Komatsu 830E-AC Shop Manual page 465

PHASE MODULE REPLACEMENT
Phase Module Removal
1. Place the control power switch in the OFF
position and the GF cutout switch in the CUTOUT
position.
2. Use a VOM to ensure that there is no voltage
present between the (+) and (-) DC links and
ground.
3. Disconnect the fiber optic cables and the round
plug at the top of the phase module. Tuck the
removed cables under the loom to protect the
cables when the module is pulled out.
4. Remove the mounting hardware that secures the
phase module to the vertical bus bar. Note the
length of the bolts for proper reinstallation.
5. Remove the mounting hardware that secures the
two fuses.
6. Mark each phase module so that it will be
reinstalled in its original location.
NOTE: Each phase module weighs 29.5 kg (65 lbs).
7. Support the phase module and remove the two
nuts and washers that secure the phase module
to the control cabinet.
8. Slide the phase module forward by the extended
mounting arms and remove it from the control
cabinet. Do not pull on the gate card cover.
E03018 10/06
Phase Module Installation
NOTE: For removal of other control cabinet
components, refer to the GE service manual.
AC Drive System Electrical Checkout Procedure
(Release 21 Software)
1. Inspect the rear cooling air sealing gasket.
Replace it if damaged.
2. Return the phase module to its original location.
3. Install the two mounting bolts and washers that
secure the phase module to the control cabinet.
Tighten the bolts to 64 N•m (47 ft lbs).
4. Install the mounting hardware that secures the
two fuses. Tighten the bolts to 19 N•m (14 ft lbs).
5. Install the mounting hardware that secures the
phase module to the vertical bus bar. Tighten the
bolts to 26 N•m (19 ft lbs).
6. Reconnect the fiber optic cables and the round
plug at the top of the phase module.
7. Place the GF cutout switch in the NORMAL
position and the control power switch in the ON
position.
E3-35