2
EW3941 / EW3942 / EW3943
Summary
1.0 Remarks about Safety ........................................................................................... 2
2.0 Working Principle .................................................................................................. 3
2.1 In AC mode ...................................................................................................... 3
2.2 AC Failure ........................................................................................................ 3
2.3 Battery and Charging: ....................................................................................... 4
3.0 Main Features ....................................................................................................... 4
3.1 Unattended Operation ...................................................................................... 4
3.2 Protection ......................................................................................................... 4
3.3 Three Kinds of Alarm Function.......................................................................... 4
3.4 Lock Phase Function ........................................................................................ 4
3.5 The Function of the Self-set Frequency ............................................................ 4
4.0 Specifications ........................................................................................................ 5
5.0 UPS Led ................................................................................................................ 5
6.0 Installation and Operation ...................................................................................... 5
7.0 Maintenance .......................................................................................................... 6
7.1 Preventative Maintenance ................................................................................ 6
7.2 Battery Maintenance ......................................................................................... 6
7.3 Handling of abnormity ....................................................................................... 7
8.0 Packing List ........................................................................................................... 7
9.0 Service and support ............................................................................................... 7
10.0 Warning and points of attention ........................................................................... 8
11.0 Warranty conditions ............................................................................................. 9
12.0 Declaration of Conformity .................................................................................... 9
1.0 Remarks about Safety
In order to keep safe in using the UPS, please comply with the following:
Please charge the battery at least 12 hours before the UPS is in operation.
After the battery is discharged or over three months without operation, the battery should be
charged immediately for at least 12 hours, ensuring the battery is full and avoiding any
unnecessary damage of the battery.
The UPS is specially designed for computer only and it should not be connected with any
inductive or capacitive load, like electromotor, daylight lamp, laser printer, etc.
The UPS is not suitable for being used in life support systems, because it may have some
problems and bring trouble to the life support systems. The responsibility will be users', if they
insist on using the UPS in life support systems.
It is normal that the temperature of the UPS surface reaches up to 50
℃
when it is in operation.
When AC fails and the
“
ON
”
button on the front panel is pressed, the UPS will output
voltage; if the “OFF” button on the front panel is pressed, the UPS will not output voltage.
It is forbidden to open the case, because there is danger with electricity. If there is problem,
please handle with the instruction of experts.
It is forbidden to put container containing liquid inside on the UPS, because it will cause danger
of electric shock or fire when the UPS short-circuits.
When the UPS is abnormal, please cut off power immediately and turn to experts or the dealer
for help.
