Acson R5CM, ACK, A5CK, A5WMX, ACC Service Manual Book

SERVICE

GUIDE BOOK

ACSON Service Guide Book

L208A Conversion

WMF U1.4 to L2EF Conversion

Table of Contents

1.0 Model Name

1.1 Product Name Description

1.2 Nomenclature

2.0 Conversion Table

3.0 Product Mainboard vs. Handset Matrix

3.1 Product Mainboard vs. Handset Matrix

4.0 Controller Development History

4.1 Controller Development History

5.0 Handset Operating Guide

5.1 G6

5.2 G8

5.3 G12

5.4 G18

5.5 GS02

5.6 APJ2

5.6 SLM3

5.7 Sequential LCD

5.8 Netware 3

6.0 Controller Configuration

6.1 Auto Random Restart

6.2 Hot Keep Selection

6.3 Auxiliary Heater Conversion

6.4 Multi Split Conversion

6.5 Sequential Controller

6.6 Chilled Water Fan Coil Unit – W1V

6.7 Chilled Water Fan Coil Unit – W2.0

7.0 Service Diagnosis

7.1 Self Diagnosis Table

7.2 General Check

7.3 General Troubleshooting Guide

Appendix Resistance – Temperature Characteristic

2.1 Conversion Table

6.8 U1.5 

6.9

...............................

2 3

5

6

8

10 12 14 16 18 21 24 26 28

30 31 33 36 37 42 43 44 45

46 80 81

88

1

ACSON Service Guide Book

1.0 Model Name

1.1 Product Name Description

No. Description Generic Model Name ACSON Brand

1 Wall Mounted Fan Coil Unit WM / 5WM AWM / A5WM 2 Wall Mounted AC Inverter Fan Coil Unit WMV AWMV 3 Wall Mounted DC Inverter Fan Coil Unit 5WMX A5WMX 4 Wall Mounted DC Inverter-Y Fan Coil Unit 5WMY A5WMY 4 Ceiling Exposed Fan Coil Unit CE / 5CE RCM / R5CM 5 Ceiling Cassette Fan Coil Unit CK / 5CK ACK / A5CK 6 Ceiling Concealed Fan Coil Unit CC / 5CC ACC / A5CC 7 Ducted Split Blower Unit SB ADB 8 Chilled Water Fan Coil Unit CW ACW

9 Water Source Heatpump Split Unit WSS / 5WSS AWSS / A5WSS 10 Horizontal Water Source Heatpump Unit WH AWH 11 Air Cooled Mini Chiller AC / 4AC / 5AC AMAC / A4MAC / A5MAC 12 Single Split Condensing Unit SL / 4SL / 5SL ALC / A4LC / A5LC 13 Single Split AC Inverter Condensing Unit SLV ALCV 14 Single Split DC Inverter Condensing Unit 5SLX A5LCX 15 Single Split DC Inverter Condensing Unit 5SLY A5SLY 15 Modular Split Condensing Unit MSS / 4MSS AMC / A4MC 16 Multi Split Series MSD / 4MSD AMSD / A4MSD

MST / 4MST AMST / A4MST

MSH AMSH 17 Multi Split AC Inverter Condensing Unit MSV AMSV 18 Multi Split DC Inverter Condensing Unit 5MSX A5MSX 19 Multi Split DC Inverter Condensing Unit 5MSY A5MSY 20 Multi Digital Scroll Units MDS/ 5MDS AMDS/ A5MDS 21 Horizontal Condensing Unit HDC / 5HDC AHDC / A5HDC 22 Vertical Condensing Unit VCU AVCU 23 Air Cooled Roof Top Packaged Air

Conditioner

24 Air Cooled Inverter Mini Chiller 5ACV A5ACV

RT / 4RT ART / A4RT

2

ACSON Service Guide Book

Electrical

F : 380

-

415V/3Ph/50Hz

Product Specifications Variation

AA : Revision

Connection Type

X : Not Applicable

Model Name

CK : Ceiling Cassette

Series

G : G Series

Piping

Omitted if 2 pipes system

Capacity

10 : 10,000 Btu/h

Brand

A : Acson

Model Type

Refrigerant

Omitted if R22

Omitted if Non

-

inverter

1.2 Nomenclature

Indoor Unit

F : Flare

A : 220-240V/1Ph/50Hz

A WM

10 G W

-

H : 4 Pipes System

R : Heat Pump W : Chilled Water Fan Coil Omitted if DX Cooling Only

A X A A

Inverter Series

X: X-Series Y: Y-Series

WM : Wall Mounted

5 : R410A

3

ACSON Service Guide Book

Electrical

Market Region

C : Export with CE mark

Compressor

Specifications Variation

Others

A : First Issue

Model Name

MC : Modular Split Condensing Unit

Capacity

10 : 10,000 Btu/h

Model Type

Omitted if Cooling Only

Series

C : C Series

Brand

A : Acson

Refrigerant

Omitted if R22

Inverter Series

Omitted if non

-

invert

er

Outdoor Unit

O : Standard Unit I : Gold Fins G : Low Ambient Unit H : High Ambient Unit

P : Panasonic

A : 220-240V/1Ph/50Hz F : 380-415V/3Ph/50Hz

A LC 10 C R

-

A C P O A

R : Heat Pump

X : X - series Y : Y – series

LC : Single Split Condensing Unit

5 : R410A

4

ACSON Service Guide Book

8.1

−

°

2.0 Conversion Table

2.1 Conversion Table

Capacity

Btu/hr MBH kCal/Hr kW

1 0.001 0.252 0.293 x 10-3

1000 1 252 0.293

3.968 0.004 1 1.162 x 10-3 3412 3.412 860.04 1

Pressure

PSI kg/cm2

1 0.07 27.7 2.309 0.69 x 104

14.22 1 394.08 32.84 9.81 x 104

3.61 x 10-2 2.538 x 10-3 1 0.083 248.84

1.45 x 10-4 0.1 x 10-4 0.004 3.349 x 10-4 1

(in.) (ft.) (Pa)

Flow Rate

L/s m3/hr m3/s U.S. GPM CFM

1 3.6 0.001 15.85 2.119

0.278 1 0.278 x 10-3 4.403 0.588 1000 3600 1 15850 2119

0.063 0.227 0.063 x 10-3 1 0.1337

0.472 1.7 0.472 x 10-3 7.481 1

Temperature Velocity

°F = (18 x °C) + 32

32

=°FC

fps m/s fpm

1 0.305 60

3.281 1 196.9

0.017 0.005 1

Volume

L m3 U.S. G.P.M. ft3 1 0.001 0.264 0.0353

1000 1 264 35.3

3.785 3.785 x 10-3 1 0.134

28.315 0.028 7.48 1

Area

in2 ft2 m2 cm2

1 6.94 x 10-3 6.452 x 10-4 6.452

144 1 0.093 929.03

1550.06 10.764 1 1 x 104

0.155 1.076 x 10-3 1 x 10-4 1

W.G. Pascal

5

ACSON Service Guide Book

6

3.0 Product Mainboard vs. Handset Matrix

Handset

Type No.

Main Board (IC)

Model

L2.0 L2GSN L208A W_2_03A U1SB125 2P206569-4 SQ2.0 VA2.0 VA3.0

Standard Optional

1 WM - F Series



G18 SLM3 + AC5300 / Netware 3

2 WM - G Series



G18 SLM3 + AC5300 / Netware 3

3 WMS - G Series



G18 SLM3 + AC5300 / Netware 3

4 WM – J Series



G18 -

5 CK - A/B/C/E Series



G18 SLM3 + AC5300 / Netware 3

6 CE - D Series



G18 SLM3 + AC5300 / Netware 3

7 CE - E Series



G18 SLM3 + AC5300 / Netware 3

8 CC - C Series



SLM3 Netware 3

9 CC - D Series



Netware 3 SLM3 SB - B/C Series SB 75 – 100B/BR



SLM3 Netware 3 SB 125 – 150B/BR



SLM3 -

SB 125CR



SLM3 -

10

SB 150B2/BR2 – 600B4/BR4



SQ-LCD SB – D/ER Series SB 75 – 100D/ER



SLM3 Netware 3

SB 125 – 150D/ER



SLM3 -

SB 125D2 – 500D4



SQ-LCD -

11

SB 125ER2 – 600ER4



SQ-LCD RT Series RT 55 – 120A/AR



SLM3 -

12

RT 150 – 420A/AR



SQ-LCD WMX – G Series



G18 SLM3 + AC5300

CKX – A/C Series



G18 SLM3 + AC5300

CEX – E Series



G18 SLM3 + AC5300

13

CCX – C Series



SLM3 Netware 3

14 WMY – J Series



G18/ GS02

Netware 3

DX

15 WMY – K Series



APJ2 -

ACSON Service Guide Book

7

Handset

Type No.

Main Board (IC)

Model

W2 MC1.0 LWS2 APM01CB APM02D

Standard Optional

13 WM – GW Series



G18 SLM3 + AC5300 / Netware 3

14 CK – AW/AWH/CW Series



G18 SLM3 + AC5300 / Netware 3

15 CE – DW Series



G18 SLM3 + AC5300 / Netware 3

16 CE – EW Series



G18 SLM3 + AC5300 / Netware 3

17 CC – CW Series



SLM3 Netware 3

CW FCU

18 SB – BW Series N/A -

AC – C Series AC 20 – 60C/CR



C. Panel -

AC 80 – 150C/CR



C. Panel -

5AC 20 – 25C/CR



C. Panel -

Mini Chiller

19

5AC 30 – 55C/CR



C. Panel -

20 5WMWS – GR



G18 SLM3 + AC5300 / Netware 3

21 5CKWS – AR/CR



G18 SLM3 + AC5300 / Netware 3

22 5CCWS – CR



SLM3 Netware 3 WH – B Series WH 11 – 20B/BR



SLM15A -

WSHP

23

WH 25 – 70B/BR



APW04A -

ACSON Service Guide Book

8

4.0 Controller Development History

Handset Model

Year Main Board

Wireless Wired Cooling Heating

Remarks

WM 10/15D WM 10/15DR Copper sensor

1996 Challenger 2.1 & 2.2 G3 -

WM 20/25C WM 20/25CR

1996 Challenger 2.2 G3 - WM 07/10E - Copper sensor

1997 Challenger 2.4 G3 & G6 -

WM 10/15D WM 20/25C

WM10/15DR

WM 20/25CR

1998 Challenger 2.4 G3 & G6 - -

WM 07/10ER WM 10/15FR

1998 Challenger 5

G3 G6

-

WM 07/10E WM 10/15F

-

1999

Challenger C3A Challenger C3B Challenger C3B

G3 & G6 SLM2 (10 core wire)

CK-A

CE-C/D

CC-B/MSB/HSB

CK-AR

CE-CR/DR

CC-R/MSB-R/HSB-R

2000 Mini Chiller MCH01 - - AC (40-125)B AC (40-125)BR Cooling & Heatpump

2001 Chilled Water W1V2 G6 Netware 1

WM-FW / CE-DW / CC-CW / CK-AW / HSB-

BW

Convertible PCB

2001 Sequential Controller - Sequential Controller SB (150-500)B SB (150-500)BR Multiple compressor

Universal Board D1.0 G6 - W M (10-25)F - Cooling only U1.3 G6 - - WM (10-25)FR Heatpump only

2001

U1.4 G6 SLM3 (4 core wire) CE-D / CK-A / CC-C

CE-DR / CK-AR /

CC-CR

Cooling & Heatpump

2001 D2.0 G6 / G8 - WM (10-25)F - Cooling only

2001 Mini Chiller SZMC01 - -

AC/4AC (40-58)A,

AC/4AC75-125B

AC/4AC (40-58)AR,

AC/4AC75-125BR

Cooling & Heatpump

Inverter VA1.9 (Indoor) G8 Turbo - - WMV10FR In set form only

2001

VB1.0 (Outdoor) SLV10BR

2002 Sequencer Controller - SQ-LCD SB (150-500)D SB (150-500)DR Multiple compressor

D2.0 G8 - WM30F - Cooling only

2002

U1.4 G8

SLM3 /

Netware 2 (optional)

CK (15/20/25/30)B

WM (10-25)FR,

WM30FR

CK (15/20/25/30)BR

Heatpump only

Cooling & heatpump

ACSON Service Guide Book

9

Handset Model

Year Main Board

Wireless Wired Cooling Heating

Remarks

2002 Chilled Water W1V3 G6

SLM3 /

Netware 2 (optional)

WM-FW / CE-DW / CC-CW / CK-AW / CK-BW

Valveless application

only 2002 Multi Split Indoor, MS10.0 G8 - - WMS (10-20)FR Auto random restart 2003 Mini Chiller MCH03A - SC302 AC/4AC(80-150)C AC/4AC (80-150)CR Cooling & heatpump

2003 Universal U1SB125 - SLM3 – single speed

SB (125/150)

B1/C1/D1

RT/4RT (60-120)A

SB (125/150)

BR1/CR1/DR1

RT/4RT (60-120)AR

Cooling & heatpump

RT/4RT (150-300)A

RT/4RT (150-

300)AR

SB 150B2-600B4 SB 150BR2-600BR4

2003 Sequential Controller, SQ - SQ-LCD

SB 125D2-500D4 SB125DR2-500DR2

Cooling & heatpump

2004 U1.4 G8 - CK (10-20)C CK (10-20)CR Cooling & heatpump

WM (07-15)G WM (07-15)GR

2004 L2.0 G12 -

WM (20-25)G WM (20-25)GR

Cooling & heatpump

MC01 - Chiller Panel AC (80-150)C AC (80-150)CR Cooling & heatpump

2004

MCH01 - Chiller Panel AC (20-60)C AC (20-60)CR Cooling & heatpump

G12 - CE (15-28)E CE (15-28)ER Cooling & heatpump

2005 L208A

- Netware 3 CC (75-100)D CC (75-100)DR Cooling & heatpump U1.4 - SLM3 SB (75-100)ER Universal U1SB125 - SLM3 – single speed SB (125-150)ER1

2005

Sequential Controller, SQ - SQ-LCD SB 125ER2-600ER4

Heatpump only

Inverter VA2.0 G12 - 5WMX (10-25)GR In set form only

2005

5SLX (10-25)CR

2005 MC01 - Chiller Panel 5AC (030-055)CR Heatpump only

G8 & G12 SLM3 / Netware 3

CE-D / CK-A/B/C /

CC-C

CE-DR / CK-

AR/BR/CR / CC-CR 2006 L208A

- SLM3 SB (75-100)B/D SB (75-100)BR/ER

Cooling & Heatpump

2006 Sequential Controller, SQ - SQ-LCD RT (360-420)A RT (360-420)AR Cooling & Heatpump

2006 Chilled Water W2 G8 & G12 SML3 / Netware 3

WM-GW / CE-DW / CE-EW / CC-CW / CK-

AW/AWH/CW / SB-BW 2008 L2GSN G18 - (5)WM-J/JR Cooling & Heatpump 2009 W_2_03A G18 - 5WMY-J/JR Cooling & Heatpump

ASCON Service Guide Book

5.0 Handset Operating Guide

5.1 G6

Outlook

Operation Guide

1. “ON/OFF” Switch

•

Press to start the air conditioner unit.

