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Table of Content Page Chapter 1: System Introduction Guide 1.1. General Introduction 2 1.2. Block Diagram 3 1.3. System Layout and Description 4 Chapter 2: Field Calibration Guide 2.1. Introduction 5 2.2 Tools Required. 5 2.3. Technical Data 6 Chapter 3: Troubleshooting Guide 7 Appendix: 1. Wiring Diagram 11 2. Placement 11 3. Circuit Diagram

SERVICE MANUAL

VESTA PLASTIC VT-pro525/625

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Chapter One: System Introduction Guide 1.1. General Introduction

The microprocessor built-in Vesta series are equipped with following features to maximize its remarkale performance with less expansive price.

z Market leading light and compact design for modern OA environment and OEM flexibility. z Powerful CPU integrates all power stages, control and communication

Functions necessary for maximized UPS protection and functionality, Including power management status.

z True RS232/USB serial communication interface allows full function remote Control from any computer environment.

z Smart UPS Monitoring and Management Software bundled. z Automatic Voltage Regulations(AVR) maximizes device productivity

And minimizing battery usage. z Automatic Frequency Sensor reduces headache in frequency variation. z Easy swappable batteries preserve vital protection at all times. z Plug and Play function achieves ultimate user-friendliness for Windows application. z Modem/10 Base-T Network protection eliminates deadly spikes and

Surge in network cables. z Ground Fault Indicator detects improper wiring jobs, further terminating

Possible power problem sources.( 115V Type only) z The UPS keeps charging normally while the utility is normal z If the UPS turn off after discharged, the UPS will auto restart while the utility recover

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1.2. Block Diagram

Main Relay Filter

AC

Battery

Charger

Control

Input Voltage Sensor

CPU

Battery Voltage

Sensor

Output

Current

Sensor

Buzzer

Panel LED Interface

RS-232

Port

Main Transformer

Battery

Outlet

Inverter

Inverter

Current

Protector

AVR Relay

Schedule Relay

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1.3. System Layout and Description 1.3.1. Layout of Front Panel and Rear Panel

1) Front View

1 3 2

123

Type A Type B

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2) Rear View

Type A

Type B

3

2

4

16

3 4

16

2

5

3 4

16

2

5

3 4

16

2

5

6

3)Side View

Type B

Type A

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1.3.2. Description A. Front Panel Explanation 1) Line LED ( ) Line:Green LED remains standstill when Utility is normal.

Green LED flashes every 3 seconds and simultaneously buzzer alarms every 3 seconds when Utility failure. Green LED flashes every 0.5 seconds when the UPS is in battery charging mode. Green LED remains standstill and simultaneously buzzer alarms continuously when the UPS is in overload condition.

Green LED flashes every 0.5 seconds and buzzer alarms every 0.5 seconds when UPS is in battery low condition.

2) Battery LED( ) Red LED remains standstill and simultaneously buzzer alarms continuously when the UPS is in fault condition.

3) Main Switch 1. To Control on/off the UPS when Utility is normal. B. Rear Panel Explanation 1) AC Inlet This is to be connected with an AC power cord for plugging

into the wall Receptacle. 2) Backup Outlets This is to be connected to the computer sockets, which will be

protected by the UPS. Both of 2 and 3pcs NEMA5-15R and IEC320 Female sockets are provided.

3)Computer Interface(DB9)

Interface(USB)

VT-pro525/625: True RS232 Communication Protocol. The true RS232 type offers bi-directional signals for smart Monitor, remote on/off, etc.. Their Pin assignments of and VT-pro525/625 are as below.

Description VT-pro525/625 Tx 3 Rx 2

Ground 5 DTR 4&6 RTS 7 VT-pro525/625: True USB Communication Protocol. The true USB type offers bi-directional signals for smart Monitor, remote on/off, etc.. Their Pin assignments of and VT-pro525/625 are as below.

Description VT-pro525/625 TXD 4 RXD 3

USB-Ground 1 USB-Vcc 2

4) RJ11/45 Jack This is to offer you a modem/internet(RJ11/45) from line interference.

5) Ground Fault For 115Vac system only. It detects improper wiring jobs, further terminating possible power problem sources.

6) Fuse Rating 1)VT-pro525/115V: 6A/250V 2)VT-pro625/115V: 8A/250V 3)VT-pro525/220V: 4A/250V 4)VT-pro625/220V: 7A/250V

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Chapter Two: Field Calibration Guide

2.1. Introduction

There are several variable resistors(SVR or potential-meter) on the PCB. They are used for the adjustments of set points which vary from different electrical applications.

