Danfoss VLT MCD 600 Operating Manual page 125

VLT® Soft Starter MCD 600
Operating Guide
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Parameter 40-1 .
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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:
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Parameter 30-5 Flow Sensor Type.
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Parameter 30-7 Flow at 4 mA.
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Parameter 30-8 Flow at 20 mA.
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Parameter 31-1 High Flow Trip Level.
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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:
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Parameter 30-1 Pressure Sensor Type.
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Parameter 30-3 Pressure at 4 mA.
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Parameter 30-4 Pressure at 20 mA.
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Parameter 32-1 High Pressure Trip Level.
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Parameter 32-2 High Pressure Start Delay.
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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.
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Troubleshooting
AQ262141844215en-000401 / 175R1174 | 121