WV4460E POWER VENT WATER HEATER CONTROLS
9
69-1872EF—01
TROUBLESHOOTING
Troubleshooting with LED
Indicator Assistance
1.
Observe green LED indicator on control; check and
repair the system as noted in Table 5. Error flash
codes are displayed with a 3 second pause before
repeating.
2.
After LED flash code analysis and appliance repair
are complete, turn system switch to ON and per-
form lighting procedure.
3.
Observe the ignition sequence, comparing it to the
Sequence of Operations shown in Table 4. Allow the
new ignition sequence to proceed until appliance
lights or an abnormal or unexpected event is
observed.
4.
If an unexpected event is observed, use the
Troubleshooting Guide, Fig. 9.
Table 5. Troubleshooting with the LED.
Green LED
Status
Indicates
Check/Repair
Short flash
once every four
seconds
Idle (no call for heat and no faults)
Not Applicable.
“Heartbeat”,
alternates
bright/dim
Call For Heat (no faults)
Not Applicable
Short flash
once per
second
(Idle mode)
Low flame signal on last call for heat
•
Check spark/flame sense rod for build up of silicone-
dioxide.
•
Check spark/flame sense wire insulation.
Two Flash,
three second
pause
Pressure Switch Failed Closed
•
Check Pressure Switch for welded contacts, shorted
wiring, and blockage in tubing to pressure connection.
Three Flash,
three second
pause
Pressure Switch Failed Open
•
Check Pressure Switch for contact closure.
•
Check wiring to pressure switch.
•
Check inducer motor is spinning up to speed.
•
Check venting for blockage.
Four Flash,
three second
pause
TCO Limit Lockout (water temperature in
excess of TCO)
•
Control can be reset by turning the Setpoint knob to its
minimum setting for at least 30 seconds, then
returning the Setpoint knob to the desired temp.
•
TCO Limit should not be reached under normal
operating conditions. Check installation to insure all
manufacturer recommendations were followed.
•
Reduce the setpoint temperature to keep max. water
temperature further away from TCO trip point.
Five Flash,
three second
pause
Flame Out Of Sequence
•
Check for pilot flame.
•
Replace control if pilot flame is present when gas
valve should be off.
Six-One Flash,
three second
pause
Soft Lockout - Failed Trial For Ignition
•
Check gas supply.
•
Verify air is purged from gas lines if appliance has not
run for an extended period of time.
•
If pilot flame lights, but control still enters 6-1 flash
lockout, check flame rod for silicone-dioxide build-up.
•
Check flame signal strength (if proper tools are
available).
•
If pilot lights but flame sense can not be repaired,
replace control.
Six-Two Flash,
three second
pause
Soft Lockout - Recycle Limit - PS/Limit
opened
•
Check venting to insure pressure switch is not
momentarily opening as the appliance warms.
•
Check vent outlet for wind-gust problems.
•
Check PS and Limit wiring.
Six-Three
Flash, three
second pause
Soft Lockout - Recycle Limit - Flame Lost
•
Check pilot flame to insure main flame is not lifting
pilot flame away from flame sense rod.
•
Check gas supply to insure pressure is maintained
when main burner lights.
Six-Four Flash,
three second
pause
Soft Lockout - Flame out of Sequence
Sensed
•
Check that pilot flame does not linger after valves
close.
