Southbend TVGS-32SC - Manuel (Page 31)

T RU V ECTION G AS C ONVECTION O VENS
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ROUBLESHOOTING
O WNER ’ S M ANUAL 1194658 P AGE 31
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ROUBLESHOOTING
! WARNING
ADJUSTMENTS AND SERVICE WORK MAY BE PERFORMED ONLY BY A QUALIFIED
TECHNICIAN WHO IS EXPERIENCED IN, AND KNOWLEDGEABLE WITH, THE OPERATION OF
COMMERCIAL COOKING EQUIPMENT. HOWEVER, TO ASSURE YOUR CONFIDENCE,
CONTACT YOUR AUTHORIZED SERVICE AGENCY FOR RELIABLE SERVICE, DEPENDABLE
ADVICE OR OTHER ASSISTANCE, AND FOR GENUINE FACTORY PARTS.
NOTICE
Warranty will be void and the manufacturer is relieved of all liability if service work is performed by
other than a qualified technician, or if other than genuine Southbend replacement parts are installed.
In case of problems in operation at initial installation, check type of gas and manifold pressure and
compare with information listed on the serial plate. The serial plate is located inside the lower front panel.
TROUBLESHOOTING GUIDE
The left column of the following table lists symptoms that indicate a problem, while the center and right
columns list the possible causes and appropriate corrective action. Note that the recommendations of this
table assume that the wiring connections are good. When checking a component, always check the wiring
attached to the component as well.
Symptom Possible Cause Check or Replace
Temperature probe not working. Resistance across temperature probe leads at room temperature (70°F)
should be approximately 1096 ohms.
Temperature control not calling for heat. When heat is required, there should be continuity between terminals 6
and 7 on temperature control.
Undersized gas supply line Oven requires 1" ID gas line.
Low gas pressure. Oven requires 6" manifold water column pressure for natural gas, 10" for
propane.
Inadequate or improper ventilation. Check ventilation hood. Verify draw and make up air adjustment.
Oven will not hold
correct temperature.
Out of calibration. Calibrate according to procedure described on page 30.
No power to gas valve. Check for 120V from ignition box to gas valve.
Faulty main gas solenoid. Replace gas valve.
Faulty ignition module. Replace ignition module.
Manual shutoff valve closed. Open all shut-off valve.
Ignitor glows red but
burners do not come on
when thermostat calls
for heat (cooking light is
on).
Ignitor not in front of rear end of burner. Re-position ignitor to be in front of rear end of burner.
Table continues on next page.