Status
Possible cause
Solution
Current underload protection
The motor current has fallen below
the settable value.
•
Check and correct the reason for the underload.
•
Check that the motor current parameter (Ie) is set
correctly.
User defined protection
Programmable digital input can be
used in combination with external
device/sensor to provide to the
user the possibility of handling
own defined protection.
•
Set the programmable input signal to inactive state
before resetting the protection event.
Too long current limit protection
The time at current limit has
exceeded the set value.
The starting condition is too heavy
for the set current limit.
•
Check starting conditions and parameters.
By-pass open protection
By pass contactor or relay does
not close when reached TOR.
•
Check and contact your ABB sales office.
Fieldbus failure protection
There is a communication
disturbance between the
softstarter and PLC.
•
Check that the fieldbusplug is connected correctly.
•
Check that correct type of fieldbusplug is used.
•
Check that the parameter Fieldbus Type is set
according to the present fieldbus type.
Extension I/O failure protection
There is communication
disturbance between the
softstarter and the extension I/O
module.
•
Check and correct the connections.
HMI failure protection
There is communication
disturbance between the
softstarter and the HMI.
•
Check and correct the connections.
The HMI has been removed.
•
Place back the HMI again.
Limit number of starts
The softstarter has exceeded the
pre-set limited number of starts.
•
Wait for the next start interval.
For parameter setting,
see chapter 7 Functions.
10.5 Fault indication shown on screen
For Faults description,
see chapter 7.21 Faults (26) Internal faults (27) External faults
Table 3
Fault indication
Status
Possible cause
Solution
Phase loss fault
Voltage to one or more phases is
missing.
•
Check that the mains are connected and that no line
contactor or breaker is open.
Fuse is blown.
•
Check and replace fuses for all three phases.
Power loss on operational current
for one or several phases.
•
Check and correct operational network supply.
The line contactor or circuit
breaker is open.
•
Check and close contactor/breaker or any external
switch device.
Line contactor opens too quickly
at stop.
•
Control Line contactor with Run signal relay on
terminal 4. See
5.1.2.5 Programmable output relay -
K4, terminals 4, 5 and 6.
•
Add a time relay before contactor opens.
•
If Stop Ramp not is needed, set Stop mode to direct
stop.
High current fault
A fault current, higher than 8 times
the softstarter rated current, has
occurred.
•
Check the circuits, including the motor for any
insulation fault phase to phase or earth fault.
Low supply voltage fault
The control supply voltage is too
low on terminals 1 and 2.
•
Check for voltage dips or interruptions and correct
control supply voltage.
Short power loss on the control
supply network.
•
Check control supply network for short interruptions.
10
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
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