Service manual

O&C MANUAL #8311 • TH/III FAMILY

PG. 20

SECTION 5 SERVICE SECTION 5

This section is provided for the assistance of qualified technicians only and

is not intended for use by untrained or unauthorized service personnel.

Do not replace any electrical components without first

disconnecting electrical power to the unit by switching

FF the electrical power at the rear of the oven.

A warning sign should be posted on the panel indicating the oven is

being serviced and that the power must remain O

FF.

TROUBLE SHOOTING

Error Possible Cause

Code Description/Results Service Required

E-10 Air Sensor Fault (shorted)

Air sensor defective? See following page for air sensor test.

E-11 Air Sensor Fault (open)

E-20 Product Probe Fault (shorted)

Probe defective? See following page for probe sensor test.

E-21 Product Probe Fault (open)

E-30 Under temperature Oven door closed? Door gasket need replacement? Preheat skipped? Oven

overloaded or has frozen product? Defective air sensor or probe? Defective

solid state relay? Bad wire connections or open heating cable? Is the high

limit switch tripped? If none of the above, call service.

E-31 Over temperature Shorted cable? Defective solid state relay? Defective air sensor? If none of

the above, call service.

E-60 Real time clock error Control must be replaced.

E-70 Configuration connector error Check control connections for loose wires. If none, control must be replaced.

E-78 Voltage low If 125 VAC unit, voltage is below 90 VAC. Correct.

If 208-240 VAC voltage is below 190 VAC. Correct.

E-79 Voltage high If 125 VAC unit, voltage is over 130 VAC. Correct.

If 208-240 VAC, voltage is over 250 VAC. Correct.

E-80 EEPROM - Function data error Replace control.

E-82 EEPROM - Calibration data error Replace control.

E-84 EEPROM - Unit ID error Replace control.

E-86 EEPROM - Preset data error Replace control.

Inoperative Oven

Oven will cook in time only

Oven will shut down

Inoperative Oven