B2342
Emax VF
49/66
Doc. No
Model
Apparatus
Scale
Page No
1SDH000909R0001
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
Possible cause
Suggestion
1
The trip test cannot be run
1. The busbar current is > 0
2. The TC is not connected
3. AUX missing
1. FN
2. Check message on Display.
3. FN
2
Trip times lower than expected
1. Threshold too low
2. Curve too low
3. Unstable value of AUX
1. Correct threshold
2. Correct curve
3. Check the AUX value stability
3
Trip times higher than expected
1. Threshold too high
2. Curve too high
1. Correct threshold
2. Correct curve
4
Display off
1. Faulty voltage sockets connection
2. AUX missing
3. Temperature out of range
1.
Check the socket connection
2. FN
3. FN
5
The display is not back-lit
1. AUX ON, but below limit AUX-20%.
2. AUX OFF, and Frontal unit connect-
ed
1. Check AUX
2. FN
6
I Reading out of accuracy
Current below the minimum threshold,
or current out of range or current distor-
tion out of range.
FN
7
Message “” instead of expected data
Function disabled or data out of range
FN
8
The expected trip does not occur
Trip function disabled
FN enable trip if necessary
9
After a trip and iTest use, no display of
the opening data
AUX missing, and the buffer capacitor
is discharged
FN if more than 48h has elapsed
10
The password is not requested
The password has been disabled
FN, re-enter the password with a
value other than 0000
11
Impossible to change any parameter
from display menu
1. PR122/VF in alarm situation
2. Unit in Remote configuration
1. FN
2. FN
12
“Temp. sensor” or
“Start-up” message
Possible failure inside trip unit
Contact ABB Sace
13
Invalid date
First installation or information lost
Set Date
14
Language cannot be changed
CB not open
Open CB
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.