode rods - see
		Alert occurred 2 mins ago
Figure 3 on page 8 for location.	No voltage detected from
• Powered anode rod wiring shorted to ground.	Powered Anode(s).
• The water heater is not properly grounded - see Power Supply
Connections on page 39.	Call a service professional:
• Loose or open ground wires.	Your Company Name Here
• Top fitting (3/4 inch bushing) of the powered anode rods were	(press [DOWN] for more....)
	CHANGE	BACK	ADVANCED
saturated with water during installation - with power to the water
heater turned off, carefully remove anode rods and dry out
bushing(s).

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