•

Press again to stop the unit.

2. Temperature Setting

•

Set the desire room temperature.

•

Press button to increase or decrease the set temperature. Setting range are between 16°C to

30°C setting (60°F to 80°F) (Optional setting from 20°C to 30°C).

•

Press ▲ or ▼ button simultaneously will toggle the temperature setting between °C and °F.

3. Automatic Air Swing

•

Press the button to activate the automatic air swing function. The swing angle ranging from

horizontal to 25° to bottom.

4. “SLEEP” MODE

•

Press the button to activate sleep mode. This mode can only be activated while in cooling or

heating mode operation. If it is activated in “COOL” mode, the set temperature will be increase 0.5°C after 30 minutes, 1°C after 1 hour and 2°C after 2 hours. Whereas in “HEAT” mode, the set temperature will decrease by 1°C after 30mins, 2°C after 1 hour and 3°C after 2 hours.

•

This function is available under COOL, HEAT & AUTO mode.

10

ASCON Service Guide Book

5. Timer Setting



Press set button to activate the timer setting (from 1 hour to 15 hour) of the air conditioning

unit. It will be in “On” or “Off” condition after the set time depending to the current condition (either from “On” to Off” or vise versa)



To cancel the timer setting, press the button continuously until the timer display goes off.

6. Operation Modes

•

Press the “mode” button for select the type of operating mode.

•

Cooling only unit:

Cool → Dry → Fan.

•

Heatpump unit:

Auto → Cool → Dry → Fan → Heat

7. Fan Speed and Ventilation Mode Selection

•

Press the button until the desired fan speed is achieved.

8. Signal Transmission Indication

•

Blink to confirm the last setting has been send to the unit.

11

ASCON Service Guide Book

5.2 G8

Outlook

Operation Guide

1. Transmission Source

•

The source where the signal will be transmitted.

2. Signal Transmission Indication

•

Blink to confirm the last setting has been send to the unit.

3. On/Off Button

•

Press once to start the air conditioner.

•

Press again to stop the unit.

4. Temperature Setting

•

To set the desired room temperature, press the button to increase or decrease the set

temperature.

•

The temperature setting range is from 16°C to 30°C (Optional setting 18°C to 30°C).

•

Press both buttons simultaneously to toggle the temperature setting between °C and °F.

12

ASCON Service Guide Book

5. Operation Mode

•

Press the MODE button to select the type of operating mode.

•

For cooling only unit, the available modes are: COOL, DRY & FAN.

•

For heat pump unit, the available modes are: AUTO, COOL, DRY, FAN & HEAT.

6. Fan Speed Selection

•

Press the button until the desired fan speed is achieved.

7. On Timer Setting

•

Press the SET button will activate the on timer function.

•

Set the desired on time by pressing the SET button continuously. If the timer is set to 7.30am,

the air conditioner will turn on at 7.30 sharp.

•

Press the CLR button to cancel the on timer setting.

8. Off Timer Setting

•

Press the SET button will activate the off timer function.

•

Set the desired off time by pressing the SET button continuously.

•

Press the CLR button to cancel the off timer setting.

9. Automatic Air Swing (Optional)

•

Press the SWING button to activate the automatic air swing function.

•

To distribute the air to a specific direction, press the SWING button and wait until the louver

move to the desired direction and press the button once again.

10. Sleep Mode Setting

•

Press the button to activate sleep mode. This function is available under COOL, HEAT &

AUTO mode.

•

When it is activated in COOL mode, the set temperature will be increased 0.5°C after 30mins,

1°C after 1 hour and 2°C after 2 hours.

•

When it is activated in HEAT mode, the set temperature will be decreased 1°C after 30mins,

2°C after 1 hour and 3°C after 2 hours.

11. Clock Time Setting

•

Press button + or - to increase or decrease the clock time.

12. Turbo Function (Optional – Only Applicable To Inverter Unit)

•

Press button for fast cooling or heating operation.

•

The temperature will be increased internally if it is in the HEAT mode, decreased if in COOL

or DRY mode. Fan speed will be increased if it is not at maximum speed.

•

The temperature & fan speed will resume to user setting if the button is pressed again or after

20mins.

•

Available under HEAT, COOL & DRY modes only.

13

ASCON Service Guide Book

5.3 G12

Outlook

Operation Guide

1. “ON/OFF” Button

•

Press once to start the air conditioner unit.

•

Press again to stop the unit.

2. Temperature Setting

•

To set the desired room temperature, press ▲ the button to increase or ▼ button to decrease

then set temperature.

•

The temperature setting range is from 16°C to 30°C.

•

Press both buttons simultaneously to toggle and from ▲ °C to▼ °F setting.

3. Operation Mode

•

Press the MODE button to select the type of operating mode.

•

For cooling only unit, the available modes are: COOL ( ), DRY ( ) and FAN ( ).

•

For heat pump unit, the available modes are: AUTO, COOL ( ), DRY ( ), FAN ( ) and

HEAT ( ).

14

ASCON Service Guide Book

4. Fan speed selection

•

Press the button continuously will toggle the fan speed in the following order: Low ( ) –––:

Med ( ) –––: High ( ) –––: Auto

•

Stop pressing when the desired fan speed appears on the display screen.

5. ON Timer Setting

•

Press the SET button will activate the on timer function.

•

Set the desired on time by pressing the SET button continuously. If the timer is set to 7.30am,

the air conditioner will turn on at 7.30am sharp.

•

Press the CLR button to cancel the on timer setting.

6. OFF Timer Setting

•

Press the SET button will activate the off timer function.

•

Set the desired off time by pressing the SET button continuously.

•

Press the CLR button to cancel the off timer setting.

7. Automatic Air Swing

•

Press the SWING ( ) button to activate the automatic air swing function.

•

To distribute the air to a specific direction, press the SWING button and wait until the louver

move to the desired direction and press the button once again.

8. Sleep Mode Setting

•

Press the SLEEP button will activate the sleep mode function. This function is available under

COOL, HEAT and AUTO mode.

•

When the unit is operating under cooling mode, the set temperature is increased by 0.5°C

after 30 minutes, 1°C after an hour, and 2°C after 2 hours.

•

When the unit is operating under heating mode, the set temperature is decreased by 1°C after

30 minutes, 2°C after an hour and 3°C after 2 hours.

9. Clock Time Setting

•

Press + button to increase the clock time.

•

Press – button to decrease the clock time.

10. Turbo Mode

•

Press the TURBO ( ) button to achieve the required set temperature in a short time.

11. Ionizer

•

Press the Ionizer ( ) button to activate the negative Ion function, which will refresh the

indoor air effectively.

12. Personalize Setting

•

Press button and hold for 3s to initiate personalized setting

•

Set the individual setting e.g. MODE, SET TEMP or FAN SPEED and leave for 4s to save the

setting into the program.

•

2 groups of settings are allowed to store in the handset. Press once to activate the P1 setting,

press again to cycle between P1 and P2.

•

Press any key to deactivate the personalize setting.

15

ASCON Service Guide Book

5.3 G18

Outlook

Operation Guide

1. Transmission Source

•

The source where the signal will be transmitted.

2. Signal Transmission Indication

•

Blink to confirm that the last setting has been transmitted to the unit.

3. Temperature Setting

•

To set the desired room temperature, press the ▲ or ▼ button to increase or decrease

the set temperature.

•

Temperature setting range is from 16°C to 30°C (optional setting 20°C to 30°C).

4. Personalize Setting

•

Press and hold for 3s, then will blink. Press again to cycle between and .

•

Set the desire setting, then leave the handset for 4s without pressing any key and it will save

the setting into the program.

•

Press once to activate the P1 setting, press again to cycle between P1 and P2.

•

Press any key to deactivate the personalize setting.

16

ASCON Service Guide Book

5. Automatic Air Swing (optional)

•

Press the SWING button to activate the automatic air swing function.

•

To distribute the air to a specific direction, press the SWING button and wait until the

louver move to the desired direction and press the button once again.

6a. Silent Function (For WM – J Series only)

•

Press for quiet operation.

•

Fan speed turn to minimum speed.

•

Press again to deactivate the function.

6b. Ionizer Function (For WM - G series only)

•

Press button to activate the negative ion function, which will refresh the indoor air

effectively.

7. Sleep Mode Setting

•

Press the SLEEP button will activate the sleep mode function. This function is available under

COOL, HEAT and AUTO mode.

•

When the unit is operating under cooling mode, the set temperature is increased by 0.5°C

after 30 minutes, 1°C after an hour, and 2°C after 2 hours.

•

When the unit is operating under heating mode, the set temperature is decreased by 1°C after

30 minutes, 2°C after an hour, and 3°C after 2 hours.

8. Operating Mode

•

Press the MODE button to select the type of operating mode.

•

For cooling only unit, the available modes are: COOL ( ), DRY ( ) and FAN ( ).

9. Fan Speed Selection

•

Press the button continuously will toggle the fan speed in the following order:

Low Med High Auto

•

Stop pressing when the desired fan speed appears on the display screen.

10. “ON/OFF” Button

•

Press one to start the air conditioner unit.

•

Press again to stop the unit.

11. Timer Cancel

•

Press the TIMER CANCEL button to cancel the on timer setting.

12. OFF Timer Setting

•

Press the OFF TIMER button will activate the off timer function.

•

Set the desired off time by pressing the OFF TIMER button continuously.

13. ON Timer Setting

•

Press the ON TIMER button will activate the on timer function.

•

Set the desired on time by pressing the ON TIMER button continuously. If the timer is set to

7.30am, the air conditioner will turn on at 7.30am sharp.

14. Turbo Function

•

Press for fast cooling.

•

Fan speed turn to maximum speed.

•

Press again to deactivate the function.

15. Clock Time Setting

•

Press and hold to set the clock time.

17

ASCON Service Guide Book

1

2

3

4

5

6

7

8

9

10

11

12

13

5.4 GS02

Operation Guide

1. Transmission Source

•

The source where the signal will be transmitted.

2. Signal transmission indication

•

Blink to confirm that the last setting has been transmitted to the unit.

3. ON/OFF Button

•

Press once to start the air conditioner unit.

•

Press again to stop the unit.

4. Fan Speed selection

•

Press the button continuously will toggle the fan speed in the following order:

•

Stop pressing when the desired fan speed appears on the display screen.

18

ASCON Service Guide Book

5. Operation mode

•

Press the MODE button to select the type of operating mode.

•

For cooling only unit, the available modes are: COOL , DRY and FAN .

•

For heat pump unit, the available modes are: AUTO , COOL , DRY , FAN

and HEAT .

•

The AUTO mode is unavailable for chilled water system.

•

6. Automatic air swing

•

Press the SWING button to activate the automatic air swing function.

•

To distribute the air to a specific direction, press the SWING button and wait until the

louver move to the desired direction and press the button once again.

Swing mode selection method (for CK-E model)

•

Press SWING button for 4 seconds to enter field setting mode. While in field setting mode,

it will only show SWING MODE .

•

Press temperature and button to select SWING MODE rotation from Swing Mode 1 to

Swing Mode 3.

•

There are 3 different SWING MODE, which are:

Swing mode 1 Swing mode 2 Swing mode 3

SWING MODE will not activate unless SWING is activated. Swing is indicated by the logo:

•

If no mode changes within 4 seconds, unit will operate according to the selected SWING

MODE .

7. Turbo function (model dependent)

•

Press for fast cooling or heating operation.

•

Fan speed turn to maximum speed.

•

Press again to deactivate the function.

•

Available under HEAT, COOL and DRY modes only.

•

Any change of fan speed will deactivate this function.

•

The Turbo function is unavailable for chilled water system and remote control with

SWING MODE function.

•

8. OFF timer setting

•

Press the OFF TIMER CANCEL button will activate the off timer function.

•

Set the desired off time by pressing the OFF TIMER CANCEL button continuously.

•

Press the CANCEL button to cancel the off timer setting.

9. Quiet function (model dependant)

•

Press for quiet operation.

•

Fan speed turn to minimum speed.

•

Press again to deactivate the function.

•

Any change of fan speed will deactivate this function.

•

The Silent function is unavailable for chiller water system.

•

10. Clock time setting

•

Press and hold button to set the clock time.

11. ON timer setting

•

Press the ON TIMER CANCEL button will activate the on timer function.

•

Set the desired on time by pressing the ON TIMER CANCEL button continuously. If the timer

is set to 7.30am, the air conditioner will turn on at 7.30am sharp.

•

Press the CANCEL button to cancel the on timer setting.

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ASCON Service Guide Book

12. Sleep mode setting

•

Press the button will activate the sleep

mode function.

