SV9410/SV9420; SV9510/SV9520; SV9610/SV9620 SMARTVALVE™ SYSTEM CONTROLS
69-1058—05
14
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Table 9. Troubleshooting with LED Indicator Assistance.
LED Status
Indicates
Check/Repair
OFF
No power to system control.
1.
Line voltage input power at L1 and L2.
connectors on ST9160 Electronic Fan Timer
(EFT) or 208907 Terminal Board.
2.
Low voltage (24V) power at 24 VAC and COM
terminals on ST9160 or Terminal Board.
3.
Fuse on ST9160 EFT, if provided.
4.
System wiring harness in good condition and
securely connected at both ends.
“Heartbeat”—
Alternating
Bright - Dim
Normal Operation.
This indication shows whenever the system
is powered, unless some abnormal event
has occurred.
—
2 Flashes
Airflow proving switch remains closed
longer than 30 seconds after a call for heat
begins.
Combustion air blower is not energized
until airflow proving switch opens.
1.
Airflow proving switch stuck closed.
2.
Airflow proving switch miswired or jumpered.
3 Flashes
Airflow proving switch remains open longer
than 30 seconds after combustion air
blower energized.
System goes into 5-minute delay period,
with combustion blower off. At the end of
the 5-minute delay, another ignition cycle
will begin.
1.
Ignition system control switch must be in the ON
position.
2.
Airflow proving switch operation, tubing, and
wiring.
3.
Obstructions or restrictions in appliance air
intake or exhaust flue system that prevent
proper combustion air flow.
4 Flashes
Limit string open.
Combustion air blower is energized. If
control system includes ST9160 Electronic
Fan Timer, the heat speed circulating air fan
will be energized until the limit string
resets.
1.
Open manual reset or auto reset burner rollout
switch.
2.
Open high temperature or auxiliary limit switch.
3.
Limit and rollout switch wiring in good condition
and securely connected.
5 Flashes
Flame signal sensed out of proper
sequence.
Combustion air blower is energized. If
control system includes ST9160 Electronic
Fan Timer, the heat speed circulation air fan
will be energized after the selected heat fan
on delay.
Flame at main burner.
6 Flashes
System Lockout.
After one hour lockout reset delay, control
will reset and initiate a new ignition
sequence if the call for heat is still present.
1.
Gas supply off or at too low pressure to operate
appliance.
2.
Damaged or broken HSI element.
3.
Line voltage HOT leadwire not connected to L
terminal on ST9160 or Terminal Board.
4.
Appliance not properly earth grounded.
5.
Flame sense rod contaminated or in incorrect
location.
6.
HSI element located in incorrect position.
7.
Hot surface element or flame sense rod wiring in
good condition and properly c
6+1 Flashes
a,c
Soft Lockout—Maximum retry count
exceeded—4 failed trials for ignition in this
call for heat.
1.
Gas supply off or at too low pressure to operate
appliance.
2.
Damaged or broken HSI element.
3.
Line voltage HOT leadwire not connected to L
terminal on ST9160 or Terminal Board.
4.
Appliance not properly earth grounded.
5.
Flame sense rod contaminated or in incorrect
location.
6.
HSI element located in incorrect position.
7.
Hot surface element or flame sense rod wiring in
good condition and properly connected.