Honeywell WV8840B User Manual

WV8840B WATER HEATER CONTROLS
69-2450—03 6
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.
*
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.
Table 3. Troubleshooting with status light visual indication.
LED Error
Code
**
Number of LED Flashes
*
Detected Failure Recommended Action
Normal
operation.
knob in
PILOT
position.
1 flash
every 3
seconds
Not an error; indicates
the electronics is
holding the Pilot Valve
open and the Main
Valve closed.
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).
Normal
operation.
knob in
HEAT
position.
1 flash
every 3
seconds
Not an error; indicates
call for heat during
normal operation,
Main valve open.
None.
Action
required.
2 flashes Low thermopile
voltage; main valve not
turned ON.
Check thermopile and its
connections. Check pilot flame.
4 flashes Temperature cut-out
limit reached.
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.
5 flashes Water temperature
sensor failure.
Check water temperature sensor and
its connection for open circuits,
shorts, or differences in resistance
between the two sensor elements.
6 flashes Tank leakage detected
by accessory module.
Control recovers after receiving
message from accessory module.
7 flashes Electronics Failure Replace control module.
8 Flashes This is just a warning;
The control does not
see power decaying
with the knob in the
OFF position.
Check valves.
Solid ON Not an error—
indicates that the
control is in OFF
mode.
None; wait until LED turns off if you
want to restart the system.

Honeywell WV8840B Specifications

General

Brand	Honeywell
Model	WV8840B
Category	Control Unit
Language	English