Southbend STRG-5D - Manual (Page 31)

S TRATO S TEAM C OUNTERTOP S TEAMER S ERVICE
Symptom Possible Cause Cure
Slow start up or poor cooking
performance Low gas pressure Oven requires 4” WC gas pressure minimum measured at the
manifold pressure tap for natural gas, and 11” WC for L.P.
No power to gas valve Check for 24V from ignition box to gas valve.
Faulty main gas solenoid Replace gas valve.
Faulty ignition module Replace ignition module.
Manual shutoff valve
closed Open manual valve.
Hot surface ignitor glows red but
burners do not come on when
thermostat calls for heat.
Hot surface ignitor not
positioned over burner
correctly Reposition and retighten ignitor.
No power to ignitor Check that voltage from ignitor module to ignitor is 24V. Ignitor,
when operating, should draw between 1 and 3 amps.
Ignitor broken or cracked Should read continuity leads. Replace ignitor if necessary.
No power to ignition
module There should be 24V AC from the transformer to the ignition
module.
No power to transformer Check for unit voltage on the serial plate.
Hot surface ignitor does not glow
red.
Faulty power switch Check for continuity through power switch when in on position.
Readjust or replace as necessary.
Burner and orifice out of
alignment Orifice must inject gas down exact center of burner.
Gas pressure is too low Oven requires 4” WC gas pressure minimum measured at the
manifold pressure tap for natural gas, and 11” WC for L.P.
Not all burners ignite
Burner orifice is clogged Make sure burner orifices are clear and properly sized. Natural
gas #54, Propane #64.
Bad flame sensor or
improperly positioned Check in series in micro amps. Minimum is 0.75 micro amps,
no maximum. Burners light but go out within a
few seconds. Ignitor will glow
approximately 5 seconds. If
burner does not ignite, ignition
module will try three times and
then lock out.
Bad gas valve Check power to gas valve. It should be 24V AC.
O WNER ’ S M ANUAL 1185290 P AGE 31 OF 50