Table of Contents
Advertisement
FAULT AND ALERT CONDITIONS
FAULT CONDITIONS
When the control system declares a Fault condition it will display a
Fault message on the control system's LCD with an exclamation "!"
mark. The control system will lock out and disable heating operation
until the condition is corrected. The water heater must be serviced
by a qualified service technician before operation can be restored.
ALERT CONDITIONS
When the control system declares an Alert condition it will display
an Alert message on the control system's LCD with a question "?"
mark. The water heater will continue to operate during an Alert
condition but the water heater must be serviced by a qualified
service technician as soon as possible.
RESETTING CONTROL SYSTEM LOCK OUTS
To reset the control system from a lock out condition; turn off the
switch in front of the unit for approximately 20 seconds and then
back on. Keep in mind: if the condition that caused the Fault has
not been corrected, the control system will continue to lock out.
DIAGNOSTIC CHECKS
Electrical Shock Hazard
•
Turn off power to the water heater
before performing any service.
•
Label all wires prior to disconnecting
when performing service. Wiring errors
can cause improper and dangerous
operation.
•
Verify proper operation after servicing.
•
Failure to follow these instructions can
result in personal injury or death.
The following section, Fault And Alert Messages lists some of the
messages the control system will display on the LCD when there
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
• Using a manometer, ensure that gas supply pressure is above
minimum requirement listed on heater's data plate and does not
drop more than 1.5" W.C. when unit fires.
• Ensure wire connections to gas valve are clean and tight.
• Ensure wire connections to flame sensor are clean and tight.
• Ensure wire connections to spark igniter are clean and tight.
• Inspect flame sensor, clean/replace as needed.
• Inspect spark igniter, realign igniter gap as needed
• Ensure adequate electrical ground to heater.
• If Blocked Exhaust error occurs when blower is running, check for
restrictions in exhaust pipe, including exhaust elbow, condensate
drain, and outside termination. Also check exhaust pipe installation
(size/length) per manual.
• If Blocked Exhaust error occurs before blower runs, make sure
pressure switch connections are clean and tight. Check pressure
switch continuity/resistance. Switch should be closed (continuity/0
ohms). Replace switch if open (no continuity).
• Other possible causes: high wind conditions and excessive
negative air pressure in building.
are operational problems. This is not a complete list. Along with
each of the Fault and Alert messages described there will be a list
of possible causes and things to check and repair.
Only qualified service technician, as defined in Qualifications using
appropriate test equipment, should perform any service procedures
on the water heater.
NOTE: If you are not qualified and licensed or certified as required
by the authority having jurisdiction to perform a given task do not
attempt to perform any of the diagnostic or service procedures
described in the following section.
If you do not understand the instructions in the following section do
not attempt to perform any procedures.
Call the technical support phone number listed on the water heater
labeling for further technical assistance or to locate a qualified
service technician in your area.
Displayed Fault/Alert Message
Ignition Failure
0 days 0 hrs 0 mins ago
Error Code: B2-70
Flame not detected. Clean flame
rod. Check gas supply.
Press the Advanced button for
more information
Blocked Exhaust
0 days 0 hrs 0 mins ago
Error Code: A8-1201
Restriction in exhaust pipe.
Check exhaust pipe and
termination for blockage.
Press the Advanced button for
59
BACK
ADVANCED
BACK
ADVANCED
Advertisement
Table of Contents
