AuCom MVE Series User Manual page 69

TROUBLESHOOTING
Display
Low Control Volts
Low Level
Low Pressure
Motor connection
Motor Connection
T1
Motor Connection
T2
Motor Connection
T3
Motor overload
Motor Protection
Motor
Temperature
Motor thermistor
Network
communication
No Flow
Overvoltage
Phase sequence
68
| MVE User Manual (710-17074-00H)
Possible cause/Suggested solution
The MVE has detected a drop in the internal control voltage.
• Check the external control supply (A1, A2, A3) 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. Contact your local supplier for advice.
This protection is not active in Ready state.
Related parameters: None
This is a name selected for a programmable input. Refer to Input A trip.
This is a name selected for a programmable input. Refer to Input A trip.
There is a problem with the soft starter's connection to the motor. If only one phase is
affected, the error message will indicate which phase (T1, T2, T3).
• Ensure the motor is connected to terminals T1, T2, T3 using in-line (three wire)
connection. The MVE does not support inside delta (six wire) connection.
• Check that the fibre-optic cables between the power interface board and the MVE are
firmly connected.
• Check each output phase of the soft starter for power circuit continuity.
This trip is not adjustable.
The motor is not connected correctly to the soft starter.
• Check individual motor connections to the soft starter for power circuit continuity.
Check connections at the motor terminal box.
•
This trip is not adjustable.
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 or start duration
Excessive current
•
• Damage to the motor windings
Resolve the cause of the overload and allow the motor to cool.
Related parameters: 1A, 1B, 1E, 1F, 4A, 6J
This is a name selected for a programmable input. Refer to Input A trip.
This is a name selected for a programmable input. Refer to Input A trip.
The motor thermistor input has been enabled and:
• The resistance at the thermistor input has exceeded 3.6 kΩ 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.
•
If thermistors have previously been connected to the MVE but are no longer required, use
the Thermistor Reset function to disable the thermistor.
Related parameters: 6Q
There is a network communication problem, or the network master may have sent a trip
command to the starter. Check the network for causes of communication inactivity.
Related parameters: 6M
This is a name selected for a programmable input. Refer to Input A trip.
There has been a voltage surge on the mains. Causes can include problems with a
transformer tap regulator or off-loading of a large transformer load.
Related parameters: 5I, 5J, 6G
The phase sequence on the soft starter's input terminals (L1, L2, L3) is not valid.
Check the phase sequence on L1, L2, L3 and ensure the setting in parameter 4G is suitable
for the installation.
Related parameters: 4G, 6P