McQuay MWSS Troubleshooting guide

SERVICE

GUIDE BOOK

MCQUAY Service Guide Book

Table of Contents

NAME

1.1 Product Name Description

Table of Contents

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3.0 PRODUCT MAINBOARD VS HANDSET MATRIX

3.1 Product Mainboard vs. Handset Matrix

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

G6

4.2

G11

4.4

GS01

4.6

4.7

4.8

SLM3

SLM8

4.9

4.10 Netware 3/3C

4.11 Rooftop Panel

4.12 Chiller Panel

4.13 MC301

4.14 MC303

5.1 Auto Random Restart

5.2 Hot

5.3

5.4 Chilled Water Fan Coil Unit – W1V3

5.5

5.6

Chilled Water Fan Coil Unit – W2.0

Hardware Setting – SLM8

6.1

6.6

Auxiliary Heater Conversion

6.3 U1.5

6.4

Multi

WMF U1.4 to L2EF Conversion

6.5 SQ Board for Wiring up to 1000m Conversion

Room Sensor On Netware 3

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7.1 LED Lights Diagnosis Table

7.2 Error Codes Diagnosis By Handset

APPENDIX

A. Resistance – Temperature Characteristic

B. MDS Compatibility

C. MDS Outdoor Capacity Dip Switch Setting

D. Cable Length Of Wired Handset

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“Mcquay” is a registered trademark of Mcquay International. All rights reserved.

© 2012 Mcquay International. All rights reserved throughout the world.

Bulletin illustrations cover the general appearance of Mcquay International products at the time of publication.

We reserve the right to change design and construction specification at any time without notice

1

2

3

4

42

62

72

75

76

33

36

37

38

39

41

77

78

79

80

26

26

28

30

31

32

18

19

20

21

24

10

12

14

15

17

8

9

6

7


1.0 MODEL NAME

1.1 Product Name Description

No. Description

1 Wall Mounted Fan Coil Unit

2 Wall Mounted AC Inverter Fan Coil Unit

3 Wall Mounted DC Inverter Fan Coil Unit

4 Wall Mounted DC Inverter-Y Fan Coil Unit

5 Ceiling Exposed Fan Coil Unit

6 Ceiling Exposed Inverter-Y Fan Coil Unit

7 Ceiling Cassette Fan Coil Unit

8 Ceiling Cassette Inverter-Y Fan Coil Unit

9 Ceiling Concealed Fan Coil Unit

10 Ceiling Concealed Inverter-Y Fan Coil Unit

11 Ducted Split Blower Unit

12 Chilled Water Fan Coil Unit

13 Water Source Heatpump Split Unit

14 Horizontal Water Source Heatpump Unit

15 Air Cooled Mini Chiller

16 Single Split Condensing Unit

17 Single Split AC Inverter Condensing Unit

18 Single Split DC Inverter Condensing Unit

19 Single Split DC Inverter Condensing Unit

20 Modular Split Condensing Unit

21 Multi Split Series

22 Multi Split AC Inverter Condensing Unit

23 Multi Split DC Inverter Condensing Unit

24 Multi Split DC Inverter Condensing Unit

25 Multi Digital Scroll Units

26 Horizontal Condensing Unit

27 Vertical Condensing Unit

28 Air Cooled Roof Top Packaged Air

Conditioner

29 Air Cooled Inverter Mini Chiller

SL / 4SL / 5SL

SLV

5SLX

5SLY

MSS / 4MSS

MSD / 4MSD

MST / 4MST

MSH

MSV

5MSX

5MSY

MDS/ 5MDS

HDC / 5HDC

VCU

RT / 4RT / 5RT

WM / 5WM

WMV

5WMX

5WMY

CE / 5CE

5CEY

CK / 5CK

5CKY

CC / 5CC

5CCY

SB

CW

WSS / 5WSS

WH

AC / 4AC / 5AC

5ACV

Model Name

MCQUAY Brand

MWM / M5WM

MWMV

M5WMX

M5WMY

MCM / M5CM

M5CMY

MCK / M5CK

M5CKY

MCC / M5CC

M5CCY

MDB

MCW

MWSS / M5WSS

MWH

MAC / M4MAC /

M5MAC

MLC / M4LC / M5LC

MLCV

M5LCX

M5LCY

MMC / M4MC

MMSD / M4MSD

MMST / M4MST

MMSH

MMSV

M5MSX

M5MSY

MDS/ 5MDS

AHDC / A5HDC

MVCU

MRT / M4RT / M5RT

M5ACV

2

MCQUAY Service Guide Book Conversion Table

2.0 CONVERSION TABLE

2.1 Conversion Table

Capacity

Btu/hr MBH kCal/Hr kW

1

3.968

0.001

0.004

0.252

1

0.293 x 10

1000 1 252

-3

1.162 x 10 -3

0.293

Pressure

3412 3.412 860.04 1

PSI kg/cm

1

14.22

3.61 x 10

1.45 x 10

-2

-4

0.07

2

1

2.538 x 10

0.1 x 10 -4

-3

(in.)

27.7

394.08

W.G. Pascal

(ft.) (Pa)

2.309

32.84

0.69 x 10

9.81 x 10

4

4

1 0.083 248.84

Flow Rate

L/s m

3

/hr m

1 3.6

0.278 1

3

0.278 x 10

GPM CFM

-3 4.403 0.588

1000 3600 1 15850 2119

0.063

0.472

0.227

1.7

0.063 x 10

0.472 x 10

-3

-3

1 0.1337

7.481 1

Temperature

°F = (1.8 x °C) + 32

°

C

=

°

F

1

−

.

8

32

Velocity fps m/s fpm

1 0.305 60

3.281 1 196.9

0.017 0.005 1

Volume

L m

3

U.S. G.P.M.

ft

3

0.264

1000 1 264 35.3

3.785 3.785 x 10

-3

1 0.134

28.315 0.028 7.48 1

Area in 2 ft 2

1 6.94 x 10

-3 m 2 cm

6.452 x 10

-4

2

6.452

929.03

1550.06 10.764 1 1

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

3

MCQUAY Service Guide Book Product Mainboard vs. Handset Matrix

3.0 PRODUCT MAINBOARD VS. HANDSET MATRIX

3.1 Product Mainboard vs. Handset Matrix

Type No.

Model

DX

Main Board

1 WM - F Series

2 WM - G Series

3 WMS - G Series

4 WM – J Series

5 CK - A/B/C/E Series

6 CE - D Series

7 CE - E Series

8 CC - C Series

9 CC - D Series

10 SB - B/C Series

SB 75 – 100B/BR

SB 125 – 150B/BR

SB 125CR

SB 150B2/BR2 –

600B4/BR4

11 SB – D/ER Series

SB 75 – 100D/ER

SB 125 – 150D/ER

SB 125D2 – 500D4

SB 125ER2 –

600ER4

L2.0

9

9

9

L2

GSN

L2

08A

9

R_1_

01A

W_2_

03A

C_2_

01A

2P2065

69-4

U1

SB125

SQ

2.0

9

VA2.0 VA3.0

SQ-LCD

SLM3

9 SLM3

9 SQ-LCD

9 SQ-LCD

Handset

Standard Optional

9

G17 3/SLM8

G17

G17

SLM3+AC5300/Netware 3/SLM8


GS01 -

9

9

G17/GS01

G17



9

9

9

9

G17 SLM3+AC5300/Netware 3/SLM8

SLM3

SLM3

9

9

SLM3

SLM3

SLM3

-

-

-

-

-

-

RT 55 – 120A/AR

RT 150 – 420A/AR

5RT 90 – 250BR

13 WMX – F/G Series

CKX – A/C Series

CEX – E Series

CCX – C Series

14 WMY – J Series

15 WMY – K Series

16 CKY – E Series

CEY – E Series

CCY – C Series

9

9 SLM3

9 SQ-LCD

9 G17

9

9

9

G17

G17

SLM3

9 G17/GS01

9 APJ1

9

9

9

GS01

GS01

Netware 3C

-

-

-

SLM3 + AC5300

SLM3 + AC5300

SLM3 + AC5300

Netware 3 / SLM8

-

-

Netware 3C

4

MCQUAY Service Guide Book Product Mainboard vs. Handset Matrix

Type

CW FCU

Mini Chiller

WSHP

Main Board (IC)

No.

Model

13 WM – GW Series

W2

9

14 CK – AW/MWH/CW Series 9

15 CE – DW Series 9

16 CE – EW Series 9

17 CC – CW Series 9

18 SB – BW Series 9

MC1.0

LWS2 APM01CB APM02D

Standard

G17

G17

G17

G17





SLM3

N/A

Handset

Optional

Netware 3 / SLM8

-

19 AC – C Series

AC 20 – 60C/CR

AC 80 – 150C/CR

5AC 20 – 25C/CR

9

9

9

Panel

Panel

Panel

-

-

-

5AC 30 – 55C/CR

20 5WMWS – GR

Panel

9

-

22 5CCWS – CR

23 WH – B Series

WH 11 – 20B/BR

WH 25 – 70B/BR

9

9

9

9 SLM15A

9 APW04A

-

-

5

MCQUAY Service Guide Book Handset Operating Guide

4.0 HANDSET OPERATING GUIDE

4.1 G6

Operation Guide

1. “ON/OFF” Switch

2. Temperature Setting

• 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 toggle the temperature setting between

°C and °F.

3. Automatic Air Swing

The swing angle ranging from horizontal to 25° to bottom.

4. “SLEEP” MODE

• This function can be activated in COOL,

HEAT & AUTO 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.

6

5. Timer Setting

Press button to activate the timer setting

(from 1 hour to 15 hour) of the air conditioning unit. To cancel the timer setting, press the button continuously until the timer display goes off.

6. Operation Modes

• Cooling only unit : Cool →Dry →Fan

• Heatpump unit : Auto →Cool →Dry

→Fan →Heat

7. Fan Speed and Ventilation Mode Selection

8. Signal Transmission Indication

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


4.2 G7

Operation Guide

1. Transmission Source


3. On/Off Button

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


• 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.

5. Operation Mode

• Cooling only unit: COOL, DRY & FAN.

• Heatpump unit: AUTO, COOL, DRY,

FAN & HEAT.

6. Fan Speed Selection

7. On Timer Setting

8. Off Timer Setting

9. Automatic Air Swing (Optional)

• Press button to activate the automatic air swing function. Press again to stop the louver at the desired direction.

10. Sleep Mode Setting

• 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.

