Test Fanuc High Voltage Power Supply Module

Alpha Power Supply Module Test: High Voltage

To make an Alpha Power Supply Module (regular voltage) show “_ _” on the display and 600 volts DC output across the buss:

Step 1

Kill power, let the charge lights go out, and then check for a DIRECT SHORT between the top and bottom buss bars.

Step 2

If you have a DIRECT SHORT, disconnect modules until the short goes away.

Step 3

If you do not have a DIRECT SHORT, follow the steps below.

Step 4

Be sure to measure the leg-to-leg AND leg-to-ground voltage into the power supply module.

If you do not have a DIRECT SHORT:

Step 1

Supply 3-phase input into L1, L2, and L3 bottom of power supply (400-480V AC leg-to-leg & 200-260V AC leg-to-ground).

Step 2

Supply 200 volts input into CX1A connector.

Step 3

Jumper out the top and bottom pins of the three pins on the CX3/MCC cable coming into the PSM.

Step 4

Jumper out the top two pins of the three pins on the CX4/ESP E-Stop connector on the PSM.

Step 5

Have all screws on the DC buss installed and tight.

With these things done you should have “_ _” on the display and 600 volts dc across the buss. If you do not, then replace power supply.

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