Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 383)

Component Definition and Maintenance 6-39
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
Connection Stabs
M8 Bolt to be removed
Support Bracket
Figure 6.31 – Chill Block Removal and Replacement
Instructions for inserting Chill Block assembly
1. Ensure all power is disconnected.
2. Slowly push the Chill block assembly into the PowerCage. Ensure
that the stabs are aligned with their connectors at the back of the
PowerCage. This is difficult to see. When the stabs are properly
aligned and in place, the chill block assembly will be seated squarely
and the support bracket should be resting on the PowerCage base
when positioned correctly.
Note: If the stabs are not seated properly in the brackets, damage can
occur. Measure the snubber resistance and sharing resistance to
ensure that contact has been made. If rear access to the drive is
available, remove backplates and visually verify.
3. When sure that the chill block stabs are properly positioned replace
the M8 and M10 bolts and tighten. Magnetized sockets are
recommended with 40 cm extensions.
4. Re-connect the coolant system to the chill blocks. Reconnecting the
coolant system before re-installing the SCR/SGCTs ensures no
coolant is spilled on the devices or circuit boards.
5. Replace SCR/SGCT and circuit boards explained in “SGCT
Replacement Procedure” and “Replacing the Silicon Controlled
Rectifier”.
6. Readjust the clamping load as described in “Checking Clamping
Pressure”.