AEC Star T3 Manuale utente

ServiceManual Star T3/T3R UPS

1kVA~3kVA 220VAC

www.allis.com.tw

ST3 1-3kVA Service Manual Rev.1

Content

1. PSDR Introduction............................................................................................................................ 1

1.1 1 kVA PSDR ............................................................................................................................ 1

1.2 2/3 kVA PSDR ......................................................................................................................... 1

2. Fault and Warning ............................................................................................................................ 2

3. Troubleshooting................................................................................................................................ 3

3.1 Quick Start............................................................................................................................... 3

3.2 PFC Analysis:.......................................................................................................................... 4

3.3 Boost Analysis......................................................................................................................... 5

3.4 Inverter Analysis...................................................................................................................... 6

3.5 SPS Module Analysis .............................................................................................................. 7

3.6 1A Charger Module Analysis ................................................................................................... 8

3.7 IGBT Driver Module Analysis .................................................................................................. 9

4. Final testing.................................................................................................................................... 10

ST3 1-3kVA Service Manual Rev.1

Allis Electric Page 1 of total 12 September 2006

1. PSDR Introduction

1.1 1 kVA PSDR c

defghij

1.2 2/3 kVA PSDR

idee

，，

jcgf

1. Charger Module

2. Fan driver

3. Inverter IGBT Driver Module

4. PFC IGBT Driver Module

5. PFC Control Module

6. Boost IGBT Driver Module

7. SPS Module

8. Boost Control Module

ST3 1-3kVA Service Manual Rev.1

Allis Electric Page 2 of total 12 September 2006

2. Fault and Warning

LCD & LED Status /

Audible Alarms Possible Cause Action

Fault Warning Normal

yUPS in Bypass Mode.

yThe alarm beeps continuously.

AC: OK BATT:OK

TEMP Fail 1. Fan fail.

2. Temperature is

higher than

allowed operation

temperature.

1. Replace the fan.

2. Reduce ambient

temperature or O/P load.

Fault Warning Normal

yUPS in Bypass Mode.

yFault LED lights up and the

alarm beeps continuously.

AC: OK BATT:OK

Inverter Fail 1. Inverter circuit

failed.

2. Inverter driver

failed.

3. PFC circuit failed.

4. Output shorted

1. Replace the Inverter

components or driver.

2. Replace the PFC

components or driver.

3. Remove the output

shorted.

Fault Warning Normal

yUPS in Normal Mode, but

battery capacity is low.

yThe alarm beeps once every

second for battery low.

AC: OK BATT:LOW

Normal Mode 1. Charger may

break down. 1. Please replace charger

board.

Fault Warning Normal

yUPS stop working.

yThe alarm beeps continuously.

AC: OK BATT:OK

DC_BUS Fail 1. Boost circuit

failed.

2. Inverter circuit

failed

3. PFC circuit failed

4. BUS circuit failed.

1. Replace the Boost

components.

2. Replace the Inverter

components.

3. Replace the PFC

components.

4. Replace the BUS circuit

components.

ST3 1-3kVA Service Manual Rev.1

Allis Electric Page 3 of total 12 September 2006

3. Troubleshooting

3.1 Quick Start

Before any check of UPS, please check the components as listed in the following table. This action could help you find

problem quickly and make sure these components good or not first.

Possible Circuit Block Coded Components Description Failure Mode

BAT FUSE 1K/3K:F1/F2;2K:F1 Fuse Open

I/P FUSE (on PSDR) F3, Fuse Open

2K/3K:D16, D17, REC02

1K:D10, D11, REC1

Diode Short or open

PFC Correction

2K/3K:Q09,1K:Q14 IGBT C-E short or open

2K/3K:Q04, Q05, Q06Q07

1K:Q4, Q6, Q10Q11

MOSFET D-S short or open

Push-Pull Booster

2K/3K:D05, D06, D07, D08

1K:D12, D13, D14, D15

Power Diode Short or open

Inverter 2K/3K:Q13, Q14, Q15, Q16

1K:Q12, Q13

IGBT C-E short or open

Charger module Q2 MOSFET D-S short or open

D10,D11,D12,D13D15 Power Diode Short or open

SPS module Q201 MOSFET D-S short or open

D202,D203 Power Diode Short or open

If the fuse is open, replacing fuse only, DO NOT mean you have solved the problem. General

speaking, fuse open was caused by other failure of components; therefore, you must find the

real defective components and replace them, before restart the UPS.

