Alto-Shaam AS-250 User Manual
Page 15
#812 •
INSTALLATION
/
OPERATION
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SERVICE MANUAL
• 13
S E R V I C E
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 off 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 off.
T R O U B L E S H O O T I N G
Error
Possible Cause
Code
Description/Results
Service Required
E-10
Air Sensor Fault (shorted)
Inoperative Oven
Air sensor defective? See following page for air sensor test.
E-11
Air Sensor Fault (open)
Inoperative Oven
E-20
Product Probe Fault (shorted)
Oven will cook in time only
Probe defective? See following page for probe sensor test.
E-21
Product Probe Fault (open)
Oven will cook in time only
E-30
Under temperature
Oven door closed? Door gasket need replacement? Preheat skipped?
Oven will shut down
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?
Oven will shut down
If none of the above, call service.
E-70
Configuration connector error
Check control connections for loose wires. If none, control
I
noperative Oven
must be replaced.
E-78
Voltage low
If 125 VAC unit, incoming voltage is below 90 VAC. Correct.
I
noperative Oven
If 208-240 VAC unit, incoming voltage is below 190 VAC. Correct.
E-79
Voltage high
If 125 VAC unit, incoming voltage is over 130 VAC. Correct.
I
noperative Oven
If 208-240 VAC unit, incoming voltage is over 250 VAC. Correct.
E-80
EEPROM - Function data error
Replace control.
I
noperative Oven
E-82
EEPROM - Calibration data error
Replace control.
I
noperative Oven
E-84
EEPROM - Unit ID error
Replace control.
I
noperative Oven
E-86
EEPROM - Preset data error
Replace control.
I
noperative Oven