Owner manual

Watlow Controls 5 EHG CL User’s Guide
EHG CL Error Codes (cont.)
Display Description Possible Cause Corrective Action
[Ahi]
Alarm High Process temp exceeds set point by
value greater than alarm high setting
• Set HTA value to correct high
temperature alert value
[Alo]
Alarm Low Process temp below set point by value
greater than alarm low setting
• Set LTA value to correct Low
temperature alert value
[E91]
Communications Queue
Full
Communications buffer overfl ow • Contact Technical Support at
1-507-494-5656
[E10]
EEPROM Error EEPROM memory space fails CRC
check (checksum for parameter space)
• Contact Technical Support at
1-507-494-5656
[E11]
CRC Error Flash memory space fails CRC check
(checksum for program space)
• Contact Technical Support at
1-507-494-5656
[E12]
CPU Clock Error Clock frequency is < 5 MHz or > 13.1
MHz
• Contact Technical Support at
1-507-494-5656
[E13]
Stack Overfl ow Stack has overfl owed • Contact Technical Support at
1-507-494-5656
[E15]
AI Function Error Analog reference is < 1.82 or > 2.06
volts
• Contact Technical Support at
1-507-494-5656
[E16]
Process Comparison
Error
Limit and control sensor readings
differ by value greater than process
comparison value
• Check setting of Proces Com-
parison Value
• Set Process Comparison Value
to correct value
• Check wiring of sensors
[E17]
Data Store Error Data store functions are not set up • Check setting of Process Com-
parison Value
• Check wiring of sensors
[E20]
Base control fi rmware
ID not supported
Base control fi rmware is not compat-
ible with Display Module fi rmware
• Check fi rmware compatibility
between Base Control and
Display Module. Revision 20.0
and greater for Base Control
and Display Module are com-
patible for EHG2-AAAA-0000.