Characteristics
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(1) Overload protection
If the UPS output is overloaded by exceeding the current
capacity of the inverter, such as when a computer system
boots up, the output selector automatically switches the
source of AC power from the inverter to the bypass circuit,
without interruption.
After a certain period of time has elapsed, the source of power to the load is switched back to the inverter without
interruption (auto-return), as shown in §17.1(1).
* When “Overload Recovery Operation” in the user setting menu is set to “Bypass”, the UPS switches to inverter
power supply without interruption when the overload is resolved.
(2) UPS fault protection
If a fault occurs in the UPS, the output selector activates automatically and switches to bypass power without
interruption. The “Red ALARM” indicator lights, and the alarm buzzer sounds. The power supply route is the same as
for an overload.
Output from the UPS will stop if a power outage occurs during bypass operation due to the UPS fault. Contact your
supplier or SANYO DENKI as soon as possible.
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The following table shows functions and operations which activate to protect the UPS.
Operation panel (front panel) indicators
Item
Green
INPUT
Green
OUTPUT
Green
INV.ON
STAND BY
Red
ALARM
Red
O.L
Red
BATT.
LOW
Alarms
Buzzer
(*1)
Protective
functions
(UPS operations)
Notes
Preparation
(*2)
(*2)
-
-
-
-
Rectifier, charger,
operation
Power up
Normal
-
-
-
-
Inverter operation Power up,
operation
Serious failure
-
-
①
Stop inverter
Bypass supply
Overload
(effective value)
-
-
④
Auto return
Forced bypass
-
-
-
-
Bypass supply
Manual switch
to bypass supply
Input over
voltage
-
-
-
②
Battery operation
Input over
voltage
(prolonged)
-
-
③
Battery operation
(*3)
Power outage
-
-
-
②
Battery operation
Power outage
(prolonged)
-
-
③
Battery operation
(*3)
Input error
(frequency)
-
-
-
②
Battery operation
Input error
(prolonged)
-
-
③
Stop rectifier and
charger
Inverter operation
Battery operation
(*3)
Battery failure
-
①
Stop inverter
Bypass supply
(*1): Buzzer sound patterns:
①
*
Continuous tone
②
**......**......
③
**********......
Continuous beeps
④
****......****...
(*2): In this state, the LED blinks or is off, depending on the setting of “UPS Operation at
OFF” in the user
setting menu.
When this setting is set to “Bypass” :
When this setting is set to “OFF”
:
-
(*3): Battery operation. Stops inverter operation when final battery discharge is reached.
Press
to stop the buzzer.
Pit
Lit LED :
Blinking LED :
Buzzer Alarm :
①
-
④
Indication of the marks in the table
are as follows.
Utility
power
Output
Converter
Inverter
Charger
Batteries
Rectifier