Danfoss VLT FC Series, Service Manual

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9.2.2 Split Bus Power Supply and
Parallel Drive Modules
NOTICE
LOAD CONDITIONS
Use the following procedures for parallel drive module
testing with split bus or no load conditions. Do not use
these procedures under load conditions. Using the
procedures for load conditions can lead to parallel drive
module failure.
After isolating the failed parallel drive module from the
parallel system, use the following procedures to run the
parallel drive module as a standalone unit.
Running a parallel drive module (with replaced power
card)
For parallel drive modules with a failed power card, use
the following procedure to run the module in standalone
mode. If the power card has not failed, skip to the next
procedure.
1. Place the new power card in the drive module
and ensure that all screws are tightened properly.
2. Connect the 44-pin ribbon cable from the MDCIC
in the service kit to the connector on the top of
the module.
3. Attach the current scaling card to the MK101
connector on the service kit MDCIC. (See
chapter 15.1.3 Recommended Current Scaling Cards
for current scaling card part numbers.)
4. Connect the current scaling card to master drive
slot (inverter1) on MDCIC.
5. Unplug the DC link connector (MK902) from the
power card of the drive module.
6. Connect the 650 V DC connector from the split
bus power supply to the split bus connector
(MK901) of the power card.
7. Connect the DC bus supply cable from the split
bus power supply (24 V DC) to the DC link
connector (MK902).
8. Apply power to the split bus power supply.
9. Check the display on the LCP. Alarm 250, New
spare part appears.
10. Enter the appropriate type code for the module
as listed in
Table 9.1 .
11. Save the setting to EEPROM.
12. Power cycle the drive module. The module is
initialized in standalone mode and is ready for
testing as described in
chapter 8 Test Procedures .
Running a parallel drive module in standalone mode
After isolating the failed parallel drive module from the
parallel system, use the following procedure to run the
parallel drive module as a standalone unit. If the unit has a
failed power card, use the previous procedure.
1. Connect the 44-pin ribbon cable from the MDCIC
in the service kit to the connector on the top of
the module.
2. Attach the current scaling card to the MK101
connector on the service kit MDCIC. (See
chapter 15.1.3 Recommended Current Scaling Cards
for current scaling card part numbers.)
3. Connect the current scaling card to master drive
slot (inverter1) on MDCIC.
4. Unplug the DC link connector (MK902) from the
power card of the drive module.
5. Connect the 650 V DC connector from the split
bus supply to the split bus connector (MK901) of
the power card.
6. Connect the DC bus supply cable from the split
bus supply (24 V DC) to the DC link connector
(MK902).
7. Apply power to the split bus supply.
8. Check the display on the LCP. Alarm 70, Illegal FC
config or Warning 76, Power unit setup appears.
9. Enter the appropriate type code for the module
as listed in
Table 9.1 .
10. Save the setting to EEPROM.
11. Power cycle the drive module. The module is
initialized in standalone mode, and is ready for
testing as described in
chapter 8 Test Procedures .
Module Type code
N250T5 FC-302N250T5E00H2BGXXXX
N200T5 FC-302N200T5E00H2BGXXXX
N160T5 FC-302N160T5E00H2BGXXXX
N315T7 FC-302N315T7E00H2BGXXXX
N250T7 FC-302N250T7E00H2BGXXXX
N200T7 FC-302N200T7E00H2BGXXXX
N160T7 FC-302N160T7E00H2BGXXXX
Table 9.1 Type Code Selection Table
Special Test Equipment
VLT
®
FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
124 Danfoss A/S © 02/2019 All rights reserved. MG94A502
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