Watlow EZ-ZONE RM Limit Module Rev C Manuel d'utilisateur télécharger pdf (Page 118)

Watlow EZ-ZONE

®

RML Module • 115 • Appendix

Troubleshooting Alarms, Errors and Module 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

Alarm Error

[AL;E1] [AL;E2]

[AL;E3] [AL;E4]

[AL;E5] [AL;E6]

[AL;E7] [AL;E8]

[AL;E9] [AL;10]

[AL;11] [AL;12]

[AL;13] [AL;14]

[AL;15] [AL;16]

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

Alarm Low

[AL;L1] [AL;L2]

[AL;L3] [AL;L4]

[AL;L5] [AL;L6]

[AL;L7] [AL;L8]

[AL;L9] [AL;10]

[AL;11] [AL;12]

[AL;13] [AL;14]

[AL;15] [AL;16]

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

Alarm High

[AL;h1} [AL;h2]

[AL;h3] [AL;h4]

[AL;h5} [AL;h6]

[AL;h7] [AL;h8]

[AL;h9] [AL;10]

[AL;11] [AL;12]

[AL;13] [AL;14]

[AL;15] [AL;16]

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

No Display No display indication or LED

illumination

• Power to controller is off

• Fuse open

• Breaker tripped

• Safety interlock switch open

• Separate system limit control acti-

vated

• Wiring error

• Incorrect voltage to controller

• Turn on power

• Replace fuse

• Reset breaker

• Close interlock switch

• Reset limit

• Correct wiring issue

• Apply correct voltage, check part

number

1 2 ... 113 114 115 116 117 118 119 120 121 122 123 ... 126 127

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