Effective 11/2003
Page 44
I.L. 66A7535H02
Symptom
Probable Cause
Possible Solution(s)
Comments
EEROM
ALARM
Non fatal memory error
Note settings via View Settings screen. Then
enter Program Settings and SAVE CURRENT
curve. If setpoint download is successful press
Reset. Verify your desired settings.
If alarm reappears after trying the
possible solution, replace trip unit
at first opportunity.
SETTINGS
ERROR
ALARM
Set point mismatch between
CHip A and CHip B
Microcomputers
Note settings via View Settings screen. Using
the Escape pushbutton, enter Program Settings
and SAVE CURRENT curve. (Do not use
Reset pushbutton at this time.) If setpoint
download is successful, press RESET. Verify
your desired settings.
If alarm reappears after trying the
possible solution, replace trip unit
at first opportunity.
Ref. Fig. 3.1
WATCHDOG
ALARM
Low line Voltage
Communication Problem
Between CHip A and CHip B
Microcomputers
Check input voltage for Aux Power A14, A15
1. Push Reset Button
2. Replace unit if WATCHDOG alarm
reappears or if status LED is not flashing.
See Appendix G and H
If alarm persists, protection (CHip
A) function may still be present if
STATUS LED is flashing.
However, its values cannot be
communicated properly to the
Display.
Ref. Fig. 3.1 and Section 3.2.1
CIRCUIT BREAKER DOES
NOT COMMUNICATE WITH
PowerNet, BIM
II
Addressing
1. Check for Aux Power A14, A15
2. Check address and board settings
3. Check status LED and Transmit LED
4. Check communication wiring B1, B2
5. Termination
resistor
missing.
See Appendix G
See Section 4.2.3
See Fig. 4.9
NO VOLTAGE READINGS IN
METER MENU
No VT inputs to secondary
contacts
1. Check for external VT wiring
2. Replace breaker PT Module
Ref. Appendix C
CHECK AUX. SWITCH
(Alarm)
The 52b Aux. Switch input to
Digitrip is not operating
properly.
1. Check Aux. Switch continuity to connector
K2-1 and K2-2
2. If secondary testing is done, close
breaker and retest.
Ref. Appendix C
RAM
ALARM
Memory Error
1. Push Reset Button
2. Replace unit if alarm reappears
Replace Trip Unit at First
Opportunity.
