SL3000 - New Install will not Initialize with AEMs

Asset ID:	1-72-1527189.1
Update Date:	2017-08-23
Keywords:

Solution Type Problem Resolution Sure

Solution 1527189.1 : SL3000 - New Install will not Initialize with AEMs

Applies to:

Sun StorageTek SL3000 Modular Library System - Version All Versions and later
Information in this document applies to any platform.

Symptoms

New Install will not Initialize with AEMs attached.

Site reported during an installation that neither AEM would come ready and the Tall-Bot would not move or start its initialization. (Only one Tall-Bot was installed as the other had not been put in yet.) Both AEMs were flashing red "7" (motor disable) on their PUX cards after a few minutes. The PUN card LEDs indicated that the SSDs were neither in the up nor down positions. Both PUN card LEDs for each AEM door position were off.

Changes

New Installation of AEMs

Cause

It was discovered that the doors had to be rolled up anther inch to make the "door up" sensors. Apparently the microcode prevented the Tall-Bot from moving due to not knowing where the SSDs (Service Safety Doors) were. The code did not try to find the "UP" sensor on the AEMs and did not attempt to move the doors in either direction.

Engineering confirms a packing error in manufacturing is the root cause of the problem.

The microcode is acting as designed. Moving the Service Safety Door is not permitted if its location is unknown.

Solution

"Why weren't the doors in the full up position?" The reason is the new U-shaped pieces of foam installed under both outer edges of the SSD door loop to prevent the slats of the door from separating in transit. With the foam installed it parks the door about an inch away from the door up sensor. Moving the doors to the maximum up position (lowest loop) fixed the problem and allowed the subsystem to initialize.

Action: After removing the 2 small foam blocks from each AEM, CAREFULLY rotate the door shaft and sprockets so the flexible door bottom loop contacts the "door up" switch before proceeding with the library installation.

SL3000 AEM Pic

One of the foam blocks installed in side tracks at the bottom of the door loop shown below:

Foam Block

Attachments

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