Section 4... the “PilOT VAlVE” lED
“System Sentinel” Troubleshooting guide
is the Spark ignitor operating?
(Can sparking be heard?)
is the “igNiTiON” lED illuminated?
ignition Control module
is inoperable and must be
replaced.
is the Pilot Flame burning?
gas Control Valve
is inoperable and must
be replaced
i s
the inlet gas pres-
sure at or below the
maximum as speci-
fied on the rating
plate?
Check continuity of Brown wire
between ECO Device (inside of Ther-
mostat), and “PV” Terminal on gas
Control Valve. Repair or replace wire as
needed to restore power to “PV” Termi-
nal on gas valve.
Refer to Section 3...the “igNi-
TiON” lED in the Troubleshooting guide
The ignition Control module is in
the ignition sequence, and is pro-
viding 24 VAC power to the ECO
(Energy Cut-Off Device) inside of
the Thermostat
YES
YES
YES
YES
NO
NO
NO
NO
NO
Refer to Section 5...the “ECO” lED in
the Troubleshooting guide
NO
NO
is the “PilOT VAlVE” lED illuminated?
1. Remove ignition Cable and check for good conti-
nuity, replace if necessary.
2. Check ignitor Electrode gap for proper spacing
(1/8” to 5/32”). Correct if necessary.
3. Examine Ceramic insulator on Pilot Assembly
for cracks. Replace if cracks are evident.
is 24 VAC present between the Brown wire on “PV”
Terminal and gray ground wire on ignition Control
module?
is 24 VAC present between the Brown wire on “PV”
Terminal and White wire on “PV/mV” Terminal on
the gas Control Valve?
YES
YES
YES
YES
is the “ECO” lED
illuminated?
CAUTION
!
label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. VERiFY PROP-
ER OPERATiON AFTER SERViCiNg!
The System Sentinel Panel is
defective and must be replaced.
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