East EA990G5 User manual

EAST GROUP CO., LTD.
EA990G5 10-30kVA (3/3)
Maintenance Manual
Prepared by Wu Zhifei / 20220830
Checked by Luo Changsheng / 20220831
Approved by Yang Lin / 20220831

i
Preface
General
This document provides maintenance requirement for high frequency three-input single-output
6-20KVA products, including safety precautions for maintenance, product description, description
on internal structure, description on composition of single boards, main components of single
boards, description on main functions, fault removal flow, replacement of single boards,
maintenance of single boards, and commissioning after maintenance, etc., to help an engineer to
provide technical support and maintenance service for three-input single-output 6-20K products.
User of document
This document (manual) is mainly applicable for the following engineers:
Technical support engineer
Maintenance engineer
Revision history
The revision history provides description on each document upgrade. The latest version of
document includes the upgraded content of all previous versions.
Document version: V01 (15 AUG 2014)
Formally issued for first time

Content
Preface.................................................................................................................................................. i
1 Safety precautions............................................................................................................................1
1.1 Hazards.................................................................................................................................... 1
1.2 Warning....................................................................................................................................1
2 Description of model........................................................................................................................2
2.1 Description of EA990G5 10-30kVA serial model...................................................................2
2.2 Appearance introduction of EA990G5 10-30kVA series model..............................................3
2.3 The operation control LCD panel introduction of EA990G5 10-30kVA................................ 6
3 Internal Introduction.................................................................................................................... 23
3.1 System Configuration............................................................................................................23
3.2 System Block Diagram..........................................................................................................26
3.3 Introduction to Internal Boards............................................................................................. 27
4 Troubleshooting............................................................................................................................. 28
4.1 Repair tool List...................................................................................................................... 28
4.2 Troubleshooting process........................................................................................................28
4.3 Alarm information collection................................................................................................ 30
4.4 Common faults and troubleshooting methods....................................................................... 30
4.5 Alarm detailed explanation and handling suggestions.......................................................... 30
5 Board replacement........................................................................................................................ 35
5.1 Board replacement of 10kVA model..................................................................................... 35
5.2 Board replacement of 15kVA model..................................................................................... 37
5.3 Board replacement of 20kVA model..................................................................................... 40
5.4 Board replacement of 30kVA model..................................................................................... 42
6 Board maintenance........................................................................................................................45
6.1 Maintenance of power board................................................................................................. 45
6.2 Maintenance of IP/OP board................................................................................................. 58
6.3 Maintenance of Bypass board............................................................................................... 66
7 Test.................................................................................................................................................. 72

7.1 Boards installation................................................................................................................. 72
7.2 Preparation before power-on................................................................................................. 72
7.3 Power-on and testing............................................................................................................. 72

1
1 Safety precautions
1.1 Hazards
1.As dangerous voltage exists in the UPS and the battery holder, installation and maintenance are only
completed by a professional engineer holding professional electrician qualification of the company or authorized
by the company.
2.Operators and maintainers, and professional technicians should receive full training on safe use and
equipment maintenance and work on the equipment after enough precautionary measures are taken and personal
safety equipment is used.
3.As the UPS is connected with the battery, voltage may exist on its output end even if it is not connected
with AC mains supply.
4.When the UPS is moved or rewired, the inputs, such as mains supply, the battery, etc., must be
disconnected, corresponding operation may be performed after the UPS powers down fully (more than 10min),
and otherwise the voltage may exist on its output end.
5.Before use, the UPS is reliably earthed to ensure personal safety and the normal use of the UPS.
6.When the UPS is maintained, the maintainer must wear insulated shoes and use insulated tools.
7.If temperature and humidity exceeds the limit value specified in the user manual, do not operate the
equipment.
8.Before maintenance of the UPS, all inputs and outputs of the UPS (including battery input) must be
disconnected.
9.Do not place the battery in fire to avoid explosion and endangering personal safety.
10.Do not stop the protector and ignore warnings, cautions and precautionary measures provided in the
manual and equipment nameplate.
1.2 Warning
1.Do not open the battery cover or damage the battery. If you are exposed to electrolyte, immediately wash
with plenty of clear water and seek medical advice.
2.Remove watch, ring and other metal article, wear insulating gloves and use the tools with insulated handle
during work on the battery.
3.During equipment operation, make sure that all sides and internal panels are securely fixed and front door
is closed.

