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12.6.2. Troubleshooting
The following table lists a series of typical service conditions, to help you understand and solve hypothetical faults or malfunctions.
WARNING: Before consulting the following table, check for any error messages appearing for some seconds
on the display. For FN will be indicated the correct functioning of the PR122/VF.
If the suggested action does not lead to a solution of the problem, please contact the ABB SACE assistance service.
#
Situation
1
The trip test cannot be run
2
Trip times lower than expected
3
Trip times higher than expected
4
Display off
5
The display is not back-lit
6
I Reading out of accuracy
7
Message "" instead of expected data
8
The expected trip does not occur
After a trip and iTest use, no display of
9
the opening data
10
The password is not requested
Impossible to change any parameter
11
from display menu
"Temp. sensor" or
12
"Start-up" message
13
Invalid date
14
Language cannot be changed
In case of fault, follow the instruction below:
- Make a note of the type of protection that has tripped by accessing the LAST TRIP page if there is an external power supply (AUX
or exteranl unit from frontal connector) or by pressing "i Test".
- Note down the type of CB, any accessories connected, the nominal current,trip unit Serial Number and the SW version.
- If possible use the function available with Ekip connect that makes the complete page report.
- Prepare a brief description of the opening (what LEDs and/or indications were displayed? when did it happen?, how many times ?,
was it always under the same conditions? what type of load? what voltage? what current? is the event reproducible?)
- Send/communicate all the information collected, together with the circuit diagram for the circuit-breaker, to your nearest ABB Cus-
tomer Support service.
WARNING: If you suspect that the PR122/VF is faulty, has a malfunction or has generated an unwanted trip, it
is advisable to follow the recommendations above very carefully, referring the trip history.
The completeness and accuracy of the information given to the ABB Assistance service will facilitate technical analysis of the problem
encountered, and will allow us rapidly carry out all actions to help the user.
B2342
Model
Possible cause
1. The busbar current is > 0
2. The TC is not connected
3. AUX missing
1. Threshold too low
2. Curve too low
3. Unstable value of AUX
1. Threshold too high
2. Curve too high
1. Faulty voltage sockets connection
2. AUX missing
3. Temperature out of range
1. AUX ON, but below limit AUX-20%.
2. AUX OFF, and Frontal unit connect-
ed
Current below the minimum threshold,
or current out of range or current distor-
tion out of range.
Function disabled or data out of range
Trip function disabled
AUX missing, and the buffer capacitor
is discharged
The password has been disabled
1. PR122/VF in alarm situation
2. Unit in Remote configuration
Possible failure inside trip unit
First installation or information lost
CB not open
Apparatus
Doc. No
Suggestion
1. FN
2. Check message on Display.
3. FN
1. Correct threshold
2. Correct curve
3. Check the AUX value stability
1. Correct threshold
2. Correct curve
1. Check the socket connection
2. FN
3. FN
1. Check AUX
2. FN
FN
FN
FN enable trip if necessary
FN if more than 48h has elapsed
FN, re-enter the password with a
value other than 0000
1. FN
2. FN
Contact ABB Sace
Set Date
Open CB
Emax VF
1SDH000909R0001
Scale
Page No
49/66
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