Installation / Operation Instruction Manual
Table Of Contents
- GAS-FIRED WATER HEATER
- TABLE OF CONTENTS
- Figure 1
- GENERAL OPERATION
- Probable Cause
- Control Status
- LED Status
- Millivolt power is not present. Light pilot.
- None (LED not on or flashing)
- Gas valve is powered and waiting for the set point knob to be turned to a water temperature setting. If the set point knob is at desired setting the thermostat is satisfied.
- If set point knob is in “PILOT” position, then pilot flame is detected. (no faults).
- One flash and three second pause
- LED strobe (two quick flashes) and three second pause
- Water heater operating normally.
- Thermostat calling for heat (no faults).
- Set point knob was recently turn to “OFF” position. Wait until LED goes out before attempting to relight.
- Set point knob has been recently turned to the “OFF” position.
- LED on continuously
- Weak pilot flame detected. System will reset when pilot flame is sufficient.
- Two flashes and three second pause
- Insufficient water heating. System will reset.
- Three flashes and three second pause
- Excessive tank temperature. System must be reset.
- Four flashes and three second pause
- Figure 11
26
Troubleshooting Chart – Honeywell V2
LED Status
Control Status
Probable Cause
None (LED not on
or flashing)
Not an error.
Indicates control is in
OFF mode. Pilot is
off.
Gas valve is functioning normally.
Gas valve is not powered. Light pilot.
One flash every
four seconds
(LED green)
Not an error.
Indicates pilot is lit
and main burner is
off.
The knob can be turned to a desired
setpoint temperature.
One flash every
second
(LED green)
Not an error.
Indicates main valve
is open and main
burner is lit.
None. Control will automatically shut
main burner off when water
temperature reaches the setpoint
temperature.
Two flashes and
three second
pause (LED
yellow)
Low thermopile
voltage; main valve
not turned ON.
Check thermopile and its
connections. Check pilot flame.
Four flashes and
three second
pause (LED red)
Temperature cut-out
limit reached,
causing shutdown.
Check the valves and the water
temperature sensor. Reduce the
water temperature setpoint. Verify
control operation, replace if
exceeding setpoint.
Five flashes and
three second
pause (LED red)
Electronics, sensor,
or gas valve fault
detected.
Check water temperature sensor and
its connection for open circuits,
shorts, or differences in resistance
between the two sensor elements.
Solid ON
(LED red)
Not an error.
Indicates that the
control is in shutdown
mode. Pilot is off.
None; wait until LED turns off if you
want to restart system.