PowerWalker VFI 20000-40000TAP 3/3 BI, User Manual

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6.3.7 Transfer from Normal Mode to Internal Maintenance Bypass
To transfer the load to maintenance bypass:
1. On the UPS System Control screen, select the NORMAL BYPASS command, then press the RETURN
pushbutton.
2. Loosen the screws that fix the cover over the maintenance bypass switch. This action will signal the UPS
to transfer to static bypass. Refer to Figure 6-2 for switch arrangement.
3. Verify that the LCD/LED display indicates the UPS is in Bypass mode.
4. Close the Maintenance Bypass switch.
5. Open the Bypass Input and Output switches separately (Dual Input).
6. Open the Neutral switch.
• The Neutral Switch should remain closed unless operated by a service technician.
• Maintenance Bypass operate must be performed by an authorized Service Engineer.
NOTE
WARNING
Power is present inside the UPS cabinet.
6.3.8 Transfer from Internal Maintenance Bypass to Normal Mode
To transfer the load to Normal mode:
1. Close the Neutral switch, slide the cover plate right and tighten the screws.
2. Close the Input and Bypass input switches.
3. Command the UPS to run in Bypass mode via the Control panel.
4. Verify that the LCD/LED display indicates the UPS is in Bypass mode.
5. Close the Output switch.
6. Open the Maintenance Bypass switch, slide the cover plate left and tighten the screws.
7. Command the UPS to transfer to Normal mode via the control panel.