11:1 General
This chapter is a guide that can be used in case problems arise with the softstarter or the application.
The softstarter normally indicates a fault with LED Fault, and the LCD displays what type of fault it is. When a protection is activated, it will be indicated with LED Protection
and the LCD displays what type of protection is active.
Faults not displayed in the softstarter can also be found in this chapter.
11:2 Overview of indications
This table shows in which state the different indications for protections, faults and warning may show up.
LCD indication
Active when selected Always active Active when selected
Prot Motor OL
Prot Underload
Prot Locked Rot
Prot High I
Prot Phase Imb
Prot Phase Rev
Prot PTC
Prot SCR OL
Fault Phase Loss
Fault Connection
Fault Wrong Freq
Fault Line Side
Fault HS Temp
Fault Kick-Cur
Fault SC SCR
Fault Open SCR
Fault FB Timeout
Fault BP Closed
Fault BP Open
Warn OL
Warn SCR OL
Warn I=High
Warn I=Low
Stand by
X – – X – – X X – – – – X – – X
1
– – X X – –
At start signal
X – – X – X X X X X X X X
X
2
X – X
1
– – X X – –
Ramp up
X – – X – – X X X – – – X – X X
1
– – X X – –
TOR
X X X X X – X X X – – – X – X X
1
– X
3
X X X X
At stop signal
X – – X – – X X X – – – X X
4
X X
1
X
3
– X X – –
Ramp down
X – – X – – X X X – – – X X X X
1
– – X X – –
1) Only if Fieldbus control is selected
2) Only if Kick-start is selected.
3) Only if by-pass is used.
4) Only if by-pass is not used.
11:3 General problems and faults
Status Possible cause Solution
Motor humming/starts without given start signal Shorted SCR
By-pass contactor stuck in the closed position
Check and replace
Check and correct the reason
Bad motor sound during start and operation Inside Delta connection wrong Check and correct the wiring
Bad motor sound during stop Wrong ramp time for stop Try different ramp times (some adjustments may be
necessary for best result)
Motor does not start when giving start command using
the hardware inputs
Control wiring not correct
Start and stop command given at the same time
Keypad is in Local Control menu
Check connections for start and stop
Check that start and stop command is not given at the
same time
Check that the keypad is not in Local Control menu
Check that parameter Fieldbus Ctrl is set to No.
Motor does not start when giving start command using
the eldbus communication
Setting of eldbus parameter wrong Check that parameter Fieldbus Ctrl is set to Yes
Check that bit “Enable” is used
Check that programmable inputs have correct settings
Displayed current in LCD does not correspond to mo-
tor current
Inside Delta connection If the softstarter is connected inside Delta, the current
displayed is 58% (1/( 3)) of the motor current.
Displayed current in LCD is not stable The motor is too small
The load on the motor is too small (current is out of
measuring range)
Check that the softstarter corresponds to the m
Loading of parameters does not work properly Fieldbus settings See Chapter 8 Fieldbus for actual eldbus type
Chapter 11
Troubleshooting
11.2 Low Voltage Products & Systems
1SXU 132 021 M0201 ABB Inc. • 888-385-1221 • www.abb-control.com
11
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