KEHUA TECH KR-RM Series User manual

User Manual
KR-RM Series(1～3kVA) UPS

All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
i
Copyright © Xiamen KehuaHengshengCo.,Ltd.2016.All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Xiamen KehuaHengshengCo.,Ltd.
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and other Kehua trademarks are trademarks of Xiamen KehuaHengsheng Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the contract made between Kehua and the
customer. All or part of the products, services and features described in this document may not be within the
purchase scope or the usage scope. Unless otherwise specification in the contract, all statements, information,
and recommendations in this document are provided “AS IS”without warranties, guarantees or
representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
XIAMENKEHUA HENGSHENG CO.,LTD.
Address:
No.457,MalongRoad,TorchHigh-TechIndustrialZone,Xiamen,Fujian,China
Manufacturer:
ZHANGZHOU KEHUA TECHNOLOGYCO.,LTD.
Postal Code:
361000(XIAMEN), 363000(ZHANGZHOU)
Website:
www.kehua.com
E-mail:
[email protected]
The Customer Service
Telephone:
400-808-9986
Tel:
0592-5160516
Fax:
0592-5162166

Foreword
KR-RM Series(1～3kVA) UPS
User Manual
ii
All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
Foreword
Summaries
Thank you for choosing the Kehua KR-RM series(1～3kVA) UPS product!
This document gives a description of the KR-RM series(1～3kVA) UPS, including the features,
performance, appearance, structure, working principles, installation, operation and maintenance, etc.
Please save the manual after reading, in order to consult in the future.
Symbol Conventions
The manual quotes the safety symbols, these symbols used to prompt users to comply with safety
matters during installation, operation and maintenance. Safety symbol meaning as follows.
Symbol
Description
Alerts you to a high risk hazard that could, if not avoided, result in
serious injury or death.
Alerts you to a medium or low risk hazard that could, if not
avoided, result in moderate or minor injury.
Alerts you to a potentially hazardous situation that could, if not
avoided, result in equipment damage, data loss, performance
deterioration, or unanticipated results.
Anti-static prompting.
Be care electric shock prompting.
Provides a tip that may help you solve a problem or save time.
Provides additional information to emphasize or supplement
important points in the main text.
Product standard: Q-ZZKJ 001

KR-RM Series(1～3kVA) UPS
User Manual
Foreword
All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
iii
Change History
Changes between document issues are cumulative. The latest document issue contains all the changes
made in earlier issues.
Issue 001 (2016-08-29)
First issue.

Contents
KR-RM Series(1～3kVA) UPS
User Manual
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All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
Contents
1 Safety Description.........................................................................................................................1
1.1 Safety Announcements.....................................................................................................................................1
2 Overview.........................................................................................................................................5
2.1 Product Intro.....................................................................................................................................................5
2.2 Model Meaning................................................................................................................................................5
2.3 Features............................................................................................................................................................6
3 Basic Principle and Structure......................................................................................................7
3.1 Basic Principle .................................................................................................................................................7
3.2 Structure...........................................................................................................................................................8
3.2.1 Display Interface of the KR-RM Series(1～3kVA) UPS........................................................................8
3.2.2 Structure of the Front Panel and Rear Panel of KR1000-RM...............................................................10
3.2.3 Structure of the Front Panel and Rear Panel of KR2000-RM...............................................................10
3.2.4 Structure of the Front Panel and Rear Panel of KR3000-RM...............................................................10
4 Installation....................................................................................................................................11
4.1 Installation Place and Environment Requirements......................................................................................... 11
4.1.1 Installation Place Requirements............................................................................................................11
4.1.2 Environment Requirements................................................................................................................... 11
4.2 Unpacking......................................................................................................................................................12
4.3 Installation Procedures...................................................................................................................................13
4.4 Wire Selection................................................................................................................................................17
4.4.1 Selection of Input Air Switch................................................................................................................17
4.4.2 Selection of the Cross-sectional Area of Output Power Wire ...............................................................17
4.5 Electrical Connection.....................................................................................................................................17

