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ENGLISH
EW3940/41/42/43
Line Interactive UPS with AVR
Table of contents
1.0 Introduction ...........................................................................................................2
1.1 Functions and features ......................................................................................2
1.2 Packing contents ...............................................................................................3
2.0 Remarks about Safety ...........................................................................................3
3.0 Working Principle..................................................................................................4
3.1 In AC mode ......................................................................................................4
3.2 AC Failure ........................................................................................................4
3.3 UPS outputs ....................................................................................................5
3.4 Battery and Charging:.......................................................................................5
4.0 Main Features .......................................................................................................5
4.1 Unattended Operation ......................................................................................5
4.2 Protection .........................................................................................................5
4.3 Three Kinds of Alarm Function..........................................................................5
4.4 Lock Phase Function ........................................................................................6
4.5 The Function of the Self-set Frequency ............................................................6
5.0 Specifications ........................................................................................................6
6.0 UPS Led................................................................................................................7
7.0 Installation and Operation......................................................................................7
8.0 Maintenance..........................................................................................................8
8.1 Preventative Maintenance ................................................................................8
8.2 Battery Maintenance.........................................................................................8
8.3 Handling of abnormity.......................................................................................9
9.0 Frequently Asked Questions and other related information..................................10
10.0 Service and support...........................................................................................10
11.0 Warning and points of attention .........................................................................10
12.0 Warranty conditions...........................................................................................11
1.0 Introduction
Congratulations with the purchase of this high-quality Ewent product! This product
has undergone extensive testing by Ewent’s technical experts. Should you
experience any problems with this product, you are covered by a five-year Ewent
warranty. Please keep this manual and the receipt in a safe place.
Register your product now on www.ewent-online.com and receive product updates!
1.1 Functions and features
The EW3940/41/42 and EW3943 are UPS systems designed to effortlessly handle a
power failure without the loss of important data. Because these devices are also
