Danfoss VLT FC Series User manual

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1 Overview
1.1 Description
D1h–D8h drives have 3 IGBT modules. If the brake option is present, the drive also includes a brake IGBT module. This IGBT module
replacement kit contains all components required to install 1 replacement IGBT module or 1 brake IGBT module.
NOTICE
SPARE PARTS COMPATIBILITY
recommends replacement of all IGBT modules or all brake IGBT modules, when 1 or more modules fail.
For best results, replace modules with parts from the same lot number.
1.2 Kit Numbers
Use these instructions with the following kits.
Table 1: Numbers for IGBT Module Replacement Kits
Kit number
Kit description
176F3362
IGBT dual module 300 A 1200 V T4/T5 drive
176F3363
IGBT dual module 450 A 1200 V T2/T4/T5 drive
176F3364
IGBT dual module 600 A 1200 V T2/T4/T5 drive
176F3365
IGBT dual module 900 A 1200 V T2/T4/T5 drive
176F3366
IGBT brake module 450 A 1700 V
176F3367
IGBT brake module 650 A 1700 V
176F3422
IGBT dual module 300 A 1700 V T7 drive
176F3423
IGBT dual module 450 A 1700 V T7 drive
176F3424
IGBT dual module 450 A 1700 V T7 drive PP2
176F3425
IGBT dual module 650 A 1700 V T7 drive PP2
1.3 Items Supplied
The following parts are contained in the kit.
1 IGBT module
Syringe of thermal grease
Hardware for busbar mounting
Fasteners
AN341428219214en-000201 / 130R0383 | 1Danfoss A/S © 2023.10
Installation Guide
IGBT Module Replacement for D1h–D8h Drives
VLT® FC Series FC 102, FC 103, FC 202, and FC 302
176F4242 IGBT dual module 450 A 1200 V T4/T5 drive

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2 Installation
2.1 Safety Information
NOTICE
QUALIFIED PERSONNEL
Only qualified personnel are allowed to install the parts described in these installation instructions.
Disassembly and reassembly of the drive must be done in accordance with the corresponding service guide.
WARNING
ELECTRICAL SHOCK HAZARD
VLT® FC series drives contain dangerous voltages when connected to mains voltage. Improper installation, and installing or serv-
icing with power connected, can cause death, serious injury, or equipment failure.
Only use qualified electricians for the installation.
Disconnect the drive from all power sources before installation or service.
Treat the drive as live whenever the mains voltage is connected.
Follow the guidelines in these instructions and local electrical safety regulations.
WARNING
DISCHARGE TIME (20 MINUTES)
The drive contains DC-link capacitors, which can remain charged even when the drive is not powered. High voltage can be
present even when the warning indicator lights are off.
Failure to wait 20 minutes after power has been removed before performing service or repair work can result in death or serious
injury.
Stop the motor.
Disconnect AC mains, permanent magnet type motors, and remote DC-link supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
Wait 20 minutes for the capacitors to discharge fully before performing any service or repair work.
Measure the voltage level to verify full discharge.
NOTICE
ELECTROSTATIC DISCHARGE
Electrostatic discharge can damage components.
Ensure discharge before touching internal drive components, for example by touching a grounded, conductive surface or by
wearing a grounded armband.
AN341428219214en-000201 / 130R03832 | Danfoss A/S © 2023.10
Installation
IGBT Module Replacement for D1h–D8h Drives
Installation Guide

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2.2 Installing the IGBT Module
NOTICE
THERMAL INTERFACE
A proper thermal interface is required between the IGBT module and heat sink. Failure to follow these instructions results in a
poor thermal bond and causes premature IGBT failure.
Ensure that the environment is free of airborne dust and contaminants while applying the thermal grease.
NOTICE
HEAT SINK DAMAGE
A damaged heat sink can cause a drive to malfunction. A clean, undamaged mounting surface allows proper thermal dissipation.
Take care not to scratch or damage the heat sink when cleaning and servicing the drive.
Refer to the service guide for IGBT disassembly procedures. To install replacement IGBT modules, use the following steps.
Clean the heat sink using a cloth and solvent or isopropyl alcohol to remove debris and remaining thermal grease.
To ensure that the thermal grease is not expired, check the expiration date on the packaging. If expired, order a new
syringe of thermal grease (p/n 177G5463).
With the syringe, apply a layer of thermal grease to the bottom of the IGBT module in the pattern shown in Illustration 1.
It is not required to use the whole syringe, but excess thermal grease is not a problem.
e30bi161.10
1
2
Illustration 1: IGBT Thermal Grease Pattern
1
Bottom surface of IGBT module
2
Thermal grease
Place the IGBT module on the heat sink, and twist it back and forth to spread the thermal grease evenly on the IGBT and
the heat sink surface.
Align the mounting holes in the IGBT module with the holes in the heat sink.
Insert the mounting screws and hand tighten them. The IGBT module requires either 4 or 10 screws to fasten it to the
heat sink.
Using a manual torque wrench to avoid over torquing the screw, follow the fastener tightening sequence shown in
Illustration 2. Slowly tighten (maximum 20 RPM) all screws to 50% of the torque values listed in Table 2.
Repeat the same tightening sequence and slowly tighten (maximum 5 RPM) all screws to 100% of the torque value.
AN341428219214en-000201 / 130R0383 | 3Danfoss A/S © 2023.10
Installation
IGBT Module Replacement for D1h–D8h Drives
Installation Guide

9. Tighten the busbar connection terminals to the torque value listed in Table 2.
e30bh875.10
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2
3
4
1
2
3
6
7
10
5
4
9
8
A
B
Illustration 2: IGBT Fastener Tightening Sequence
Table 2: Torque Tightening Values and Sequence
Kit number
Mounting torque [Nm
(in-lb)]
Busbar connection torque
[Nm (in-lb)]
Diagram
Screw tightening order
176F3362
3.3 (29)
4.0 (35)
A
1-2-3-4
176F3363
3.3 (29)
4.0 (35)
A
1-2-3-4
176F3364
3.5 (31)
9.0 (80)
B
1-2-3-4-5-6-7-8-9-10
176F3365
3.5 (31)
9.0 (80)
B
1-2-3-4-5-6-7-8-9-10
176F3366
3.3 (29)
4.0 (35)
A
1-2-3-4
176F3367
3.5 (31)
9.0 (80)
B
1-2-3-4-5-6-7-8-9-10
176F3422
3.3 (29)
4.0 (35)
A
1-2-3-4
AN341428219214en-000201 / 130R03834 | Danfoss A/S © 2023.10
Installation
IGBT Module Replacement for D1h–D8h Drives
Installation Guide

Kit number
Mounting torque
[Nm (in-lb)]
Busbar connection torque
[Nm (in-lb)]
Diagram
Screw tightening order
176F3423
3.3 (29)
4.0 (35)
A
1-2-3-4
176F3424
3.5 (31)
9.0 (80)
B
1-2-3-4-5-6-7-8-9-10
176F3425
3.5 (31)
9.0 (80)
B
1-2-3-4-5-6-7-8-9-10
AN341428219214en-000201 / 130R0383 | 5Danfoss A/S © 2023.10
Installation
IGBT Module Replacement for D1h–D8h Drives
Installation Guide
A1-2-3-4
176F4242 3.3 (29) 4.0 (35)

*130R0383*
*M0023501*AN341428219214en-000201 / 130R0383 | 6
Danfoss A/S © 2023.10
Installation
IGBT Module Replacement for D1h–D8h Drives
Installation Guide
Danfoss A/S
Ulsnaes 1
DK-6300 Graasten
drives.danfoss.com
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