SV9401/SV9402/SV9403, SV9501/SV9502/SV9503, SV9601/SV9602 SMARTVALVE™
69-1004—01
12
SERVICE
CAUTION
Equipment Damage. Can cause property damage.
Do not disassemble the ignition system control; it
contains no replaceable components. Attempted
disassembly or repair can damage the ignition
system control.
CAUTION
Electrical Equipment Damage Hazard.
Do not apply a jumper across or short the
thermostat, 24V hot or 24V common terminal in
the SV9401/SV9402/SV9403, SV9501/SV9502/
SV9503, or SV9601/SV9602 wiring harness. This
can burn out the heat anticipator in the
thermostat or damage the system transformer.
Carefully read the Sequence of Operation and
Troubleshooting information before attempting to
service the appliance. After servicing, make sure the
system operates properly.
IMPORTANT
Allow 60 seconds after shutdown before reener-
gizing a step-opening model to assure lightoff
at step pressure.
SEQUENCE OF OPERATION
Fig. 13 shows the sequence of operation for this family of
gas controls. When reviewing sequence of operation:
• Make sure the appliance is powered with the gas
supply turned on.
• Make sure the ignition system control switch is in the
ON position.
TROUBLESHOOTING
If Main Burner Will Not Come On With Call for Heat:
1.
Make sure the appliance has power and the gas
supply is turned on.
2.
Make sure the ignition system control switch is in
the ON position.
3.
Adjust the thermostat several degrees above room
temperature.
4.
If the appliance does not light, check for proper
ignition control system operation. Use Fig. 13.
5.
If it appears the ignition control system is not
working properly, use Fig. 14 as a troubleshooting
guide.
IMPORTANT
1. Proper troubleshooting requires measurement
of voltage and resistance with a volt/ohm meter.
2. Use proper size probes and appropriate testing
techniques to get good test information without
damaging the control terminals, connectors, or
wiring harness.
Use the following basic troubleshooting procedure:
1.
Review this information carefully before going to
the job site.
2.
Identify the specific ignition control model on the
appliance.
3.
Make sure the Q3450/Q3480 HSI element is good.
4.
Make sure the ignition control switch (knob if
SV9500) is in the ON position unless directed oth-
erwise in the Troubleshooting flow chart.
