Installation Manual

58
FAULT AND ALERT MESSAGES
Call the technical support phone number listed on the back cover for further technical assistance or to locate a qualied service agent
in your area.
POSSIBLE CAUSES - CHECK/REPAIR DISPLAYED FAULT/ALERT MESSAGE
• The control system has failed to ignite the Main Burner.
• Water heater is not properly grounded, loose or open ground wire
to the Main Burner - see Power Supply Connections on page 39.
• Dirty/corroded ame sensor, clean ame sensor with ne steel
wool (replace if damaged) - see Figure 2 on page 7.
• Loose or open wiring to the ame sensor.
• Loose or open wiring to the 24 VAC Gas Valve.
• Supply gas turned off, low gas volume - see page 38.
• Intake air and/or vent piping is restricted or improperly installed -
see Venting Installation on page 21.
Note: Electronic ame sensing requires a proper earth ground to the
water heater and the Main Burner. The control system does not verify
earth ground but this should be checked rst if ignition failure occurs.
CHANGE BACK
ADVANCED
Ignition Failure
Fault occurred 2 mins ago
The water heater has failed to
ignite the burner.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
• The control system has detected the Low Gas Pressure Switch
contacts are open.
• Loose or open wiring to the Low Gas Pressure Switch - see Figure
3 on page 8 for location.
• Supply gas pressure is below the required minimum pressure - see
Table 4 on page 13.
• Supply gas is turned off at the Main Shutoff Valve.
• Supply gas pressure is dropping when other gas red appliances
on a common supply gas line are operating.
• Low volume of supply gas - see Supply Gas Line Installation on
page 38 and the requirements for the Supply Gas Line on page 13
and Supply Gas Regulator on page 13.
CHANGE BACK
ADVANCED
Low Gas Pressure
Fault occurred 2 mins ago
The supply gas pressure to the
water heater is low.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
• The control system has detected the Blocked Exhaust Switch
contacts are open.
• The condensate drain is blocked lling the exhaust elbow with
water - clear the condensate drain - see Figure 9 on page 16.
• Loose or open wiring to the Blocked Exhaust Switch - see Figure 3
on page 8 for switch location.
• Restricted/blocked vent piping - condensate trapped in low point.
• Excessive equivalent pipe length, exceeded the maximum number
of 90° elbows or wrong pipe size used in the vent piping system -
see Venting Requirements on page 22.
• Excessive wind outdoors pressurizing the vent system piping.
• Excessive negative air pressure in the installed space.
CHANGE BACK
ADVANCED
Blocked Exhaust
Fault occurred 2 mins ago
The exhaust is blocked or
restricted. Ensure
condensate hose is draining.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)