•

This is an energy saving option. When the unit

is operating under cooling mode, the set temperature is increased by 0.5°C after the first half an hour, another 0.5°C after the second half an hour and 1°C after the following 1 hour.

•

When the unit is operating under heating

mode, the set temperature is decreased by 1°C after the first half an hour, another 1°C after the second half an hour and 1°C after the following 1 hour.

•

This function is available under COOL, HEAT

and AUTO mode.

13. Temperature setting

•

To set the desired room temperature, press the ▲ or ▼ button to increase or decrease the

set temperature.

•

The temperature setting range is from 16°C to 30°C (Optional setting 20°Cto 30°C).

•

Press both buttons ▲ and ▼ simultaneously to toggle from °C to °F setting.

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ASCON Service Guide Book

1

2

3

4

5

6

8

9

10

11

12 1

3

5.5 APJ2

7

Operation Guide

1. Transmission Source

•

The source where the signal will be transmitted.

2. LCD Display

•

It displays the current settings.

•

(In this illustration, each section is shown with its displays on for the purpose of explanations)

3. ECONO button

•

ECON operation is a function which enables efficient operation by limiting the maximum

power consumption value.

•

This function is useful for cases which attention should be paid to ensure a circuit breaker will

not trip when the product runs along side other appliances.

•

Press button to start ECONO operation. The symbol is displayed on the LCD.

•

Press button to cancel ECONO operation. The symbol button disappears from

the LCD.

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ASCON Service Guide Book

4.

POWERFUL Button

•

POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode.

•

To start POWERFUL operation, press . POWERFUL operation ends in 20

minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation. is displayed on the LCD.

•

To cancel POWERFUL operation, press button again. disappears from the

LCD.

5. Temperature Settings.

•

It changes the temperature settings.

6. ON/ OFF button

•

Press this button once to start operation. Press again to stop it.

7. Mode Selector Button

•

It selects the operation mode (AUTO/ DRY/ COOL/ HEAT/ FAN).

•

Press MODE button to select operation mode. Each pressing of the button advances the

mode setting in sequence.

8. FAN Operation

•

To select the airflow rate setting.

•

5 levels of airflow rate setting from to plus & are available.

•

When the airflow is set to , the noise from the indoor unit will become quieter.

9. SWING Operation

•

To adjust the airflow direction

•

To start auto swing, press button and the symbol is displayed on the LCD.

•

The flap (horizontal blade) will begin to swing.

•

To set the flap at desired position, press button when the flap has reached the

desired position. The flap will stop moving. The symbol disappeared from the LCD.

10. COMFORT AIRFLOW Operation

•

When COMFORT is enable, the flow of air will be upward direction while in COOL operation

and in the downward direction while in HEAT operation, which will provide a comfortable wind that will not come in direct contact with people.

•

To start COMFORT AIRFLOW operation, press COMFORT button. The flap will change,

preventing air from blowing directly on the occupants of the room. The symbol is displayed on the LCD.

•

Air flow rate is set to AUTO. COOL/ DRY: The flap will go up. HEAT: The flap will go down.

•

To cancel COMFORT AIRFLOW operation, press COMFORT button again. The flap will

return to the memorized position before the COMFORT AIRFLOW operation.

•

The symbol will disappear from the LCD.

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ASCON Service Guide Book

11. ON TIMER Operation

•

To use ON TIMER operation, press button.

•

To cancel ON TIMER operation, press button. will disappear from the LCD.

12. OFF TIMER Operation

•

To use OFF TIMER operation, press button.

•

is displayed on the LCD. Each pressing of advances the time setting by 1 hour. The

•

To cancel OFF TIMER operation, press button. will disappear from the LCD.

13. CANCEL Button

•

It cancels the timer setting.

is displayed on the LCD. Each pressing of advances the time setting by 1 hour.

The timer can be set between 1 to 12 hours.

timer can be set between 1 to 9 hours.

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ASCON Service Guide Book

5.6 SLM3

Operation Guide

1. “ON/OFF” Switch

•

Press to start the air conditioner unit.

•

Press again to stop the unit.

2. Temperature Setting

•

Set the desired room temperature.

•

Press button to increase or decrease the set temperature.

•

Setting range are between 16°C to 30°C (60°F to 80°F).

3. Operation Modes

•

Press the “mode” button for select the type of operating mode.

- Cooling Only: COOL, DRY, FAN

- Heat Pump: AUTO, COOL, DRY, HEAT, FAN (AUTO mode is represented by both COOL and HEAT LED light on)

4. Fan Speed Selection

•

Press the button until the desired fan speed is achieved.

5. Timer

•

Press the set button to select the switch timer of the air conditioner unit (the setting range is

between1 to 10 hours).

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ASCON Service Guide Book

6. “SLEEP” Mode

•

Press button to activate the sleep function. This function can only be activated under “cool” or

heating mode operation. When it is activated under “cool” mode operation, the set temperature will increase 0.5°C after 30 minutes, 1°C after 1 hour and 2°C after 2 hours. If it is activated under “HEAT” mode operation, the set temperature will be decreased 0.5°C after 30 minutes, 1°C after 1 hour and 2°C after 2 hours.

7. Air Swing

•

Press button to activate the automatic air swing function.

8. Sensor

•

Infra red sensor to receive signals from wireless controller.

9. LED Display

•

To display the set temperature (in °C) and timer delay setting (in hours).

10. Transmission Source

•

To transmit signals to the air conditioner.

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ASCON Service Guide Book

5.7 Sequential Controller

Outlook

A : Time display B : Error indication C : Compressor running display (up to 4 compressors) D : Key lock display E : Heat display (up to 2 heaters) F : Energy saving mode display G : Compressor deforst cycle display (up to 4 compressors) H : Operation mode display I : Temperature set display

Operating Guide

1. “ON/OFF” Switch

•

Press once to start the air conditioning unit.

•

Press again to stop the unit.

•

The operation lamp next to the key lights up and goes off respectively when the unit is

running or not running.

• Caution:

stopped, the unit will not restart until 3 minutes later to protect the compressor.

2. Selecting Operating Mode

•

Press the

switches the operation over “

3. SAVE Mode

•

Press the

“

COOL

4. Auxiliary Electric Heater

•

If the “

setting (30°C), press the HEATER key to activate the auxiliary electric heater. For models with two heaters, consecutive press of the key allows the selection of one or both heaters active.

26

In the case when the

MODE

key to select the type of operating mode. Consecutive press of the key

SAVE

key to select the energy saving function. This option is only available for

”, “

HEAT

” and “

AUTO

HEAT

” mode provides insufficient heating to a room even at the highest temperature

ON/OFF

COOL

”, “

” modes.

key is pressed immediately after the operation is

HEAT

”, “

AUTO

” and “

FAN

”

ASCON Service Guide Book

5. Temperature Setting

•

To set the desired room temperature, press or to increase or decrease the

set temperature in the range of 16°C to 30°C.

•

Press both and simultaneously to toggle between °C and °F setting.

6. Time Setting

Real time clock

•

Press the

•

Press again to disable set clock mode.

•

Under set clock mode, the time of the present day can be set by pressing the respective

MINUTE, HOUR

7 days timer

•

Press the

respective conditioning unit is to automatically start running. Press setting.

•

Press the

respective conditioning unit is to automatically stop running. Press the setting.

•

Then to activate the 7 days timer, press and hold the

“TIMER ACTIVE” appears on the LCD screen. Repeat the same step to disable the 7 days timer.

7. Other Function

Key Lock

•

Press the

will appear on the LCD screen. At this point, only the ON/OFF key is valid.

•

To disable the key lock, again press the MINUTE key 3 times consecutively.

Test Run

•

Press the

CLOCK

ON TIMER MINUTE, HOUR

OFF TIMER

MINUTE, HOUR

MINUTE

TEST RUN

key once to activate set clock mode.

and

DAY

key.

key to activate autoON timer mode. Under this mode, press the

and

DAY

key to select the time of the week when the air-

ON TIMER

key to activate autoOFF timer mode. Under this mode, press the

and

DAY

key to select the time of the week when the air-

ON TIMER

TIMER ACTIVE

key 3 times consecutively to activate the key lock. A “KEY LOCK” symbol

key 2 times consecutively to test run the unit.

key again to save the

key until the word

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ASCON Service Guide Book

1

2

3

4 5

6

7

8

5.8 Netware 3

Outlook

1. Time display

2. Key lock display

3. Error indication

4. Fan speed display

5. Operation mode display

6. Sleep mode display

7. Air swing display

8. Temperature set display

Operating Guide

1. “ON/OFF” Switch

•

Press once to start the air conditioning unit.

•

Press again to stop the unit.

•

The operation lamp next to the key lights up and goes off respectively when the unit is

running or not running.

• Caution:

stopped, the unit will not restart until 3 minutes later to protect the compressor.

In the case when the

ON/OFF

key is pressed immediately after the operation is

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ASCON Service Guide Book

2. Selecting Operating Mode

•

Press the

switches the operation over “

3. Fan Speed Selection

•

Press the

4. Sleep Mode Setting

•

Press the

AUTO

•

When it is activated in

1°C after 1 hour and 2°C after 2 hours.

•

When it is activated in

2°C after 1 hour and 3°C after 2 hours.

5. Temperature Setting

•

To set the desired room temperature, press or to increase or decrease the

set temperature in the range of 16°C to 30°C.

•

Press both and simultaneously to toggle between °C and °F setting.

6. Air Swing

•

Press the

7. Time Setting

Real time clock

•

Press the

•

Press again to disable set clock mode.

•

Under set clock mode, the time of the present day can be set by pressing the respective

MINUTE, HOUR

7 days timer

•

Press the

respective conditioning unit is to automatically start running. Press setting.

•

Press the

respective conditioning unit is to automatically stop running. Press the setting.

•

Then to activate the 7 days timer, press and hold the

“TIMER ACTIVE” appears on the LCD screen. Repeat the same step to disable the 7 days timer.

8. Other Function

Key Lock

•

Press the

will appear on the LCD screen. At this point, only the ON/OFF key is valid.

•

To disable the key lock, again press the MINUTE key 3 times consecutively.

MODE

FAN

key until the desired fan speed is achieved.

SLEEP

mode.

SWING

CLOCK

ON TIMER MINUTE, HOUR

OFF TIMER

MINUTE, HOUR

MINUTE

key to select the type of operating mode. Consecutive press of the key

COOL

”, “

HEAT

”, “

AUTO

”, “

DRY

” and “

FAN

”

key to activate sleep mode. This function is available under

COOL

mode, the set temperature will be increased 0.5°C after 30mins,

HEAT

mode, the set temperature will be decreased 1°C after 30mins,

key to activate the automatic air swing function.

key once to activate set clock mode.

and

DAY

key.

key to activate autoON timer mode. Under this mode, press the

and

DAY

key to select the time of the week when the air-

ON TIMER

key to activate autoOFF timer mode. Under this mode, press the

and

DAY

key to select the time of the week when the air-

ON TIMER

TIMER ACTIVE

key 3 times consecutively to activate the key lock. A “KEY LOCK” symbol

key again to save the

COOL, HEAT

key again to save the

key until the word

&

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ASCON Service Guide Book

6.0 Controller Configuration

6.1 Auto Random Restart

•

Shorted at JH/JP1/J_LST jumper at main board for auto restart (supplied).

•

Remove the jumper to have non-auto restart.

D2.0

U1.5 / SQ2.0

L2.2 / L208A / LWS / W2

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ASCON Service Guide Book

6.2 Hot Keep Selection

Three selections available:

a. Fan stop if indoor coil temperature < 30°C (OFF). b. Fan runs at low speed if indoor coil temperature < 30°C and stop if indoor coil temperature <

18°C (ON).

c. Cycle of low fan running for 30s and fan off for 120s and repeat (INTERVAL).

WM – F/FR (U1.5 & L2EF) 3 selections available at the slide switch on the On/Off Switch Board; Preset at OFF.

Other models (U1.5) At CN3 location on the PCB,

i. Remove the connector to have (b) Fan ON and ii. Cut off the big resistor (12kOhm) to have (c) Fan INTERVAL

Non-ducted Model – standard setting is (a) Fan OFF Ducted Model – standard setting is (C) Fan INTERVAL

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ASCON Service Guide Book

L2 Models

Two selections are available: a. Fan ON:

- If the indoor coil temperature > 40°C, the indoor fan will run at speed.

- If the indoor coil temperature crosses 37°C, the indoor fan willrun at low speed.

- if the indoor coil temperature <18°C, the indoor fan will stop.

b. Fan OFF

- If the indoor coil temperature >40°C, the indoor fan will run at set speed.

- If the indoor coil temperature crosses 37°C, the indoor fan willrun at low speed.

- If indoor coil temperature <30°C, the indoor fan will stop.

L208A / LWS2.0 models

There are 2 tables setting for HT_KP & MODEL jumpers as shown as below.

HT_KP & MODEL Jumpers

For L208A jumper setting

MODEL HT_KP

Pin 1&2 MS ON Pin 2&3 INTVL OFF

Open ALWY ON -

For LWS2.0 jumper setting

MODEL HT_KP Pin 1&2 Single ON Pin 2&3 Tandem OFF

Open DX INTVL

Software Type Jumper

Tandem WSHP

LWS2.0

L208A DX

Single WSHP

DX

The above table is the summary of the jumpers setting for both LWS2.0 and L208A. For example, WSHP single compressor with Fan ON for hot keep selection: Place the shunt jumpers on HT_KP (Pin 1 & 2) & MODEL (Pin 1& 2).

32

Hotkeep Selection

Fan On Fan Off Interval Always On Multisplit

MODEL Pin 2 & 3 Pin 2 & 3 Pin 2 & 3 X X

HT_KP Pin 1 & 2 Pin 2 & 3 Open X X

MODEL Pin 1 & 2 Pin 1 & 2 Pin 1 & 2 X X

HT_KP Pin 1 & 2 Pin 2 & 3 Open X X

MODEL Open Open Open X X

HT_KP Pin 1 & 2 Pin 2 & 3 Open X X

MODEL Open Open Pin 2 & 3 Open Pin 1 & 2

HT_KP Pin 1 & 2 Pin 2 & 3 Open Open Open

ASCON Service Guide Book

6.3 Auxiliary Heater Conversion

U1.5 Heatpump with Auxiliary Heater

To convert the standard U1.5 heatpump PCB to with auxiliary heater application, the following components need to be added onto the PCB.

