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Control Card
Installation Guide
2 Replacing the Control Card
2.1 Disassembly and Replacement
Follow the instructions in the VLT® HVAC Basic Drive FC 101 Service Manual to disassemble the drive and replace the control card.
2.2 Software Compatibility
After repairing or upgrading hardware, it is important to ensure that the entire product runs on the latest released firmware. Down-
load the latest product firmware using VLT® Motion Control Tool MCT 10.
Table 3: Available Firmware Versions
Hardware version
Control card H3, H4, and H5
Control card H6
On units produced up until week 33, 2017, fan speed control is not available and the fan runs continuously at full speed.
1
61.xx update is required for 18.5–22 kW
2
When downloading the latest firmware, follow the firmware update procedure in the VLT® Motion Control Tool MCT 10 Operating
Guide. MCT 10 can be downloaded from
An internal fault, Alarm 38, occurs if a firmware update is required. Use the normal MCT 10 firmware update to resolve this error.
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vlt-drives.danfoss.com
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This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already
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2 | Danfoss A/S © 2021.05
www.danfoss.com
in the Service and support/Downloads section.
N O T I C E
*130R1211*
*M0032601*
Replacing the Control Card
Firmware version
2.xx
(1)(2)
61.xx
(1)
AN376926352883en-000101 / 130R1211
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