7


4.3 G11



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.


• Press + button to increase the clock time.

• Press – button to decrease the clock time.

10. Turbo Mode

Operation Guide

1. “ON/OFF” Button



16°C to 30°C.

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

3. Operation Mode

• Cooling only unit: COOL ( ), DRY ( ) and FAN ( ).

• Heat pump unit: AUTO, COOL ( ), DRY

( ), FAN ( ) and HEAT ( ).

4. Fan speed selection

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

( ) –––: Med (

–––: Auto

5. ON Timer Setting

) –––: High ( )

6. OFF Timer Setting

7. Automatic Air Swing

• Press the SWING ( ) button to activate the automatic air swing function. Press again to stop the louver at the desired direction.

• 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.

8


4.4 G17

Operation Guide



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


• 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.

5. Automatic Air Swing (optional)

SWING button to activate the automatic air swing function. Press again to stop the louver at the desired direction.

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.



HEAT and AUTO mode.

• When 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 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.


• 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

11. Timer Cancel

12. OFF Timer Setting

13. ON Timer Setting

14. Turbo Function

• Press for fast cooling.

• Fan speed turn to maximum speed.



• Press and hold to set the clock time.

9


4.5 GS01

6

7

9

11

Operation Guide


2. Signal transmission indication

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

3. ON/OFF Button

4. Fan Speed selection

• Press the button continuously will toggle the fan speed.

5. Operation mode

• For cooling only unit: COOL , DRY and FAN .

• For heat pump unit: AUTO , COOL

, DRY , FAN and HEAT .

• The chilled water system.

6. Automatic air swing the button to activate the automatic air swing function. Press again to stop the louver at the desired direction.

1

2

3

4

5

13

12

8

10

Swing mode selection (for CK-E model)

• Press enter field setting mode.

• While in field setting mode, it will only show SWING MODE .

• Press temperature button to select

SWING MODE rotation from Swing

Mode 1 to Swing Mode 3.

• There are 3 different SWING MODE, which are:

Mode 1 Mode 2 Mode 3

SWING MODE will not activate unless SWING is activated.

• 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 for 15 minutes.


• Available under HEAT, COOL and DRY modes only.

10


• Any change of fan speed will deactivate this function.

Turbo chilled water system and remote control with SWING MODE

8. OFF timer setting function.

9. Quiet function (model dependant)

• Press for quiet operation.

• Fan speed turn to minimum speed.


• 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

12. Sleep mode setting

• This function is available under COOL,

HEAT and AUTO mode.

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

13. Temperature setting


16°C to 30°C (Optional setting 20°Cto

30°C).

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

11


4.6 APJ1

5

7

3

4

12

11

Operation Guide


2. LCD Display

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

• Press

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

button to cancel ECONO operation. The symbol disappears from the LCD.

4. POWERFUL Button

button

• POWERFUL operation quickly maximizes the cooling / heating effect in any operation mode.

• To start POWERFUL operation, press button. is displayed on the LCD. POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before

POWERFUL operation.

1

2

6

8

9

10

13

• To cancel POWERFUL operation, press

button again. from the LCD.

5. Temperature Settings.

6. ON/ OFF button

disappears

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

• 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 start auto swing, press button and the symbol is displayed on the

LCD.

12


• 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

• To cancel OFF TIMER operation, press will disappear from the

10. COMFORT AIRFLOW Operation

• When COMFORT is enable, the flow of air

• To start COMFORT AIRFLOW operation, moving. The symbol disappeared from the LCD. 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. press COMFORT change, preventing air from blowing directly on the occupants of the room. The symbol again. The flap will return to the memorized position before the

COMFORT AIRFLOW operation.

• The symbol will disappear from the

LCD. 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

11. ON TIMER Operation button

• To use ON TIMER operation, press

• button.

is displayed on the LCD. Each pressing of button.

LCD.

will disappear from the

12. OFF TIMER Operation pressing of advances the time setting by 1 hour. The timer can be set between 1 to 9 hours. button. The flap will

advances the time setting by 1 hour. The timer can be set between 1 to 12 hours.

• To cancel ON TIMER operation, press

• To use OFF TIMER operation, press

• button. is displayed on the LCD. Each button.

LCD.

13. CANCEL Button

13


4.7 SLM3

Operation Guide

1. “ ON/OFF” Switch


• 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.


• 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 between 1 to 15 hours).

6. “SLEEP” Mode

• This function can only be activated under 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).


“cool” or heating mode operation. When it is activated under “cool” mode operation, the set temperature will increase 0.5°C

14


4.8 SLM8 • While in field setting mode, it will only show SWING MODE .

• Press temperature button to select

SWING MODE rotation from Swing

Mode 1 to Swing Mode 3.

• There are 3 different SWING MODE, which are:

No. KEY No. KEY

1 MODE

2 TURBO

3 SWING

4 QUEIT 11 FAN

5 SET TEMP UP 12 ON/OFF

TEMP

DOWN

7 SLEEP

TIME

CLOCK (RTC)

Operation Guide

1. MODE Button

• Press the MODE button to switch operation from COOL, HEAT, DRY*, FAN.

DRY mode is available for selected models only.

2. TURBO Fan Speed

• Press the TURBO key once to activate

Turbo fan speed. Turbo symbol will be shown. To disable Turbo fan speed and

BACK to previous fan speed, press the

Turbo key once again. If user presses the

FAN button or QUIET button or turn off the unit, the turbo speed will be disabled.

This speed is only valid during COOL mode for selected models.

3. Automatic Air Swing the button to activate the automatic air swing function. Press again to stop the louver at the desired direction.

Swing mode selection (for selected model)

SWING button for 4 seconds to enter field setting mode.

Mode 1 Mode 2 Mode 3

SWING MODE will not activate unless SWING is activated.

• If no mode changes within 4 seconds, unit will operate According to the selected

SWING MODE

4. Quiet Fan Speed

.

• Press the QUIET key once to activate

Quiet fan speed. QUIET symbol will be shown.

• To disable Quiet fan speed and BACK to previous fan speed, press the QUIET key again.

• If user presses the FAN button or TURBO button or turn off the unit, the quiet speed will be disabled. This speed is only valid during COOL mode for selected models.


• Press the temperature button and set the temperature of your choice by pressing

“ ” or “ ” button once, temperature changes by 1°C or 1°F. The default temperature setting range is from

16°C to 30°C (60°F to 86°F).

• Pressing both keys simultaneously will toggle the temperature setting between ºC and ºF.

• No temperature setting is allowed during

FAN mode (No set temperature display).

There is no room temperature display.

6. SLEEP Function

• Press the SLEEP button to activate the sleep mode. SLEEP function is not available in DRY mode and FAN mode.

7. ON TIMER and OFF TIMER

• The unit has 2-event timer, namely Timer

1 and Timer 2, each event has an ON

TIMER and an OFF TIMER.

• All timers are event-triggered timers and can be overridden by the ON/OFF button and Override function.

15


Set Event 1 and Event 2 Timers

• Process for Timer ON and Timer OFF is the same.

• Press and hold Timer ON/OFF key for 3 seconds to go into timer setting mode.

(Icon ON 1 or OFF 1 will blink)

• Press UP or DOWN to select Timer 1 or

Timer 2 to set. (‘1’ blinking indicate that

Timer 1 is currently selected, ‘2’ blinking indicate that Timer 2 is currently selected)

• Press Timer ON/OFF key again to confirm. (Day will blink next)

• Press UP or DOWN to select the day.

• Press Timer ON/OFF key again to confirm the day. (Hour will blink next)

• Press UP or DOWN to change the hour.

• Press Timer ON/OFF key again to confirm the hour. (Minute will blink next)

• Press UP or DOWN to change the minute.

• Press Timer ON/OFF key again to confirm the minute.

• Each timer (Timer 1 ON or Timer 1 OFF or Timer 2 ON or Timer 2 OFF) will only be set separately, if there is no key operation for 5 seconds during setting the timer, it will automatically exits from setting mode and no changes will be made.

• ON/OFF timer will be checked every 1 minute. It is not advisable to set ON

TIMER and OFF TIMER to have same values. Shall these occur, the effective timer will be treated with priority as stated in Table below:

Table: Timer Priority

Priority Timer

1 (Highest) ONTMR2

2 OFFTMR2

3 ONTMR1

4 (Lowest) OFFTMR1

• Upon IR reception, IR wireless remote controller will override ON TIMER 2 and

OFF TIMER 2 settings.

Example:

ON TMR 2 setting : DAY TUE, TIMER 5.00pm

OFF TMR 1 setting: DAY TUE, TIMER 5.00pm

Outcome when RTC reaches 5.00pm on TUE:

− when unit is on, no respond.

− when unit is off, unit will turn on.

8. DELAY TIMER Function

• Press the DELAY TIMER key once will activate the delay timer function for 1 hour. An indicator “OVERRIDE” will show on the LCD.

• Press the same key again will increase the setting to 2 hours. An indicator

“OVERRIDE” will be shown. Subsequent press will deactivate the delay timer function.

• After the delay timer is completed, the delay timer function is deactivated and the logo is OFF. All other timers will be resumed.

9. FAN Speed

• Fan speed can be changed via pressing the FAN key:

Low > Med > High > Auto >

• FAN speed is not available in DRY mode.

10. ON/OFF Button

11. Real-time Clock Display

• RTC is shown on screen during the unit

ON or OFF except for power failure or error code.

Set RTC Setting

− Press RTC key one time will activate RTC setting mode. (Day will blink)

− Press UP or DOWN to select the day.

− Press RTC again to confirm the day.

(Hour will blink next)

− Press UP or DOWN to change the hour.

− Press RTC again to confirm the hour.

(Minute will blink next)

− Press UP or DOWN to change the minute.

− Press RTC again to confirm the minute.

• RTC will only be set after all 7 steps, if there is no key operation for 5 seconds during setting the RTC, it will automatically exits from setting mode and no changes will be made.

12. Key Lock

• Press and hold both TURBO and QUIET keys for 5 seconds will activate/deactivate the key lock function; “KEYLOCK” will be shown/disappear on LCD. Upon all the keys are locked, only ON/OFF, TURBO and QUIET (to unlock) can be pressed.

16


4.8 Sequential Controller

A : Time F : Energy saving mode

B : Error indication G : Compressor defrost

C : Comp. running cycle (up to 4 comps.)

