5–14 Part 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.
2. Release the two 1/4-turn latches on the Precharge Board
Mounting Frame.
3. Swing Precharge Board Mounting Frame away from drive.
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.
4. Remove the cables from the power supply.
5. Remove the four screws fastening the Power Supply to the
Precharge Board Mounting Frame.
Installation
1. Install the Power Supply in reverse order of removal.
2. Make sure that the high voltage bus and the 120 volt power
supply are both de-energized.
!
ATTENTION: A hazard of personal injury does exist.
Depending on your system, the 120V
separately-supplied power source may not be
de-energized when you de-energize the high voltage
bus. Make sure that both sources of power are
completely de-energized.
3. Adjust voltage to 16 Volts. Refer to Figure 5.8.
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