Parker AC890 Product Manual page 251

Routine Maintenance and Repair
2. Disconnect 4-way op-station cable from LED PCB (see figure 10.1).
3. Remove drive front cover (metal) which is attached via 4 off ¼ turn fasteners (take care not to damage
PCBs beneath cover).
4. Remove DC+ and DC- bus bars at the top of the drive. - remove 2 M6 captive nuts at the capacitor
joining plate assembly and 2 M6 captive nuts at the external connection busbars. (300 mm long
extension recommend for this step).
5. Remove capacitor joining plate assembly via M6 captive washer nuts. Note that the nuts on the left hand
side of the M2 phase are covered with plastic insulating caps. These caps are a safety requirement and
must be fitted.
6. If removing the M3 phase limb from an drive which has a Brake unit fitted, it will be necessary to
remove the brake connecting plate. (Refer to Chapter 5).
7. Remove 2 M6 captive nuts from input busbar on phase limb to be replaced. (300 mm long extension
recommended for this step).
8. Remove 2 M6 hex bolts and washers from output busbar on phase limb to be replaced (300mm long
extension recommended for this step).
9. Disconnect cable(s) from printed circuit board on phase limb to be replaced. Take note of PCB
connectivity.
10. Disconnect earth wire on phase limb to be replaced by removing 1 off M5 captive nut at chassis.
11. Insert service plate underneath phase limb to be removed. Secure to side panels of drive using the two
M5 screws supplied.
12. 890 frame G : Remove heatsink clamp screws (3 per phase assembly) and remove clamp plates.
890 frames H & J : Loosen heatsink clamps (4 per phase assembly) and rotate through 90°.
13. Carefully remove phase limb assembly.
10-19
Page 890SD (Standalone) Drive: Frame G, H & J