John Wood Envirosense Power Direct Vent (May 2010 or later) - Manuel (Page 56)

56
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 technician
in your area.
POSSIBLE CAUSES - CHECK/REPAIR DISPLAYED FAULT/ALERT MESSAGE
• The control system has detected the Blower Prover Switch
contacts are closed when they should be open at the beginning of
a heating cycle.
• Pinched/shorted Blower Prover Switch wiring.
• Jumper wire connected to the Blower Prover Switch - remove
jumper wire. Jumper wires must never be used, read all Warnings.
• Excessive wind outdoors pressurizing the vent system piping.
• Excessive negative air pressure in the installed space.
CHANGE BACK ADVANCED
Blower Prover Failure
Fault occurred 2 mins ago
The blower prover switch is
closed out of sequence.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
• The control system has detected the Blower Prover Switch
contacts are remaining open after the control system has
energized the Combustion Blower.
• Loose or open wiring to the Blower Prover Switch.
• Blower Prover Switch air sensing tube disconnected, kinked, filed
with condensate, damaged or leaking - repair or replace tube.
• Combustion Blower is not running when energized.
• Loose or open wiring to Combustion Blower.
CHANGE BACK ADVANCED
Blower Prover Open
Fault occurred 2 mins ago
The blower prover switch remains
open after the blower has been
energized.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
• The control system has detected the Blocked Intake Air Switch
contacts are open.
• Loose or open wiring to the Blocked Intake Air Switch.
• Excessive equivalent pipe length, exceeded the maximum number
of 90° elbows or wrong pipe size used in the intake air piping
system.
• Excessive negative air pressure in the installed space.
CHANGE BACK ADVANCED
Blocked Air Intake
Fault occurred 2 mins ago
The combustion air intake is
restricted.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
• The control system has detected the ECO (energy cut out) Switch
contacts are open.
• The ECO switch is a normally closed switch that opens on a
temperature rise to prevent excessive water temperature in the
storage tank. The ECO switch is inside the Temperature Probe
(two red wires).
• Loose or open wiring to the ECO switch in the Temperature Probe
- two red wires.
CHANGE BACK ADVANCED
Energy Cut Out (ECO)
Fault occurred 2 mins ago
Tank temperature is excessive.
The water heater has been
disabled.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
• The control system has not detected any voltage from the powered
anode rod.
• No water in the storage tank.
• Loose or open wiring connections to the powered anode rod.
• Powered anode rod wiring shorted to ground.
• The water heater is not properly grounded.
• Loose or open ground wires.
• Top fitting (3/4 inch bushing) of the powered anode rod was
saturated with water during installation - with power to the
water heater turned off, carefully remove anode rod and dry out
bushing(s).
* Applies to models with powered anode option.
CHANGE BACK ADVANCED
No Anode Voltage
Alert:
Alert occurred 2 mins ago
No voltage detected from
Powered Anode(s).
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)