42
WHL-004 REV. 12.17.14
PROBLEM
POSSIBLE CAUSES
POSSIBLE REMEDIES
White “smoke” can
be seen coming out
of the exterior
exhaust gas vent.
Depending on the outside temperature, water vapor
can be produced as the exhaust is vented.
This is normal operation
– no action is required.
Table 24
– Troubleshooting Chart
DIAGNOSTICS AND SUGGESTED CORRECTIVE ACTIONS
The water heater control is able to record information about the water heater’s condition at the time of the ten previous faults or errors.
This information is available to view in the Installer Mode under the History screen.
The following screens may be displayed when reviewing the water heater history. The table below also includes diagnostic information
and possible corrective actions.
Display
Condition
Diagnostic
Possible Corrective Actions
Nothing appears
on the display
control panel but
the fan runs at full
speed
Control is not
receiving power
Check wiring for short circuit or incorrect
wiring
Correct wiring per wiring diagram including
connection of transformer to the control
Check transformer connection to the
control per wiring diagram. Check for
14V output of panel wire
Push the Power button on the control panel
Nothing appears
on the display
control panel and
no other water
heater
components are
operating
Control is not
receiving 120V power
Ensure service switch and/or circuit
breaker to water heater is turned ON
Turn on service switch or circuit breaker to
power water heater
Is there 120V at the service switch
Troubleshoot and correct the power supply
to the manual switch
Is the ON/OFF switch inside the water
heater cabinet is turned on
Turn ON the manual power switch inside the
water heater cabinet
Check for 120V at the line voltage
terminal block located inside the water
heater cabinet
Correct wiring inside the water heater
cabinet using the wiring diagram in the
installation manual
Inspect the fuse. Replace as necessary
Replace the fuse with the proper part found
in the replacement part section of this
manual. If fuse blows again, recheck the
wiring per diagram
Nothing appears
on the display
control panel, but
the water heater is
operating
Occurs when
communications is
lost from the control
to the display
Check for loose connections and proper
pin alignment / engagement on the
control’s plug
Check for continuity on the wire harness
from the display to the control. See repair
parts section for proper replacement part.
Cycle power off and on using water
heater power switch and check for
operation
Replace with new display module. See
repair parts section for proper replacement
part.
Table 25
–Diagnostics and Suggested Corrective Actions
PART 13 – MAINTENANCE PROCEDURES
The water heater must be inspected and serviced annually, preferably at the start of the heating season, by a qualified service
technician. In addition, the maintenance and care of the water heater as outlined in this manual must be performed by the user/owner to
assure maximum efficiency and reliability. Follow the maintenance procedures given throughout this manual. Failure to perform the
service and maintenance or follow the directions in this manual could damage the water heater or system components, resulting in
substantial property damage, severe personal injury, or death.
Check the Surrounding Area
To prevent the potential of substantial property damage, severe personal injury, or death, eliminate all the materials listed in
Error!
eference source not found.
from the area surrounding the water heater and the vicinity of the combustion air intake. If contaminates
are found:
Remove products immediately from area.
If contaminates have been there for an extended period, call a qualified service technician to inspect the water heater for
possible damage from acid corrosion.
If products cannot be removed, immediately call a qualified service technician to re-pipe the combustion air intake piping away from the
contaminated areas.
