Brochure

26 Customer Service: 252.522.3031
TROUBLESHOOTING
Troubleshooting
MILLIVOLT
Troubleshooting Chart: Millivolt
Problem Possible Causes Action
Damper won’t open. Polarity reversed from
thermopile.
No voltage on Orange
wire.
Signal voltage between
Orange and Black wire less
than 100 mV.
Obstruction in damper.
No power or insufficient
power at damper.
Wiring harness.
Defective damper
controller.
Check to make sure that the positive wire from the thermopile is
connected to the THTP position on the gas valve, and the negative side
of the thermopile is connected to the TP position on the gas valve. If
this is reversed the Flue Sentinel will not operate.
Make sure switch or remote control is in the on position. Check voltage
between the Orange and Black wire after the switch. If voltage is zero
check the switch or remote control for correct installation. If correctly
connected the voltage between the Orange and Black wires should be
the same as the output of the thermopile between THTP and TP on the
gas valve when pilot is lit.
Check connections, adjust pilot, and/or replace thermopile.
Check for protruding screws or binding in pipe/blade assembly and
correct.
Check damper battery & replace if less than 2.8V. Make sure battery is
connected to the circuit board.
Check the voltage at the circuit board to make sure the signal on the
Orange wire is present. This is accomplished by testing the voltage
between the Orange and Black where they are connected to the circuit
board.
If this voltage is not the same as the voltage checked after the switch
between the Orange and Black wire there is a problem with the wiring
harness.
After all the voltages have been checked and controller will still not
operate remove controller and test again. If controller still will not
operate replace controller.
Damper opens and
stops in the open
position but appliance
main burner(s) does
not fire.
Wiring harness.
Circuit board problem.
Battery not connected.
Signal voltage at Yellow
wire less than 100 mV.
Signal voltage at Yellow
wire greater than 100 mV
and less than 1.5 volts.
At the circuit board check the voltage between the Yellow and Black
wire. This voltage should be the same as the voltage between the
Orange and Black wire. If the voltage is the same check the voltage at
the gas valve between the TH and TP. This voltage should be the same
as what was tested at the circuit board. If the voltage is not the same
the problem is in the wiring harness.
If the damper is in the open position and the correct voltage between
the Orange and Black wire were tested, the voltage between the Yellow
and Black wire is still reading zero, cycle the damper again and retest
the voltages. If still no signal replace the controller.
Make sure that the battery inside the enclosure is connected to the
circuit board. If this is not connected the damper will not operate.
Check connections, adjust pilot, and/or replace thermopile.
Check to make sure that the Yellow wire is connected to the TH
connection on the gas valve, and make sure gas supply is turned on.
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