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S E R V I C E
T R O U B L E S H OO T I NG
Error
Code Description/Results
Possible Cause
Service Required
E-10 Air sensor fault (shorted)
Air sensor is shorted or defective, or there is a connection failure.
See following page for air sensor test.
E-11 Air sensor fault (open)
Air sensor is open or defective, or there is a connection failure.
See following page for air sensor test.
E-20 Product probe fault (shorted)
Oven will cook in time only
Product probe is shorted or defective, or there is a connection failure.
See following page for probe sensor test.
E-21 Product probe fault (open)
Oven will cook in time only
Product Probe is open, defective, or there is a connection failure.
See following page for probe sensor test.
E-30 Under temperature
The unit has been below its set temperature for 90 minutes.
Check the following: Oven door may be open or door gasket may need
replacement. Verify that the oven has been preheated, does not contain
frozen products, and is not overloaded. Air sensor, probe, or relay may be
defective, there may be a bad wire connection, an open heating cable, or the
high limit switch may be tripped. Contact service if problem persists.
E-31 Over temperature
This error will display if the unit reaches a temperature of 25 degrees above
its maximum allowable set point. If the unit reaches 50 degrees above its
maximum allowable set point the control will turn off. Check the following:
Shorted cable, defective solid state relay, or defective air sensor. If none of
the above, contact service.
E-50 Temperature sensor chip 1
is not responding.
Contact service.
E-51 Temperature sensor chip 2
is not responding.
Contact service.
E-60 Real time clock error
This is likely caused by the unit having been unplugged for an extended
amount of time. The data stored in the Real-Time Clock has been reset to
the factory default values. Beeper volume will default to on, and the
temperature scale will default to °F. Turn main breaker to the unit off for
10 seconds and then restore power. Contact service if problem persists.
E-61 Real time clock chip is
not responding.
Contact service.
E-70 Configuration connector error
Check control connections for loose wires. If none, control must be replaced.
E-78 Voltage low
Voltage below 90 VAC on a 125 VAC unit, or below 190 VAC on a
208-240 VAC unit. Correct voltage.
E-79 Voltage high
Voltage over 130 VAC on a 125 VAC unit, or over 250 VAC on a
208-240 VAC unit. Correct voltage.
E-80 Function data values were reset.
Ensure that all temperatures and times are properly set.
Contact service if problem persists.
E-81 Internal control calibration error
Contact service.
E-82 Internal control calibration error
Contact service.
E-83 EEPROM is not responding
Contact service.
E-84 EEPROM - Unit ID error
Contact service.
E-86 EEPROM - HACCP address error
If using HACCP, the unit’s address has been reset to 1. Ensure that your
oven is set to the correct address (1-247). Contact service if problem persists.
E-87 Calibration offset error
Sensor calibration values corrupted. All offsets reset to 0. Re-calibrate oven
cavities. Contact service if problem persists.
E-90 Button stuck
A button has been pressed for >= 60 seconds. This error will auto-reset
when there is no button stuck, remove control and check all button
functions, align control properly.
E-dS Datakey signature bad
Datakey incompatible with control. Incorrect or corrupt data key installed
on control. Replace Datakey with correct key for control and test.
E-dU Datakey unplugged
The data key is not being seen by the control. Install data key and test
operation. Contact service if problem persists
PG. 22 767-SK/III, 1767-SK/III, 2800-SK/III INSTALLATION/OPERATION/SERVICE MANUAL