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3
2. FN, see 12. Curve too high
3.
47/108
. FN
2. Prepare brief description the opening (what LEDs and/or indications were displayed? when did happen?, how many times was always
under the same conditions? what type load? what voltage? what current? the event reproducible?)
4. Situation Possible causes Suggestions
1 The trip test cannot run The busbar current 0.1 the case fault
A you suspect that the PR122/DC faulty, has malfunction has generated unwanted trip, advisable follow the
recommendations below very carefully from the Measurements menu ►Historicals Trip:
1.
3. Before consu lting the follow ing table, for any error essages appearing for som con the display.
2.
Model 3447 pparatus Scale
d c.
2.5. Correct curve
3. Check PR021/K
9 Message ""
instead expected data
Function disabled data
out range
FN
10 The expected trip does not occur Trip function disabled enable trip necessary
11 display
of the opening data
Vaux missing, the buffer
capacitor discharged
FN, see 12.
2.6. Local setting
2.2.7. Thermal memory enabled
4. Exclude not necessary
4.5. Exclude not necessary
4 Rapid trip, with I3=Off Iinst tripped with short-circuit with high I
5 Display off Vaux missing and the
voltage below the minimum value. Curve I2t inserted
1.1
12 The password not requested The password has been disabled FN, re-enter the password with value
other than 0000.2. Temperature out range
1.2. Check the messages the display
2 Trip times lower than expected Threshold too low
2. Check bus connection
3. Information lost due power
failure
FN see 12.2.
3.1
2.2.3
17 Led lighting See 12.9.6. Correct threshold
2.1
16 Untimely trip See 12. Note down the type circuit-breaker, number poles, any accessories connected, In, Serial Number (see par.
The completeness and accuracy the information given the ABB Assistance service will facilitate technical analysis the problem encountered,
and will allow carry out all actions useful for the user rapidly.First installation
2.
2. open
1. Send/communicate all the information collected, together with the circuit diagram for the circuit-breaker, your nearest ABB Customer Support
service.5
6 The display not back-lit Volatge below the
limit for lighting the display
FN
7 Reading incorrect Current below the minimum threshold
that can displayed
FN
8 Local Bus" message
on display
No communication between
PR122/DC and PR021/K
1. The not connected
3.
No. The SdZ inserted
1. indicates the norm ratio fthe PR122/DC. sensor" or
" Start-up" message
Possible failure inside relay Contact ABB Sace
15 Invalid date 1.n 1SDH000635R0002
Page No. Exclude not necessary
3 Trip times higher than expected Threshold too high
2. not present, disable PR021/K,
see 12.3. Make note the type protection that has tripped accessing the LAST TRIP page there external power supply (Vaux battery)
or pressing Test" self-supply mode.7 tin 122/D unit
The following table lists series typical service conditions, help you understand and solve hypothetical faults malfunctions.
N ote:
1.
13 Impossible change any
parameter
PR122/DC alarm situation FN
14 Temp. Correct threshold
2. 12.4) and the version. case ere sugg estions pro not lead solution fth roblem please the assistance service. FN, see 12.6.1
18 The language cannot changed The relay remotely set
2. Open CB
12. not open
1.4. Curve too low
3. Correct curve
3.4
