John Wood Envirosense Power Direct Vent (May 2010 or later) - Manuel (Page 55)

55
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 technician
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.
• Dirty/corroded flame sensor, clean flame sensor with fine steel
wool (replace if damaged).
• Loose or open wiring to the flame sensor.
• Loose or open wiring to the 24 V Gas Control Valve.
• Supply gas turned off, low gas volume.
• Intake air and/or vent piping is restricted or improperly installed.
• Low or no manifold gas pressure to the Main Burner.
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 Blocked Exhaust Switch
contacts are open.
• The condensate drain is blocked filling the exhaust elbow with
water - clear the condensate drain.
• Loose or open wiring to the Blocked Exhaust Switch.
• 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.
• 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....)