5–19Part Replacement Procedures
Publication 1336 IMPACT-6.8 – November, 2002
!
ATTENTION: Disconnect and lock out power from
the drive before disassembling the drive. Failure to
disconnect power may result in death or serious injury.
Verify zero bus voltage by measuring the voltage
between the Negative Capacitor Bus and both ends of
all three bus fuses. An open fuse does not show voltage
across both ends of the fuse. Failure to measure voltage
at both ends of the fuses may result in death or serious
injury. Refer to Figure 3.5. Do not attempt to service the
drive until the bus voltage has discharged to zero volts.
Important: Before you remove connections and wires from the
drive components, mark the connections and wires to
correspond with their component connections and
terminals to prevent incorrect wiring during assembly.
1. Perform the following procedures in Chapter 3, Access
Procedures.
• Opening the Drive Enclosure
• Removing the Control Board Mounting Plate
• Removing the Precharge Board Mounting Frame
• Pulling the Inverter Assembly
2. Remove the Snubber Resistor connections from the Snubber
Board, J1 and J2.
3. Remove the screws fastening the Power Module Snubber Board
to the Snubber Bus Bars.
Installation
!
ATTENTION: Do not substitute longer or shorter
hardware when fastening the Power Module
components to the Power Modules. Use the same size
fastener to fasten the components as was originally
used. Using different fastener lengths will damage the
Power Modules.
Install the Power Module Snubber Board in reverse order of
removal. Refer to Table 3.A – Fastener Torque Specifications in
Chapter 3, Access Procedures.
!
ATTENTION: Replace all guards before applying
power to the drive. Failure to replace guards may result
in death or serious injury.
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