GE Industrial Solutions On-line VH Series UPS - Manual (Page 16)

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GE_UPS_OPM_VHU_0K7_2K0_XUL_V040.docx Operating Manual VH Series 700 - 1000 -1500 – 2000 VA UL
4.2 START-UP
4.2.1 Start-up, mains available
Via front panel:
press keypad 'I' (1, fig. 4.1) briefly; LED ‘operation’ (already slowly blinking) will at first blink faster and after a few
seconds it will illuminate continuously, indicating that the unit has started up.
Via UPS monitoring software:
startup after delay, see 4.4.11 for more information. The equipment connected to the UPS can now be switched on.
The UPS will not start-up if "Phase Neutral reversal" indication is present (see section 4.4.12).
4.2.2 Start-up, mains not available
If the mains input is absent (power cord not connected, or mains failure):
Press keypad 'I' until the buzzer sounds. The LEDs ‘operation’ and ‘on battery’ will illuminate. The UPS operates on battery: it
discharges the batteries. See 4.4.4 for further details about this operating mode.
4.3 USE: NORMAL OPERATION
4.3.1 Normal operation conditions
 the mains supply is present,
 the UPS is on,
 the load does not exceed the capacity of the UPS and
 the operating temperature is below alarm level
4.3.2 No-load shutdown
If this function is activated, the UPS will switch off during a mains failure when the load is less than 5% of the maximum load.
In this way unnecessary discharging of the batteries is avoided. The unit will automatically turn on again when mains power
is restored. The default setting of the no-load shutdown function is: disabled.
The setting can be changed using the UPS monitoring software. For more information please refer to the manual that
came with the software.
If the no-load shutdown function is activated and the load is smaller than the 5% threshold, the ‘25%’ load LED will blink to
warn you that the unit will switch off during a mains failure.
4.3.3 Output frequency
At power up default enabled "Auto" frequency detection updates output frequency setting by comparing it with input
frequency. Only stable 50 or 60 Hz frequencies are valid, otherwise previous setting is kept (60 Hz at first start up). Setting
output frequency to 50 or 60 Hz with the UPS monitoring software disables the "Auto" frequency detection.
NOTE
The unit can be used as a frequency converter: the input frequency range is 45-66Hz, the output frequency is
selectable 50/60Hz. If the unit is used as a frequency converter, the bypass function is no longer available. As a
result an audible alarm will be generated continuously (see 4.4.6). To avoid this, we advise to disable the
bypass.
WARNING!
Changing of the output frequency can cause severe damage of equipment connected to the
appliance outputs of the UPS: Be sure that the new frequency is suitable for the connected equipment!
4.3.4 Switching off
Via operating panel:
Press keypad ‘0’ (2, fig. 4.1) for 1 second. If the UPS is switched off the output will always be absent for a few seconds
to ensure that the connected equipment is able to reboot.
Using UPS monitoring software:
Shutdown after delay.
If electric isolation is required, unplug the power cord from the wall outlet.