Danfoss VLT MCD 600 User Manual

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11.2.29 Low Water
Cause
The depth sensor connected to the smart card has activated depth protection.
Troubleshooting
Check the following parameters:
Parameter 30-12 Depth Sensor Type.
Parameter 30-14 Depth at 4 mA.
Parameter 30-15 Depth at 20 mA.
Parameter 34-1 Depth Trip Level.
Parameter 34-2 Depth Reset Level.
Parameter 34-3 Depth Start Relay.
Parameter 36-9 Well Depth.
11.2.30 Motor Connection T1/T2/T3
Cause
This trip is not adjustable. The motor is not connected correctly to the soft starter.
Troubleshooting
Check individual motor connections to the soft starter for power circuit continuity.
Check connections at the motor terminal box.
If the soft starter is connected to a grounded delta mains supply, adjust parameter 20-6 Motor Connection to match the motor
connection configuration.
11.2.31 Motor Overload
Cause
The motor has reached its maximum thermal capacity. The following can cause overload:
The soft starter protection settings do not match the motor thermal capacity.
Excessive starts per hour or start duration.
Excessive current.
Damage to the motor windings.
Troubleshooting
Resolve the cause of the overload and allow the motor to cool.
Check the following parameters:
Parameter 1-2 Motor Full Load Current.
Parameter 1-4 Locked Rotor Time.
Parameter 1-5 Locked Rotor Current.
Parameter 1-6 Motor Service Factor.
Parameter 5-15 Excess Start Time.
Parameter 6-10 Excess Start Time.
N O T I C E
Parameters 1-4 to 1-6 determine the trip current for motor overload protection. The default settings of parameters 1-4 to 1-6 pro-
vide motor thermal protection Class 10, trip current 105% of FLA, or equivalent.
AQ262141844215en-000401 / 175R1174124 | Danfoss A/S © 2020.12
Troubleshooting
VLT® Soft Starter MCD 600
Operating Guide

Danfoss VLT MCD 600 Specifications

General

Brand	Danfoss
Model	VLT MCD 600
Category	Controller
Language	English