Troubleshooting - ABB Tmax T7 Operating Instructions Manual

3.14. Troubleshooting

3.14.1. Troubleshooting
The following table lists a series of typical service conditions, to help you understand and solve hypothetical faults or malfunctions.
Note:
1. Before consulting the following table, check for any error messages appearing for some seconds on the display.
2. FN indicates that the protection release is operating normally.
3. In the case where the suggestions proposed do not lead to a solution of the problem, please contact the ABB assistance
service.
4. If possible, use the external communication units and supply a report downloaded by means of Ekip Connect.
N° Situation
1 The trip test cannot be run
2 Trip times lower than ex-
pected
3 Trip times higher than
expected
4 Rapid trip, with I3=Off
5 High earth I, but no trip
happens
6 Display off
7 The display is not back-lit
8 Reading of I incorrect
9 Reading of V, W and power
factor incorrect
10
" Local Bus" message
on display
11 Message "" instead of
expected data
12 The expected trip does not
occur
13 No activation of the Unbal-
ance U protection
14 No display of the opening
data
15 The password is not re-
quested
16 Impossible to change any
parameter
17
" Temp. sensor" or
" Start-up" message
18 Invalid date
19 Untimely trip
20 LED lighting
21 The language cannot be
changed
22 The activation contact
of protection MM is not
closed
B0431
Mod.
Possible causes
1. The busbar current is > 0
2. The TC is not connected
1. Threshold too low
2. Curve too low
3. Thermal memory enabled
4. Incorrect Neutral Selection
5. The SdZ is inserted
1. Threshold too high
2. Curve too high
3. Curve I t inserted
2
4. Incorrect Neutral Selection
Iinst tripped
1. Incorrect selection of the sensor
2. Function G prevented with I>4In
1. Vaux missing and the current and/or
voltage are below the minimum value.
2. Temperature off range
Current and/or voltages below the limit for
lighting the display
Current below the minimum threshold that
can be displayed
1. Connection error between VT and
PR330/V
2. Voltage parameter configuration error
No communication between PR333/P
and Flex
Interface or HMI030
Function disabled or data off range
Trip function disabled
Values of I out of range
Vaux missing,the buffer capacitor is dis-
charged
The password has been disabled
PR333/P in alarm situation
Possible fault inside the protection release Contact ABB
1. First installation
2. Information lost due to power failure
1. The protection release is configured in
the remote mode
2. CB not open
3. Vaux or PR330/V or PR030/B not in-
stalled
Protection MM has not been enabled or
K14/15 has no incoming signal
B1751
Suggestions
1. FN
2. Check the messages on the display
1. Correct threshold
2. Correct curve
3. Exclude if not necessary
4. Correct Neutral Selection
5. Exclude if not necessary
1. Correct threshold
2. Correct curve
3. Exclude if not necessary
4. Correct Neutral Selection
FN with short-circuit with high I
1. Set int. or ext. sensor
2. FN
1. FN, see par. 1.4.3
2. FN, see par. 1.3.7 and see par. 1.6.17
FN
FN
1. Check connections between VT and PR330/V
2. Set correct parameters
1. If not present, disable PR021/K, see par. 1.9.3
2. Check bus connection
3. Check external device
FN
FN enable trip if necessary
FN, see par. 1.6.11
FN, see par. 1.7.2
FN, re-enter the password with a value other
than 0000
FN
Change date, see par. 1.9.8
See par. 1.4.3.2
See par. 1.4.1
1. Set locally
2. Open CB
3. Power the protection release
Check the menu to make sure that the protec-
tion is enabled and use a tester to check that
voltage and polarity at the ends of K14 and K15
are correct
Apparatus
Emax X1-Tmax T7-Tmax T8
1SDH000587R0002
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