UPS Start-Up & Shut Down
24
Linear Plus Series UPS User Instruction Manual
6. Press “OK” to switch off the inverter.
7. The display reads: “UPS Bypass Output” and Bypass LED is illuminated.
8. Remove the safety cover from the Maintenance Bypass Switch and switch from “UPS” to “Bypass.”
ATTENTION:
At this point the critical load is no longer protected by battery backup during interruptions and
disturbances on the mains supply.
9. Open both input circuit breakers (Main 1 and Bypass).
10. The UPS is now switched off, all LEDs are extinguished and the load is supplied directly from the mains
supply via bypass.
Return from
Maintenance
Bypass Procedure
1. Ensure all switches and circuit breakers upstream of the UPS are closed.
2. Close both input circuit breakers (Main 1 and Bypass).
3. Wait for at least 30 seconds until the output voltage has stabilized (yellow “Bypass” LED illuminated).
The display reads: “UPS: Bypass.”
4. Switch the Maintenance bypass switch from “Bypass” to “UPS” and replace the cover.
5. Press the “MENU” button.
6. Select submenu “Control.”
7. Press “OK.”
8. Select submenu “Turn UPS ON/OFF.”
9. Press “OK.” The control panel displays “Turn UPS to ONLINE.”
10. Press “OK” to switch on the inverter. The green “ON” LED is illuminated. The UPS is now in ONLINE
operation.
Emergency Switch
Device (ESD)/
Remote Power Off
(RPO) Function
For reasons of safety, a device having the characteristics of an Emergency Off button must be installed
externally of the UPS. This UPS is equipped with separate terminals for connecting hardwired customer
protection ESD relays.
These external terminals, labeled “RPO,” are located next to the 9 pin SUB-D (interface COM3) connector on
the upper back section of the unit, see Figure 9.
If the circuit between the two RPO connector pins is “opened,” the output of the UPS is immediately switched
off. To restart the UPS, the procedures outlined in the “UPS Start-Up Procedure” on page 23 must be followed.
The RPO circuit may be extended by connecting normally closed switches in series between the RPO
connector pins. Activating (opening) any of the series switches will cause the UPS to shut off its output.
Functional Test
To test readiness of the UPS, a functional test can be performed.
ATTENTION:
Supply to the load is not guaranteed during this test. It should not be carried out if a critical
load is connected to the UPS.
Simulate a mains failure by interrupting the mains supply to the UPS. If the UPS is operating correctly and the
batteries are fully charged, the following will occur:
• An acoustic signal at intervals of 4 seconds will be heard
• The “ON” LED indication will be extinguished
• The “BATT” LED will be lit.
Once the interval between the acoustic signals has decreased to 1 second, the UPS will continue to supply
energy via the batteries for a maximum of 3 more minutes, after which it will automatically switch off.
The load will be supplied from the batteries during the specified emergency supply period. If this does not
occur, see “Troubleshooting” on page 29.
If the test is successful, restore the UPS mains supply. The UPS is ready for operation.
NOTE:
The batteries must be recharged before the complete emergency supply period is again available.