KR-RM Series(1～3kVA) UPS
User Manual
Contents
All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
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4.5.1 KR1000-RM .........................................................................................................................................18
4.5.2 KR2000-RM .........................................................................................................................................18
4.5.3 KR3000-RM .........................................................................................................................................19
4.6 Check the Electrical Connection....................................................................................................................20
5 Use and Maintenance .................................................................................................................22
5.1 Preparation for Startup at the First Time........................................................................................................22
5.2 Startup Sequence............................................................................................................................................22
5.3 ON/OFF .........................................................................................................................................................22
5.4 Battery Maintenance ......................................................................................................................................23
5.5 Battery Replacement ......................................................................................................................................24
5.6 Maintenance Guide ........................................................................................................................................24
5.6.1 Safety Announcements..........................................................................................................................24
5.6.2 Periodic Preventative Maintenance.......................................................................................................25
5.6.3 Common Abnormal Problem Analysis..................................................................................................25
5.7 Troubleshooting..............................................................................................................................................26
5.7.1 Overview...............................................................................................................................................26
5.7.2 Troubleshooting ....................................................................................................................................26
6 Package, Transportation, Storage.............................................................................................29
6.1 Package ..........................................................................................................................................................29
6.2 Transportation ................................................................................................................................................29
6.3 Storage ...........................................................................................................................................................29
A Technical Specifications ...........................................................................................................30
B Acronyms and Abbreviations ..................................................................................................33

KR-RM Series(1～3kVA) UPS
User Manual
1Safety Description
All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
1
1 Safety Description
This chapter mainly describes the safety announcements. Prior to performing any work on the UPS,
please read the user manual carefully to avoid human injury and device damage by irregular
operations.
1.1 Safety Announcements
There exists high temperature and high voltage inside UPS. Please comply with the relevant safety
regulations and operation procedures during installation, operation and maintenance, or it will lead to
human injury or device damage. The safety announcements mentioned in the user manual is only as a
supplement to the local safety regulations. The manufacturer shall not be held liable for any breach or
violation of general requirements.
The required charging voltage of different brands and different types of battery are different. Make
sure that the charging voltage of UPS is suitable for battery. If any doubt, please consult the
manufacturer for support. Any change of system configuration, structure or components will affect
the performance of UPS. If the user wants to make any change, please consult the manufacturer in
advance.
Danger of high voltage!
Touching high voltage or mains directly or through damp objects will lead to lethal risk.
1. Only authorized professionals are allowed to open the UPS chassis! The input and output of the
UPS are dangerous high voltage. Touching high voltage will lead to lethal risk.
2. Before maintenance, disconnect the AC power and battery to isolate power input and measure
the output terminal bar by a voltmeter, which is to ensure that the input power is turned off and
in a safe condition.

1Safety Description
KR-RM Series(1～3kVA) UPS
User Manual
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3. Even if all external power are disconnected, there still exists residual electricity inside UPS, and
the output terminal bar may exist high voltage which may cause human injury. It is necessary to
put UPS aside for enough time(≥10min) to release charge completely, then open the UPS
chassis.
4. If the battery wires are not isolated with AC input, there may exist dangerous voltage between
battery terminal and ground terminal. The batteries exist high voltage, which may cause human
injury, pay attention to insulation when installing and using them.
5. During operation, take off conductive objects, such as watch, bracelet, ring, etc.
6. Personnel installing UPS should have the qualification of high voltage and AC power operation.
Power system only can be maintained and repaired by professionals.
7. Danger of electric leakage! UPS should be grounded prior to doing electrical connection. The
ground terminal must be connected with the ground.
Do not connect with the unbalance load, half-wave rectification load or inductive
load.
Do not connect with unbalance load, half-wave rectification load or inductive load in the output of
UPS, such as air-condition, blower, starter, electric drill, motor, daylight lamp, etc.
Drilling holes on the cabinet is prohibited!
Inappropriate drilling will damage components inside the cabinet. If metal debris generated by
drilling drops into the cabinet, circuit board may be short-circuit.
It is dangerous to operate during lightning storm!
During a lightning storm, it is prohibited to perform high voltage and AC power, as well as in the
tower or the mast. The atmosphere will generate a strong electromagnetic field. Therefore, in order to
avoid equipment struck by lightning, it is necessary to do the lightning protection and grounding in
time.

