Danfoss VLT MCD 600 Operating Manual page 126

Operating Guide | VLT® Soft Starter MCD 600
12.2.8 Excess Start Time
Cause
Parameter 1-2 Motor Full Load Current is not appropriate for the motor.
•
• Parameter 2-4 Current Limit has been set too low.
• Parameter 2-2 Start Ramp Time has been set greater than the setting for parameter 5-15 Excess Start Time.
• Parameter 2-2 Start Ramp Time is set too short for a high inertia load when using adaptive control.
Troubleshooting
• Parameter 1-2 Motor Full Load Current.
• Parameter 2-2 Start Ramp Time.
• Parameter 2-4 Current Limit.
• Parameter 3-4 Start Ramp Time-2.
• Parameter 3-6 Current Limit-2.
12.2.9 Firing Fail Px
Cause
Where X is phase 1, 2, or 3. The SCR did not fire as expected.
Troubleshooting
• Check for faulty SCRs and internal wiring faults.
• There are no parameters related to this trip message.
12.2.10 FLC Too High
Cause
If the soft starter is connected to the motor using inside delta configuration, the soft starter may not be correctly detecting the
connection.
Troubleshooting
• Set parameter 20-6 Motor Connection to the connection used for the motor (in-line or inside delta). If the failure remains, contact the
local supplier for advice.
• See also parameter 20-6 Motor Connection.
12.2.11 Flow Sensor
Cause
The smart card has detected a fault with the flow sensor.
Troubleshooting
• Check the following parameters:
- Parameter 30-5 Flow Sensor Type.
- Parameter 36-2 Flow Sensor.
126 | Danfoss A/S © 2018.10
Troubleshooting
AQ262141844215en-000202 / 175R1174