Troubleshooting
ASTAT XL Service Manual
Display
Possible cause/Suggested solution
L1-T1 shorted
L2-T2 shorted
L3-T3 shorted
During pre-start checks the starter has detected a shorted SCR or a short
within the bypass contactor as indicated. If the starter is connected in-line
with the motor, consider using PowerThrough to allow operation until the
starter can be repaired.
NOTE
PowerThrough is only available with in-line installations. If the
starter is installed inside delta, PowerThrough will not operate.
The starter will trip on Lx-Tx Shorted on the first start attempt after
control power is applied. PowerThrough will not operate if control
power is cycled between starts.
Related parameters: 15E
Low Control Volts
The ASTAT XL has detected a drop in the control voltage.
•
Check the external control supply (terminals A4, A5, A6) and reset the
starter.
If the external control supply is stable:
•
the 24 V supply on the main control PCB may be faulty; or
•
the bypass driver PCB may be faulty (internally bypassed models only).
Contact your local supplier for advice.
This protection is not active in Ready state.
Related parameters: 16M
Low Level
This is a name selected for a programmable input. See Input A trip.
Low Pressure
This is a name selected for a programmable input. See Input A trip.
Motor overload
Motor 2 overload
The motor has reached its maximum thermal capacity. Overload can be
caused by:
•
The soft starter protection settings not matching the motor thermal
capacity
•
Excessive starts per hour
•
Excessive throughput
•
Damage to the motor windings
Resolve the cause of the overload and allow the motor to cool.
Related parameters: 1A, 1B, 1C, 1D, 2A, 2B, 3A, 3B, 16A
Motor Connection Tx
Where 'X' is 1, 2 or 3.
The motor is not connected correctly to the soft starter for in-line or inside
delta use.
•
Check individual motor connections to the soft starter for power circuit
continuity.
•
Check connections at the motor terminal box.
This trip is not adjustable.
Related parameters: None
Motor thermistor
The motor thermistor input has been enabled and:
•
The resistance at the thermistor input has exceeded 3.6 k
Ω
for more than
one second.
•
The motor winding has overheated. Identify the cause of the overheating
and allow the motor to cool before restarting.
•
The motor thermistor input has been opened.
NOTE
If a valid motor thermistor is no longer used, a 1.2 k
Ω
resistor must
be fitted across terminals 64, 65.
Related parameters: 16G
Network
communication
(between module and
network)
The network master has sent a trip command to the starter, or there may be a
network communication problem.
Check the network for causes of communication inactivity.
Related parameters: 16L
DET-813
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