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