AB Quality PowerFlex 400 Frames D-H Сервисный бюллетень - Страница 4

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PowerFlex 400 Frames D-H Replacement Procedure for Main Control Board

Removing and Locking Out

Power

Opening the Drive

Publication 22C-SB003A-EN-P – August 2008

If the drive is in service, do the following.

1. Turn off and lock out all incoming power to the drive. Wait five minutes.

2. Verify that there is no voltage at the input power terminals.

ATTENTION: To avoid an electric shock hazard, verify that the

voltage on the bus capacitors has discharged before performing

any work on the drive. Wait five minutes for the capacitors to

discharge. Then, measure the DC bus voltage at the DC- and

DC+ terminals or at the DC- and P2 terminals on the power

terminal block. The voltage must be zero.

A darkened LCD display and LEDs are not an indication that

capacitors have discharged to safe voltage levels.

Frame D Drives

1. Loosen the two captive cover screws.

2. Pull the bottom of the cover out and up to release.