ST3 1-3kVA Service Manual Rev.1

Allis Electric Page 4 of total 12 September 2006

3. Troubleshooting

3.2 PFC Analysis:

In this section, some components you could check to see if failure occurs on PFC Correction circuit as shown below. Be

aware of F3 fuse open indicates failure of this block. Please replace all faulty components before re-start the UPS.

1kVA-PFC

2/3kVA-PFC

Step Checked components Instrument

function Reference

Value Failure Mode

1 F3 ΩShort Open

2 2K/3K:Q09(GS)

1K:Q14(GS)

Ω46.8kΩShort or open

3 2K/3K:D16,D17

1K:D10,D11

DIODE 0.418 Short or open

4 2K/3K:REC02 (+,〜),(〜,-)

1K:REC1 (+,〜),(〜,-)

DIODE 0.46 Short or open

Action ltem: If all above-stated components are replaced well and UPS still can’t work, change PFC Module

and PFC IGBT driver module.

ST3 1-3kVA Service Manual Rev.1

Allis Electric Page 5 of total 12 September 2006

3. Troubleshooting

3.3 Boost Analysis

General speaking, the most distinct phenomenon of failure on this section is F1 and F2. Open finding this will be very

helpful to repair them.

1kVA-Boost

2/3kVA-Boost

Step Checked components Instrument

function Reference

Value Failure Mode

1 F1,F2 Ωshort open

2 2K/3K:Q04~Q07 (G.S)

1K:Q4,Q6,Q10,Q11(G.S)

Ω23.49kΩshort or open

3 2K/3K:D05,D06,D07,D08

1K:D12,D13,D14,D15

DIODE 0.41 short or open

Action ltem:

(1) Make sure the DC fuses with same rating as original ones for replacement. Otherwise, unpredictable

danger might happen.

(2) If all above-stated components are replaced well and UPS still can’t be DC start, change Boost Control

Module.

ST3 1-3kVA Service Manual Rev.1

Allis Electric Page 6 of total 12 September 2006

3. Troubleshooting

3.4 Inverter Analysis

1kVA-Inverter

2/3kVA-Inverter

Step Checked components Instrument

function Reference

Value Failure Mode

1 2k/3k:Q14,Q13,Q16,Q15 (G,S)

1k:Q12,Q13 (G,S)

Ω23.5kΩShort or open

2 2k/3k: D30,D31,D32,D33

1k: D21,D22

Ω70

46.6

Short or open

Action ltem: If fail condition stated in resistance R110, R106, R117 and R119 of 2/3kVA and R53 and R37 of

1kVA, there is high possibility that the corresponding photo couplers are damaged, change the Inverter IGBT

driver module

ST3 1-3kVA Service Manual Rev.1

Allis Electric Page 7 of total 12 September 2006

3. Troubleshooting

3.5 SPS Module Analysis

1 kVA-SPS Module

2/3 kVA-SPS Module

Step Checked components Instrument

function Reference

Value Failure Mode

1 Q201(S,D) DIODE 0.42 Short or open

2 U01 (3845) PIN 5-6

PIN 5-7

PIN 5-8

PIN 6-8

Ω46.7K

38K

4.31K

50.9K

Too low

Action ltem: Even If the input source connected with UPS, the UPS still does not work. The high possible

cause is on SPS Module.

ST3 1-3kVA Service Manual Rev.1

Allis Electric Page 8 of total 12 September 2006

3. Troubleshooting

3.6 1A Charger Module Analysis

1 kVA-Charger Module

2/3 kVA-Charger Module

Step Checked components Instrument

function Reference

Value Failure Mode

1 Q2(S,D) DIODE 0.45 Short or open

2 U07 (3845) PIN 5-6

PIN 5-7

PIN 4-8

Ω

47K

20K

7.48K

Too low

3 D10.D11,D12,D13,D15 DIODE 0.45 Short or open

Action ltem: UPS can work on bypass Mode normally when the input source connected, but it can not

start-up completely. The high possible cause is on Charger Module.

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