1. Heater relay

2. Transistor

3. Diode

RLY 8

Transistor 2SC945

SB125 Heatpump with Auxiliary Heater

Q3

Relay 20A / 240V

Diode IN4003

D17

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ASCON Service Guide Book

Relay

To convert SB125 heatpump PCB to auxiliary heater application, you need only one heater relay as shown below:

1. Place the JM relay on the RY_HTR location

2. Solder all the relay pins.

SB125 Heatpump without Auxiliary heater

SB125 Heatpump with Auxiliary Heater

240V/ 20A

Re

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ASCON Service Guide Book

W2 Heatpump with Auxiliary heater

To convert SB125 heatpump PCB to auxiliary heater application, you need the following components to be added onto the PCB:

1. Shunt jumper

2. JM Relay 240VAC/ 20A

Step 1:Place the shunt jumper at jumper header M2.

Step 2:-

1. Place the JM relay at RY_HTR location

2. Solder all the relay pins

W2 Heatpump with Auxiliary Heater

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ASCON Service Guide Book

6.4 Multi Split Conversion

Cooling Only Model (L2.0 / L208A) The cooling only model WM-G, CK-A/B/C/E, CE-E, CC-C which are using L2 control board can be switched to multi split units without any modification needed.

Heatpump Model (L2.0) WM-GR The Multi Split mode can be selected at the slide switch on the On/Off Switch Board; Preset at OFF. The outdoor coil sensor has to be removed from the PCB as the reading is taken from the outdoor PCB directly.

MMOOVVEE TTHHIISS SSWWIITTCCHH TTOO SSEELLEECCTT MMUULLTTII SSPPLLIITT ((MMSS)) FFUUNNCCTTIIOONN..

Heatpump Models (L208A) CK-AR/BR/CR/ER, CE-ER, CC-CR (L208A)

The multisplit can be selected by using shunt jumper and short jumper header MODEL_KP between pin 1 & 2 as the picture shown below. The outdoor coil sensor has to be removed from the PCB as the reading is taken from the outdoor PCB directly.

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ASCON Service Guide Book

6.5 Sequential Controller

It is allowed to configure the controller to suit individual’s need with details below:

1. Models For each type, there are 3 models for the control to configure into.

Dip switch 1 Dip switch 2 Dip switch 5 a. Cooling (SQCn) Off Off Off b. Heatpump + no heater (SQHn0) On Off Off c. Heatpump + 1 heater (SQHn1) Off On Off d. Heatpump + 2 heater (SQHn2) On On Off e. Auto heatpump + no heater (SQHn0) On Off On f. Auto heatpump + 1 heater (SQHn1) Off On On g. Auto heatpump + 2 heater (SQHn2) On On On

n denotes number of compressor(s) where the postfix number indicates number of compressor(s).

2. Stage Differential Temperature Differential temperature is the temperature difference between turning on or off 1 compressor to another compressor in thermostat cycle. The stage differential temperature can be selected from the range shown below:

Dip switch 3 Dip switch 4 a. Default Off Off b. 0.5°C On Off c. 1.0°C Off On d. 1.5°C On On

Note that 1.5°C only valid for 2 and 3 compressors model. For 4 compressors model, maximum allowed is 1.0°C.

The default differential temperature is base on number of compressor model, the setting is as below:

Model Diff. Temperature 1 compressor Not. Applicable 2 compressors 0.5°C 3 compressors 1.0°C 4 compressors 1.5°C

3. Hot Keep Option

Dip switch 6 a. Fan off Off b. Fan on On

45. Operating Modes The system has 4 operating modes to select with respect to each model selection:

Model Auto Cool Heat Fan SQCn - X - X SQHnh - X X X (Dip switch 5 = off) SQHnh X X X X (Dip switch 5 = on)

Where x denotes modes available n = number of compressor(s) h = number of heater(s)

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ASCON Service Guide Book

5. Last Memory Functions The power up settings for either with or without the last memory backup is based on the J_LST setting.

J_LST Setting a. Last memory backup J_LST Plugged b. Without last memory backup J_LST Removed

6. Summary of Models available

SQCn Cooling Only model SQHnh Heatpump model

n = number of compressors: 2, 3, 4 h = number of heaters: 0, 1, 2

Factory preset (default setting)

Model SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 SQCn OFF OFF OFF OFF OFF OFF OFF OFF SQHnh ON ON OFF OFF ON ON OFF ON

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ASCON Service Guide Book

Start

2 seconds

Indoor fan

Outdoor fan 1

15 seconds

Outdoor fan 2

Outdoor fan 3

Outdoor fan 4

2 seconds

2

seconds

2 seconds

Compressor 1*

Compressor 2*

Compressor 3*

Compressor 4*

Start

2 seconds

Indoor fan

Outdoor fan 1

15 seco

nds

15 seconds

Outdoor fan 2

Outdoor fan 3

Outdoor fan 4

2 seconds

Compressor 1*

Compressor 2*

Compressor 3*

Compressor 4*

2 seconds

All 4 way valves

15 seconds

Heater 1*

15 seconds

Heater 2*

7. Sequential Control for Cool Mode ask Tan CS The starting sequence for indoor fan, outdoor fan and compressors is shown as below:

*If available and applicable The compressors will be turned on one by one depending on the on/off conditions shown in the above.

8. Sequential Control for Heat Mode The starting sequence for indoor fan, outdoor fan and compressors is shown as below:

*If available and applicable The compressors will be turned on one by one depending on the on/off conditions shown in the above.

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ASCON Service Guide Book

Rework instruction:

9. Conversion from Old Sequential Board to New Sequential Board

(For wiring up to 1000 meters)

9.1 Sequential Main Board SQMB01 (Old Version)

SQMB01 (Main Board) from old version to new version Step 1: Remove Jumper J1 and J2. Step 2: Add Part: 2051-MAX1483 IC :MAX1483 to U8

9.2 Sequential Main Board SQMB01 (New Version)

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ASCON Service Guide Book

Part: 2051

-

MAX1483 IC

:MAX1483

Jumper J1 and

J2 removed

9.3 Sequential Main Board SQMB01 (New Version)

9.4 Sequential LCD Panel SQ-LCD (New Version)

SQLCD (LCD Panel) from old to new Step 1: Remove Jumper: J1, J2 Step 2: Add Chip Resistor. 1/10W 5% 200K to R8, R9, R10 Step 3: Add Part: 1000000030 IC: SMD MAX1483CSA to U4

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ASCON Service Guide Book

6.6 Chilled Water Fan Coil Unit (W1V3)

The standard W1V3 board comes with a VALVE jumper. The system can be configured as the jumper selection listed below:

VALVE jumper HEAT jumper Heatpump Mode & Valve Application Heatpump Mode & Valveless Application X Cooling Mode & Valve Application Cooling Mode & Valveless Application X X

√

: Jumper Remained X : Jumper Removed

VALVE & HEAT Jumper Location

Model: WM 05-25FW

1. VALVE jumper is plugged into JVLV connector on the emergency switchboard.

2. HEAT jumper is plugged into JMODE connector on the emergency switchboard.

Model: CK 20-50AW, CK 15-25BW, CK 10-20CW, CE 20-50DW and CC 10-60CW

1. VALVE jumper is plugged into JVLV connector on the main board.

2. HEAT jumper is plugged into the OD connector on the main board.

√

X

√ √

VALVE Jumper.

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ASCON Service Guide Book

M4

6.7 Chilled Water Fan Coil Unit (W2.0)

The system model can be configured via the following jumpers. For each model selected, the permissible operating modes are as follows:

Jumper Configuration Model Operating Modes

M1 2 Pipes without Aux. Heater 1 Heat>Cool>Dry>Fan M2 2 Pipes with Aux. Heater 2 Heat>Cool>Dry>Fan M3 4 Pipes + Boiler 3 Heat>Cool>Dry>Auto>Fan M4 4 Pipes + Boiler 4 Heat>Cool>Dry>Fan

The standard W2 board comes with a VALVE jumper. The system can be configured as the jumper selection listed below:

VALVE jumper HEAT jumper Heatpump Mode & Valve Application Heatpump Mode & Valveless Application X Cooling Mode & Valve Application Cooling Mode & Valveless Application X X

√

: Jumper Remained X : Jumper Removed

VALVE & HEAT Jumper Location

1. VALVE jumper is plugged into JVLV connector on the emergency switchboard.

2. HEAT jumper is plugged into JMODE connector on the emergency switchboard.

√

X

M1 M2 M3

√ √

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ASCON Service Guide Book

6.8 U1.5  L208A Conversion

All single split indoor units with U1.5 PCB cannot be directly by the new L208A PCB because of the following:ACK/A5CK-A/AR & ACK/A5CK-C/CR U1.5PCB - The connector on the PCB (CN6) for the inter-connector cable has 16 pins. L208A PCB - The connector on the PCB (CN5 & CN6) for the inter-connector cable have 12 & 2 pins.

ACM/A5CM-D/DR & ACM/A5CM 062C/CR U1.5 PCB - The connector on the PCB (CN6) for the assy. LED cable has 16 pins L2 08A PCB - The connector on the PCB (CN5) for the assy. LED cable has 12 pins.

L2 Spare parts can be ordered via e-Distributors website under Spare Parts Ordering. The part number is PI-C-00094.

The L2 Spare Parts Package contains the following items:-

1. L2 08A Heat Pump PCB.

2. Room sensor, indoor coil sensor inter-connector wire, outdoor coil sensor inter-connector wire.

3. Inter-connector cable from main board to MCK-A/AR panel.

4. Inter-connector cable from main board to MCK-C/CR panel.

5. Intermediate board with 2 sets of cables, which is stick on the main board.

6. Inter-connector cable from main board to MCM-D/DR assy. LED board.

7. Inter-connector cable from main board to MCM 062C/CR assy. LED board.

Remarks The intermediate board with 2 sets of cables, which is stick on the L208A PCB (Item 1 & 5) is ONLY applicable for ACM/A5CM-D/DR and ACM 062C/CR models with originally using U1.5 PCB.

Item 3

Item 1 & 5

Item 6

Item 4

Item 7

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ASCON Service Guide Book

Display Panel

board

6.9 WMF U1.4 to L2EF Conversion

1. The U1.4 PCB can be replaced directly by the new L2EF PCB because no modification needs to be done and the connector pins for both stepper motor and fan motor is still the same as U1.4.

3. However, the display panel (IR receiver) and On/Off switch board pins on PCB for both U1.4 and L2EF is not compatible with each other; therefore it is unable to change only the display panel or On/Off switch board from U1.4 to L2EF or L2EF to U1.4.

5. For example, if the display panel for U1.4 is malfunction, it cannot be replaced by the display panel from L2EF as the connector pins is already different. Please refer to the following pictures for a clear description of connector pins.

ON/ OFF switch board

U1.4 PCB

L2EF PCB

comes with display panel and ON/OFF switch board

Display Panel

45

ON/ OFF switch

ASCON Service Guide Book

/

TIMER

SLEEP

POWER

DRY

/ ON ON or OFF

BLINKING

7.0 Service Diagnosis

7.1 Self Diagnosis Table

Wall Mounted F Series Cooling Only Model

Model Board Handset WM 10/15/20/25F, 311 D2.0 G8

LED Indicator Light Display

LED Light Diagnosis Table

Timer On

Operation / Faulty Indication

Continuously

Once every 2 sec

Twice every 2 sec

3 times every 2 sec

Sleep mode On

Dry mode

Defrost mode

Room air sensor contact loose / short

Indoor coil sensor contact loose / short

Gas leak

46

ASCON Service Guide Book

/

/ ON ON or OFF

BLINKING

Wall Mounted F Series Heat Pump Model

Model Board Handset WM 10/15/20/25FR, 301R U1.5 G8

LED Indicator Light Display

LED Light Diagnosis Table

COOL (Green)

HEAT / FAN (Red / Green)

DRY (Orange)

SLEEP (Red)

Operation / Faulty Indication

Cooling mode

Dry mode

Fan mode

Heating mode

Auto mode in heating operation

Auto mode in cooling operation

Defrost mode

Compressor overload protection

Indoor coil sensor contact loose / short

Outdoor coil sensor contact loose / short

Room air sensor contact loose / short

Gas leak

47

ASCON Service Guide Book

TIMER Mode

SLEEP Mode

POWER ON

DRY MODE

/

/ ON ON or OFF

BLINKING

Wall Mounted F Series Cooling Only Model

Model Board Handset WM 07/10/15/20/25F L2EF G8

LED Indicator Light Display

LED Indication Lights: Normal Operation and Faulty Indication Table

Timer On

Operation / Faulty Indication

Continuously

Once every 2 sec

Twice every 2 sec

3 times every 2 sec

Sleep mode On

Dry mode

Frost Prevention Mode

Room air sensor contact loose / short

Indoor coil sensor contact loose / short

Outdoor abnormal operation

48

ASCON Service Guide Book

/

/ ON

ON or OFF

BLINKING

Wall Mounted F Series Heatpump Model

Model Board Handset WM 07/10/15/20/25FR, 311/301R

LED Indicator Light Display

COOL Mode (Green)

L2EF G8

DRY Mode (Orange)

HEAT / FAN

Mode

(Red / Green)

SLEEP Mode (Red)

The heat pump unit is equipped with “auto mode”, whereby the unit will provide reasonable room temperature by switching the unit automatically to either “cool” mode or “heat” mode, according to the temperature setting set by the user,

LED Indicator Lights: Normal Operation and Faulty Indication Table

Operation / Faulty Indication

Cooling mode

If the system is in auto or sleep mode, switch to heat or cool mode and

turn OFF the sleep function, turn OFF the power supply to reset the system, wait for 3 minutes and ON the system again.

