• Topic ID: id_12374422
  • Version: 1.2
  • Date: Jul 5, 2019 10:03:33 PM

Scan Room Power Supply Troubleshooting

This procedure describes how to troubleshoot issues with the Scan Room Power Supply (SRPS), GE P/N 5231801. See Table 1.

Notice Image
  • notice
  • Do not remove or insert the Control Board when the SRPS is powered On. Turn the SRPS input breaker Off before removing the Control Board.
Table 1 Process to Troubleshoot SRPS
Symptom Cause Solution
All 3 green phase indicators are Off on the Front Panel. See Figure 1.

Both green and yellow LEDs are Off on the Phase Relay. See Figure 2.

  1. Input AC voltage is <LSL limit of 176 VAC line to line, or 101.6 VAC line to Neutral.

  2. Input power phase(s) missing or not connected.

  3. Knob setting on Relay is not at 160 V per 5231801ADW.

  1. Ensure input voltage applied is within limits: 208 VAC +10% and -15%.

  2. Connect input phases.

  3. Set knob on Relay to 160 V. See Figure 3.
All 3 green phase indicators are Off on the Front Panel. See Figure 1.

Green LED is On and yellow LED is Off on the Phase Relay. See Figure 2.

 Power input phases are swapped (not sequenced properly with respect to SRPS). Swap input phases at the PEN Cabinet, one at a time until both green and yellow LEDs on Phase Relay are On.

SRPS is not powered, but all LEDs are On (both Phase Relay LEDs and 3 green phase indicators on Front Panel). See Figure 1 and Figure 2.

  1. Neutral is disconnected.

  2. May be a cabling swapping issue, but it is likely external cabling to the PEN Cabinet.

  3. Shunt connector is missing from J3 of PDB in slot 12 of RF Hub.

 A confidence loop exists in all SRPS output power cables that, if opened, will set the SRPS power supply outputs to zero volts.

  1. Check the connections at J1 and J2 and make sure that the neutral connection at the PDU in the PGR cabinet is secure. Refer to the PDU wiring diagram in 2233500.pdf.

  2. Check external cable connecting to J51, J52, and J46 at rear of SRPS.

    Check external power cable connections from SRPS to PEN panel and PEN panel to components in Rear Pedestal and Magnet.

  3. Locate P/N 5183786 Shunt Connector, and install on J3 of PDB inside RF Hub.

See the following illustrations for location of LEDs and Phase Relay.

Figure 1. Location of Three Green Indicators

Figure 2. Location of Green and Yellow LEDs and Control Board

Figure 3. Setting for 160 V