Honeywell WV8840B Installation Instructions Manual page 6

WV8840B WATER HEATER CONTROLS
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
LED Error
**
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.
4 flashes
5 flashes
6 flashes
7 flashes
8 Flashes
Solid ON
*
LED Error Codes are flashed once per second, with a three-second pause between repeating the error code.
**
Maximum two different errors can be displayed simultaneously if more than one error has been detected.
69-2450—03
Table 3. Troubleshooting with status light visual indication.
Number of LED Flashes
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.
*
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.
Temperature cut-out
limit reached.
Water temperature
sensor failure.
Tank leakage detected
by accessory module.
Electronics Failure
This is just a warning;
The control does not
see power decaying
with the knob in the
OFF position.
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 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 receiving
message from accessory module.
Replace control module.
Check valves.
None; wait until LED turns off if you
want to restart the system.