Owner manual

Watlow EZ-ZONE
®
PM Integrated Controller • 154 • Chapter11Appendix
Troubleshooting Alarms, Errors and Control Issues
Indication Description Possible Cause(s) Corrective Action
Alarm won’t clear or
reset
Alarm will not clear or reset
with keypad or digital input
•Alarmlatchingisactive
•Alarmsettoincorrectoutput
•Alarmissettoincorrectsource
•Sensorinputisoutofalarmsetpoint
range
•Alarmsetpointisincorrect
•Alarmissettoincorrecttype
•Digitalinputfunctionisincorrect
•Resetalarmwhenprocessiswithin
range or disable latching
•Setoutputtocorrectalarmsource
instance
•Setalarmsourcetocorrectinputin-
stance
•Correctcauseofsensorinputoutof
alarm range
•Setalarmsetpointtocorrecttrip
point
•Setalarmtocorrecttype:process,de-
viation or power
•Setdigitalinputfunctionandsource
instance
Alarm won’t occur Alarm will not activate output •Alarmsilencingisactive
•Alarmblockingisactive
•Alarmissettoincorrectoutput
•Alarmissettoincorrectsource
•Alarmsetpointisincorrect
•Alarmissettoincorrecttype
•Disablealarmsilencing,ifrequired
•Disablealarmblocking,ifrequired
•Setoutputtocorrectalarmsource
instance
•Setalarmsourcetocorrectinputin-
stance
•Setalarmsetpointtocorrecttrip
point
•Setalarmtocorrecttype:process,de-
viation or power
[AL;E1] Alarm Error
[AL;E2]
[AL;E3]
[AL;E4]
Alarm state cannot be deter-
mined due to lack of sensor
input
•Sensorimproperlywiredoropen
•Incorrectsettingofsensortype
•Calibrationcorrupt
•Correctwiringorreplacesensor
•Matchsettingtosensorused
•Checkcalibrationofcontroller
[AL;L1] Alarm Low
[AL;L2]
[AL;L3]
[AL;L4]
Sensor input below low alarm
set point
•Temperatureislessthanalarmset
point
•Alarmissettolatchingandanalarm
occurred in the past
•Incorrectalarmsetpoint
•Incorrectalarmsource
•Checkcauseofundertemperature
•Clearlatchedalarm
•Establishcorrectalarmsetpoint
•Setalarmsourcetopropersetting
[AL;h1} Alarm High
[AL;h2]
[AL;h3]
[AL;h4]
Sensor input above high
alarm set point
•Temperatureisgreaterthanalarm
set point
•Alarmissettolatchingandanalarm
occurred in the past
•Incorrectalarmsetpoint
•Incorrectalarmsource
•Checkcauseofovertemperature
•Clearlatchedalarm
•Establishcorrectalarmsetpoint
•Setalarmsourcetopropersetting
[Er;i1] Error Input
[Er;i2]
Sensor does not provide a
valid signal to controller
•Sensorimproperlywiredoropen
•Incorrectsettingofsensortype
•Calibrationcorrupt
•Correctwiringorreplacesensor
•Matchsettingtosensorused
•Checkcalibrationofcontroller
Limit won’t clear or
reset
Limit will not clear or reset
with keypad or digital input
•Sensorinputisoutoflimitsetpoint
range
•Limitsetpointisincorrect
•Digitalinputfunctionisincorrect
•Correctcauseofsensorinputoutof
limit range
•Setlimitsetpointtocorrecttrippoint
•Setdigitalinputfunctionandsource
instance
[Li;E1] Limit Error
Limit state cannot be deter-
mined due to lack of sensor
input, limit will trip
•Sensorimproperlywiredoropen
•Incorrectsettingofsensortype
•Calibrationcorrupt
•Correctwiringorreplacesensor
•Matchsettingtosensorused
•Checkcalibrationofcontroller
[Li;L1] Limit Low
Sensor input below low limit
set point
•Temperatureislessthanlimitset
point
•Limitoutputslatchandrequirereset
•Incorrectalarmsetpoint
•Checkcauseofundertemperature
•Clearlimit
•Establishcorrectlimitsetpoint
[Li;h1] Limit High
Sensor input above high limit
set point
•Temperatureisgreaterthanlimitset
point
•Limitoutputslatchandrequirereset
•Incorrectalarmsetpoint
•Checkcauseofovertemperature
•Clearlimit
•Establishcorrectlimitsetpoint
Chapter 11: Appendix