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- acoustic signal.
The acoustic signal sounds intermittently with pauses of approx. 2 seconds, in all conditions other than “NORMAL
OPERATION”, that is other than the condition in which only the two green LEDs, IN. and OUT., are on. The sound
is intermittent without pauses when the BATT. LED is flashing. The acoustic signal can be disabled via key 5, in
which case it will never sound. The sound also remains off when the system is deactivated by the AUTO-OFF
function. Its state can be seen in the basic menu; "5=ON" indicates that it is enabled and "5=OFF" that it is disabled.
It can be disabled via key 5 in all menus where this key does not have other functions, but can only be enabled in
the basic menu. The DISABLING IS STORED.
5.2 Signal
messages
In normal operating conditions, without special requests for information or insertion of commands through keys or
from the remote RS232 line, the LCD display shows some basic messages which are also referred to with the basic
menu or NORMAL menu names. Other information can be obtained, or commands inserted, by accessing
submenus by pressing keys 1 to 8 in specific sequences. A brief sound is made each time a key is pressed, while the
messages will only be changed when an enabled key is pressed. The function of the keys in the Normal menu is
shown by associated symbols, while in other submenus this is indicated explicitly by the message. The Normal
menu can be accessed by pressing the keys, and is automatically returned to approx. two minutes after the last key is
pressed`.
5.3 Alarm
messages
Below is a list of the alarm messages that are shown on the first line of the display panel.
INTERFERENCE ON BY-PASS LINE
Alarm present when there is interference on the by-pass line, such as voltage peaks or harmonic distortion, while the
voltage and frequency are correct. WARNING: in this case the inverter is not synchronized with the by-pass line; if
the by-pass is forced with disconnector SWMB, with the remote commands or from the panel, the load may undergo
a sudden variation in voltage.
MANUAL BY-PASS, SWMB-ON
The manual by-pass disconnector SWMB is closed, thus preventing the UPS from returning to normal operation.
The load is powered directly from the input and will remain unpowered if there is a mains failure.
WRONG VOLTAGE BY-PASS or SWBY, FSCR OFF
The SENTRY MPS-HP does not recognize the by-pass line because it is outside the acceptance field or because
disconnector SWBY is open,
WRONG POWER SUPPLY VOLTAGE or SWIN OFF
The power supply voltage is not correct, the load is powered with the energy stored by the battery. This alarm is
present if one of the following conditions occurs:
-
the supply voltage or frequency of the rectifier power supply line is not within the acceptance field (see
characteristics)
-
SWIN is open,
- rectifier fault,
PRE-ALARM, LOW VOLTAGE ON BATTERY
Alarm present if the residual backup time is lower than the time set for the pre-alarm (the factory-set value is 5
minutes).
