Troubleshooting - Southbend EH-10CCH Installation & Operation Manual

Marathoner Gold Half-Size Electric Convection Ovens

Troubleshooting

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.
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.
When any difficulty arises it is always a good idea to check that the oven has been connected to the type of voltage for
which it was manufactured. The serial plate is located on the inside of the lower front panel. It will list the type of voltage
for which the unit was manufactured. In addition, a wiring diagram is attached to the side of the fold down control panel,
as well as reproduced in this manual (see page 45).
Performance Standard
The typical time for the oven to heat from 75 °F to 350 °F is 7 to 8 minutes. The heating elements should come on when
the actual oven temperature drops to 10 °F below the temperature setting.
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
Oven will not hold correct temperature.
Blower motor will not come on.
INSTALLATION & OPERATION MANUAL 1184093 REV 4 (01/23)
WARNING
NOTICE
Possible Cause
Temperature probe not working.
Temperature control not calling for heat.
Inadequate or improper ventilation.
Out of calibration.
No incoming electric power.
Loose wire connections.
Bad contactor.
Motor bad.
Shut down switch.
Troubleshooting
Check or Replace
Resistance across temperature probe leads
at room temperature (70 °F) should be
approximately 1096 ohms.
When heat is required, there should be
continuity between terminals 6 and 7 on
temperature control.
Check ventilation hood. Verify draw and make
up air adjustment.
Calibrate according to procedure described on
page 40.
Check incoming power.
Check wire connections.
Contactor pull in and supply power to motor.
Verify contactor pulling in.
If power is being supplied but motor will not turn,
replace motor.
All power except for motor supply come through
shut down switch. Check for continuity.
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