Danfoss VLT FC 102 Operating Manual page 75

VLT HVAC Drive FC 102
Operating Guide
7.6.35 ALARM 39, Heat Sink Sensor
Cause
There is no feedback from the heat sink temperature sensor.
The signal from the IGBT thermal sensor is not available on the power card.
Troubleshooting
• Check the ribbon cable between the power card and the gate drive card.
• Check for a defective power card.
• Check for a defective gate drive card.
7.6.36 WARNING 40, Overload of Digital Output Terminal 27
Troubleshooting
• Check the load connected to terminal 27 or remove the short-circuit connection.
•
Check parameter 5-00 Digital I/O Mode and parameter 5-01 Terminal 27 Mode.
7.6.37 WARNING 41, Overload of Digital Output Terminal 29
Troubleshooting
• Check the load connected to terminal 29 or remove the short-circuit connection.
• Check parameter 5-00 Digital I/O Mode and parameter 5-02 Terminal 29 Mode.
7.6.38 WARNING 42, Ovrld X30/6-7
Troubleshooting
For terminal X30/6:
• Check the load connected to the terminal, or remove the short-circuit connection.
• Check parameter 5-32 Term X30/6 Digi out (MCB 101) (VLT® General Purpose I/O MCB 101).
For terminal X30/7:
• Check the load connected to the terminal, or remove the short-circuit connection.
•
Check parameter 5-33 Term X30/7 Digi Out (MCB 101) (VLT® General Purpose I/O MCB 101).
7.6.39 ALARM 43, Ext. Supply
Cause
VLT® Extended Relay Option MCB 113 is mounted without 24 V DC.
Troubleshooting
Choose 1 of the following:
• Connect a 24 V DC external supply.
• Specify that no external supply is used via parameter 14-80 Option Supplied by External 24VDC, [0] No. A change in parameter
14-80 Option Supplied by External 24VDC requires a power cycle.
7.6.40 ALARM 45, Earth Fault 2
Cause
Ground fault.
Troubleshooting
• Check for proper grounding and loose connections.
• Check for proper wire size.
• Check the motor cables for short circuits or leakage currents.
7.6.41 ALARM 46, Power Card Supply
Cause
The supply on the power card is out of range. Another reason can be a defective heat sink fan.
There are 3 supplies generated by the switch mode supply (SMPS) on the power card:
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Diagnostics and Troubleshooting
AQ267037536117en-000101 / 130R0083 | 75