INFOSEC UPS SYSTEM E4 LCD 10K TT User Manual page 72

09: Maximum battery discharge time setting
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Interface
10: Reserved
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Interface
11: Reserved
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Interface
12: Neutral loss detection
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Interface
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Setting
Parameter 3:
000~999: Set the maximum discharge time from 0 min to 999 min.
UPS will shut down to protect battery if the discharge time arrives
before the battery is under voltage. The default value is 990 min.
DIS: Disable battery discharge protection and backup time will depend
on battery capacity.
Setting
Reserved for future options.
Setting
Reserved for future options.
Setting
Parameter 2:
N.L: Indicates neutral loss detection function.
Parameter 3:
DIS: Disable the neutral loss detection function. The UPS will not detect
the neutral loss or not.
ATO: The UPS will automatically detect the neutral is lost or not. If
neutral loss is detected, an alarm will be generated. If the UPS is turned
on, it will transfer to battery mode. When neutral is restored and
detected, the alarm will be muted automatically and the UPS will go
back to normal mode automatically.
CHE: The UPS will automatically detect the neutral loss. If neutral loss
is detected, an alarm will be generated. If the UPS is turned on, it will
transfer to battery mode. When neutral is restored, the alarm will NOT
be muted automatically and the UPS will NOT go back to normal mode
automatically.
Here, you must mute the alarm and make the UPS go back to normal
mode manually. The operation is: Firstly, enter this menu and press the
"Enter" key to make the "CHE" flash. Secondly, press the "Enter" key
again to activate the neutral detection (check). If neutral is detected,
the alarm will be muted and the UPS will go back to normal mode. If
neutral is not detected, the UPS will continue alarming and stay on the
latest status until the neutral is detected well at next manual checking
operation.
CHE is default setting.