KR-RM Series(1～3kVA) UPS
User Manual
1Safety Description
All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
3
Be careful of electrostatic!
To prevent human electrostatic from damaging sensitive components, it must wear an anti-static wrist
strap before touching sensitive components (such as the flapper, circuit board, IC chip, etc.),and the
other end of anti-static wrist strap should be grounded well.
When UPS powers on, it is dangerous to mount or dismantle power wires.
When UPS powers on, it is dangerous to mount or dismantle power wires. Before performing the
operation, it must switch off the power switch. Before performing wiring, it should make sure that the
wire connection, wire labels are in accordance with the practical installation.
Do not connect the grounding wire and the neutral wire, the live wire and the
neutral wire reversely to avoid electrical short- circuit.
It should be grounded well and the voltage between the grounding wire and the neutral wire should
be less than 5V.
Please use the specified battery!
Non-specified battery will damage UPS.
Battery operation must be based on specifications!
Battery operation must be based on the battery instruction, especially battery wiring. Irregular
operation will cause battery damage, even human injury.
8. It is prohibited to short circuit the anode and cathode of the battery. The battery wires must be
fastened. It is prohibited to touch the two wiring terminals of battery or exposed end of wires
simultaneously, or it may cause battery damage or human injury.

1Safety Description
KR-RM Series(1～3kVA) UPS
User Manual
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All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
9. Prevent battery electrolyte from overflowing. The overflowing electrolyte will corrode the metal
objects and circuit board, which will lead to device damage and circuit board short-circuit.
10. Battery should be placed far away from fire source and all electrical equipments which easily
cause sparks, which is to avoid human injury or unnecessary loss.
Be careful of the rotating fan!
When dismantling fan, if the fan hasn't stopped rotating, do not put fingers or tools into the rotating
fan, which is to avoid device damage or human injury.
Keep good ventilation for the equipment!
Ensure that there is no object in the air inlet, air outlet, as well as in the front of fan, which is to keep
good ventilation.
The UPS is class A product！
When UPS is applied to residential building, additional measures should be took to inhibit the
harassment.

KR-RM Series(1～3kVA) UPS
User Manual
2Overview
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5
2 Overview
This chapter mainly describes the product model meaning, performance and features, etc.
2.1 Product Intro
KR1000-RM, KR2000-RM, KR3000-RM series UPS are the single-phase AC input and the
single-phase AC output, which are with all high frequency, pure online, double-conversion,
intelligent features. They are the perfect power protection for file server, enterprise server, center
server, mirco-computer, concentrator, telecom system, data center, medical device and others that
require high quality power protection. They are widely applied to the many key business areas, such
as post, finance, network, stock, railway, etc.
2.2 Model Meaning
The model meaning of KR-RM series(1～3kVA) is as shown in Figure2-1.
KR□□□□-RM
KR series online UPS
Output power
Equipped with tower-mounting
and rack-mounting
Figure2-1 The model meaning of KR-RM series(1～3kVA)
As shown in Figure2-1, "KR" means the product is the KR series online UPS. "□□□□" means the
rated output power, when "□□□□" is "1000", it means the output power is 1kVA; when "□□□
□" is"3000", it means the output power is 3kVA. "RM" means the product is equipped with
tower-mounting and rack-mounting.

2Overview
KR-RM Series(1～3kVA) UPS
User Manual
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All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
2.3 Features
Intelligent RS232 and USB communication
Through RS232 or USB standard data port and UPS power management software, it can realize the
three remote function between the computer and UPS, monitor the running and electrical data of UPS
on the computer, perform ON/OFF operation remotely and support SNMP network adaptor (external,
connect with UPS through RS232), which makes UPS be a network new member.
High input power factor
UPS adopts the advanced active PFC technology, which eases load in the power grid. It is the new
generation green power.
High cost performance
UPS adopts many kinds of power conversations and high frequency PWM technologies, which is
with high efficiency, small volume, light weight, improves the running reliability and reduces cost.
Perfect protection
Equipped with the functions, such as output over-voltage protection, battery under-voltage protection,
input over-voltage protection, triple over-current protection, etc. and solve the problems of the high
frequency UPS, such as poor adaptability in the power grid and weak anti-impact ability.
Low mains input voltage
Adopt the independent rapid detection technology. When the mains input voltage is 120V, which is
the lower limit, the battery still doesn't discharge. Therefore, in the mains mode, all output power gets
from the power grid, which is to ensure the battery is still in the 100% energy storage status, reduce
the battery discharge times and prolong working life.

