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A phase loss on mains terminals L1, L2, or L3 during Run mode.
An SCR that has failed open circuit. A failed SCR can only be diagnosed accurately by replacing the SCR and checking the soft
starter performance.
Troubleshooting
Check the following parameters:
Parameter 5-1 Current Imbalance.
Parameter 5-2 Current Imbalance Delay.
Parameter 6-3 Current Imbalance.
11.2.6 Current Read Err Lx (Where X is 1, 2, or 3)
Cause
Internal fault (PCB fault). The output from the current transformer circuit is not close enough to 0 when the SCRs are turned off.
Troubleshooting
Contact the local Danfoss supplier for advice.
There are no related parameters to this trip message.
11.2.7 Depth Sensor
Cause
The smart card has detected a fault with the depth sensor.
Troubleshooting
Check the following parameters:
Parameter 30-12 Depth Sensor Type.
Parameter 36-3 Depth Sensor.
11.2.8 EEPROM Fail
Cause
An error occurred loading data from the EEPROM to RAM when the LCP powered up.
Troubleshooting
If the problem persists, contact the local distributor.
There are no parameters related to this trip message.
11.2.9 Excess Start Time
Cause
Excess start time trip can occur under the following conditions:
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.
11.2.10 Firing Fail Px (Where X is phase 1, 2, or 3)
Cause
The SCR did not fire as expected.
AQ262141844215en-000401 / 175R1174 | 119Danfoss A/S © 2020.12
Troubleshooting
VLT® Soft Starter MCD 600
Operating Guide
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