ABB PSTX720 - Page 159

1SFC132081M0201 | Installation and commissioning manual | Troubleshooting 159
Status Possible cause Solution
Bad motor sound during start.
Bad motor sound during stop.
Incorrect Initial/End level. • Try different settings for the parameter Initial /End
Voltage. See chapter 7 Functions, or speak to your
ABB Sales Office..
Incorrect Current limit level
or Torque limit level.
• Try different settings for the parameter Current limit
level or Torque limit level. See chapter 7 Functions,
or speak to your ABB Sales Office.
The motor is too small.
(Current is out of measuring
range.)
• Make sure that you have the correct Softstarter for
this motor size.
For test purposes you can use small motor mod. See
chapter 7 Functions.
Thyristor conductivity is bad. • Contact your ABB Sales Office.
Incorrect ramp time for start.
• Make sure that you have the correct Softstarter for
this motor size.
For test purposes you can use small motor mode.
See chapter 7 Functions.
Start and stop command given at
the same time.
• Make sure that start and stop command is not given
at the same time.
The operation voltage is below
175 V.
• Do a check of the operation voltage.
Motor does not start when given start
command by the hardwire inputs.
Control wiring is not correct.
Start and stop command given at
the same time.
Keypad is in Local control mode.
• Do a check of the connections for start and stop.
• Make sure that start and stop command is not given
at the same time.
• Make sure that the keypad is not in Local Control
mode.
• Push the R\L-key to change to Remote Control mode.
• Make sure that parameter Fieldbus control is set to
No.
• Do a reset on an active event.
• Reset tripping events.
Motor does not start with Fieldbus. Softstarter has tripped on fault or
protection.
• Do a reset on an active event.
Reset tripping events.
Softstarter is in Local mode.
• Make sure that the Stop bit of the binary output
telegram setting is set to 1.
• Make sure that parameters match between the PLC
and the Softstarter Fieldbus documentation for the
used Fieldbus protocol.
• Make sure that the Auto mode bit of the binary output
telegram setting is set to 1.
• Do a check if the HMI is set to remote mode.
• Make sure that the Local Mode digital input on the
ABB FieldBus Plug adapter is set to Remote.
• Make sure that Fieldbus disable control in DI is not
connected.
• Make sure that the Fieldbus control parameter is set
to On.
Fieldbus operation when fault
parameter is set to Change to I/O
control.
• If the parameter Fieldbus failure op is set to Change to
I/O control when fault occurs, there is a 10 seconds
delay before you can re-start after communication is
connected.
10