KR-RM Series(1～3kVA) UPS
User Manual
3Basic Principle and Structure
All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
7
3 Basic Principle and Structure
This chapter mainly describes the working principle and structure of the product, including the
meaning of indicators on the panel and the definition of external port.
3.1 Basic Principle
When the mains is normal, the input of KR-RM series UPS converts into the steady DC voltage
through PFC, which supplies for DC/AC inverter to output steady 220V AC and charges the battery
at the time. When the mains is abnormal, the battery will boost into the DC voltage for DC/AC
inverter through DC/DC.
The working principle of KR-RM series(1～3kVA) UPS is as shown in Figure3-1.
Mains
220Vac
Charger
PFC
AC/DC Transfer
switch
Batteries
DC/DC
DC/AC Load
Figure3-1 Working principle of KR-RM series(1～3kVA) UPS
The pin corresponding relationship between RS232 port of UPS and RS232 port of PC is as shown in
Table3-1.
Table3-1 The pin corresponding relationship between RS232 port of UPS and RS232 port of PC
RS232 port of UPS
RS232 port of PC
9(3)
2(receiving end)
6(2)
3(transmitting end)

3Basic Principle and Structure
KR-RM Series(1～3kVA) UPS
User Manual
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All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
RS232 port of UPS
RS232 port of PC
7(5)
5(grounding end)
3.2 Structure
3.2.1 Display Interface of the KR-RM Series(1～3kVA) UPS
Figure3-2 The display interface of the KR-RM series(1～3kVA) UPS(rack-mounting)
Icon Illustration
The icon illustration is as shown in Table3-2.
Table3-2 Icon illustration
Icon
Illustration
UPS works in the mains mode
UPS works in the bypass mode

KR-RM Series(1～3kVA) UPS
User Manual
3Basic Principle and Structure
All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
9
Icon
Illustration
UPS works in the battery mode
UPS works in the ECO mode
Buzzer is in the silence status
UPS failure
/
/ / /
Stand for each unit respectively: AC voltage/DC
voltage/frequency/temperature/load percentage
Operation instructions of buttons on the panel
" " button
−When UPS is off, long press" " button for 1s, the UPS will be on.
−When UPS is on and in the mains mode, long press " " button for 3s, it will do the battery
test.
−When UPS is on and in the battery mode, long press " " button for 3s to silence the buzzer
(remove the mains abnormal alarm); then long press " " button for 3s again, it will cancel
the silence.
−When UPS is on and in the battery mode and with the battery low-voltage alarm, long press "
" button for 3s to silence the buzzer; then long press " " button for 3s again, it will
cancel the silence.
" " button
−When UPS is on, long press " " button for 1s, the UPS will be off.
" " button

