ABB PSTX30 Installation And Commissioning Manual page 140

Status
Bad network fault
Thyristor overload fault
Short circuit fault
Shunt fault
Unspecified fault
Heat sink fault
Open circuit thyristor fault
10
Faulty usage
Faulty connection
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Possible cause
Excessive disturbances in the
operational supplying network.
Short power loss on all three
phases in the operational network.
The thyristors are overheated.
One or several thyristors are
shorted.
The softstarter can not stop the
motor due to internal
short circuit.
By-pass relay closed, due to
inaccurate handling.
(PSTX30...170 only).
N/A
The heat sink temperature is too
high. If the fault remains after
reset, the heat sink is too warm
and needs to cool down.
One or several thyristors are not
conducting.
The Operational voltage is below
175 V.
The motor is too small.
(Current is out of measuring
range.)
Inside delta motor connection
when trying to jog forward, jog
backward, heat motor or doing
stand still break.
Motor connection unknown when
trying to start motor.
Solution
• Check for harmonics or frequency disturbancein the
supply network and correct supplying operational
network.
• Check and correct supplying operational
network.
• Check the starting conditions and the fans.
• Decrease current limit if possible.
• Let the thyristors cool down before restart.
• Check and contact your ABB sales office for
replacement kit.
• Contact ABB sales office for service.
• Switch off operational voltage and control supply
voltage. Switch on voltage in correct succession.
1. Control supply voltage on terminals
1 and 2. See chapter 5.1.2 Control supply and
control circuit.
2. Wait 4 seconds, and then switch on operational
voltage on terminals
L1, L2 and L3.
• If same fault remains, contact your
ABB Sales Office.
• Disconnect and reconnect the supply
voltage (Us) and make a restart.
• If same fault remains, contact your ABB
sales office.
• Check that the fans are working in a proper way.
• Check that cooling airways are free from dirt and dust.
• Check that the ambient temperature is not too high.
• Contact your ABB sales office for service.
• Check that the softstarter corresponds to the motor
size.
• For test purposes it is possoble to use small motor
mode. See chapter 7 Functions.
• Do not use named functions with Inside delta motor
connection.
• Check motor connection.