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Correct curve
3.
13 Impossible change any
parameter
PR122/DC alarm situation FN
14 Temp.4. Curve too low
3.n 1SDH000635R0002
Page No. Curve I2t inserted
1.3
17 Led lighting See 12.4. open
1.2. Send/communicate all the information collected, together with the circuit diagram for the circuit-breaker, your nearest ABB Customer Support
service. Situation Possible causes Suggestions
1 The trip test cannot run The busbar current 0. Local setting
2.
2.4) and the version.
2. indicates the norm ratio fthe PR122/DC.6. FN, see 12.
N ote:
1.
Model 3447 pparatus Scale
d c.First installation
2. Temperature out range
1.5. not open
1.5
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.
No. Open CB
12.2.6. FN
2. 12. Correct threshold
2. Curve too high
3. 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.
3. Check the messages the display
2 Trip times lower than expected Threshold too low
2. Exclude not necessary
4. 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. The SdZ inserted
1. Exclude not necessary
3 Trip times higher than expected Threshold too high
2.1
12 The password not requested The password has been disabled FN, re-enter the password with value
other than 0000.7 tin 122/D unit
The following table lists series typical service conditions, help you understand and solve hypothetical faults malfunctions.1
2.2. Correct curve
3. Thermal memory enabled
4. FN, see 12.
47/108
. not present, disable PR021/K,
see 12. sensor" or
" Start-up" message
Possible failure inside relay Contact ABB Sace
15 Invalid date 1. Information lost due power
failure
FN see 12.9.7.6. 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.
2.1
18 The language cannot changed The relay remotely set
2. Before consu lting the follow ing table, for any error essages appearing for som con the display. Note down the type circuit-breaker, number poles, any accessories connected, In, Serial Number (see par.1
16 Untimely trip See 12.2. The not connected
3.5. case ere sugg estions pro not lead solution fth roblem please the assistance service. 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.
3.3
2.
2.2. Check bus connection
3.1 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.
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.3. Correct threshold
2
