Fault And Alert Messages

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 water heater’s control system is polarity sensitive and will lock

 

 

 

 

 

 

 

 

AC Reversed

 

 

 

out and disable heating operation if the polarity of the power supply

 

 

 

 

 

is reversed. The control system will display the “AC Reversed”

 

 

Fault occurred 2 mins ago

 

 

 

 

Power supply to water heater

 

 

Fault message on the LCD in this condition.

 

 

 

Note: Electronic flame sensing requires correct power supply

 

has reversed polarity.

 

 

 

 

 

 

 

 

 

 

 

 

 

polarity AND a proper earth ground to the water heater and the

 

 

 

 

 

 

Main Burner. The control system does not verify earth ground

 

Call a service professional:

 

 

but this should be checked first if ignition failure occurs. See the

 

 

 

 

Your Company Name Here

 

 

Ignition Failure Fault message information below.

 

 

 

 

(press [DOWN] for more....)

 

 

 

 

 

 

 

CHANGE

BACK

ADVANCED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• The control system has failed to ignite the Main Burner.

 

 

 

 

 

 

 

 

Ignition Failure

 

 

 

• Water heater is not properly grounded, loose or open ground wire

 

 

 

 

 

 

 

Fault occurred 2 mins ago

 

 

 

to the Main Burner.

 

 

 

 

 

 

The water heater has failed to

 

 

• Dirty/corroded flame sensor, clean flame sensor with fine steel

 

 

 

 

ignite the burner.

 

 

 

 

 

 

 

wool (replace if damaged).

 

 

 

 

 

 

 

 

 

 

• Loose or open wiring to the flame sensor.

 

Call a service professional:

 

 

• Loose or open wiring to the 24 V Gas Valve.

 

 

 

 

Your Company Name Here

 

 

• Supply gas turned off, low gas volume.

 

 

 

 

(press [DOWN] for more....)

 

 

 

 

 

• Intake air and/or vent piping is restricted or improperly installed.

 

 

 

 

CHANGE

BACK

ADVANCED

 

• Low or no manifold gas pressure to the Main Burner.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• The control system has detected low current (AC amps) from the

 

 

 

 

 

 

 

Low Igniter Current

 

Hot Surface Igniter. The control system monitors igniter current

 

 

and will declare this Fault condition if the current is not at or above

 

 

Fault occurred 2 mins ago

 

 

 

 

Igniter current is low.

 

 

 

the programmed minimum requirement.

 

 

 

 

• Loose or open wiring to the Hot Surface Igniter.

 

 

 

 

 

 

• Damaged, worn or open circuit Hot Surface Igniter.

 

 

 

 

 

 

Note: Hot surface igniters are wearing parts. Wear is directly

 

Call a service professional:

 

 

related to heating cycle count. Heating cycle count can be viewed

 

Your Company Name Here

 

 

in the Heater Information menu. Increasing the Differential setting

 

(press [DOWN] for more....)

 

 

reduces heating cycle count.

 

CHANGE

BACK

ADVANCED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• The control system has detected the Blocked Exhaust Switch

 

 

 

 

 

 

 

 

Blocked Exhaust

 

contacts are open.

 

 

 

• The condensate drain is blocked filling the exhaust elbow with

 

 

Fault occurred 2 mins ago

 

 

 

 

The exhaust is blocked or

 

 

 

water - clear the condensate drain.

 

 

 

 

 

restricted. Ensure

 

 

 

• Loose or open wiring to the Blocked Exhaust Switch.

 

 

 

 

 

condensate hose is draining.

 

 

• Restricted/blocked vent piping - condensate trapped in low point.

 

Call a service professional:

 

 

• Excessive equivalent pipe length, exceeded the maximum number

 

 

 

 

Your Company Name Here

 

 

of 90° elbows or wrong pipe size used in the vent piping system.

 

 

 

 

(press [DOWN] for more....)

 

 

• Excessive wind outdoors pressurizing the vent system piping.

 

 

 

 

CHANGE

BACK

ADVANCED

 

• Excessive negative air pressure in the installed space.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

54

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A.O. Smith 317443-000, 100 Power Vent DV Series 120 instruction manual AC Reversed, Fault And Alert Messages

100 Power Vent DV Series 120, 317443-000 specifications

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