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5
TROUBLESHOOTING
Troubleshooting with Status Indicator Assistance
1. Pilot burner must be lit. If not, push and hold Pilot knob and light pilot with
piezo. Error code will be displayed when thermopile heats up. Error code
can be recognized by counting the number of 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 below. 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.)
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 at which
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.
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 are
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.
*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.