2.2.Tools Required Tools Description 1. True RMS Multi-Meter : Digital type 2. Variable Transformer : AC output range from 0-300V, 10-15A

adjustable 3. DC Power Supply : DC output range from 0-60V, 3A

adjustable 4. True RMS Power Meter : Digital(including VA, W, PF, Hz,

Voltage, Current) 5. Screw Driver : flat-type, cross-type Note: Most of the multimeters are Average type, with which read a stepwave AC voltage will result in a wrong readout. Therefore, a true RMS meter is definitely required for reading stepwave output. 2.3.Technical Data 2.3.1.Battery Charging Voltage set point Model

Battery Charging Voltage

1. VT-pro525 13.8VDC +/-0.5V 2. VT-pro625 13.8VDC +/-0.5V 2.3.2. 1Boost/1Buck AVR Transfer Point VT-pro525/VT-pro625 Over Voltage Under Voltage Nominal AVR High AVR High Rec AVR Low AVR Low Rec 115V System 126V+/-5V 121V+/-5Vac 105V+/-5Vac 110V+/-5Vac 220V System 240V+/-10V 230V+/-10V 200V+/-10Vac 210V+/-10Vac

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2.3.3. 1Boost/1Buck Setpoints for Over/Under Voltage Transfer A. VT-pro525/625 Over Voltage Under Voltage Nominal AC to Inv. Inv. To AC AC to Inv. Inv. To AC 115V System 143V+/-5.0Vac 138V+/-5.0Vac 87V+/-5.0Vac 92V+/-5.0Vac 220V System 275V+/-10.0Vac 265V+/-10.0Vac 165V+/-10.0Vac 175V+/-10.0Vac 2.3.4. 2Boost/1Buck AVR Transfer Point VT-pro525/VT-pro625

Over Voltage Under Voltage

Nominal AVR High AVR High Rec 1st AVR Low 1st AVR Low Rec 2nd AVR Low 2nd AVR Low Rec

220V System 240V+/-10V 230V+/-10V 200V+/-10Vac 210V+/-10Vac 170V+/-10Vac 180V+/-10Vac 2.3.5. 2Boost/1Buck Setpoints for Over/Under Voltage Transfer A. VT-pro525/625 Over Voltage Under Voltage Nominal AC to Inv. Inv. To AC AC to Inv. Inv. To AC 220V System 275V+/-10.0Vac 265V+/-10.0Vac 140V+/-10.0Vac 150V+/-10.0Vac 2.3.6. Setpoints for Battery Low and Battery Cutoff Model Battery Low Battery Cutoff

VT-pro525 11.0V +/-0.5VDC 10.1V +/-0.5VDC

VT-pro625 11.0V+/-0.5VDC 10.1V+/-0.5VDC

2.3.7. DC Fuse Rating Model No. VT-pro525 VT-pro625 30A*2 30A*2

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Battery out of order or without power?

Chapter Three: Troubleshooting Guide 3.1. Trouble-shooting Chart of VT-pro525/VT625

A

Return for repair.

Inverter boost fail.

DC fuse out of order?

Battery hardness loose? Reconnect the hardness back to Battery

Terminals properly.

Replace a 30A DC fuse.

Replace the battery a.VT-pro525:12V/7AH b.VT-pro625:12V/7AH

Change the defective ones.

U7 PIC16F73 out of order?

Q17Q18Q19Q20 MosFET are out of order ?

Change the U7.

Q10DZ1D15 D16D18D19Main Transformer out

of order? Replace the defective one.

No

Yes

Yes

Yes

No

Yes

No

No

Yes

Yes

No

Yes

No

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B

Return for repair.

Replace the defective one. D15D16D18D19U3D13C13D20Q12D17

D21D39R39 out of order?

Battery hardness loose? Reconnect the battery hardness back to the battery terminal.

Replace 30A DC fuse. DC fuse out of order?

Replace the battery a.VT-pro525:12V/7AH b.VT-pro625:12V/7AH

Battery voltage is raised when charging?

Correct input source Is Input Source normal?

Battery can not be charged.

Yes

No

Yes

Yes

No

Yes

No

No

Yes

Yes

No

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BZ1 U4

CN1

CN3

P1

CN2 F1U7

BAT+ BAT-

Q17 Q18 Q19 Q20

1

R24 R8

SINK3 SINK4

K4

F2

T3R39

T4 SW1

U3 K1K2K3K5D15

D16 D18

D19

CN9

CN8

DZ1 Q12

U5

Can not to hear audio alarm.

Buzzer out of order?

U7 PIC16F73 out of order?

Return for repair.

Replace the buzzer

Replace the U7.

No

Yes

Yes

Yes

No

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RS232/USB Interface

RJ11 Interface

CN2 BAT+

BAT-

CN1CN3

CN8

CN9

P1

SINK3 SINK4

BATT+ -

PCB Top view

Front Panel switch

Front Panel LED

To inlet/outlet.

To the JST3.96 type of Main transformer.

SINK3/SINK4. To the O type terminal

12V

SW1