If the system is in cool or heat mode (with the sleep function OFF), the

sensor may have contact problem, compressor overload protection trip or gas leak.

Dry mode

Fan mode

Heating mode

Auto mode in heating operation

Auto mode in cooling operation

Defrost mode

Compressor overload protection

Indoor coil sensor contact loose / short

Outdoor coil sensor contact loose / short

Room air sensor contact loose / short

49

ASCON Service Guide Book

ON ON or OFF

BLINKING

SLEEP

TIMER

COO

L / HEAT

IONIZER

Wall Mounted G Series Model

Model Board Handset WM 10/15/20/25G/GR L2.2 G18 / SLM3 / Netware 3

LED Indicator Light Display

LED Light Diagnosis Table

COOL/HEAT

(GREEN/RED)

Green

Red

Green

Operation / Faulty Indication

Cooling mode

Heating mode

Auto mode in heating operation

Auto mode in cooling operation

Timer On

1 time

3 times

2 times

Sleep mode On

Ionizer On

Fan mode On

Dry mode On

Room air sensor contact loose / short

Outdoor coil sensor contact open

Indoor coil sensor contact open

Compressor overload protection /

Indoor coil sensor short /

1 time

Red

3 times

6 times

Outdoor coil sensor short

Defrost mode

Gas leak

Hardware error (tact switch pin short)

50

ASCON Service Guide Book

Wall Mounted J Series Model

Model Board Handset WM 09/15J/JR L2GSN G18

Led Indicators Light Display

Sleep

Cool/ Heat

Timer

LED Indoor lights: Normal Operation and Fault Conditions for Cooling/ Heat Pump Unit

(GREEN/RED)

Green

Red

Green

Error Code Operation / Faulty Indication

- Cooling mode

- Heating mode

- Auto mode in heating operation

- Auto mode in cooling operation

- Timer On

1 time

3 times

2 times

1 time

Red

3 times

6 times

- Sleep mode On

- Fan mode On

- Dry mode On

Blink E1 Room air sensor contact loose / short

Blink E3 Outdoor coil sensor contact open

Blink E2 Indoor coil sensor contact open

Blink E4

Compressor overload / Indoor coil sensor short / Outdoor coil sensor short

- Defrost operation

Blink E5 Gas leak

Blink E8 Hardware error (tact switch pin short)

4 times

Blink E9 No Feedback from indoor fan

5 times

Blink EE EEPROM defrost

Note: The unit will not detect sensor missing when the compressor is ON.

ON

ON/ OFF

Blinking

51

ASCON Service Guide Book

SLEEP

TIMER

POWER

TIMER

POWER

HEAT

ON ON or OF

F BLINKING

Ceiling Cassette A / B / C Series Model

Model Board Handset CK 20/25/30/40/50A/AR U1.5 G8 / SLM3 / Netware 3 CK 15/20/25B/BR U1.5 G8 / SLM3 / Netware 3 CK 10/15/20C/CR U1.5 G8 / SLM3 / Netware 3

LED Indicator Light Display - Cooling

LED Indicator Light Display – Heating

LED Light Diagnostic Table

Operation / Faulty Indication

Continuously

Once every 3 sec

Twice every 3 sec

3 times every 3 sec

4 times every 3 sec

Cooling mode

Timer On

Sleep mode On

Heating mode

Frost prevention mode

Compressor overload protection

Pump fault

Gas leak

Room / indoor / outdoor coil sensor contact loose / short

52

ASCON Service Guide Book

SLEEP

TIMER

POWER

TIMER

POWER

HEAT

ON ON or OFF

BLINKING

Ceiling Cassette A / B / C/ E Series Model

Model Board Handset CK 20/25/30/40/50A/AR L208A G18 / SLM3 / Netware 3 CK 15/20/25B/BR L208A G18 / SLM3 / Netware 3 CK 10/15/20C/CR L208A G18 / SLM3 / Netware 3 CK 20/25/28/40/50E/ER L208A G18

LED Indicator Light Display - Cooling

LED Indicator Light Display – Heating

LED Light Diagnostic Table

Operation / Faulty Indication

Cooling mode

Timer On

Sleep mode On

Heating mode

Auto mode in cooling operation

Auto mode in heating operation

Compressor overload protection /

1 time

2 times

3 times

1 time

2 times

3 times

Indoor coil sensor short / Outdoor coil sensor short

Pump fault

Gas leak

Room air sensor contact loose / short

Indoor coil sensor contact open

Outdoor coil sensor contact open

53

ASCON Service Guide Book

FAN DRY COOL

HEAT

FAN DRY COOL

ON ON or OFF

BLINKING

Ceiling Exposed D Series Model

Model Board Handset CE 20/25/30/40/50D/DR U1.5 G8 / SLM3 / Netware 3

LED Indicator Light Display - Cooling

LED Indicator Light Display – Heating

LED Light Diagnostic Table

Operation / Faulty Indication

Cooling mode

Dry mode

Fan mode

Heating mode

Auto mode in cooling operation

Auto mode in heating operation

Defrost mode

Compressor overload protection

Gas leak

Outdoor coil sensor contact open / short

Indoor coil sensor contact open / short

Room air sensor contact loose / short

54

ASCON Service Guide Book

FAN DRY COOL

HEAT

FAN DRY COOL

ON ON or O

FF BLINKING

Ceiling Exposed D / E Series Model

Model Board Handset CE 20/25/30/40/50D/DR L208A G18 / SLM3 / Netware 3 CE 15/20/25/28E/ER L208A G18 / SLM3 / Netware 3

LED Indicator Light Display - Cooling

LED Indicator Light Display – Heating

LED Light Diagnostic Table

Operation / Faulty Indication

Compressor overload protection /

Cooling mode

Dry mode

Fan mode

Heating mode

Auto mode in cooling operation

Auto mode in heating operation

Indoor coil sensor short / Outdoor coil sensor short

Gas leak

Outdoor coil sensor contact open

Indoor coil sensor contact open

Room air sensor contact loose / short

55

ASCON Service Guide Book

Seven Segment Display – SLM3 / Netware 3

Model Board Handset WM 10/15/20/25FR, 301R U1.5 SLM3 / Netware 3 CK 20 - 50A/AR U1.5 SLM3 / Netware 3 CK 15 - 25B/BR U1.5 SLM3 / Netware 3 CK 10 - 20C/CR U1.5 SLM3 / Netware 3 CE 20 - 50D/DR U1.5 SLM3 / Netware 3 CC 10 - 60C/CR U1.5 SLM3 / Netware 3

Cooling / Heat pump Model

Seven Segments Faulty Indication

E1 blinking Room air sensor contact loose / short

E2 blinking Indoor coil sensor contact loose / short

E3 blinking Outdoor coil sensor contact loose / short

E4 blinking Compressor overload protection

E5 blinking Gas leak

E6 blinking Pump fault*

HEAT LED blinking Defrost mode (SLM3 only)

*Applicable for Ceiling Cassette Model only.

Model Board Handset WM 10/15/20/25G/GR L2.0 SLM3 / Netware 3 CK 20 - 50A/AR L208A SLM3 / Netware 3 CK 15 - 25B/BR L208A SLM3 / Netware 3 CK 10 - 20C/CR L208A SLM3 / Netware 3 CE 20 - 50D/DR L208A SLM3 / Netware 3 CE 15 - 28E/ER L208A SLM3 / Netware 3 CC 10 - 60C/CR L208A SLM3 / Netware 3 CC 30 - 100D/DR L208A SLM3 / Netware 3

Cooling / Heat pump Model

Seven Segments Faulty Indication

E1 blinking Room air sensor contact loose / short

E2 blinking Indoor coil sensor contact open

E3 blinking Outdoor coil sensor contact open

E4 blinking

E5 blinking Gas leak

E6 blinking Water Pump fault*

E7 blinking Outdoor coil sensor exist (Multi-split model)

E8 blinking Hardware error (tact switch pin short)

LO Room temperature below 8ºC(46 ºF)

HI Room temperature above 37ºC(99 ºF)

OP Working room sensor is open

SH Working room sensor is short

*Applicable for Ceiling Cassette Model only.

56

Compressor overload protection / Indoor coil sensor short / Outdoor coil sensor short

ASCON Service Guide Book

Ducted Blower B/C/D/ER Series Model – Single Compressor Rooftop Packaged Air Conditioner – Single Compressor

Model Board Handset SB 75 – 100B/BR L208A SLM3 SB 75 – 100D L208A SLM3 SB 75 – 100ER L208A SLM3 SB 125 – 150B/BR U1SB125 SLM3 SB 125CR U1SB125 SLM3 SB 125 – 150D U1SB125 SLM3 SB 125 – 150ER U1SB125 SLM3

RT 55 – 120A/AR U1SB125 SLM3

Seven Segment Display – SLM3

Seven Segments Faulty Indication

E1 blinking Room air sensor contact loose / short

E2 blinking Indoor coil sensor contact open

E3 blinking Outdoor coil sensor contact open

Compressor overload protection /

E4 blinking

E5 blinking Gas leak

Model Board Handset SB 75 – 100B/BR L208A SLM3 SB 75 – 100D L208A SLM3 SB 75 – 100ER L208A SLM3 SB 125 – 150B/BR SB125 SLM3 SB 125CR SB125 SLM3 SB 125 – 150D SB125 SLM3 SB 125 – 150ER SB125 SLM3

RT 55 – 120A/AR SB125 SLM3

Seven Segment Display – SLM3

Indoor coil sensor short / Outdoor coil sensor short

Seven Segments Faulty Indication

E1 blinking Room air sensor contact loose / short

E2 blinking Indoor coil sensor contact open

E3 blinking Outdoor coil sensor contact open

E4 blinking

E5 blinking Gas leak

57

Compressor overload protection / Indoor coil sensor short / Outdoor coil sensor short

ASCON Service Guide Book

Ducted Blower B/D/ER Series Model – Multi Compressors Rooftop Packaged Air Conditioner – Multi Compressors

Model Board Handset SB 150B2/BR2 – 600B4/BR4 SQ2.0 SQ-LCD SB 125D2 – 500D4 SQ2.0 SQ-LCD SB 125ER2 – 600ER4 SQ2.0 SQ-LCD

RT 150 – 420A/AR SQ2.0 SQ-LCD

Error Code When the system is on and an error occurs, the ON/OFF LED on the LCD panel will blink and an error code is shown. When the system is off and there is a thermistor error, the ON/OFF LED is off but the error code is still displayed. Each error code represents different message as below:

Error

Code

E01

E02

E03

E04

E05

E06

E07

E08

E09

E10

E11

E12

E13

E14 Room sensor short E32 Compressor 1 de-ice

E15 Room sensor open E33 Compressor 2 de-ice

E16 Indoor coil sensor 1 short E34 Compressor 3 de-ice

E17 Indoor coil sensor 2 short E35 Compressor 4 de-ice

E18 Indoor coil sensor 3 short

Faulty Indication

Require manual reset (possible causes) Compressor 1 high temperature (overload) Compressor 2 high temperature (overload) Compressor 3 high temperature (overload) Compressor 4 high temperature (overload) Compressor 1 high pressure trip / contact open Compressor 2 high pressure trip / contact open Compressor 3 high pressure trip / contact open Compressor 4 high pressure trip / contact open Compressor 1 trip / low refrigerant / outdoor abnormal Compressor 2 trip / low refrigerant / outdoor abnormal Compressor 3 trip / low refrigerant / outdoor abnormal Compressor 4 trip / low refrigerant / outdoor abnormal

Error Code

E19 Indoor coil sensor 4 short

E20 Indoor coil sensor 1 open

E21 Indoor coil sensor 2 open

E22 Indoor coil sensor 3 open

E23 Indoor coil sensor 4 open

E24 Outdoor coil sensor 1 short

E25 Outdoor coil sensor 2 short

E26 Outdoor coil sensor 3 short

E27 Outdoor coil sensor 4 short

E28 Outdoor coil sensor 1 open

E29 Outdoor coil sensor 2 open

E30 Outdoor coil sensor 3 open

E31 Outdoor coil sensor 4 open

Faulty Indication

58

ASCON Service Guide Book

/

ON ON or OFF

BLINKING

/

Wall Mounted F Series Inverter-X Model

Model Board Handset WMX 10/15FR VA2.0 G18

LED Indicator Light Display

LED Light Diagnosis Table

COOL / DRY

HEAT

Stand-by / Fan

TIMER

Operation / Faulty Indication

Cooling mode

Dry mode

Stand-by / Fan mode

Heating mode

Auto mode

Defrost mode

Compressor overload protection

Indoor temperature sensors contact loose / short

Outdoor temperature sensor contact loose / short

Gas leak / compressor overheat

Communication error between indoor and outdoor

Inverter error / PFC error

59

Outdoor total current trip / DC peak

Indoor fan feedback error

ASCON Service Guide Book

ON ON or OFF

BLINKING

SLEEP

TIMER

COOL / HEAT

IONIZER

Wall Mounted G Series Inverter-X Model

Model Board Handset WMX 10/15/20/25G/GR VA2.0 G18

LED Indicator Light Display

LED Light Diagnosis Table

Heating mode/ Standby mode (only for

Communication error between indoor and

COOL/HEAT

(GREEN/RED)

Green

Red

Orange

Red

Green

Operation / Faulty Indication

Cooling mode

heat pump model)