(up to 4 comps.) H : Operation mode

D : Key lock

Operating Guide

I : Temperature set

E : Heater (up to 2 heaters)


• Caution: In the case when the ON/OFF key is pressed immediately after the operation is stopped, the unit will not restart until 3 minutes later to protect the compressor.

2. Selecting Operating Mode the key to select the type of operating mode. Consecutive press of the key switches the operation over “COOL”,

“HEAT”, “AUTO” and “FAN”

3. SAVE Mode the key to select the energy saving function. This option is only available for “COOL”, “HEAT” and “AUTO” modes.

4. Auxiliary Electric Heater

• If the “HEAT” mode provides insufficient heating to a room even at the highest temperature 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.

4.9 Netware 3 / Netware 3C


• 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 key once to activate set clock mode.

• 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 and DAY key.

7 days timer

• Press key to activate auto

ON timer mode. Under this mode, press the respective MINUTE, HOUR and DAY key to select the time of the week when the air-conditioning unit is to automatically start running. Press ON TIMER key again to save the setting. the key to activate auto OFF timer mode. Under this mode, press the respective MINUTE, HOUR and

DAY key to select the time of the week when the air-conditioning unit is to automatically stop running. Press the ON

TIMER key again to save the setting.

• Then to activate the 7 days timer, press the HOLD key until the word “TIMER

ACTIVE” appears on the LCD screen.

Repeat the same step to disable the 7 days timer.

7. Other Function

Key Lock

• Press the MINUTE key 3 times consecutively to activate the key lock. A

“KEY LOCK” symbol 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 TEST RUN key 2 times consecutively to test run the unit.

17


1. Time

2. Key

3. Error

4. Fan indication speed

5. Operation display

6. Sleep mode swing display display

Jumper

20 - 30

SET

OFF

Application

Set temp range : 20°C ~ 30°C

Set temp range : 16°C ~ 30°C

Differences between Netware 3 & Netware 3C:

Compatibility

Casing Color

Retrieve Last State Error

Netware 3

Non-inverter / X-inverter

Series

Netware 3C

Y-inverter Series

Dark Silver White

No Yes

Pump Down No Yes

Applicable model

NIM/G-WAY

All except A(5)WM-J/JR

For MCK-E, only applicable with nomenclature ACOBB

Yes

For MCK-E, only applicable with nomenclature ACOBB

Operating Guide


• Caution: In the case when the ON/OFF key is pressed immediately after the operation is stopped, the unit will not restart until 3 minutes later to protect the compressor.

2. Selecting Operating Mode

• Press key to select the type of operating mode. Consecutive press of the key switches the

• operation “COOL”, “HEAT”, “AUTO”,

“DRY” and “FAN”

All except M5WMY-J/JR

No

3. Fan Speed Selection the key until the desired fan speed is achieved.

4. Sleep Mode Setting the key to activate sleep mode. 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.

18


• 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.


• 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 the key to activate the automatic air swing function.

7. Time Setting

Real time clock

• Press the CLOCK key to activate set clock mode. 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 and DAY key.

7 days timer

• The unit has 3 event functions; each event has an ON TIMER and an OFF

TIMER. Press the timer key (ON

TIMER/OFF TIMER) will enable Event 1 timer setting mode. Press same key again will enable Event 2 timer setting mode.

Press the 3rd times will enable the Event

3 (Event handset) timer setting mode.

Subsequent key pressed the unit will quit from timer setting mode.

Set Event 1 and Event 2 Timers

• Under timer setting mode, “SET TIMER” will be shown on LCD and blink at 0.5 sec interval. For Event 1 Timer setting, ‘ON’ or

‘OFF’ indication will appear and digit “1” will be displayed on the top left corner of the LCD. ‘ON’ or ‘OFF’ indication and digit

“2” will be displayed during Event 2 timer setting. The timer setting can be changed through pressing the DAY key, HOUR key or MINUTE key. If there is no further time related (DAY,

HOUR and MINUTE) key is pressed, the unit will quit from the timer setting mode.

Set Event 3 Timer via remote control (Optional)

4.10 Rooftop Panel

• This timer can be controlled separately through remote control as well as ON

TIMER or OFF TIMER keys. Timer 3 can be set like timers 1 and 2 like above except the DAY setting is not provided as this timer setting is valid everyday. An indicator ‘3’ will display during the Event 3 timer setting mode. ‘ON’ or ‘OFF’ will blink at 0.5 sec interval during the timer setting.

If there is no further time related (DAY,

HOUR and MINUTE) key is pressed, the unit will quit from the timer setting mode.

Activating and canceling timers

• These timers will not trigger if the timer is not active. To activate the timers, press the TIMER ACTIVE key unit “TIMER

ACTIVE” appears on LCD. This symbol is to indicate Event 1, Event 2 and/or Event

3 timers are active. Pressing the same steps will deactivate the timers and

“TIMER ACTIVE” symbol will disappear.

• Another method to cancel the timers setting is changed all the hour setting of the timers to null, the LCD display --:--, then this respective timer will be disable.

8. Other Function

Key Lock

• Press the MINUTE key 3 times consecutively to activate the key lock. A

“KEY LOCK” symbol 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.

Fan Lock

• When the DAY key is press 3 times consecutively within 1.5 sec, the fan symbol will disappear and fan key will be inhibited. Press the DAY key 3 times to cancel the fan lock function.

19


Operating Guide

1. LCD Display

• Upon power up of the unit, the LCD displays the main display screen

2000/01/0 [SAT] 12:00am

Status

Mode

Set Temp

: OFF

: Heating

: 24°C

▼


• Press the ON/OFF button for 1 second to switch on the unit if the status shows OFF.

The status will change to ON. The

ON/OFF LED will light up.

3. HEAT Button

• Press the HEAT button for 1 second if heating is required.

4. COOL Button

• Press the COOL button for 1 second if cooling is required.

5. ALARM Button

• Press the ALARM button to view or clear the alarm history.

• The panel can keep up to 20 faults/alarm warning records.

6. ECS Button

7. Downward Button

• Press the button once to view the

Compressor(s) On, Off or Defrost

Status.

• Press the button again to view the temperature for Return Air and Outdoor

Air.

• Press the button again to view the

Selected Type for Unit, Number of

Compressor used, Indoor Fan Option,

Model and EEPROM version.

8. Upward Button

• Press the button to return to previous screen(s)

9. ENTER Button

• Press the button to enter [Main Menu].

• There are 6 sub menus in [Main Menu].

Operation Menu > Setting Menu >

Timer Menu > Alarm Menu > Warning

Menu > Display Menu.

• Press or to select sub menus, press ENTER to enter into the sub menu or press ESC to exit to main display screen.

• Details please refer to Rooftop Panel

Operation Manual.

• Press to exit to previous Menu.

20


4.11 Chiller Panel

Operating Guide

1. LCD Display

• Upon power up of the unit, the LCD displays the main display screen

01/01/2003 12:00am

Status

Mode

: OFF

: Cooling

Set Temp : 12°C

[00]


• Press the ON/OFF button for 1 second to switch on the unit if the status shows OFF.

The status will change to ON. The

ON/OFF LED will light up.

• The Set Temp refers to water in temperature and the factory setting is

12°C for cooling and 40°C for heating.

• [00] refers to the factory setting for panel

ID.

3. HEAT Button

• Press the HEAT button for 1 second if heating is required.

4. COOL Button

• Press the COOL button for 1 second if cooling is required.

5. ALARM Button

• Press the ALARM button to view or clear the alarm history.

• The panel can keep up to 20 faults/alarm warning records.

6. ECS Button

• Press to exit to previous Menu.

7. Downward Button

• Press the button once to view the

Compressor(s) On or Off status.

• Press the button twice to view the temperature for Water In, Water Out,

Outdoor Air and Controller Panel.

• Press the button again to view the Air

Conditioning Model, Number of

Compressor used and Unit Number.

8. Upward Button

• Press the button to return to previous screen(s)

9. ENTER Button

• Press the button to enter [Main Menu].

• There are 6 sub menus in [Main Menu].

Operation Menu > Setting Menu >

Timer Menu > Alarm Menu > Display

Menu.

• Press or to select sub menus, press ENTER to enter into the sub menu or press ESC to exit to main display screen.

• Details please refer to Chiller Panel

Operation Manual.

21


4.12 MC301

Operating Guide

1. ON/OFF Operation

• Press “ON/OFF” key, the unit will be ON or OFF, and “ON” or “OFF” will display on the LCD.

2. Temperature Setting decrease by 1 °C/°F, temperature range is 16-30 °C (61-86°F).

• Press “FAN” for 5s to alter between °C swing function (Only for swing unit).

“SWING” will display on LCD.

6. Auxiliary Heater Setting

• Under “HEAT” or “FAN” mode, press

“HEATER/SWING” key to active heater.

(Only for heater unit). “HEATER” will display on LCD.

7. Sleep Setting

• Press “SLEEP” key, “SLEEP” will display on LCD, which means this function is active. and °F.

3. Fan Speed Setting

• Press “FAN” key to adjust fan speed

High→Auto→Low→Medium→High.

• When the mode is “Fan”, there is no

“Auto” speed. Single-speed fan motor has no this function.

4. Mode Setting

• Press the “MODE” button, the current mode is twinkling. Press again to change mode as follows:

When the outdoor unit is OFF:

- Heat pump:

COOL→HEAT→FAN→DRY

- Cooling only:

COOL→FAN→DRY

When the outdoor unit is Cooling:

COOL→FAN→DRY

When the outdoor unit is Heating:

HEAT→FAN

5. Swing Setting

• Press “HEATER/SWING” key to active

8. Keyboard Lock

• Press “SLEEP” for 5s, the keyboard will follows by:

• When it is locked, the lock icon will be shown on the LCD. During the locked stage, only the ON/OFF key is valid.

9. Real Time Clock Setting

• Press “CLK” to enter, firstly is “week setting”; press “▲” or “▼” to change from

Sunday to Saturday. If there is no any press for 5s on any key, it will exit to the displaying status.

• Press “CLK” again is the “CLOCK SET” icon will display and the current real time clock is twinkling. At this time, press “▲” to increase the hour, press

“▼” to increase minutes ，if there is not any press for 5s, it will exit without saving the changed real time. If you want to confirm the new setting, you need to press “CLK” once again within 5s.

• During the setting process, only “▲”, “▼” and “CLK” are valid. If other key is press, it will exit to the normal status.

22


10. Reset

• This key is used to reset the unit.

11. Timer Setting

• Week timer setting: Include total 28 on/off timers, 7 days every week and 4 timers every day.

