Map 152A: Loss Of Ac Power Or Phase Missing - IBM pSeries 670 Service Manual

Hide thumbs Also See for pSeries 670:

Table of Contents

MAP 152a: Loss of ac Power or Phase Missing

Press the Service complete button.

Is the error code that sent you to this MAP still reported?

This was a transient condition. The condition no longer exists. No service action is required.

Go to "Step 152a-2".

Check all LEDs on the BPA that is not referenced by the error code that sent you to this MAP.

Are they OK?

Defer this repair until the failure on the other BPA can be repaired. This ends the procedure.

Go to "Step 152a-3".

Note: Read the Danger and Caution notices under "Safety Notices" on page xi before continuing with this

Prepare a multimeter to measure up to 600 V ac.

2. Use the multimeter to measure the ac voltage at the following test points on the faceplate of the BPA

that is referenced by the error code that sent you to this MAP:

v Phase A and phase B

v Phase B and phase C

v Phase C and phase A

Are all the readings greater than 180 V ac?

Go to "Step 152a-4" on page 166.

Exchange the following FRUs one at a time:

1. BPR 1, that is connected to the BPA side referenced in the error code that brought you to this

MAP. Follow all steps in the removal and replacement procedures for "Bulk Power Regulator

(BPR)" on page 783.

2. BPR 2, that is connected to the BPA side referenced in the error code that brought you to this

MAP. Follow all steps in the removal and replacement procedures for "Bulk Power Regulator

(BPR)" on page 783.

3. BPR 3, that is connected to the BPA side referenced in the error code that brought you to this

MAP. Follow all steps in the removal and replacement procedures for "Bulk Power Regulator

(BPR)" on page 783.

4. BPC on the side referenced by the error code that sent you to this MAP. Follow all steps in the

removal and replacement procedures for "Bulk Power Controller (BPC)" on page 784.

5. BPE on the side referenced by the error code that sent you to this MAP. Follow all steps in the

removal and replacement procedures for "Bulk Power Enclosure (BPE)" on page 787.

Chapter 3. Maintenance Analysis Procedures

Table of Contents