Auto mode in operation

Timer On

Sleep mode On

Ionizer On

Fan mode On

Dry mode On

Defrost mode

Indoor temperature sensor loose / short

Coil temperature sensor loose / short

Outdoor temperature sensor loose / short

Compressor overload protection

IPM / PFC error

Outdoor total current trip / DC peak

Compressor overheat / gas leak

Indoor fan feedback error

outdoor

60

ASCON Service Guide Book

SLEEP

TIMER

POWER

TIMER

POWER

HEAT

ON ON or OFF

BLINKING

Ceiling Cassette A/C Series Inverter-X Model

Model Board Handset CKX 20/25A/AR VA3.0 G18 CKX 10/15/20C/CR VA3.0 G18

LED Indicator Light Display - Cooling

LED Indicator Light Display – Heating

LED Light Diagnostic Table

Operation / Faulty Indication

1 time

2 times

3 times

4 times

5 times

6 times

Cooling mode

Timer On

Sleep mode On

Heating mode

Defrost mode

Indoor temperature sensor loose / short

Outdoor temperature sensor loose / short

Communication error

Compressor overload protection

Pump fault

Compressor overheat / gas leak

Outdoor over current

IPM / PFC / Partial switching

61

ASCON Service Guide Book

FAN DRY COOL

HEAT

FAN DRY COOL

ON ON or OFF

BLINKING

Ceiling Convertible E Series Inverter-X Model

Model Board Handset CEX 15/20/25E/ER VA3.0 G18

LED Indicator Light Display - Cooling

LED Indicator Light Display – Heating

LED Light Diagnostic Table

Operation / Faulty Indication

1 time

2 times

3 times

4 times

5 times

6 times

Cooling mode

Dry mode

Fan mode

Heating mode

Defrost mode

Indoor temperature sensor loose / short

Outdoor temperature sensor loose / short

Communication error

Compressor overload protection

Pump fault

Compressor overheat / gas leak

Outdoor over current

IPM / PFC / Partial switching

62

ASCON Service Guide Book

Seven Segment Display

Model Board Handset WMX 10 – 25G/GR VA3.0 SLM3 CKX 20 – 25A/AR VA3.0 SLM3 CKX 10 – 20C/CR VA3.0 SLM3 CEX 15 – 25E/ER VA3.0 SLM3 CCX 10 – 25C/CR VA3.0 SLM3

Cooling / Heat pump Model

Seven Segments Faulty Indication

E1 blinking Indoor temperature sensor loose / short

E2 blinking Outdoor temperature sensor loose / short

E3 blinking Communication error

E4 blinking Compressor overload protection

E5 blinking Pump fault

E6 blinking Compressor overheat / gas leak

E7 blinking IPM / PFC / Partial switching

E8 blinking Outdoor over current

E9 blinking Indoor fan feedback error

63

ASCON Service Guide Book

Outdoor discharge sensor error

Inverter - X Outdoor Unit

Model Board SLX 10/15/20/25C/CR VB2.0 MSV 25/35A VB2.0 MSX 20/25/30A/AR VB2.0

Normal running / compressor running RED LED blinking

No. of Blinks Blinking Indication

1 Normal running, with no limitation

2 Voltage limit

3

4 Total current limit

5 Discharge temperature limit

6 Cooling unit: indoor coil temperature limit

7 Indoor fan control

8 Outdoor frequency adjustment

Compressor stopped Error Indication

No. of Blinks No. of Blinks

Faulty Indication

Red Yellow

Cooling unit: outdoor coil temperature limit Heating unit: indoor coil temperature limit

Red Yellow

Faulty Indication

0 1 Outdoor ambient sensor error 1 5 DC fan motor feedback error

0 2 Outdoor coil sensor error 1 6 AC peak current error

0 3

0 4 DC compressor feedback error 1 8 None

0 5 Communication error 1 9 DC compressor speed control error

0 6 Over current error 2 0 None

0 7 No load 2 1 Outdoor suction pipe A sensor error

0 8 Over / under voltage 2 2 Outdoor suction pipe B sensor error

0 9 DC compressor start failure 2 3 Outdoor suction pipe C sensor error

1 0 Cooling overload 2 4 Outdoor suction pipe D sensor error

1 1 Defrost 3 1 Communication error with indoor A

1 2 IPM protection 3 2 Communication error with indoor B

1 3 Read EEPROM error 3 3 Communication error with indoor C

1 4 Write EEPROM error 3 4 Communication error with indoor D

/ compressor overheat

1 7 Outdoor suction sensor error

64

ASCON Service Guide Book

Chilled Water Fan Coil Unit

Model Board Handset WM 05 – 25FW, 301W W1V3 G8 / SLM3 / Netware 3 CK 20 – 50AW/AWH W1V3 G8 / SLM3 / Netware 3 CK 15 – 25BW W1V3 G8 / SLM3 / Netware 3 CK 10 – 20CW W1V3 G8 / SLM3 / Netware 3 CE 20 – 50DW/CBW W1V3 G8 / SLM3 / Netware 3 CC 10 – 60CW W1V3 SLM3 / Netware 3 SB 75 – 150BW N/A No Controller

Self Diagnostic Table – W1V3 Fault Indication POWER LED / COOL LED Other LEDs Seven Segments Room sensor missing Blinks 4 times FAN blinks E1 blinking Indoor coil sensor missing Blinks 4 times SLEEP blinks E2 blinking Pump fault Blinks 2 times COOL & FAN blink E6 blinking Pipe water temperature poor Blinks 3 times COOL & DRY blink E4 blinking Pipe water temperature fault Blink 1 time COOL blinks E5 blinking

Model Board Handset WM 07 – 25GW W2 G18 / SLM3 / Netware 3 WM 301W W2 G18 / SLM3 / Netware 3 CK 20 – 50AW/AWH W2 G18 / SLM3 / Netware 3 CK 15 – 25BW W2 G18 / SLM3 / Netware 3 CK 10 – 20CW W2 G18 / SLM3 / Netware 3 CE 07 – 15CBW W2 G18 / SLM3 / Netware 3 CE 20 – 50DW W2 G18 / SLM3 / Netware 3 CE 15 – 25EW W2 G18 / SLM3 / Netware 3 CC 10 – 60CW W2 SLM3 / Netware 3 SB 75 – 150BW N/A No Controller

Self Diagnostic Table – W2 Fault Indication COOOL LED Seven Segments Room sensor error (short/open) Blink 1 time E1 Pipe water sensor error (short/open) Blink 2 times E2 Water pump error Blink 6 times E6 Pipe water temperature fault Blink 5 times E5 Window open activated* Blink 3 times Antifreeze mode activated* Blink 7 times Load shedding activated* Blink 8 times *Applicable for 4 pipes applications only.

65

ASCON Service Guide Book

ON ON or OFF

BLINKING

SLEEP

TIMER

COOL / HEAT

IONIZER

Wall Mounted G Series Model – Water Source Split Unit

Model Board Handset 5WMWS 10/15/20/25GR LWS2.0 G18 / SLM3 / Netware 3

LED Indicator Light Display

LED Light Diagnosis Table

COOL/HEAT

(GREEN/RED)

Green

Red

Green

Operation / Faulty Indication

Cooling mode

Heating mode

Auto mode in heating operation

Auto mode in cooling operation

Timer On

Red

Sleep mode On

Ionizer On

Room air sensor contact loose / short Outdoor coil sensor contact loose / short

Indoor coil sensor contact open

Compressor overload protection Gas leak

Defrost mode

66

ASCON Service Guide Book

TIMER

POWER

HEAT

ON ON

or OFF

BLINKING

Ceiling Cassette A / B / C Series Model – Water Source Split Unit

Model Board Handset 5CKWS 20/25/30/40/50AR LWS2.0 G18 / SLM3 / Netware 3 5CKWS 10/15/20CR LWS2.0 G18 / SLM3 / Netware 3

LED Indicator Light Display – Heating

LED Light Diagnostic Table

Operation / Faulty Indication

1 time

2 times

3 times

1 time

2 times

3 times

Cooling mode

Timer On

Heating mode

Auto mode in cooling operation

Auto mode in heating operation

Compressor overload protection

Pump fault

Gas leak

Room air sensor contact loose / short

Indoor coil sensor contact loose / open

Outdoor coil sensor contact loose / open

67

ASCON Service Guide Book

Seven Segment Display – SLM3 / Netware 3 (Water Source Split Unit)

Model Board Handset 5WMWS 10/15/20/25GR LWS2.0 SLM3 / Netware 3 5CKWS 20 - 50A/AR LWS2.0 5CKWS 10 - 20C/CR LWS2.0 5CCWS 10 - 60C/CR LWS2.0

Cooling / Heat pump Model

Seven Segments Faulty Indication

E1 blinking Room air sensor contact loose / short

E2 blinking Indoor coil sensor contact loose

E3 blinking Outdoor coil sensor contact loose

Compressor overload protection /

E4 blinking

E5 blinking Gas leak

E6 blinking Pump fault*

HEAT LED blinking Defrost mode (SLM3 only)

*Applicable for Ceiling Cassette Model only.

Indoor coil sensor short / Outdoor coil sensor short

SLM3 / Netware 3 SLM3 / Netware 3 SLM3 / Netware 3

68

ASCON Service Guide Book

Inverter-Y Model Indoor Series

Model Board Handset A5WMY 10/15/20/25 JR G18 A5CKY 10/15/20CR A5CKY 20/25/28/40/50 ER A5CEY 62 CR A5CEY 20/25/28/40/50 ER A5CCY 20/25/28/38/50/60 CR

G18

G18/ GS02

GS02 G18/ GS02 G18/ GS02

LED Indicator Lights: Normal Operation and Fault Conditions for Heat Pump Unit

COOL/HEAT

(GREEN/RED)

Green

Red

Green

Red

Operation / Faulty Indication

Cooling mode

Heating mode

Auto mode in heating operation

Auto mode in cooling operation

Time Off (when unit is on)

Time On (when unit is off)

Sleep mode on

Fan mode on

Dry Mode on

Defrost operation

Error indication

ON Blinking

69

ASCON Service Guide Book

Display Section

Inverter-Y Model Indoor Series

Error Code Diagnosis by Wireless Handset G18

Temperature

MODE Button

ON TIMER Button

ON/OFF Button

TIMER CANCEL Button OFF TIMER Button

Diagnosis Step

1. Hold down TIMER CANCEL button for 5 seconds, a “ ” indication flashes on the temperature display section.

2. Press TIMER CANCEL repeatedly until indoor buzzer produces a long beep. This indicates the error code, refers to Error Codes table and is displayed on the temperature display section.

3. A short beep or two consecutive beeps indicate non-corresponding error codes.

4. To cancel the error code display, hold down TIMER CANCEL button for 5 seconds. Alternatively, the code display will cancel itself if the button is not pressed for 1 minute.

Seven Segment Display – Netware 3

Model Board Handset ACKY 10/15/20CR CKY 20/25/28/40/50 ER CEY 62 CR CEY 20/25/28/40/50 ER CCY 20/25/28/38/50/60 CR

Netware 3 Netware 3 Netware 3 Netware 3 Netware 3

70

ASCON Service Guide Book

Error Codes

Error

Codes

U0 Insufficient gas

U2 DC voltage out of range U4 Communication error

U7

UA Installation error

UF

UH Anti-freeze function in other room

A1 Indoor PCB error A3 Water pump error

A5 Antifreeze

A6 Indoor fan motor abnormal

C4

C9 Indoor room thermistor short/ open

E1 E3 E4 E5 E6 E7 E8 E9 EA

Error Description

0 Normal F6 Heat exchanger overheat

Signal transmission error (on outdoor unit PCB)

Communication Error (indoor and outdoor) piping and wiring

Indoor heat exchanger thermistor short/ open

Outdoor PCB error High pressure protection Low pressure protection Compressor motor lock Compressor start-up error Outdoor DC fan motor lock Ac input over current EXV error 4-way valve error Discharge pipe overheat

F3

Error

Codes

H0

H3 High pressure switch error H6 Position sensor abnormality

H8 AC current sensor error

H9 Outdoor air thermistor short / open

LC

L1 L3 L4 L5 L8 L9 P1 P4 PJ

Error Description

Compressor sensor system abnormality

J1 Pressure sensor error

Compressor discharge pipe

J3

thermistor short /open / misplaced

J5 Suction pipe thermistor short/ open J6 Outdoor heat exchanger

Subcooling heat exchanger thermistor

J7

short/ open

J8 Liquid pipe thermistor short/ open

J9 Gas pipe thermistor abnormality

Communication error (control PCB and inverter PCB)

Outdoor PCB error Electrical box temperature rise Heat sink overheat IPM error / IGBT error Electrical thermal switch Stall prevention Open phase or voltage unbalance Heat sink thermistor short / open Capacity setting error

71

ASCON Service Guide Book

Single Split Inverter – Y Model Outdoor Unit

Model Board Handset A5LCY 10/15/20/25 DR W_2_03A A5LCY 30/40/50/60 DR W_2_03A

G18 G18

Error code diagnosis by Outdoor 7-segment Display

In the Y-series model, the 7-segment display section on the outdoor unit indicates the following:

1. Unit running parameters

2. Error codes

Unit Condition Display on 7-segment Unit in normal operating mode

Unit is in fault

Unit Running Parameter

Parameter

Number

00 Compressor actual rotation r/s 01 Compressor target rotation r/s 02 Dc bus voltage VDC 03 Total current (x10) A 04 Outdoor air temperature °C 05 Outdoor heat exchanger temperature °C 06 Compressor discharge temperature °C 07 Outdoor heat sink temperature °C 08 Indoor air temperature °C 09 Indoor heat exchanger temperature °C 10 EXV Opening Pulse 11 Outdoor fan speed W0-W6 12 Horse power 15: 1.5hp 13 Software Version (Production) 14 Software version (development) 15 3 minutes count up stop timer 16 Communication stage 0-3 17 Indoor On/ Off 0-OFF, 1-ON 18 Delta D 19 Running mode 0-Fan, 1-Heat, 2-Cool 20 Start up timer 21 Comp initial control flag ok 22 Fuzzy control Delta H 23 Comp freq set pointer 24 Comp stop pointer 25 Comp limit pointer 26 Comp limit speed Max r/s 27 Discharge high temp zone 0-Normal, Other-Active 28 High pressure zone 0-Normal, Other-Active 29 Current control zone 0-Normal, Other-Active 30 Oil return status 0-Normal, Other-Active

Parameter Description Unit/ Range

1. Flashes the compressor running frequency for up to 30 minutes after first start-up/ tact switch is pressed.

2. Subsequently, press on the tact switch to return to the above display.

3. Flashes up to 11 running parameters when tact switch is pressed in the sequence corresponding to the parameter number (refer to Unit Running Parameter Table).