• Single timer setting: It is active only on the same day that timer set when power on. It is inactive when timer is set at AM 00:00.

It can be set at AM 00:00 if you want to cancel some timer setting.

• Press “FAN” and “MODE” at one time, all timers setting can be cancelled.

• Timer display: The current timer setting will display every 2s.

• The third bit of the K1(micro-switch) of

PCB board must be set ON if PCB has clock chip and battery, otherwise the real time clock will not be activated once power is shut off.

A) Week Timer Setting

• Press “TIMER” ， “WEEK SET” and

“TIMER SET” will display on the left and bottom of LCD panel, press “▲” or “▼” to select a day (Sunday to Saturday), press

“TIMER” again, the day is selected, the timer’s states of the selected day will display on LCD Panel.

• Enter first timer setting, the timer ON or

OFF icon will display on the left and bottom of LCD panel, the timer sequence number “1” will display on the top of LCD, press “▲”or “ ▼ ” to select timer sequence number, press “TIMER”, the timer sequence number is selected.

• Enter timer ON and timer OFF setting, press “▲” or “▼” to select timer ON or timer OFF, “TIMER ON” or “TIMER OFF” is twinkling, Press “TIMER”, timer ON or timer OFF is selected.

• Enter timer setting, “TIMER SET” and

“CLOCK SET” will display on the left and bottom of LCD panel, press “▲” to set hour and press “▼” to set minute, press

“TIMER” again to finish setting and enter next timer setting, repeat above procedures to finish others timer setting.

B) Single Timer Setting

• Press “TIMER” key for 5s, enter single timer setting (When the unit is ON, it can only be set to OFF; When the unit is OFF, it can only be set to ON), the “TIMER

SET” will display on LCD panel, press “▲” to set hour and press “▼”to set minute, press “TIMER” to finish the single timer setting.

•

Exit timer setting: If there is no press on any key within 5s or press any key except

“▲”, “▼”, “TIMER” and “ON/OFF” key, it will exit the timer setting.

23


4.13 MC303

Operating Guide

1. Address Register

• After communication wire is completely connected, press “SETUP” key for 5s.

Address will be automatically registered and a number from 60 to 0 will be shown on the display LCD.

2. View Actual Address

• Press “MODE” key for 5s then press “▲” or “▼” to view all the units.

• Actual address has four figures; first two where show on minute previously are for outdoor unit, last two where show error previously at the right bottom corner are for indoor unit.

3. Single/Group Unit Setting

• Press “UNIT No.” key to enter the unit setting, then press “▲” or “▼” to choose the unit number to be set and press

“ENTER” to confirm choosing.

• When LCD panel show “_ _”, press

“ENTER” to confirm enter group setting.

4. ON/OFF Operation

• Press “ON/OFF” key to RUN or STOP the unit operation.

• For Group On/Off, press “ON/OFF” key for 5s and the unit number is twinkling,

“[ ]” is displayed on LCD panel. Then press “ON/OFF” key to turn on/off all units.

5. Mode Setting

24

• Press the “MODE” button, the current mode is twinkling. Press again to change mode as follows:

When the outdoor unit is OFF:

- Heat pump:

COOL→HEAT→FAN→DRY

- Cooling only:

COOL→FAN→DRY

When the outdoor unit is Cooling:

COOL→FAN→DRY

When the outdoor unit is Heating:

HEAT→FAN


• Press “FAN” for 5s to alter between °C and °F. decrease by 1 °C/°F, temperature range is 16-30 °C (61-86°F).

7. Fan Speed Setting

• Press “FAN” key to adjust fan speed follows by:

High→Auto→Low→Medium→High

• When the mode is “Fan”, there is no

“Auto” speed. Single-speed fan motor has no this function.

8. Swing Setting

• Press “SWING” key to active swing function. “SWING” will display on LCD.

9. Sleep Setting

• Press “SLEEP” key, “SLEEP” will display on LCD, which means this function is active.


10. Indoor unit lock/unlock

• Press “UNIT No.” key to enter the unit setting, then press “▲” or “▼” to choose the unit number to be set or choose “_ _” for group setting and press “ENTER” to confirm. After that, press “SLEEP” key 5s to lock the chosen unit, the symbol “ ” will display on LCD panel, any operation by LCD panel or remote controller is invalid.

• To unlock the unit, press “SLEEP” key 5s, the symbol “ ” will disappear.

11. Real Time Clock Setting

• Press “CLK” to enter, firstly is “week setting”; press “▲” or “▼” to change from

Sunday to Saturday. If there is no any press for 5s on any key, it will exit to the displaying status.

• Press “CLK” again is the “CLOCK SET” icon will display and the current real time clock is twinkling. At this time, press “▲” to increase the hour, press “ ▼ ” to increase minutes ， if there is not any press for 5s, it will exit without saving the changed real time. If you want to confirm the new setting, you need to press “CLK” once again within 5s.

• During the setting process, only “▲”, “▼” and “CLK” are valid. If other key is press, it will exit to the normal status.

12. Timer Setting

A) Single Timer Setting

• Single timer setting: It is active only on the same day that timer set when power on. It is inactive when timer is set at AM 00:00.

It can be set at AM 00:00 if you want to cancel some timer setting.

• Press “TIMER” key for 5s, enter single timer setting (When the unit is ON, it can only be set to TIMER OFF; When the unit is OFF, it can only be set to TIMER ON), the “TIMER SET” will display on LCD panel, press “▲” to set hour and press “▼”to set minute, press

“TIMER” to finish the single timer setting.

B) Week Timer Setting

• Week timer setting: Include total 28 on/off timers, 7 days every week and 4 timers every day.

• Press “TIMER” ， “WEEK SET” and

“TIMER SET” will display on the left and bottom of LCD panel, press “▲” or “▼” to select a day (Sunday to Saturday), press

“TIMER” again, the day is selected, the timer’s states of the selected day will display on LCD Panel.

• Enter first timer setting, the timer ON or

OFF icon will display on the left and bottom of LCD panel, the timer sequence number “1” will display on the top of LCD, press “▲”or “▼” to select timer sequence number, press “TIMER”, the timer sequence number is selected.

• Enter timer ON and timer OFF setting, press “▲” or “▼” to select timer ON or timer OFF, “TIMER ON” or “TIMER OFF” is twinkling, Press “TIMER”, timer ON or timer OFF is selected.

• Enter timer setting, “TIMER SET” and

“CLOCK SET” will display on the left and bottom of LCD panel, press “▲” to set hour and press “▼” to set minute, press

“TIMER” again to finish setting and enter next timer setting, repeat above procedures to finish others timer setting.

• Press “SWING” for 5s, all week timer setting in EEPROM will be deleted.

• Exit timer setting: If there is no press on any key within 5s or press any key except

“▲”, “▼”, “TIMER” and “ON/OFF” key, it will exit the timer setting.

13. Lock/unlock LCD Panel

• Press “HEATER” and “SLEEP” key for 5s, the symbol “ ” will twinkles on LCD panel, MC303 is locked. Any key of

MC303 is invalid until “HEATER” and

“SLEEP” key is pressed for 5s again.

• While LCD panel is locked, MC303 still checks and displays each indoor’s unit status.

25


5.0 CONTROLLER SETTING

5.1 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 / J2*

* Available on J2 PCB version T4 and above

Controller Configuration

5.2 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 c. Cycle of low fan running for 30s and fan off for 120s and repeat (INTERVAL). temperature < 30°C and stop if indoor coil temperature < 18°C (ON).

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

26

MCQUAY Service Guide Book Controller Configuration

.

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 will run at low speed.

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

L208A / LWS2.0 models

There are 2 tables setting for HT_KP & MODEL jumpers as shown as below. 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 will run at low speed.

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

For L208A jumper setting

Pin 1&2 MS

Pin 2&3 INTVL

Open ALWY

ON

OFF

-

For LWS2.0 jumper setting

MODEL HT_KP

Pin 1&2 Single

Pin 2&3 Tandem

ON

OFF

Open DX INTVL

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).

27


5.3 Sequential Board (SQ2.0)

Dip switch setting of sequential controller are as the following:

Main Board SQ2.0

1. Models Selection

Model a. No heater b. 1 heater c. 2 heater

Dip switch 1

Off

On

On/Off switch 2

Where n = no. of compressor(s)

Postfix no. = no. of heater(s)

Dip

Off

Off

On

2. Stage Differential Temperature

Differential temperature is the temperature difference between turning on or off a compressor to another compressor in thermostat cycle.

The stage differential temperature can be selected from the range shown below:

28

Controller Configuration a. Default b. 0.5°C c. 1.0°C d. 1.5°C

Dip switch 3 Dip switch 4

Off

On

Off

Off

Off

On

On

On

Note: 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.

1 compressor Not. Applicable

2 compressors

3 compressors

4 compressors

1.5°C

1.0°C

0.5°C

3. Operating Modes

The system has 4 operating modes to select with respect to each model selection:

Model Auto Cool Heat Fan Dip switch

5

SQCn - X - X Off

SQHnh - X X X Off

SQHnh X X X X On

Where x denotes modes available n = no. of compressor(s) h = no. of heater(s)

4. Hot Keep Option

a. Fan off b. Fan on

Dip switch 6

Off

On

5. Last Memory Functions

The power up settings for either with or without the last memory Backup is based on the J_LST setting.

Setting a. Last memory Backup b. W/o last memory Backup

J_LST Plugged

J_LST Removed

*For SQ1.0, the jumper is JH1.


6. Defrost Option

Select whether compressor will turn off or remain on when 4WV changes at beginning of defrost cycle. a. Compressor off b. Compressor on

Dip switch 8

Off

On (C2.4 spec)

7. Summary of Models available

SQCn

SQHnh

Cooling Only model

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

Factory preset (default setting)

Model S1 S2 S3 S4 S5 S6 S7 S8

SQCn Off Off Off Off Off Off Off Off

SQHnh On On Off Off On On Off On

8. Sequential Control

Cool Mode: The starting sequence for indoor fan, outdoor fan and compressors is shown as below:

2s

Start Indoor

15s 2s

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

2s 2s

All 4-way valves Start Indoor

15s 2s

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

29



5.4 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:

Heatpump

Valve

Valve less

√

X

HEAT jumper

√

√

Cooling Only

Valve

Valve less

√ X

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.

VALVE Jumper.

Switch Board W1V3


Model: MCK 20-50AW, MCK 15-25BW, MCK 10-

20CW, MCM 20-50DW and MCC 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.

