Installation / Operation Instruction Manual

26
Troubleshooting Chart – Honeywell V2
LED Status
Control Status
Probable Cause
None (LED not on or
flashing)
Millivolt power is not
present. Light pilot.
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.
You can now turn the knob 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 OFF
mode.
None; wait until LED turns off if
you want to restart system.