Fault List - Eaton PowerXL DC1 20 Series Installation Manual

5.3 Fault list

The following table shows the failure codes, the possible causes and
indicates corrective measures.
Table 31: Error messages list
Message Error no.
[dez]
–
Stop
01
OI-b
02
OL-br
03
O-I
04
I. t -trP
DC1...20... and DC1...OE1 Variable Frequency Drives 02/20 MN040059EN www.eaton.com
Possible causes and fixes
Ready to start. There is no drive enable signal present. There are no fault
messages present.
Excessively high braking current
• Check the brake resistor and its wiring for short-circuits and ground faults.
• Make sure that the braking resistance value is not lower than the minimum
permissible braking resistance.
Thermal overload on brake resistor. The drive has been switched off in order to
prevent the brake resistor from being thermally destroyed. This message will
only be output if P-34 = 1 ("braking chopper")
• Make the P-04 and P-24 ramp times longer in order to have less frequent
braking.
• Reduce the load's inertia (if possible).
If the protection achieved with P-34 = 1 is not adequate for the brake resistor
being used:
• Provide external protection for the brake resistor and set P-34 to a value of 2.
Overcurrent at variable frequency drive output
Occurs right after switching on the unit:
• Check the cable connection between the variable frequency drive and the
motor
• Check the motor for shorted turns and ground faults
Occurs when starting the motor:
• Check whether the motor can rotate freely and make sure that it is not being
blocked mechanically.
• Motor with mechanical brake: Check whether the brake is being applied.
• Check the connection configuration (star/delta)
• Check to make sure that the correct rated motor current has been entered in
P-08
• Increase the acceleration ramp time (t-acc, P-03) if necessary.
• Reduce the voltage boost with P-11.
Occurs during operation at a constant speed:
• Check whether the motor is overloaded.
Occurs during acceleration/deceleration:
• The ramp times are too short and require too much power.
If P-03 / P-04 cannot be increased, a larger device may be required.
Motor overload. The thermal protection mechanism has tripped as a result of the
device being run above the rated motor current set with P-08 longer than a
specific time.
• Check to make sure that the rated motor current has been entered in P-08.
• Check the motor's connection configuration (e.g., start/delta)
• If the decimal points on the display flash during operation, this means that
the unit is being run in its overload range (> P-08). In this case, use P-03 to
make the acceleration ramp longer or reduce the load.
• Check whether the motor is being blocked mechanically or whether there are
any additional loads.
5 Error Messages
5.3 Fault list
139