HEAT Jumper

VALVE Jumper

Main Board W1V3

30


5.5 Chilled Water Fan Coil Unit (W2.0)

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

Operating Modes Jumper Configurati on

Pipes without Aux.

Heater

Heat>Cool>Dry>Fan

Heat>Cool>Dry>Fan Pipes

Aux. Heater

Pipes

Boiler

Pipes

Boiler

Heat>Cool>Dry>Auto

>Fan

Heat>Cool>Dry>Fan

M1

M2

M3

M4

W2 Main Board

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

Heatpump

Valve

Valve less

√

X

HEAT jumper

√

√

Cooling Only

Valve

Valve less

√ X

X X

√ : Jumper Remained X : Jumper Removed

VALVE & HEAT Jumper Location

Model: MWM - G2W / 301W

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

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

31


Valve

Jumper

Heat

Jumper

MWM 07/10/15G2W

Heat

Jumper

Valve

Jumper

MWM 20/25G2W / 301W

Model: CK - AW/MWH/CW, CE - DW/CBW/EW

and CC - CW

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.

Heat

Jumper

Valve

Jumper


5.6 Hardware Setting – SLM8

There are 2 jumpers on SLM8 option to control the board function as shown in Picture below.

20-30C

TURBO_

QUIET

Summary of Hardware Setting as table below:

Jumper Short Open

20-30C

(Set Temp

Range)

20°C – 30°C 16°C – 30°C

(Default)

TURBO_

QUIET*

Disable turbo & quiet fan speed

(Default)

Enable turbo & quiet fan speed

* Only applicable to model with built in Turbo or

Quiet features.

32



6.0 CONVERSION CONFIGURATION

6.1 Auxiliary Heater Conversion

U1.5 Heatpump with Auxiliary Heater

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

2. Transistor,

3. Diode, IN4003


RLY 8

D17

Q3

Board U1.5 Heatpump with Auxiliary Heater

33

MCQUAY Service Guide Book Controller Configuration

SB125 Heatpump with Auxiliary Heater

To convert SB125 heatpump PCB to auxiliary heater application, only need to add one heater

Re relay as shown below:

1. Place the JM Relay (240V/20A) on the

RY_HTR location

2. Solder all the relay pins.

SB125 Heatpump with Auxiliary Heater

RY_HTR

34


W2 Heatpump with Auxiliary heater

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

Step 1:-

Place the shunt jumper at jumper header M2.

1. Shunt jumper

2. JM Relay 240VAC/ 20A


M2

Step 2:-

1. Place the JM relay at RY_HTR location

2. Solder all the relay pins

RY_HTR

W2 Heatpump with Auxiliary Heater

35


6.2 Multi Split Conversion

Cooling Only Model (L2.0 / L208A)

MWM-G, MCK-A/B/C/E, MCM-E, MCC-C which are using L2 control board can be switched to multi split units without any modification needed.

Heatpump Model (L2.0)

MWM-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.

36


Heatpump Models (L208A)

MCK-AR/BR/CR/ER, MCM-ER, MCC-CR

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.


6.3

U1.5 Æ L208A Conversion

All single split indoor units with U1.5 PCB cannot be directly replaced by the new L208A PCB because of the following:-

MCK/M5CK-A/AR & MCK/M5CK-C/CR

U1.5 - The connector on the PCB (CN6) for the inter-connector cable has 16 pins.

L208A - The connector on the PCB (CN5 & CN6) for the inter-connector cable have 12 & 2 pins.

MCM/A5CM-D/DR & MCM/A5CM 062C/CR

U1.5 - The connector on the PCB (CN6) for the assy. LED cable has 16 pins

L208A - 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-R0094.

The L2 Spare PARTs Package contains the following items:-

Item 1 & 5


1. L2 08A Heat Pump PCB.

2. Room sensor, indoor coil sensor interconnector wire, outdoor coil sensor interconnector 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 MCM/M5CM-D/DR and

MCM 062C/CR models with originally using U1.5

PCB.

Item 6

Item 3

Item 4

Item 7

PART Number: PI-C-R0094

37


6.4 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.

2. 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

Display

Panel


3. only the display panel or On/Off switch board from U1.4 to L2EF or L2EF to U1.4.

4. 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

ON/ OFF switch board

Display Panel

L2EF PCB: Comes with display panel and ON/OFF switch board

38


6.5 SQ Board for Wiring up to 1000m Conversion

Comparison of Sequential Main Board SQMB01 Before & After conversion:


U8

J1

J2

Before

After

Work Indication (WI):

Step 1: Remove Jumper J1 and J2.

Step 2: Solder PART 2051-MAX1483

(IC: MAX1483) to U8.

PART: 2051-MAX1483

IC :MAX1483

IC:MAX1483

J1 removed

J2 removed

Jumper J1 and

J2 removed

Enlarge view of SQMB01 after conversion

39


Sequential LCD conversion for wiring up to 1000m

Work Indication (WI):

Step 1: Dismantle the BACK cover of Sequential LCD.

Step 2: Remove Jumper J1, J2.

Step 3: Add Chip Resistor 1/10W 5% 200K to R8, R9 and R10.

Step 4: Add PART 1000000030 IC: SMD MAX1438CSA to U4.

J2

R8, R9, R10

U4 J1

BACK View of Sequential LCD


40


6.6 Room Sensor on Netware 3

There is a temperature sensor located at TH1 on the Netware 3 controller board as shown in the picture below. The temperature sensor is optional and can be used as room sensor, so that room temperature reading will be captured from the temperature sensor on the wired controller

Netware 3 instead of room sensor located at indoor PCB.

TH1

BACK view of Netware 3

If the temperature sensor TH1 is required to be used as room sensor, please follow the Work

Indicator in the following:

Step 1: Turn off the main power supply.

Step 2: Remove room sensor extension from the indoor PCB.

Step 3: Turn on the main power supply and switch on the indoor unit. Room temperature reading is now taken from temperature sensor at the wired controller Netware 3.

Remove this

Room

Sensor

L208A PCB

41


Continuously

Once every 2s

Twice every 2s

3 times every 2s

ON


7.0 SERVICE DIAGNOSIS

7.1 LED Lights Diagnosis Table

Wall Mounted F Series Cooling Only

Model Board Handset

MWM 10/15/20/25F, 311 D2.0

MWM 07/10/15/20/25F L2EF

POWER

(Green)

/

SLEEP

(Red)

TIMER

(Orange)

DRY

(Orange)

G7

G7

Operation / Faulty

Indication

/ ON or OFF

/

Action

Diagnosis

-

-

Dry mode -

Defrost mode -

Room air sensor contact loose / short

Indoor coil sensor contact loose / short

Gas leak

Check room sensor connection / change room sensor

Check indoor coil sensor connection / change indoor coil sensor

Check for leakage & repair / Top up refrigerant

BLINKING

42


Wall Mounted F Series Heat Pump

Model Board Handset

MWM 10/15/20/25FR, 301R

COLD

(Green)

DRY

(Orange)

FAN

(Green)

HEAT

(Red)

U1.5

MWM 07/10/15/20/25FR, 311/301R L2EF

SLEEP

(Red)

G7 / SLM3 / Netware 3 / SLM8

G7

Error Code

(SLM3 /

Netware 3)

Operation /

Faulty

Indication

/

Action

Diagnosis

-

-

-

/

-

/

/ -

-

Auto mode in heating operation

Auto mode in cooling operation

-

-

Heat LED blinking

(SLM3 only)

Defrost mode -

E1

E2

E3


Indoor coil sensor contact loose / short

Outdoor coil sensor contact loose / short



Check outdoor coil sensor connection / change outdoor coil sensor

If running ampere highly increase, change the compressor

E4

Compressor overload protection


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.*

Note: * Only applicable for L2EF Board.

43


Wall Mounted G Series

Model Board Handset

MWM 10/15/20/25G/GR L2.2 G17 / SLM3 / Netware 3 / SLM8

SLEEP

(Red)

POWER

(Green/Red)

TIMER

(Orange)

IONIZER

(Green)

Error

Code

(SLM3 /

Netware 3)


Indication

/ /

/

/

/

Green

Red

Red

Green

/

/

/

-

-



- Sleep On

/

/ - Fan On

ON

1 time

2 times

3 times

Red

/

1 time

3 times

6 times

ON or OFF

Action

Diagnosis

-

-

-

-

-

-

-

-

-

E1

E2

E3

E4

E8

Dry mode On


Indoor coil sensor contact open

Outdoor coil sensor contact open


/ Indoor / Outdoor coil sensor short

Hardware error

(tact switch pin short)

BLINKING

-




If running ampere highly increase, change the compressor. If not, replace the coil sensor

-

Check for leakage & repair

/ Top up refrigerant

Check for the tact switch pin condition

44


Wall Mounted J Series

Model Board Handset

MWM 09/15J/JR L2GSN G17

SLEEP

(Red)

/

POWER

(Green/Red)

Green

TIMER

(Orange)

Error

Code


Indication

/

/

/

Red

Red

Green

-

-



Action

-

-

-

-

-

Diagnosis

-

- Fan mode On -

1 time

E1


2 times

E2


3 times E3


1 time

E4

Compressor overload /

Indoor coil sensor short /

Outdoor coil sensor short

Red

4 times

3 times

6 times

E8

E9

Hardware error (tact switch pin short)

No Feedback from indoor fan

5 times

ON

/

ON/ OFF Blinking

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

-





-

Check for leakage & repair /

Top up refrigerant


Check indoor fan motor / fan motor wiring

-

45


Ceiling Cassette A / B / C Series Model

Model Board Handset

MCK 20/25/30/40/50A/AR U1.5 G7 / SLM3 / Netware 3 / SLM8

MCK 15/20/25B/BR

MCK 10/15/20C/CR

U1.5

U1.5



POWER

(Green)

TIMER

(Orange)

SLEEP

(Red)

HEAT

(Red)

Error Code

(SLM3 /

Netware 3)

Operation /

Faulty Indication

Action

Diagnosis

-

-

-

-

Continuously

/ blinking

(SLM3 only)

Frost prevention mode

Once every 3s

E4


Twice every 3s

3 times every 3s

4 times every 3s

E1/E2/E3

Room / indoor / outdoor coil sensor contact loose / short

ON / ON or OFF BLINKING

-


Clear the clogging at drain pipe. If pump is not working, change the pump



Check room/indoor/ outdoor coil sensor connection / change room/indoor/outdoor sensor

