SV9410/SV9420; SV9510/SV9520; SV9610/SV9620 SMARTVALVE™ SYSTEM CONTROLS
11
69-1058—05
MAINTENANCE
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
Do not attempt to take the control apart or clean
it. Improper cleaning or reassembly can cause
gas leakage.
Regular preventive maintenance is important in
applications such as in the commercial cooking and
agricultural and industrial industries that place a heavy
load on system controls because:
• In many such applications, particularly commercial
cooking, the equipment operates 100,000 to 200,000
cycles per year. Such heavy cycling can wear out the
gas control in one to two years.
• Exposure to water, dirt, chemicals and heat can
damage the gas control and shut down the control
system.
The maintenance program should include regular
checkout of the control as outlined in the Startup and
Checkout section, and the control system as described in
the appliance manufacturer literature.
Maintenance frequency must be determined individually
for each application. Some considerations are:
• Cycling frequency. Appliances that may cycle 200,000
times annually should be checked monthly.
• Intermittent use. Appliances that are used seasonally
should be checked before shutdown and again before
the next use.
• Consequence of unexpected shutdown. Where the
cost of an unexpected shutdown would be high, the
system should be checked more often.
• Dusty, wet, or corrosive environment. Since these
environments can cause the gas control to deteriorate
more rapidly, the system should be checked more
often.
The system should be replaced if:
• It does not perform properly on checkout or
troubleshooting.
• The gas control is likely to have operated for more
than 200,000 cycles.
• The control is wet or looks as if it has been wet.
SERVICE
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or 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
Equipment Damage Hazard.
Improper wiring can damage the equipment.
1. Do not apply a jumper across or short the
thermostat, 24V hot or 24V common terminal
in the SV9410/SV9420; SV9510/SV9520;
SV9610/SV9620 wiring harness. Doing so can
burn out the heat anticipator in the thermostat
or damage the system transformer.
2. After servicing, verify proper system operation.
IMPORTANT
Allow 60 seconds after shutdown before
re-energizing step-opening model to assure
lightoff at step pressure.
Sequence of Operation
1.
Make sure the ignition system control switch is in
the ON position.
2.
Follow the sequence of operation as shown in Fig.
11.
TROUBLESHOOTING
Troubleshooting with LED Indicator
Assistance (No cycling of appliance
power or thermostat call for heat
since appliance failure has
occurred)
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Only a trained, experienced service technician
should perform this troubleshooting.
1.
Check the system thermostat to make sure it is in
an active call for heat mode. (Do not cycle the
thermostat on and off at this time.)
2.
Remove the appliance burner compartment door.
Do not interrupt the power to the SV9410/SV9420;
SV9510/SV9520; SV9610/SV9620 by opening any
electrically interlocked panels.
3.
Observe LED indicator on SV9410/SV9420;
SV9510/SV9520; SV9610/SV9620; check and
repair the system as noted in Table 9.
4.
After LED flash code analysis and appliance repair
are complete, turn thermostat below room
temperature for 10 seconds; turn the thermostat
above room temperature to initiate a new call for
heat.
5.
Observe the ignition sequence; comparing it to the
Sequence of Operation shown in Fig. 11. Allow the
new ignition sequence to proceed until appliance
lights or an abnormal or unexpected event is
observed. See next section.