Troubleshooting; Fault Messages - ABB ACS255 User Manual

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13. Troubleshooting

13.1. Fault messages

Fault Code No. Description
 00 No Fault
 01 Brake channel over current
 02 Brake resistor overload
 03 Instantaneous over current on drive
output.
Excess load on the motor.
 04 Drive has tripped on overload after
delivering >100% of value in
parameter 9906 for a period of time.
 05 Hardware Over Current
 06 Over voltage on DC bus
 07 Under voltage on DC bus
 08 Heatsink over temperature
 09 Under temperature
 10 Factory Default parameters have
been loaded
 11 External trip
 12 Communications Fault
Corrective Action
Displayed in Parameter 0401 if no faults are recorded in the log
Ensure the connected brake resistor is above the minimum permissible level for the drive –
refer to the ratings shown in section 11.2.
Check the brake resistor and wiring for possible short circuits.
The drive software has determined that the brake resistor is overloaded, and trips to protect
the resistor. Always ensure the brake resistor is being operated within its designed parameter
before making any parameter or system changes.
To reduce the load on the resistor, increase deceleration the time, reduce the load inertia or
add further brake resistors in parallel, observing the minimum resistance value for the drive
in use.
Fault Occurs on Drive Enable
Check the motor and motor connection cable for phase – phase and phase – earth short
circuits.
Check the load mechanically for a jam, blockage or stalled condition
Ensure the motor nameplate parameters are correctly entered in parameter 9905, 9906, and
9907.
If operating in Vector mode (Parameter 9903 – 0 or 1), also check the motor power factor in
parameter 9915 and ensure an autotune has been successfully completed for the connected
motor.
Reduced the Boost voltage setting in parameter 2603
Increase the ramp up time in parameter 2202
If the connected motor has a holding brake, ensure the brake is correctly connected and
controlled, and is releasing correctly
Fault Occurs When Running
If operating in Vector mode (parameter 9903 – 0,1,3), reduce the speed loop gain in
parameter 2301
Check to see when the decimal points are flashing (drive in overload) and either increase
acceleration rate or reduce the load.
Check motor cable length is within the limit specified for the relevant drive in section 10.2
Ensure the motor nameplate parameters are correctly entered in parameter 9905, 9906, and
9907.
If operating in Vector mode (Parameter 9903 – 0 or 1), also check the motor power factor in
parameter 9915 and ensure an autotune has been successfully completed for the connected
motor.
Check the load mechanically to ensure it is free, and that no jams, blockages or other
mechanical faults exist
Check the wiring to motor and the motor for phase to phase and phase to earth short
circuits. Disconnect the motor and motor cable and retest. If the drive trips with no motor
connected, it must be replaced and the system fully checked and retested before a
replacement unit is installed.
The value of the DC Bus Voltage can be displayed in parameter 0107
A historical log is stored at 256ms intervals prior to a trip in parameter 0191
This fault is generally caused by excessive regenerative energy being transferred from the
load back to the drive. When a high inertia or over hauling type load is connected.
If the fault occurs on stopping or during deceleration, increase the deceleration ramp time
2203 or connect a suitable brake resistor to the drive.
If operating in Vector Mode, reduce the speed loop gain in parameter 2301
This occurs routinely when power is switched off.
If it occurs during running, check the incoming supply voltage, and all connections into the
drive, fuses, contactors etc.
The heatsink temperature can be displayed in parameter 0110.
A historical log is stored at 30 second intervals prior to a trip in parameter 0193
Check the drive ambient temperature
Ensure the drive internal cooling fan is operating
Ensure that the required space around the drive as shown in sections 0 on page 17 has been
observed, and that the cooling airflow path to and from the drive is not restricted
Reduce the effective switching frequency setting in parameter 2606
Reduce the load on the motor / drive
Trip occurs when ambient temperature is less than -10°C. The temperature must be raised
over -10°C in order to start the drive.
Press STOP key, the drive is now ready to be configured for the required application
E-trip requested on control input terminals. Some settings of parameter 9902 require a
normally closed contactor to provide an external means of tripping the drive in the event that
an external device develops a fault. If a motor thermistor is connected check if the motor is
too hot.
Communications lost with PC or remote keypad. Check the cables and connections to
external devices