46


Ceiling Cassette A / B / C/ E Series Model

Model Board Handset

MCK 20/25/30/40/50A/AR

MCK 15/20/25B/BR

MCK 10/15/20C/CR

MCK 20/25/28/40/50E/ER

L208A

L208A



L208A GS01 / G17 / SLM3 / Netware 3 / SLM8

L208A GS01 / G17

POWER

(Green)

TIMER

(Orange)

SLEEP

(Red)

HEAT

(Red)

Error Code

(SLM3 /

Netware 3)


Indication

1 time

2 times

3 times

ON

1 time

2 times

3 times

5 times

6 times

/ ON or OFF

Action

Diagnosis

-

-

-

-

E1

E2

E3

E4

E7

E8

-

-






Compressor overload protection /

Indoor coil sensor short / Outdoor coil sensor short

Outdoor coil sensor exist (MS model)


-

-







Remove outdoor coil sensor

Replace the tact switch control board

BLINKING

47


Ceiling Exposed D Series Model

Model Board Handset

MCM 20/25/30/40/50D/DR U1.5 G7 / SLM3 / Netware 3 / SLM8

COOL

(Green)

DRY

(Orange)

FAN

(Green)

HEAT

(Red)

Error Code

(SLM3 /

Netware 3)


Indication

ON / ON or OFF

Action

Diagnosis

-

-

-

-

-

-

Heat LED blinking

(SLM3 only)

E1

E2

E3

E4



Defrost mode

-

-

-


Indoor coil sensor contact open / short

Outdoor coil sensor contact open / short







Top up refrigerant

BLINKING

48


Ceiling Exposed D / E Series Model

Diagnosis

MCM 20/25/30/40/50D/DR

MCM 15/20/25/28E/ER

COOL

(Green)

DRY

(Orange)

FAN

(Green)

L208A

L208A

HEAT

(Red)



Error Code

(SLM3 /

Netware 3)


Indication

ON

Blink Heat, Cool, follow by Fan, Dry

/ ON or OFF

Action

-

-

-

-

-

E1

E2

E3

E4

E7

E8

-






Compressor overload protection /

Indoor coil sensor short / Outdoor coil sensor short

Outdoor coil sensor exist (MS model)


-

-







Remove outdoor coil sensor

Replace the tact switch control board

BLINKING

49

MCQUAY Service Guide Book Diagnosis

Chilled Water Fan Coil Unit

Model Board Handset

MWM 05 – 25FW, 301W

MCK 20 – 50AW/MWH

MCK 15 – 25BW

MCK 10 – 20CW

MCM 20 – 50DW/CBW

MCC 10 – 60CW

MDB 75 – 150BW

Self Diagnostic Table – W1V3

W1V3

W1V3

W1V3

W1V3

W1V3

W1V3

N/A






SLM3 / Netware 3 / SLM8

No Controller

Fault Indication

Room sensor missing

POWER LED

/ COOL LED

Other LEDs

Blinks 4 times FAN blinks

Error

Code

Action

E1 Check room sensor connection / change room sensor

Indoor coil sensor missing Blinks 4 times SLEEP blinks

Pump fault Blinks 2 times COOL & FAN blink

Pipe water temperature poor

Pipe water temperature fault

Blinks 3 times COOL & DRY

Blinks 1 time blink

COOL blinks E5

Model Board Handset

E2 Check indoor coil sensor connection / change indoor coil sensor

E6 Clear the clogging at drain pipe. If pump is not working, change the pump

E4

-

-

MWM 07 – 25G2W

MWM 301W

MCK 20 – 50AW/MWH

MCK 15 – 25BW

MCK 10 – 20CW

MCM 07 – 15CBW

MCM 20 – 50DW

MCM 15 – 25EW

MCC 10 – 60CW

MDB 75 – 150BW

Self Diagnostic Table – W2

W2

W2

W2

W2

W2

W2

W2

W2

W2

N/A









SLM3 / Netware 3 / SLM8

No Controller

Fault Indication

Room sensor error (short/open)

COOL LED

Blink 1 time

Error

Code

E1

Action

Pipe water sensor error (short/open)

Water pump error


Window open activated*

Antifreeze mode activated*

Load shedding activated*

*Applicable for 4 pipes applications only.

Blink 2 times

Blink 6 times

Blink 5 times

Blink 3 times

Blink 7 times

Blink 8 times

E2

E6

E5

-

-

-

Check room sensor connection / change room air sensor

Check pipe water sensor connection / change pipe water sensor


-

-

-

50


Water Source Split Unit – Wall Mounted G Series Model

Model Board Handset

M5WMWS 10/15/20/25GR LWS2.0 G17 / SLM3 / Netware 3 / SLM8

SLEEP

(Red)

POWER

(Green/Red)

TIMER

(Orange)

IONIZER

(Green)

Error Code

(SLM3 /

Netware 3)


Indication

/

/

/

/

Green

Red

Red

Green

1 time

2 times

3 times

Red

1 time

3 times

6 times

/

/

/

/

/

/

-

-



Action

Diagnosis

-

-

-

-

-

-

-

-

E1

E2

E3

E4





/ Indoor / Outdoor coil sensor short

-





Heat LED blinking

(SLM3 only)

Defrost mode -

E8

Hardware error

(tact switch pin short)




51


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

Diagnosis

M5CKWS 20/25/30/40/50AR

M5CKWS 10/15/20CR

POWER

(Green)

TIMER

(Orange)

HEAT

(Red)

LWS2.0

LWS2.0

Error Code

(SLM3 /

Netware 3)




Indication

1 time

2 times

3 times

ON

1 time

2 times

3 times

/ ON or OFF

-

-

E1

E2

E3

E4

Action

-

-

-




Indoor coil sensor contact loose / open

Outdoor coil sensor contact loose / open


-

-

Check room sensor connection

/ change room sensor






Top up refrigerant

BLINKING

52


Wall Mounted F Cooling Only Inverter-X Model

Model Board Handset

MWMX 10/15F VA2.0 G17 / SLM3

TIMER

(Orange)

SLEEP

(Red)

POWER

(Green)

/

DRY

(Orange)

Error

Code

(SLM3)


Indication

Timer On

Sleep mode On

E1

E2

E3

E4

E6

E7

E8

E9

Action

-

-

Diagnosis

Dry mode

Indoor temperature sensors contact loose / short

Outdoor temperature sensor contact loose

/ short

Communication error between indoor and outdoor


Gas leak / compressor overheat

Inverter error / PFC error

Outdoor total current trip / DC peak

Indoor fan feedback error

-



Check the connection wires between indoor and outdoor



Top up refrigerant

Check supply voltage and compressor phase

Check the input current and discharge pressure



53


Wall Mounted F Heatpump Inverter-X Model

Model Board Handset

MWMX 10/15FR VA2.0 G17 / SLM3

COOL/DRY

/

(Green)

HEAT

(Red)

STAND-

BY/FAN

(Orange)

TIMER

(Orange)

/

Error

Code

(SLM3)


Indication

/

--

Stand-by / Fan mode

/

/

-- Auto mode

E1

E2

E3

E4

E6

E7

E8

E9

Action

-

-

-

-

-

Diagnosis

Indoor temperature sensors contact loose / short

Outdoor temperature sensor contact loose / short



Gas leak / compressor overheat

Inverter error / PFC error

Outdoor total current trip / DC peak


-



Check connection wires between indoor and outdoor








54


Wall Mounted G Series Inverter-X Model

Model Board Handset

MWMX 10/15/20/25G/GR VA2.0 G17 / SLM3

SLEEP

(Red)

/

POWER

(Green/Red)

TIMER

(Orange)

IONIZER

/

(Green)

Error

Code

(SLM3)


Indication

/ / -

Heating mode / Standby mode (only for heat pump model)

/ /

- Auto mode in operation

ON

Red

Green

Green

Green

Green

/ ON or OFF

/

/

Action

-

Diagnosis

-

-

-

-

-

-

Fan mode On

Dry mode On

-

-

-

E1

-

E2

E3

E4

E6

Indoor temperature sensor loose / short

Coil temperature sensor loose / short

Outdoor temperature sensor loose / short



Compressor overheat / gas leak

E7

E8

E9

IPM / PFC error

Outdoor total current trip

/ DC peak


BLINKING

-


Check coil sensor connection / change coil sensor


Check the connection wires between indoor and outdoor






55


Ceiling Cassette A/C Series Inverter-X Model

4 times

5 times

6 times

1 time

2 times

3 times

MCKX 20/25A/AR VA3.0

MCKX 10/15/20C/CR VA3.0

POWER

(Green)

TIMER

(Orange)

SLEEP

(Red)

HEAT

(Red)

G17 / SLM3

G17 / SLM3

Error

Code

(SLM3)


Indication

E1

E2

E4

E6

E7





IPM / PFC / Partial switching


Action

Diagnosis

-

-

-

-

-










56


Ceiling Convertible E Series Inverter-X Model

G17 / SLM3

1 time

2 times

MCMX 15/20/25E/ER VA3.0

COOL

(Green)

DRY

(Orange)

FAN

(Green)

HEAT

(Red)

3 times

4 times

6 times

ON / ON or OFF

Diagnosis

Error

Code

(SLM3)


Indication

E1

E2

E3

E4

E6

E7

Action



Communication error




-

-

-

-

-






Top up refrigerant



BLINKING

57


Inverter - X Outdoor Unit

Model Board

MLCX 10/15/20/25C/CR

MMSV 25/35A

AMSX 20/25/30A/AR

VB2.0

VB2.0

VB2.0

Normal running / compressor running RED LED blinking

No. of Blinks Blinking Indication

1 Normal running, with no limitation

3

Cooling unit: outdoor coil temperature limit

Heating unit: indoor coil temperature limit

4 Total limit

6 Cooling unit: indoor coil temperature limit

Diagnosis

1

1

1

1

0

1

0

0

8 Outdoor frequency adjustment

Compressor stopped Error Indication

No. of Blinks

Red Yellow

Faulty Indication

0

0

0

0

1

2

4

5

Outdoor ambient sensor error

Outdoor coil sensor error

DC compressor feedback error

Communication error

No. of Blinks

Red Yellow

Faulty Indication

1

1

1

1

1

5

6

7

8

9

DC fan motor feedback error

AC peak current error

Outdoor suction sensor error

None

DC compressor speed control error

7

8

9

0

1

2

3

4

No load

Over / under voltage

DC compressor start failure

Cooling overload

Defrost

IPM protection

Read EEPROM error

Write EEPROM error

3

3

3

3

2

2

2

2

1

2

3

4

1

2

3

4

Outdoor suction pipe A sensor error

Outdoor suction pipe B sensor error

Outdoor suction pipe C sensor error

Outdoor suction pipe D sensor error

Communication error with indoor A

Communication error with indoor B

Communication error with indoor C

Communication error with indoor D

58


Inverter-Y Model Indoor Series

Model

M5WMY 10/15/20/25 JR

M5CKY 10/15/20CR

M5CKY 20/25/28/40/50 ER

A5CMY 62 CR

A5CMY 20/25/28/40/50 ER

Board Handset

W_2_03A

C_2_01A

C_2_01A

C_2_01A

C_2_01A

M5CCY10/15/20/25/28/38/50/60 CR C_2_01A

GS01 / G17

GS01 / G17 / Netware 3C


GS01 / Netware 3C


Netware 3C

SLEEP

(Red)

