Fault-Finding Procedures
Section 5 Maintenance
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8.
Check that the relevant LED lights up.
Fault-Finding Procedures
PM8xx Processor Unit
Table 21. PM8xx – Fault-Finding Procedure
Fault
Possible Cause and Corrective Action
F(ault) LED is ON
Controller Re-start, (INIT), in progress.
•
Wait for Controller restart to finalize.
If condition persists:
•
Check the CEX-bus fuse.
•
Check for a unit failure on the CEX-bus.
See Fault-Finding,
on page 135 and
R(un) LED is OFF
No application loaded on the Controller.
•
Load application.
•
Restart Controller (INIT push button).
Controller application failed.
•
Reload application.
•
Restart Controller (INIT push button).
B(attery) LED is flashing
Battery power (Internal or External) is below an
acceptable level or non-existent.
•
Install new battery.
External battery cable disconnected.
•
Connect external battery cable.
Summary of Contents for AC 800M
Page 1: ...ControlIT AC 800M Version 2 1 Controller Hardware Hardware and Operation...
Page 2: ......
Page 3: ...Controller Hardware Hardware and Operation ControlIT AC 800M Version 2 1...
Page 10: ...7DEOH RI RQWHQWV 10 3BSE 027 941 R301...
Page 20: ...Related Documentation About This Book 20 3BSE 027 941 R301...
Page 26: ...Operating Environment Safety Summary 26 3BSE 027 941 R301...
Page 42: ...Product Release History Section 1 Introduction 42 3BSE 027 941 R301...
Page 108: ...Powering from an External 24 V DC Source Section 3 Configuration 108 3BSE 027 941 R301...
Page 118: ...Verification of Redundant CPU Section 4 Operation 118 3BSE 027 941 R301...
Page 212: ...Low Voltage Directive LVD Appendix D Directive Considerations 212 3BSE 027 941 R301...
Page 214: ...Hazardous Location Approval Appendix E Standards 214 3BSE 027 941 R301...
Page 228: ...QGH 228 3BSE 027 941 R301...
Page 229: ......