Installation and commissioning
DIGIDRIVE
Variable speed drive
72
Réf. 3218 GB - 4.33 / d - 02.02
LEROY-SOMER
5 - FAULTS - DIAGNOSTICS
5.1 - Error messages
When the DIGIDRIVE detects a fault, the left-hand display indicates "tr", while the right-hand
display indicates one of the codes listed in the following table:
After consulting the fault table, proceed as follows:
- Carry out the necessary checks in order to eliminate the cause of the fault.
- Check that the drive is locked (terminal 9 open).
- Press the key: if the drive is no longer faulty, the left-hand display indicates "ih".
- To restart the motor, unlock the drive by closing terminal 9, and open and then reclose
terminal 10 for Run forward operation or terminal 11 for Run reverse operation.
• Opening and then closing the unlock terminal may clear the fault. If the FWD or
REV terminal is closed at the time of clearing the fault, the motor will start
immediately.
No.
Display
mnemonic
Reason for fault Points to check Solution
1UU
DC bus undervoltage
(<180VDC for "M",
"TL", or "M/TL" types;
< 400 VDC for "T"
types)
•Power supply terminals
L1, L2, L3
mains supply
overvoltage
• Check the mains
supply
• Check the power
components
2OU
DC bus overvoltage
(>420VDC for "M",
"TL"
or "M/TL" types;
> 830VDC for "T"
types)
•Deceleration too
fast (inertial load)
•Terminals L1, L2, L3
mains supply
overvoltage
• Program a longer
deceleration time in 0
0
4
4
• Check the deceleration
mode in 3
3
0
0
• Use a braking resistor
(optional)
• Check the mains supply
3 OI.AC
Overcurrent at
drive output
•Power terminal block
U, V, W
•Wiring
• Eliminate the short-circuit
at the drive output
• Program a longer
acceleration time in 0
0
3
3
• If the motor and/or the
motor connections have
been changed, repeat
autocalibration (see 3
3
8
8
)
• Wait at least 10 seconds
before resetting the drive
4 OI.br
Overcurrent in
braking transistors
•Power terminal blocks
(+, DBR or •, -)
• Value of the
braking resistor
• Wait 10 seconds
before reinitialising the
drive
• Eliminate the short-circuit
at the resistor output
• Set a higher ohmic
resistance
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