Watlow Series EHG CL - Manual (Page 5)

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
.