2
2 Description of model
2.1 Description of EA990G5 10-30kVA serial model
Our EA990G5 10-30kVA series models are divided into tower type and rack type. The power level is
10/15/20/30KVA and the output power factor is 1.0. It can realize parallel operation of up to 4 units, provide
redundant power supply, and provide stable and reliable power supply for customer loads.
Table 2-1 EA990G5 10-30kVA serial model
Component
Model
Specification
Note
UPS
10kH
10kVA Long-delay Mode(Tower)
UPS
10kS
10kVA Standard Mode(Tower)
with ±10 12V/7AH internal
UPS
10kHRT
10kVA Long-delay Mode(Rack)
UPS
15kH
15kVA Long-delay Mode(Tower)
UPS
15kS
15kVA Standard Mode(Tower)
with ±20 12V/7AH internal
UPS
15kHRT
15kVA Long-delay Mode(Rack)
UPS
20kH
20kVA Long-delay Mode(Tower)
UPS
20kS
20kVA Standard Mode(Tower)
with ±20 12V/7AH internal
UPS
20kHRT
20kVA Long-delay Mode(Rack)
UPS
30kH
30kVA Long-delay Mode(Tower)
UPS
30kS
30kVA Standard Mode(Tower)
with two string ±15 12V/7AH internal
UPS
30kHRT
30kVA Long-delay Mode(Rack)
Table 2-2 Accessories of EA990G5 10-30kVA serial model
SNMP card/protocol
conversion
card(including
packaging materials)
iDA-ST200P
Remote network monitoring can be realized (RJ45 interface, as a
protocol conversion card, an adapter cable is required)
The built-in card is directly inserted into the card slot;
SNMP card/protocol
conversion
card(excluding
packaging materials)
iDA-ST200P
Remote network monitoring can be realized (RJ45 interface, as a
protocol conversion card, an adapter cable is required)
The built-in card is directly inserted into the card slot;
SMS cat
iDM-MDM200E
This device needs to be used with an SNMP card;
When the SNMP card detects that the UPS has an alarm, the SNMP
card can control the SMS modem to send the alarm content to the
mobile phone of the designated user;
It does not contain a SIM card and needs to be purchased separately.
At the same time, it only applies to standard SIM cards of China
Mobile and China Unicom.
SMS alarm
iDM-ALM200P
The alarm information of the UPS can be automatically sent to the
mobile phone of the designated user;
It does not contain a SIM card and needs to be purchased separately.
At the same time, it only applies to standard SIM cards of China
Mobile and China Unicom.
WIFI module
iDM-SPW202P
WIFI--glue stick antenna; you can connect the WIFIF module
through a mobile phone or computer to check the running status and
parameters of the UPS.
GPRS module
iDM-SPG203P
GPRS - glue stick antenna; you can connect the GPRS module

3
(external, DB9)
through a mobile phone or computer to check the running status and
parameters of the UPS.
2.2 Appearance introduction of EA990G5 10-30kVA series model
The overall appearance is shown in Figures 2-1 to 2-7 below.
Fig.2-1 The front pannel of 10-30kVA series UPS (Tower)
Fig.2-2 The front pannel of 10-30kVA series UPS (Rack)

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Fig.2-3 The rear pannel of 10kVA, 15kVA, 20kVA long-delay UPS (Tower)
Fig.2-4 The rear pannel of 10kVA, 15kVA, 20kVA standard UPS (Tower)

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Fig.2-5 The rear pannel of 30kVA UPS (Tower)
Fig.2-6 The rear pannel of 10kVA, 15kVA, 20kVA UPS (Rack)

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Fig.2-7 The rear pannel of 30kVA UPS (Rack)
Table 2-3 The introduction of front and rear pannel
NO.
Part name
1
LCD screen
2
LED
3
Smart card slot
4
Cold start button
5
RS232 port
6
RS485 port
7
USB port
8
EPO
9
Parallel port
10
Dry contact port
11
Maintenance Bypass Assembly
12
Bypass breaker
13
Output breaker
14
Input breaker
15
Terminal block and cover
16
PE
17
Battery breaker
2.3 The operation control LCD panel introduction of EA990G5 10-30kVA
This chapter introduces the functions and operator instructions of the operator control and display panel in
detail, and provides LCD display information, including LCD display types, detailed menu information, prompt
window information and UPS alarm information.
2.3.1 LCD panel for Cabinet
The structure of operator control and display panel for cabinet is shown in Fig.4-1. The operation control
panel of UPS is located on the front panel of the case. By operating the LCD, the ups can be operated, controlled,
and checked for all its parameters, operating status, and alarm information.