Danfoss VLT MCD 600 User Manual

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Parameter 40-1 .
Parameter 40-2 .
Parameter 40-3 .
Parameter 40-4.
Parameter 40-5.
11.2.16 Heat Sink Overtemperature
Troubleshooting
Check that bypass contactors are operating.
Check that cooling fans are operating (if fitted).
If mounted in an enclosure, check if ventilation is adequate.
Mount the VLT® Soft Starter MCD 600 vertically.
There are no parameters related to this trip message.
Check that the internal bypass contactors are operating. Use the run simulation to operate the soft starter and measure resist-
ance across each controlled phase. Resistance should be >0.2 MΩ when the bypass contactor is open and <0.2 Ω when the
bypass contactor is closed.
Measure the voltage across 1/L1-2/T1, 3/L2-4/T2, 5/L3-6/T3 while the soft starter is running. If the bypass contactor has closed,
the voltage should be ≤0.5 V AC. If the bypass contactor does not close, the voltage should be approximately 2 V AC.
Check that the cooling fans are operating (models MCD6-0042B~MCD6-0579B).
11.2.17 High Flow
Cause
The flow sensor connected to the smart card has activated high-flow protection.
Troubleshooting
Check the following parameters:
Parameter 30-5 Flow Sensor Type.
Parameter 30-7 Flow at 4 mA.
Parameter 30-8 Flow at 20 mA.
Parameter 31-1 High Flow Trip Level.
Parameter 31-3 Flow Start Delay.
Parameter 31-4 Flow Response Delay.
Parameter 36-6 High Flow.
11.2.18 High Pressure
Cause
The pressure sensor connected to the smart card has activated high-pressure protection.
Troubleshooting
Check the following parameters:
Parameter 30-1 Pressure Sensor Type.
Parameter 30-3 Pressure at 4 mA.
Parameter 30-4 Pressure at 20 mA.
Parameter 32-1 High Pressure Trip Level.
Parameter 32-2 High Pressure Start Delay.
Parameter 32-3 High Pressure Response Delay.
Parameter 36-4 High Pressure.
11.2.19 Input A Trip/Input B Trip
Cause
The programmable input is set to a trip function and has activated.
AQ262141844215en-000401 / 175R1174 | 121Danfoss 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