Diagnostics and Troubleshooting Fault Detection and Troubleclearing

Controller

Diagnostic Summary

(In the User Utility and Operator

Interface)

Menu

Status

Item

 

 

 

Controller

Fault Detection / Troubleclearing

LED on CPU

 

 

 

 

 

 

 

 

Possible Cause

Controller Action

User Action

 

 

 

 

RTC

BATTERY

 

FAILURE

 

 

RTC

PROGRAMMING

 

FAILURE

 

 

RTC

READ FAILURE

 

 

I/O

GOOD

 

 

I/O

MODULE

 

ERROR

 

 

I/O

BAD BACKPAN

 

 

I/O

BAD BACKPAN

 

ID

 

 

POWER LED flashes 8 times

POWER LED flashes 7 times

POWER LED flashes 7 times

N/A

POWER LED flashes 9 times.

POWER LED flashes 9 times.

RTC battery failed on power-up

RTC failed to program

Unable to read

RTC

One of the I/O board diagnostics failed.

Bad backplane

EEPROM

Incompatible backplane board

Time and date is set to 00:00:00, January 1, 1970.

Time and date is set to 00:00:00, January 1, 1970.

Time and date is set to 00:00:00, January 1, 1970.

N/A

Analog inputs use default coefficients.

Analog inputs use default coefficients.

1.If Lo BAT LED is off, cycle power.

2.If Lo BAT LED is on, replace battery and cycle power.

1.Program RTC.

2.Cycle power.

3.Replace CPU.

4.Replace boards in backplane.

5.Replace backplane.

1.Program RTC.

2.Cycle power.

3.Replace CPU.

4.Replace boards in backplane.

5.Replace backplane.

none

Access the I/O

MODULE DIAGNOSTICS display.

1.Cycle power.

2.Replace backplane board.

1.Cycle power.

2.Replace backplane board.

Release F

UMC800 Controller Installation and User Guide

85

4/01

 

 

Page 93
Image 93
Honeywell UMC800 manual RTC Read Failure