COOL/HEAT

(Green/Red)

TIMER

(Orange)

Operation / Faulty Indication

Green

Red

Cooling mode

Heating mode


Red

Green


Time Off (when unit is on)

Time On (when unit is off)

Sleep mode on

Green

Green

Red

Green

Fan mode on

Dry Mode on

Defrost operation

Error indication

ON Blinking

59

Diagnosis


Single Split Inverter – Y Outdoor Unit

Diagnosis

Model

M5LCY 10/15 DR

Board

S_2_03A

M5LCY 20/25 CR S_2_04A

M5LCY 30/40/50/60 FR -

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

Unit in normal operating mode

Display on 7-segment

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).

Unit is in fault 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).

1. Unit Running Parameters:

Parameter

Number

Parameter Description actual

01 Compressor

04 Outdoor

05 Outdoor heat exchanger temperature

Unit/ Range r/s r/s

VDC

A

°C

°C

07 Outdoor heat sink temperature

08 Indoor

09 Indoor heat exchanger temperature

°C

°C

°C

°C

Pulse

2. Error Codes (HAP: Microcomputer in operation; H3P: Error Detection):

LED INDICATION

HAP H3P

Green Red

○

●

●

-

-

Description

Normal

Faulty Outdoor Unit PCB Board

Power Supply Abnormality or Faulty Outdoor PCB Board

○ Activation of Protection Device

HAP: Microcomputer in normal operation

H3P: Error Detection

Blinks

●

Off

○

On

60


Multi Split Inverter – Y Outdoor Unit

Model

M5MSY 20/25/30 BR

Board

-

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

Diagnosis

LED INDICATION

Green Red Description

A 1 2 3 4

● ● ● ● NORMAL

INSTALLATION ERROR

ANTIFREEZE (OTHER ROOMS)

● ● ● ○ HEAT SINK OVERHEAT

● ● ○ ● IPM ERROR / IGBT ERROR

● ● ○ ○ INSUFFICIENT GAS

● ○ ● ○ AC INPUT OVER CURRENT

● ○ ○ ● COMPRESSOR STMRT-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

Blinks

●

Off

○

On

61


7.2 Error Codes Diagnosis By Handset

SLM 3 / Netware 3 / SLM 9 – On/Off Models

Error Code Faulty Indication

E1

E2

E3

E4

E5

E6

E7

E8

LO

HI

Diagnosis




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

Gas leak

Water Pump fault*

Outdoor coil sensor exist (Multi-split model)


Room temperature below 8ºC(46 ºF)

Room temperature above 37ºC(99 ºF)

OP Working room sensor is open

SH Working room sensor is short

HEAT LED

Defrost mode (SLM3 only) blinking

*Applicable for Ceiling Cassette Model only.

*SLM 3 and SLM 9 only display Error Code E1 to E6.

SLM 3 / Netware 3 – Fan Coil Unit

Error Code

E1

Faulty Indication

Room sensor short / open

E2

Pipe water sensor short / open

E4 Pipe water temperature poor

E5


E6

Water pump fault

SLM 3 – Inverter X Models

Error Codes Faulty Indication

E5

E6

E7

E8

E9

E1

E2

E3

E4



Communication error


Pump fault



Outdoor over current


62


Netware 3C / SLM 9 – Inverter Y Models (Except 5WMY-J/JR)

Error

Code

Faulty Indication

Error

Code

Faulty Indication

00 Normal H9 Outdoor air thermistor short/open

A1 Indoor PCB error

A3 Drain pump fault

Diagnosis

J1 Pressure sensor error

J3

Compressor discharge pipe thermistor short/open/misplaced

A5

Antifreeze(Cooling) / Heat exchanger overheat(Heating)

J5 Suction pipe thermistor short/open

A6 Indoor fan motor fault

AH Electrical air cleaner fault

J6

J7

Outdoor heat exchanger thermistor short/open

Sub cooling heat exchanger thermistor short/open

C4

C5

Indoor heat exchanger (1) thermistor short/open

Indoor heat exchanger (2) thermistor short/open

C7 Louver limit switch error

C9 Indoor room thermistor short/open

E1 Outdoor PCB error

E3 High pressure protection

E4 Low pressure protection

E5

Compressor motor lock/compressor overloaded

J8 Liquid pipe thermistor short/open

J9 Gas pipe thermistor short/open

L1 Inverter outdoor PCB error

L3 Outdoor control box overheat

L4 Heat sink overheat

L5 IPM error/IGBT error

L8 Electrical thermal switch

L9 Stall prevention

E6 Compressor start-up error

E7 Outdoor DC fan motor lock

E8 Ac input over current

E9 EXV error

EA 4 way valve error

F3 Discharge pipe overheat

F6 Heat exchanger overheat

HO Compressor sensor system error

H3 High pressure switch error

H6 Compressor feedback detection error

H7

Fan motor overloaded/over current/sensor fault

H8 AC current sensor error

LC

Communication error (outdoor PCB & inverter PCB)

P1 Open phase or voltage unbalance

P4 Heat sink thermistor short/open

PJ Capacity setting error

U0 Insufficient gas

U2 DC voltage out of range

U4 Communication error

U7

Communication error (outdoor PCB & IPM

PCB)

UA Installation error

UF

Piping & wiring installation mismatch/wrong wiring/insufficient gas

UH Anti freeze (other rooms)

63


Sequential Controller (SQ LCD) – SB & RT Multi Compressors

Error

Code

Faulty Indication

Error

Code

Faulty Indication

E01 Require manual reset (possible causes)

E02 Compressor 1 high temperature (overload)




E06 Compressor 1 high pressure trip / contact open




E10

E11

E12

E13

Compressor 1 trip/low refrigerant/outdoor abnormal




E14 Room sensor short

E15 Room sensor open

E16 Indoor coil sensor 1 short




E20 Indoor coil sensor 1 open




E24 Outdoor coil sensor 1 short




E28 Outdoor coil sensor 1 open




E32 Compressor 1 de-ice




Diagnosis

64


Rooftop Panel

Alarm Shown On The Rooftop Panel

• Whenever panel received a new alarm, an alarm message will pop up on the LCD. It shows type of alarm, alarm occurred time and date. Backlight blinking (if Backlight is not OFF) and alarms buzzer produces beeping sound (if it’s set ON). The buzzer will beep for 10 minutes after that stop for 5 minutes (with the

Backlight still blinking), this process keep looping until the alarm is dissolved or a key press is detected.

• Backlight will stop blinking via key press. Press UP or DOWN key to scroll the alarms display if more than one alarms occurred. Press ESC to exit to the summary pages.

• If one of the alarms has been dissolved, pop up message will update its display (would not show the dissolved alarm anymore). If all the alarms have been dissolved, it will exit to the summary pages automatically.

• If the existing alarm has not been dissolved and another new alarm is occurred, the pop up message will update to the latest alarm.

• A sign [A] will be shown and blink in Summary Pages as long as the alarm has not been dissolved. If user needs to view current existing alarms, press “ALARM” key in the summary pages or go to ALARM MENU in

MAIN MENU.

• The panel can display up to 20 new alarms at once (which are not dissolve yet).

• All the incoming new alarms record will be store in ALARM MENU – Show Alarms.

• The alarm histories are viewable ONLY when all the new alarm already dissolved.

• If the contact type alarm is set to manual reset, the alarm can only be dissolved by off and on BACK rooftop unit.

Error Message

1. MB & economizer communication fail

2. Memory Error

3. Economizer Error

4. ESD contact open

5. Compressor 1 / 2 overload

6. Compressor 1 / 2 low pressure trip

7. Compressor 1 / 2 high pressure trip

8. Compressor 1 / 2 discharge overheat

Possible causes

Communication wires not connected

External noise / interference

Main PCB / Economizer PCB faulty

EEPROM data corrupted

Refer to the economizer board error code table.

Normally close ESD contact become open

Insufficient airflow / Air short circuit

Heat exchanger dirty

Action

Connect correctly and operate again.

Avoid from noise source / add ferrite core.

Replace main PCB / economizer PCB.

Replace main PCB and operate again.

Refer to the economizer board error code table.

ESD contact shorted with wired. If fail, replace main board and operate again.

Ensure no obstacle around the unit.

Refrigerant overcharge / undercharge

Condenser fan motor faulty

EXV or EXV PCB defective

Compressor malfunction

Main PCB faulty

Refrigerant undercharge

Ensure no dirt or dust on filter and coil.

Recharging with correct amount of refrigerant.

Replace fan motor.

Replace EXV or EXV PCB.

Replace compressor.

Replace main PCB.

Top up with correct amount of refrigerant.

Pressure switch faulty

Main PCB faulty


Heat exchanger dirty


Refrigerant overcharge

EXV or EXV PCB faulty

High Pressure switch faulty

Replace pressure switch.

Replace main PCB.



Replace fan motor.

Recharging with correct amount of refrigerant.

Replace EXV or EXV PCB.

Replace pressure switch.

Main PCB faulty Replace main PCB.

Discharge sensor malfunction Replace new discharge sensor.



Heat exchanger dirty Ensure no dirt or dust on filter and coil.

