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Exclude not necessary
4.7 tin 123/P unit
The following table lists series typical service conditions, help you understand and solve hypothetical faults malfunctions. Correct Neutral Selection
5. the casewhere thesuggestions proposed not lead asolution ofthe problem, pleasecontacttheABBSACEassistance service. Exclude not necessary
3 Trip times higher than expected Threshold too high
2. 2
Page No.4. Function prevented with I>4In
1. Temperature out range
1.
N itu tio ssib tio s
1 The trip test cannot run The busbar current 0
2. Information lost due power
failure
FN see 13. The not connected
1.2. Beforeconsulting thefollowing table, checkforanyerror messagesappearing forsomeseconds thedisplay.
2. Open CB
3. Power the relay
Model 2234 Apparatus Scale
L 2778
Doc.4. Correct threshold
2. Correct threshold
2.
2.2. Curve too low
3. Incorrect Neutral Selection
1.4. Check bus connection
3. FN
6 Display off Vaux missing and the current and/or
voltage are below the minimum value.5. Curve too high
3. FN, see 14. FN, see 14.5
14 display the opening data Vaux missing,the buffer capacitor
is discharged
FN, see 14.9.5
2.6.1
2.8
7 The display not back-lit Current and/or voltages below the
limit for lighting the display
FN
8 Reading incorrect Current below the minimum threshold
that can displayed
FN
9 Reading and power
factor incorrect
1) Connection error between VT
and PR120/V
2) Voltage parameter setting error
1) Check connections between and
PR120
2) Set correct parameters
10 Local Bus" message
on display
No communication between PR123/P
and PR021/K
1. Check PR021/K
11 Message ""
instead expected data
Function disabled data out of
range
FN
12 The expected trip does not occur Trip function disabled enable trip necessary
13 activation the Unbalance
U protection
Values out range FN, see 14.1
15 The password not requested The password has been disabled FN, re-enter the password with value
other than 0000
16 Impossible change any parameter PR123/P alarm situation FN
17 Temp. The SdZ inserted
1. Exclude not necessary
4. Thermal memory enabled
4. FN
2.9.2. not present, disable PR021/K,
see 14.6. Correct curve
3. not open
3.1
21 The language cannot changed Relay remotely set
2. indicates the normal operation ofthe PR123/P. Incorrect Neutral Selection
5.3
20 LED lighting see 13. sensor
2.
3. Curve I2t inserted
4. ext.
111/158
. Set int.5. Check the messages the display
2 Trip times lower than expected Threshold too low
2. Set locally
2.N°.Error message escription
1A Invalid date Date has not been set
1A Parameters revised Programming session concluded correctly
1A Cancelled Programming session cancelled
1A Failed Programming session rejected
14.6. Correct curve
3. Vaux PR120/V PR030/B
not installed
1.3.1
19 Untimely trip see 13. sensor" or
" Start-up" message
Possible failure inside relay Contact ABB Sace
18 Invalid date First installation
2. Correct Neutral Selection
4 Rapid trip, with Off Iinst tripped with short-circuit with high I
5 High earth but trip happens Incorrect selection the sensor
2.2.
Note:
1