3Basic Principle and Structure
KR-RM Series(1～3kVA) UPS
User Manual
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−Short press" " button, it will transfer the display information among output voltage, output
frequency, input voltage, input frequency, battery voltage, inner temperature, output load
percentage, fault prompting(when UPS failure), etc.
−Long press " " button for more than 5s, it will enter the setting page. Transfer the setting
options by the selection button and then long press " " button to confirm the setting. It can
set the display ways, rack-mounting or tower-mounting：" TWR " is tower-mounting, " RCK
" is rack-mounting, the default setting is "RCK". It can also set ECO mode, output
208/220/230/240V mode.
3.2.2 Structure of the Front Panel and Rear Panel of KR1000-RM
Communication
interface
USB port
EPO
Output socket Input
Over-current
rotector
Fan
LCD Panel Buttons
RS232 USB EPO
CIRCUIT PROTECTOR
250V,10A
AC INPUT
AC OUTPUT
10A Max.
DC INPUT
+
PRODUCEDBY:ZHANGZHOU KEHUA TECHNOLOGY
CO.,LTD. (CHINA)
NAME：UPS
MODEL：
INPUT：
OUTPUT：
DCINPUT：
1W+N+PE,AC220V,50Hz,4.8A
1W+N+PE,AC220V,50Hz,4.5A
1000VA/900W
KR1000-RM
36V,29.1A
Extended battery
port (Optional)
Figure3-3 Structure of the Front Panel and Rear Panel of KR1000-RM
3.2.3 Structure of the Front Panel and Rear Panel of KR2000-RM
LCD
panel Buttons
Communication
interface
Fan
Output
socket Over-current
protector
Input
USB port
EPO
AC INPUT
CIRCUIT PROTECTOR
250V,16A DC INPUT
RS232 USB EPO
AC OUTPUT
220V 9.1A TOTAL
PRODUCEDBY: ZHANGZH OU KEHUA TECHNOLOGY
CO.,LTD. (CHINA)
NAME：UPS
MODEL：
INPUT：
OUTPUT：
DCINPUT：
1W+N+PE,AC220V,50Hz,9.2A
1W+N+PE,AC220V,50Hz,9.1A
2000VA/1800W
KR2000-RM
48V,42.6A
+
Extended battery
port (Optional)
Figure3-4 Structure of the Front Panel and Rear Panel of KR2000-RM
3.2.4 Structure of the Front Panel and Rear Panel of KR3000-RM
LCD
panel Buttons
Communiction
interface
Fan
Output
socket Over-current
protector
Input
USB port
EPO
PRODUCEDBY:ZHANGZHOU KEHUA TECHNOLOGY
CO.,LTD. (CHINA)
NAME：UPS
MODEL：
INPUT：
OUTPUT：
DCINPUT：
1W+N+PE,AC220V,50Hz,13.6A
1W+N+PE,AC220V,50Hz,13.6A
3000VA/2700W
KR3000-RM
72V,42.6A
EACH OUTLET
10A MAX.
AC OUTPUT
220V 13.6A TOTAL
AC INPUT
CIRCUIT PROTECTOR
250V,20A DC INPUT
RS232 USB EPO
+
Extended battery
port (Optional)
Figure3-5 Structure of the Front Panel and Rear Panel of KR3000-RM

KR-RM Series(1～3kVA) UPS
User Manual
4Installation
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11
4 Installation
This chapter mainly describes the product installation, including the installation place and
environment requirements, packing, installation procedures, wire selection, electrical connection, etc.
4.1 Installation Place and Environment Requirements
Before installing UPS, the installation place and environment should meet the basic requirements of
normal running, which describes in this chapter. If the installation place conditions don't meet the
minimum requirements of normal running, it should do the corresponding change. When it meets the
requirements of normal running, install UPS.
4.1.1 Installation Place Requirements
The installation place should meet the basic requirements of normal running as below.
The machine room must be equipped with the suitable and effective fire fighting equipments.
The mains supplying power for UPS should be equipped with specified air switches or
multi-functional sockets.
It is prohibited to put the dangerous objects that are flammable and explosive in the machine
room.
Before installing UPS, it should do the grounding preparation. The voltage between the neutral
wire and the grounding wire of mains should be less than 5V.
The construction of the machine room should all have been finished and the floor has been
hardened. The installation place should be clean and without dust.
4.1.2 Environment Requirements
The UPS installation environment should meet the following requirements:
Environment temperature: -5℃～+40℃.
Relative humidity: 0%RH～95%RH, non-condensing.
Cooling method: air cooling.

4Installation
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Altitude: meet the provisions of GB3859.2-93.
Verticality: without vibration and the vertical gradient should be less than 5º.
Pollution grade: gradeⅡ．
UPS should be installed in the environment where is with good ventilation, cool, proper humidity and
without dust. The recommended working temperature is 20℃～25℃, and the humidity should be
about 50%.
Do not install UPS in the environment with metal conductive dust. UPS is only suitable to use in the
non-tropical climate conditions.
4.2 Unpacking
When installing UPS, it should carry the UPS to the installation place and then unpacking the
package. The package of UPS and accessories (battery, etc.) are carton or wooden box. Check
whether the UPS and accessories are correct according to the delivery list.
If there is any shipping damage to UPS or accessories or there is any discrepancy with ordering
contact, take notes in time and contact the local office or distributor immediately.
Random configuration is as shown in Table4-1.
Table4-1 Random configuration list
No.
Name
Unit
Number
Remark
1
Software
Set
1
Optional component
2
User manual
Copy
1
In the sealing bag
3
Warranty card
Copy
1
In the sealing bag
4
Packing list
Copy
1
In the sealing bag
5
Certification
Copy
1
In the sealing bag