1. Flashes unit error code (similar to wireless handset)

2. Flashes up to 11 running parameters when tact switch is pressed in the sequence corresponding to the parameter number (refer to Unit Running Parameter Table).

Parameter Description Unit/ Range

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ASCON Service Guide Book

Parameter

Number

31 De-ice setting 0-Normal, Other-Active 32 Dew drop setting 0-Normal, Other-Active 33 Heat sink protection zone 0-Normal, Other-Active 34 Turbo setting 0-Normal, Other-Active 35 Silent setting 0-Normal, Other-Active 36 Low ambient zone 0-Normal, Other-Active 37 Defrost status 0-Normal, Other-Active 38 Pump down status 0-Normal, Other-Active 39 O/D output flag 0-Comp off, 1-Comp ON 40 O/D output capacity In % 41 Target discharge temp 42 EXV control status 0-Initial, 1-Feedback 43 Indoor fan tap 44 O/D error code 45 I/D error code 46 Low voltage control zone 0-Normal, Other-Active 47 Gas leak detection 0-Normal, Other-Active 48 Discharge sensor disconnected 0-Normal, Other-Active 49 Official test setting 0-Normal, Other-Active 50 Skip frequency flag 0-Normal, Other-Active 51 Last O/D error code 52 2nd last O/D error code 53 3rd last O/D error code

Error Code Diagnosis by Unit Last State Memory

1. Remove battery from remote controller

2. Replace battery again into remote controller

3. Press Mode & ON/OFF buttons together

4. Press Mode button to 5:00

5. Press ON/OFF once

6. Repeat the fault diagnosis steps by wireless handset G18

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ASCON Service Guide Book

Multi Split Inverter – Y Outdoor Unit

Model Board Handset A5MSY 25/30 BR

G18

Error code diagnosis by Outdoor 7-segment Display

The outdoor unit LED indicates the running condition of the system:

LED INDICATION

Green Red

A 1 2 3 4

◑ ● ● ● ●

◑ ● ● ● ○ ◑ ● ● ○ ● ◑ ● ● ○ ○ ◑ ● ○ ● ○ ◑ ● ○ ○ ●

◑ ● ○ ○ ○ ◑ ○ ● ● ●

◑ ○ ● ● ○ ◑ ○ ● ○ ● ◑ ○ ● ○ ●

◑ ○ ● ○ ○

◑ ○ ○ ● ●

◑ ○ ○ ● ○ ◑ ○ ○ ○ ● ◑ ○ ○ ○ ○

◑

Blinks

●

Off

○

On

NORMAL

INSTALLATION ERROR

ANTIFREEZE (OTHER ROOMS)

HEAT SINK OVERHEAT

IPM ERROR / IGBT ERROR

INSUFFICIENT GAS

AC INPUT OVER CURRENT

COMPRESSOR START-UP ERROR COMMUNICATION ERROR (OUTDOOR CONTROL PCB AND IPM

PCB) 4 WAY VALVE ERROR

DC VOLTAGE OUT OF RANGE

COMPRESSOR MOTOR LOCK / COMPRESSOR OVERLOADED

DISCHARGE PIPE OVERHEAT ANTIFREEZE (COOLING) / HEAT EXCHANGER OVERHEAT

(HEATING) HEAT EXCHANGER OVERHEAT

COMPRESSOR SENSOR SYSTEM ERROR

COMPRESSOR FEEDBACK DETECTION ERROR

AC CURRENT SENSOR ERROR

OUTDOOR AIR THERMISTOR SHORT/OPEN COMPRESSOR DISCHARGE PIPE THERMISTOR SHORT / OPEN /

MISPLACED OUTDOOR HEAT EXCHANGER THERMISTOR SHORT/ OPEN

LIQUID PIPE THERMISTOR SHORT/ OPEN

GAS PIPE THERMISTOR SHORT/OPEN

HEAT SINK THERMISTOR SHORT / OPEN

OUTDOOR CONTROL BOX OVERHEAT

OUTDOOR PCB ERROR

OUTDOOR DC FAN MOTOR LOCK

Description

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ASCON Service Guide Book

Wall Mounted K-Series Inverter-Y model

Model Board Handset A5WMY 10/15 KR

Indoor LED Indication

2P206569-4

APJ2

The operation lamp flashes when any of the following errors is detected.

1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation.

2. When a signal transmission error occurs between the indoor and outdoor units.

Error code diagnosis conducted by Wireless Handset APJ2

The wireless handset can receive a corresponding error code from the indoor unit.

1. When is held down for 5 seconds, a indication blinks on the temperature display section.

2. Press repeatedly until a continuously beep is produced.

The code indication changes in the sequence shown below, and notifies with a long beep.

CATEGORY CODE DESCRIPTION

00 NORMAL

UA INDOOR-OUTDOOR UNIT COMBINATION FAULT

SYSTEM

INDOOR

UNIT

U0 REFRIGERANT SHORTAGE U2 DROP VOLTAGE OR MAIN CIRCUIT OVERVOLTAGE

FAILURE OF TRANSMISSION (BETWEEN INDOOR UNIT AND OUTDOOR

U4 A1 INDOOR PCB DEFECTIVENESS A5 HIGH PRESSURE CONTROL OR FREEZE-UP PROTECTOR A6 FAN MOTOR FAULT C4 FAULTY HEAT EXCHANGER TEMPERATURE SENSOR C9 FAULTY SUCTION AIR TEMPERATURE SENSOR

UNIT)

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ASCON Service Guide Book

CATEGORY CODE DESCRIPTION

EA COOLING-HEATING SWITCHING ERROR E1 CIRCUIT BOARD FAULT E5 OL STARTED E6 FAULTY COMPRESSOR START UP E7 DC FAN MOTOR FAULT E8 OVERCURRENT INPUT F3 HIGH TEMPERATURE DISCHARGE PPE CONTROL

F6 HIGH PRESSRUE CONTROL (IN COOLING)

OUTDOOR

UNIT

Note:

1. A short beep and 2 consecutive beeps indicate non-corresponding codes.

H0 SENSOR FAULT H6 OPERATION FAULT DUE TO FAULTY POSITION DETECTION SENSOR H8 DC CURRENT SENSOR FAULT H9 FAULTY SUCTION AIR TEMPERATURE SENSOR

J3 FAULTY DISCHARGE PIPE TEMPERATURE SENSOR

J6 FAULTY HEAT EXCHANGER TEMPERATURE SENSOR L3 ELECTRICAL PARTS HEAT FAULT L4 HIGH TEMPERATURE AT INVERTER CIRCUIT HEATSINK L5 OUTPUT OVERCURRENT P4 FAULTY INVERTER CIRCUIT HEATSINK TEMPERATURE SENSOR

2. To cancel the code display, hold the down for 5 seconds. The code display also cancels itself if the button is not pressed for 1 minute.

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ASCON Service Guide Book

Multi Digital Scroll Indoor Units

Model Board Handset AWMD 09/10/15/20/25 G MC201-C G18 ACKD 20/25/30/40/50 A MC201-C G18 ACKD 10/15/20 C MC201-C ACCD 10/15/20/25/30/40/50/60 C MC201-C MC301 ACMD 20/25/28 E MC201-C G18 ACMD 40/50 D MC201-C G18 ACMD 62 C MC201-C G18 ADBD 80/100 MC201-A MC301 A5WMD 09/10/15/20/25 G MC201-C G18 A5CKD 20/25/30/35/40/50 A MC201-C G18 A5CKD 10/15/20 C MC201-C A5CCD 10/15/20/25/30/40/50/60 C MC201-C MC301 A5CMD 20/25/28 E MC201-C G18 A5CMD 40/50 D MC201-C G18 A5CMD 62 C MC201-C G18 ADBD 80/100 MC201-A MC301

G18

Indoor Error Code

Error Diagnosis by Indoor Unit LED Indicator

ITEM TYPE HEAT SLEEP/ FAN DRY

1 Indoor Sensor Error

2 Indoor Pump Error

3 Communication Error

4 Outdoor Sensor Error

5 Compressor Overload

6 Pressure Switch Trip

7 Pressure Sensor Error

8 System Failure

9 Others

● ● ◑

●●●●

◑

●●●●

◑ ● ●

●●●●

◑ ◑ ◑ ● ● ◑ ● ◑ ◑ ◑ ○ ◑

◑◑◑◑

◑

◑ ○ ○

● OFF ○ ON ◑ Blinking

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ASCON Service Guide Book

Error Diagnosis by Wired Controller (MC301)

ITEM CODE DESCRIPTION

1 E0 System malfunction 2 E1 Sensor Broken (TH1 discharge Temp.) 3 E2 Sensor Broken (TH2 inlet coil 1#) 4 E3 Sensor Broken (TH3 mid coil 1#) 5 E4 Sensor Broken (TH4 inlet coil 2#) 6 E5 Sensor Broken (TH5 mid coil 2#) 7 E6 Sensor Broken (TH6 inlet coil 3#) 8 E7 Sensor Broken (TH7 mid coil 3#)

9 E8 Sensor Broken (TH8 ambient temp) 10 E9 Sensor Broken (TH9 outlet coil) 11 EA Sensor Broken (TH10 subcool outlet) 12 EB Sensor Broken (TH11 subcool suction) 13 EC Sensor Broken (TH12 suction) 14 EF Emergency Run 15 F0 Outdoor Storage Malfunction 16 F1 Sensor Broken (indoor inlet coil) 17 F2 Sensor Broken (indoor mid coil) 18 F3 Sensor Broken (indoor outlet coil) 19 F4 Sensor Broken (indoor return air) 20 F5 Sensor Broken (indoor supply air) 21 F6 Indoor and controller communication malfunction 22 F7 Ambient temp exceed the limit 23 F8 4WV malfunction 24 F9 Refrigerant leakage 25 FA Controller storage malfunction 26 FB Water Pump (indoor water pump) 27 FC Indoor and outdoor communication malfunction 28 FE Outdoor master and slave communication malfunction 29 H0 Digital comp overload 30 H1 Fixed Comp1 overload 31 H2 Fixed Comp2 overload 32 H3 Fixed Comp3 overload 33 H4 High pressure too high 34 H5 Sensor broken, high pressure 35 H6 Discharge temp too high 36 L0 Super heat too low 37 L1 Low pressure too low 38 L2 Sensor broken, low pressure 39 10 System malfunction 40 11 Sensor broken (slave TH1 discharge temp) 41 12 Sensor broken (slave TH2 inlet coil 1#) 42 13 Sensor Broken (slave TH3 mid coil 1#) 43 14 Sensor broken (slave TH4 inlet coil 2#) 44 15 Sensor broken (slave TH5 mid coil 2#) 45 16 Sensor broken (slave TH6 inlet coil 3#) 46 17 Sensor broken (slave TH7 mid coil 3#) 47 18 Sensor broken (slave TH8 ambient temp) 48 19 Sensor broken (slave TH9 outlet coil) 49 1A Sensor broken (slave TH10 subcool outlet) 50 1B Sensor broken (slave TH11 subcool suction) 51 1C Sensor Broken (slave TH12 suction) 52 1F Emergency run (slave) 53 20 Outdoor storage (slave) 54 27 Ambient temp exceed the limit (slave) 55 28 4WV malfunction (slave) 56 29 Refrigerant leakage (slave) 57 30 Digital comp overload (slave) 58 31 Fixed comp1 overload (slave) 59 32 Fixed comp2 overload (slave) 60 33 Fixed comp 3 overload (slave) 61 34 High pressure too high (slave) 62 35 Sensor broken, high pressure (slave) 63 36 Discharge temp too high (slave) 64 40 Super heat too low (slave) 65 41 Low pressure too low (slave) 66 42 Sensor broken, low pressure (slave)

78

ASCON Service Guide Book

Multi Digital Scroll Outdoor Units

Model Board Handset AMDS 30/40/50/60/70 A/AR - G18/ MC301 AMDS 80/100/120/150/180/200/240/

- G18/ MC301 260/300/320 B/BR A5MDS 80/100/120/140/160/180/

-

G18/ MC301 200/220/240/260/280/300/320/340/360 /380/400/420/440/460/480/500 B/BR

Outdoor Error Code

Error code diagnosis by PCB four Digit 7-Segment

MDS Outdoor A Series Error Code

ITEM CODE DESCRIPTION 1 E0 Discharge temperature sensor malfunction 2 E1 Outdoor ambient temperature sensor malfunction 3 E2 Suction temperature sensor malfunction 4 E3 Compressor base temperature sensor malfunction 5 E4 Coil inlet temperature sensor malfunction 6 E5 Coil middle temperature sensor malfunction 7 E6 Coil outlet temperature sensor malfunction 8 E7 9 E8 General system failure 10 H1 High pressure trip 11 H2 Digital scroll compressor overload 12 H3 Fixed scroll compressor overload 13 L1 Low pressure trip 14 C- Communication failure between outdoor and all indoors 15 CX “X” indoor no. particular indoor no communication

Compressor discharge temperature too high > 130⁰C

MDS Outdoor B Series Error Code

ITEM CODE DESCRIPTION ITEM CODE DESCRIPTION

0 EC00 00## indoor unit communication 62 EC62 Refrigerant released

1 EC01 01# indoor unit communication failure 63 EC63 Slaver outdoor unit communication

2~47 …. 02~47# indoor unit communication

failure

48 ER48 Digital Compressor Overload 65 ER65 TH2 temperature sensor failure

49 ER49 Fix 1 Compressor Overload 66 ER66 TH3 temperature sensor failure

50 ER50 Fix 2 Compressor Overload 67 ER67 TH4 temperature sensor failure

51 ER51 Fix 3 Compressor Overload 68 ER68 TH5 temperature sensor failure

52 ER52 Discharge pressure too high 69 ER69 TH6 temperature sensor failure

53 ER53 Suction pressure is too low 70 ER70 TH7 temperature sensor failure

54 ER54 Outdoor unit’s IC error 71 ER71 TH8 temperature sensor failure

55 ER55 System Error 72 ER72 TH9 temperature sensor failure

56 ER56 Discharge temperature is too high 73 ER73 TH10 temperature sensor failure

57 ER57 - 74 ER74 TH11 temperature sensor failure

58 ER58 4 way valve failure 75 ER75 TH12 temperature sensor failure

59 ER59 Ambient temperature is beyond the limit 76 ER76 Discharge pressure sensor failure

60 ER60 Emergency run 77 ER77 Suction pressure sensor failure

61 ER61 Subheating is beyond the limit 78 ER78 All indoor units Communication Failure

64 ER64 TH1 temperature sensor failure

failure

For item 0-47, the last two characters indicate which indoor has communication problem.

