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TROUBLE SHOOTING OF ELECTRICAL EQUIPMENT SHOULD BE PERFORMED
BY QUALIFIED PERSONNEL ONLY. ELECTRICAL POTENTIAL IS GREAT
Error Code Display
The error code is visible in the display. The list below outlines the standard error codes
associated with this unit. They are designed to isolate specific problem areas and aid in
troubleshooting your control.
Problem
Er01-
(ROM) Checksum error
Er02-
(RAM) Checksum error
Er05-
Eprom Error
Er06-
Zone 1/Top probe A/D
underflow error
Er07-
Zone 1/Top probe
overflow error
Er08-
Zone 2/Bottom probe A/D
underflow error
Er09-
Zone 2/Bottom probe
overflow error
Er10-
Stack overflow error
Er11-
Zone 1/Top probe error
Er12-
Zone 1/Top probe shorted
0690S20046
690-NC2
TROUBLESHOOTING
WARNING
ENOUGH TO CAUSE INJURY OR DEATH.
Probable Cause
Internal ROM is defective
Internal RAM is defective
Power loss while storing
data.
Eprom has been
changed.
Incorrect sensor type.
Measuring temperature
outside the sensor range.
Open sensor
Incorrect sensor type.
Measuring temperature
outside the sensor range.
Open sensor
Microprocessor error
Open RTD probe
Probe is out of range
Solution
Turn Off and then Restart.
Turn Off and then Restart.
Turn Off and then Restart.
or Replace Eprom
Check sensor.
Check for an open sensor.
Check sensor.
Check for an open sensor.
Turn Off and then Restart.
Check for an open probe
Check probe for short.
Should be greater than
90 ohms.
6-1
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