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WV8860C WATER HEATER CONTROLS
flashes of the status indicator after a three second
pause. One single flash indicates that the control is
in normal operation.
2. Observe status indicator on control; check and
repair the system as noted in Table 3 on page 6.
Flash codes are displayed with a three-second delay
between cycles. A continuous solid light indicates
system shutdown when knob is turned from a
temperature setting to OFF position. When the solid
light is present, the pilot and main valve will not
hold. When the status indicator goes out, the user
can restart the system. (Approximate shutdown
time is one minute.)
LED Error
1,2
Code
Normal
1 flash
operation.
every 3
knob in
seconds
PILOT
position.
Normal
1 flash
operation.
every 3
knob in
seconds
HEAT
position.
Action
2 flashes
required.
3 flashes
4 flashes
5 flashes
6 flashes
7 flashes
8 flashes
9 flashes
10 flashes
Solid ON
1
Maximum two different errors can be displayed simultaneously if more than one error has been detected.
2
Error codes are indicated by a red LED.
3
LED Error Codes are flashed once per second, with a three-second pause between repeating the error code.
34-00019—03
Table 3. Troubleshooting with status light visual indication.
Number of LED Flashes
3. After status indicator analysis and appliance repair
is complete, turn device knob to OFF, wait until the
indicator goes out, then perform lighting
procedure.
4. Status indicator light should be in normal mode
(1 flash) with the knob in the PILOT position. Turn
the device knob past the water temperature in the
tank should turn on the main burner. The Status
indicator light should continue to blink once every
three seconds when there is a call for heat.
5. In the event of multiple failure codes, the next
failure code follows the previous failure code by
approximately three seconds with higher flash
count first.
3
Detected Failure
Not an error; indicates the
electronics is holding the
Pilot Valve open and the
Main Valve closed.
Not an error; indicates call
for heat during normal
operation, Main valve open.
Low thermopile voltage;
main valve not turned ON.
Insufficient water heating;
water temperature not
rising when it should.
Temperature cut-out limit
reached.
Water temperature sensor
failure.
Tank leakage detected by
optional accessory.
Electronics Failure
This is just a warning; The
control does not see power
decaying with the knob in
the OFF position.
Door temperature sensor
failure.
Abnormal combustion
chamber temperature
profile during heating cycle.
Not an error—indicates that
the control is in OFF mode.
6
Recommended Action
You can now turn the knob to a desired setpoint
temperature. LED will continue to flash 1 time
every 3 seconds while in Idle mode (no call for
heat).
None.
Check thermopile and its connections. Check
pilot flame.
Check the valves, check the connectors between
valves and electronics, and check the water
temperature and chamber temperature sensors.
Check inlet gas pressure. If main burner is not lit
and no problems are found in wiring or gas
pressure, replace the control.
Check the valves and the water temperature
sensor. Reduce the water temperature setpoint.
Thoroughly check out main valve operation and
water temperature control before walking away.
Check water temperature sensor and its
connection for open circuits, shorts, or
differences in resistance between the two
sensor elements.
Control recovers after optional accessory has
been reset.
Replace control module.
Check valves.
Check door temperature sensor and its
connection for open circuits or shorts.
Restart the control.
Clean all combustion air intakes to the
appliance. Clean the burner. Remove all
obstacles that may restrict air flow to the burner.
Restart the control.
None; wait until LED turns off if you want to
restart the system.
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