79

ASCON Service Guide Book

7.2 General Check

When any air conditioner malfunction is noted, immediately switch off the power supply to the unit and contact the local dealer if necessary.

Problem Symptom Check Item Suggested Action The unit does not work

Fan does not work

Fan work, but compressor does not work

Air conditioner work but cooling not satisfactory

The air flow is too low

light is dim

Check the power supply Check to make sure that the rated

voltage is supplied. Check the fuse Check and replace the fuse. Check the remote controller timer setting Check the power supply Check to make sure that the rated

Check the fan motor capacitor Check and replace the capacitor. Check the fan motor Check and replace the fan motor. Check the switch Check and change the switch. Check if the thermostat setting too high Check the compressor capacitor Check and replace the capacitor. Check the compressor Check and replace the compressor. Check the compressor contactor Check and replace the contactor. Check if the thermostat setting too high Check if the condenser coil dirty Clean the condenser coil. Check the condenser installation condition

Diagnosis by service port pressure and operating Current Check the air filter Check and make sure the air filter is

Check the fan / blower condition Check and make sure that the fan /

Check the battery

Make sure the delay timer is set

correctly.

voltage is supplied.

Reset thermostat.

Make sure the condenser is installed

according to factory’s

recommendation.

Check for insufficient refrigerant.

clean.

blower are in good condition.

Check and replace the battery. The remote controller

Make sure the batteries are correctly

inserted.

80

ASCON Service Guide Book

7.3 General Troubleshooting Guide

By means of pressure readings

.

Pressure Probable Cause

Data

Circuit

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

Too Low

1. Overcharged with refrigerant.

1. Poor compression / no compression

1. Undercharged with refrigerant.

1. Outdoor fan blocked (cooling).

1. Air intake temperature of indoor unit too

A Little Low

Normal

A Little High

Too High

2. Non-condensable gases in refrigerant circuit (eg. Oil)

3. Obstructed air-intake / discharge.

4. Short circuit of hot air at condensing unit.

(compressor defective).

2. Check valve stick in open position.

3. Reversing valve leaking (for heatpump

only).

2. Refrigerant leakage.

3. Air filter clogged / dirty (indoor unit).

4. Indoor fan locked (cooling).

5. Defective defrosts control, outdoor coil freeze up (heating).

6. Outdoor fan locked (heating).

2. Outdoor coil dirty (cooling).

3. Indoor fan locked (heating).

4. Indoor filter clogged dirty (heating).

high.

81

ASCON Service Guide Book

Evaporator fan

contactor

Evaporator fan

contactor

Evaporator fan

contactor

evaporator fan

Unit Power

No voltage or low voltage

phase

Components shorted

Components loose

High or

low voltage

Wrong / missing phase

Coil burned

Contact faulty

Faulty fan motor

Defective operation

Stop

Repair the power line

components

Get the right voltage

Repair the contact

By means of diagnostic flows chart:

Generally, there are two kinds of problems, i.e. starting failure and insufficient cooling/ heating. “Starting failure” is caused by electrical defect while improper application or defects in refrigerant circuit causes “insufficient cooling/ heating”.

i) Diagnosis of Electric circuit

: Faulty : Check : Cause : Remedy

NO cooling/ heating (Unit fail to start)

Evaporator

fan motor

Get the right voltage

supply

Fuse for

operation

circuit

Over current

relay for

Wrong phase/ missing

Repair or replace the

Tighten the connections

Check the power supply to the motor: repair when necessary

Change the contactor

Repair or change the motor

Repair or change the switch

Get the right voltage

82

Wrong/ missing phase

2 1

Check the power supply to the motor: repair when necessary

ASCON Service Guide Book

Coil burnt

Change the contactor

Change the conta

cts

Repair or change if necessary

Change the contactor

Change the compressor

Correct the wiring

Condenser

fan contactor

Contact faulty

Fan motor faulty

Other electrical component faulty

Compressor

contactor

Contact faulty

Open compressor windings

Fan motor faulty

The most common causes of air conditioner failure to ‘start’ are:

a) Voltage not within ± 10% of the rated voltage. b) Power supply interrupted c) Improper control settings d) Air conditioner is disconnected from main power source e) Fuse blown or circuit breaker off.

Repair or change the motor contactor

Change the contacts

83

ASCON Service Guide Book

Calculation

High Cooling

load

Circuit

Clean the coil

Clean the filter

Remove the obstruction

Restricted

ii) Diagnosis of Refrigerant Circuit/ Application

There might be some causes where the unit starts to run but does not perform satisfactorily, i.e. insufficient cooling. Judgement could be made by measuring temperature difference of indoor unit’s intake and discharge air as well as running current.

: Faulty : Check : Cause : Remedy

Insufficient cooling

Indoor/ outdoor dirty

Air

(clogged)

Indoor air filter dirty

Refrigerant

Fan motor malfunction

Obstruction at air inlet/ outlet of indoor/ outdoor unit

Excessive heat source e.g. electric kettle.

Room overcrowded with people

Windows/ doors wide open

Refrigerant short charge or refrigerant leakage

Restriction e.g. at strainer, capillary, filter, dryer, etc.

Change or repair the motor

Remove or reduce heat

Reduce number of people in the room

Close the windows/ doors

Add refrigerant Repair leakage if detected

Repair clogging or replace faulty components

Compressor

Satisfactory operation with temperature difference of air intake & discharge of indoor unit 8ºC to 13ºC.* (* Value is for reference only)

84

Less or no compression (Low running current)

Repair compressor

ASCON Service Guide Book

Calculation

High Heating

load

Circuit

Clean the coil

Clean the filter

Remove the obstruction

Restricted

Insufficient Heating

Air

Indoor/ outdoor dirty (clogged)

Indoor air filter dirty

Refrigerant

Fan motor malfunction

Obstruction at air inlet/ outlet of indoor/ outdoor unit

Excessive heat source e.g. electric kettle.

Room overcrowded with people

Windows/ doors wide open

Refrigerant short charge or refrigerant leakage

Restriction e.g. at strainer, capillary, filter, dryer, etc.

Change or repair the motor

Remove or reduce heat

Reduce number of people in the room

Close the windows/

Add refrigerant Repair leakage if detected

Repair clogging or replace faulty components

Compressor

Less or no compression (Low running current)

Satisfactory operation with temperature difference of air intake & discharge of indoor unit 14ºC to 20ºC.* (* Value is for reference only)

85

Repair compressor

ASCON Service Guide Book

Mini Chiller: Troubleshooting Guide

When any malfunction is occurred, immediately switch off the power supply to the unit, and contact the local dealer, if necessary. Some simple troubleshooting tips are given below: Symptoms Possible Causes Remedial Action

1. Compressor does not start

2. Fan does not start

3. Air conditioning does work, but insufficient cooling

•

No power supply

•

Fuses blown or automatic

circuit breakdown open

•

Defective contactor or coil

•

Unit is stopped because a

safety has tripped

•

Loose wires

•

Compressor faulty

•

No power supply

•

Fan motor faulty

•

Thermostat setting too high

•

Condenser coil dirty

•

Obstacle blocking air inlet or

outlet of the unit

•

Insufficient refrigerant in the

system

•

Improper water flow rate

•

Water in the system is

contaminated

•

Check power supply

•

Look for short circuit or

grounded wires in motor

windings Replace fuses and reset circuit breakers when the fault has been corrected Check tightness and soundness of all electrical connection

•

Repair or replace

•

Determine the type of safety

shut down and correct the unit is restarted

•

Check wire connection and

tighten terminal screw

•

Contact local dealer

•

Check power supply

•

Contact local dealer

•

Reset thermostat

•

Contact local dealer

•

Remove the obstacle

•

Contact local dealer

•

Contact local dealer

•

Contact local dealer

86

ASCON Service Guide Book

Rooftop: Troubleshooting Guide

Before you ask for repair service, check the following points Symptoms Switch Box

(Field Supply)

It does not run Switch (ON)

Air flow out but it does not cool enough

Cool air does not come out

Fan runs but compressor does not run

Compressor run but stops immediately

Water or steam is discharged from the unit

Switch (ON)

Possible Causes Troubleshooting

•

Power failure

•

The power supply is

turned OFF

•

The fuse in the power

supply is gone

•

The earth leakage

breaker is gone

•

The wiring phase of

power supply is mistaken

•

Improper temperature

adjustment

•

The filter is filled with dust

and dirt

•

There are some obstacles

at the air inlet and outlet of the units

•

Windows and doors are

open

•

The restart-preventing

circuit is in operation for 3 minutes

•

The set temperature of

thermostat is too high

•

The room temperature is

excessively low for cooling

•

Air outlet and inlet are

blocked

•

At cooling, water which

places to cooling piping and piping connection part drops

•

Press the switch (ON)

button after power restoration.

•

Turn the power supply ON

•

Replace the fuse

•

Put in the earth leakage

breaker

•

Modify the wiring phase of

power supply

•

After checking the set

temperature and inlet temperature adjust thermostat (23WA)

•

Clean the filter

•

Remove the obstacle

•

Close the windows and

doors

•

Wait for a while (to protect

the compressor, a 3 minutes restart-preventing circuit is built into the unit. Therefore, there are occasions sometimes when the compressor does not start running immediately. There are cases when it does not run for as long as 3 minutes)

•

For temperature control,

decrease the set temperature at cooling

•

Can not be operated as it is

out of temperature control range

•

Remove blocking matter

•

It is not a breakdown.

Please use it as it is

87

ASCON Service Guide Book

Appendix

Resistance – Temperature Characteristics

Type DTN-C1 03F3H-OYL 1128, 1148, 1158 Material Name 3H Resistance R25=10.000kΩ + 1.0% - 1.0% B Value B25/30=3450K + 1.0% - 1.0%

t°C Rmin (kΩ) Rnom (kΩ) Rmax (kΩ) t°C Rmin (kΩ) Rnom (kΩ) Rmax (kΩ)

-10 4.42E+01 4.53E+01 4.65E+01

-8 4.02E+01 4.12E+01 4.22E+01 42 5.28E+00 5.37E+00 5.45E+00

-6 3.66E+01 3.74E+01 3.83E+01 44 4.92E+00 5.01E+00 5.09E+00

-4 3.33E+01 3.41E+01 3.49E+01 46 4.59E+00 4.67E+00 4.76E+00

-2 3.04E+01 3.11E+01 3.18E+01 48 4.29E+00 4.37E+00 4.42E+00

0 2.78E+01 2.84E+01 2.90E+01 50 4.01E+00 4.09E+00 4.16E+00

2 2.54E+01 2.59E+01 2.65E+01 52 3.75E+00 3.82E+00 3.90E+00

4 2.33E+01 2.37E+01 2.42E+01 54 3.51E+00 3.58E+00 3.65E+00

6 2.14E+01 2.18E+01 2.21E+01 56 3.29E+00 3.36E+00 3.43E+00

8 1.96E+01 2.00E+01 2.03E+01 58 3.08E+00 3.15E+00 3.22E+00

10 1.80E+01 1.83E+01 1.86E+01 60 2.89E+00 2.96E+00 3.01E+00

12 1.66E+01 1.69E+01 1.71E+01 62 2.71E+00 2.78E+00 2.84E+00

14 1.53E+01 1.55E+01 1.57E+01 64 2.55E+00 2.61E+00 2.67E+00

16 1.41E+01 1.43E+01 1.45E+01 66 2.40E+00 2.45E+00 2.51E+00

18 1.30E+01 1.32E+01 1.33E+01 68 2.25E+00 2.31E+00 2.37E+00

20 1.20E+01 1.22E+01 1.23E+01 70 2.12E+00 2.17E+00 2.23E+00

22 1.11E+01 1.12E+01 1.14E+01 72 2.00E+00 2.05E+00 2.10E+00

24 1.03E+01 1.04E+01 1.05E+01 74 1.88E+00 1.93E+00 1.98E+00

26 9.52E+00 9.62E+00 9.72E+00 76 1.77E+00 1.82E+00 1.87E+00

28 8.82E+00 8.92E+00 9.02E+00 78 1.67E+00 1.72E+00 1.77E+00

30 8.17E+00 8.27E+00 8.37E+00 80 1.58E+00 1.62E+00 1.67E+00

32 7.58E+00 7.68E+00 7.78E+00 82 1.49E+00 1.53E+00 1.58E+00

34 7.04E+00 7.14E+00 7.23E+00 84 1.41E+00 1.45E+00 1.49E+00

36 6.54E+00 6.64E+00 6.73E+00 86 1.33E+00 1.37E+00 1.41E+00

38 6.09E+00 6.18E+00 6.27E+00 88 1.26E+00 1.30E+00 1.34E+00

40 5.67E+00 5.75E+00 5.84E+00 90 1.19E+00 1.23E+00 1.27E+00

88

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Acson R5CM, ACK, A5CK, A5WMX, ACC Service Manual Book

Specifications and Main Features

Frequently Asked Questions

User Manual