Critical Power
Modifications reserved
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GE_UPS_OPM_VHU_208_2K0_3K0_XUS_V010.docx
Operating Manual
VH2000-3000 208V UL
4.4.8
Overload
The demanded power exceeds the normal capacity of the UPS. The alarm occurs when the load is > 100%. If the load
exceeds 150% the UPS will immediately switch to bypass, assuming that the conditions for a transfer to bypass are fulfilled.
If an overload condition between 110-150% persists, the UPS will also switch to bypass operation.
During an overload the UPS may automatically switch off within a few minutes (load dependent) and output power is lost:
if a transfer to bypass is inhibited (see 4.4.7), or
if the bypass function has been disabled (see 4.5), or
if the UPS operates on battery (see 4.4.5).
To avoid these problems, be absolutely certain that the power demands of the protected equipment are within the limits of
the UPS.
4.4.9
Bad battery
Either the batteries are almost chemically worn out or the battery wiring, including the battery fuse, is faulty. If the batteries
are aged, they must be replaced as soon as possible to ensure full protection for your equipment. Perhaps the 'bad battery'
alarm occurs after a test which you started immediately after installation or after a power failure. In this case the alarm may
be incorrect as the batteries have been (partly) discharged during transport/storage or during a power failure. Allow the UPS
to recharge the batteries. See also 4.6.
4.4.10
General alarm
‘General alarm’ comprises a group of alarms; the buzzer behaviour indicates which alarm is active:
1 / 2 secs:
General fault
Overload (see 4.4.8)
Over temperature
Output out of tolerance
1 / 5 secs:
Charger failure
Bypass out of limits (see 4.4.7)
Bad battery (see 4.4.9)
4.4.11
Shutdown pending
The UPS monitoring software allows you to switch the UPS into standby mode after a programmable delay time. During
countdown the ‘operation’ LED will blink 2x per second and the buzzer will beep every 5 seconds.
4.4.12
Startup pending
The UPS monitoring software allows you to start up UPS after a programmable delay time. During this delay time the
‘operation’ LED will blink 2x per second.
4.4.13
P-N (Phase-Neutral) reversal
If the P-N reversal indication is enabled, the UPS will indicate whether the voltage between Neutral and Earth (Ground) at the
UPS input exceeds a certain voltage (i.e. Phase and Neutral at the UPS input are reversed in an earthed/grounded Neutral
system). In this potentially unsafe situation both LEDs ‘operation’ and ‘alarm’ will blink fast and the buzzer will sound.
Reversing the mains plug will prevent this unsafe situation and will cancel the alarm. In case of non-earthed/grounded
Neutral system this indication should be disabled.
The P-N reversal indication is
by default enabled
. Changing of the setting is described in section 4.5.
4.4.14
REPO (Remote Emergency Power Off)
The REPO function can be used to remotely shut down the UPS using the REPO connector provided at the rear side of the
UPS (9, fig. 3.3). See section 3.4.4 for installation instructions.
The REPO functionality is
by default disabled
and can be enabled by using the Configuration tool.
If a normally closed switch, connected to the REPO connector, is opened, the UPS will shut down. All LEDs on the front
panel will be on and the buzzer will beep 1x / 2 seconds.
After a REPO shutdown, restart the UPS as follows:
1. Close the switch connected to the REPO connector.
2. Press the “ON” switch briefly (1, fig. 4.1).