65


9. Disconnection of discharge thermistor 1 / 2

10. Heat Exchanger 1 / 2 high temperature

11. Indoor HEX 1 / 2 abnormal temperature

12. Indoor fan overload

13. Return air sensor short / open

14. Outdoor air sensor short / open

15. Comp discharge sensor

1 / 2 short

16. Comp discharge sensor

1 / 2 open

17. Outdoor HEX sensor 1 /

2 short

18. Outdoor HEX sensor 1 /

2 open


Main PCB faulty

Poor sensor connection

Discharge sensor malfunction / poor sensor connection

Insufficient Air Flow / Air Short

Circuit

Heat Exchanger Dirty




Main PCB faulty

Poor coil sensor connection


Leaking in piping joint


Main PCB faulty

Motor internal over current protection faulty

Winding resistance out of spec

Fan motor short body

Main PCB faulty

Faulty Sensor / Poor sensor connection






Replace fan motor.

Replace main PCB.

Connect correctly and operate again.

Connect sensor correctly / replace sensor.



Replace new motor

Replace new compressor.

Replace new EXV.

Replace main PCB.

Connect sensor correctly / replace new sensor.

Replace new compressor.

Fix the leak point / Change coil.

Replace new EXV.

Replace main PCB.

Replace indoor fan motor.

Replace main PCB







19. Indoor HEX sensor 1 / 2 short

20. Indoor HEX sensor 1 / 2 open





There are two LEDs in economizer controller board, which are green LED and red LED. Green LED will blink when economizer controller board is powered-up. Red LED will blink when error(s) occur. Refer the table below for error codes and their meaning:-

Note:

All the errors occur in economizer controller board will not affect the normal operation of rooftop unit.

66


Chiller Panel – Air Cooled Mini Chiller

When malfunctioning occurred, the display LCD will blink. The display will show the faulty parameter and the date and time of the occurrence.

When a malfunction of the unit is detected, immediately switch off the main power supply before proceeding with the following troubleshooting procedures.

67


G17 – Inverter Y Models

Temperature

Display Section

Diagnosis

MODE 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.

Error Code Diagnosis by Unit Last State Memory

(A) Wireless Handset G17

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

(B) Wired Handset Netware3C

1. Press SLEEP and TIMER ACTIVE buttons together for 5s

2. Panel will blink LED twice and beep buzzer

3. If there is an error code, Minutes column “ ” will be replace by blinking “Er” and error code will be shown on the right of fan speed indicator area for 60s before return to normal operation

4. During this 60s, the interval keypad will be locked

5. However, user is allowed to terminate this waiting state by pressing SLEEP and TIMER ACTIVE buttons again for 5s or simply pressing ON/OFF button.

68


GS01 – Inverter Y Models

Diagnosis

Diagnosis Step

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



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

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 GS01

69


Error Codes for G17 and GS01 – Inverter Y Models

Error

Codes

00 Normal

Error Description

U0 Insufficient gas

Diagnosis

Error

Codes

Error Description

F3 Discharge pipe overheat

F6

Heat exchanger overheat

H0 Compressor sensor system abnormality

H3 High pressure switch error

U2 DC voltage out of range

U4 Communication error

U7

Signal transmission error (on outdoor unit PCB)

UA Installation error

UF

Communication Error (indoor and outdoor) piping and wiring

H6 Position sensor abnormality

H8 AC current sensor error

H9 Outdoor air thermistor short / open

UH Anti-freeze function in other room J1 Pressure sensor error

J3

Compressor discharge pipe thermistor short /open / misplaced

J5 Suction pipe thermistor short/ open

J6 Outdoor heat exchanger

J7

Subcooling heat exchanger thermistor short/ open

A1 Indoor PCB error

A3 Water pump error

A5 Antifreeze

A6 Indoor fan motor abnormal

C4

Indoor heat exchanger thermistor short/

C9 Indoor room thermistor short/ open

E1

Outdoor PCB error

E3

High pressure protection

E4

Low pressure protection

E5

Compressor motor lock

E6

Compressor start-up error

E7

Outdoor DC fan motor lock

E8

Ac input over current

E9 EXV error

EA

4-way valve error

J9 Gas pipe thermistor abnormality

LC

Communication error (control PCB and inverter PCB)

L1

Outdoor PCB error

L3

Electrical box temperature rise

L4

Heat sink overheat

L5

IPM error / IGBT error

L9

Stall prevention

P1

Open phase or voltage unbalance

P4 Heat sink thermistor short / open

PJ

Capacity setting error

70


APJ1 –M5WMY10/15KR

Indoor LED Indication

Diagnosis

Timer Cancel

The operation lamp (green) 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.

Diagnosis Step

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



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.

Error Codes:

Error

Code

SYSTEM

Description

00 Normal

UA Indoor-Outdoor combination fault

U0 Refrigerant Shortage

U2 Drop voltage or main circuit overvoltage

U4

Failure of transmission (between indoor and outdoor unit)

INDOOR UNIT

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

OUTDOOR UNIT

EA Cooling-Heating switching error

E1 Circuit board fault

E5 OL started

E6 Faulty compressor start up

Error

Code

OUTDOOR UNIT

Description

E7 DC fan motor fault

E8 Over current input

F3 High temperature discharge pipe control

F6 High pressure control (in cooling)

H0 Sensor fault

H6

Operation fault due to faulty position detection sensor

H8 DC current sensor fault

H9 Faulty suction air temperature sensor

J3

J6

Faulty discharge pipe temperature sensor

Faulty heat exchanger temperature sensor

L3 Electrical Part heat fault

L4

High temperature at Inverter circuit heat sink

L5 Output over current

P4

Faulty Inverter circuit heat sink temperature sensor

71


7.3 MDS Diagnosis

(A)Indoor Units

Model Board Handset

A(5)WMD 09/10/15/20/25 G MC201-C G17

A(5)CKD 20/25/30/40/50 A

A(5)CKD 10/15/20 C

A(5)CMD 20/25/28 E

A(5)CMD 40/50 D

A(5)CMD 62 C

A(5)CCD 10/15/20/25/30/40/50/60 C

A(5)DBD 80/100

MC201-C

MC201-C

MC201-C

MC201-C

MC201-C

MC201-C

MC201-A

G17

G17

G17

G17

G17

MC301

MC301

Error Diagnosis by Indoor Unit LED Indicator

ITEM TYPE COOL / HEAT

(Green / Red)

SLEEP / FAN

(Red / Orange)

1 Indoor Sensor Error

● ●

TIMER / DRY

(Orange)

2 Indoor Pump Error

●

●

●

●

●

6 Pressure Switch Trip

7 Pressure Sensor Error

●

●

○

●

○

○

9 Others

6

7

8

9

2

3

4

5

10

11

12

13

14

15

16

17

● OFF ○ ON BLINK

Error Diagnosis by Wired Controller (MC301)

ITEM CODE DESCRIPTION

1 E0 System malfunction

E1 Sensor Broken (TH1 discharge Temp.)

E2 Sensor Broken (TH2 inlet coil 1#)

E3 Sensor Broken (TH3 mid coil 1#)





E8 Sensor Broken (TH8 ambient temp)

E9 Sensor Broken (TH9 outlet coil)

EA Sensor Broken (TH10 subcool outlet)

EB Sensor Broken (TH11 subcool suction)

EC Sensor Broken (TH12 suction)

EF Emergency Run

F0 Outdoor Storage Malfunction

F1 Sensor Broken (indoor inlet coil)

F2 Sensor Broken (indoor mid coil)

72

Diagnosis


Error Diagnosis by Wired Controller (MC301)


18 F3 Sensor Broken (indoor outlet coil)

40

41

42

43

44

45

46

47

48

49

34

35

36

37

38

39

24

25

26

27

28

29

30

31

32

33

19

20

21

22

23

54

55

56

57

58

59

50

51

52

53

60

61

62

63

64

65

66

F4 Sensor Broken (indoor return air)

F5 Sensor Broken (indoor supply air)

F6 Indoor and controller communication malfunction

F7 Ambient temp exceed the limit

F8 4WV malfunction

F9 Refrigerant leakage

FA Controller storage malfunction

FB Water Pump (indoor water pump)

FC Indoor and outdoor communication malfunction

FE Master and slave communication malfunction

H0 Digital comp overload

H1 Fixed Comp1 overload



H4 High pressure too high

H5 Sensor broken, high pressure

H6 Discharge temp too high

L0 Super heat too low

L1 Low pressure too low

L2 Sensor broken, low pressure

10 System malfunction

11 Sensor broken (slave TH1 discharge temp)

12 Sensor broken (slave TH2 inlet coil 1#)

13 Sensor Broken (slave TH3 mid coil 1#)


15 Sensor broken (slave TH5 mid coil 2#)


17 Sensor broken (slave TH7 mid coil 3#)

18 Sensor broken (slave TH8 ambient temp)

19 Sensor broken (slave TH9 outlet coil)

1A Sensor broken (slave TH10 subcool outlet)

1B Sensor broken (slave TH11 subcool suction)

1C Sensor Broken (slave TH12 suction)

1F Emergency run (slave)

20 Outdoor storage (slave)

27 Ambient temp exceed the limit (slave)

28 4WV malfunction (slave)

29 Refrigerant leakage (slave)

30 Digital comp overload (slave)

31 Fixed comp1 overload (slave)

32 Fixed comp2 overload (slave)

33 Fixed comp 3 overload (slave)

34 High pressure too high (slave)

35 Sensor broken, high pressure (slave)

36 Discharge temp too high (slave)

40 Super heat too low (slave)

41 Low pressure too low (slave)

42 Sensor broken, low pressure (slave)

73

Diagnosis


(B) Outdoor Units

6

7

8

9

2

3

4

5

10

11

12

13

14

15

Model Board Handset

MDS 30/40/50/60/70 A/AR

MDS 80/100/120/150/180/200/240/

260/300/320 B/BR

5MDS 80/100/120/140/160/180/

200/220/240/260/280/300/320/340/360

/380/400/420/440/460/480/500 B/BR

V4.0 – V4.5

V2.0 – V2.7

V2.1A – V2.6A

G17/ MC301

G17/ MC301

G17/ MC301

Error code diagnosis by PCB four Digit 7-Segment

MDS-A Series:


1 E0 Discharge temperature sensor malfunction

E1 Outdoor ambient temperature sensor malfunction

E2 Suction temperature sensor malfunction

E3 Compressor base temperature sensor malfunction

E4 Coil inlet temperature sensor malfunction

E5 Coil middle temperature sensor malfunction

E6 Coil outlet temperature sensor malfunction

E7 Compressor discharge temperature too high > 130⁰C

E8 General system failure

H1 High pressure trip

H2 Digital scroll compressor overload

H3 Fixed scroll compressor overload

L1 Low pressure trip

C- Communication failure between outdoor and all indoors

CX “X” indoor no. Particular indoor no communication

MDS-B Series:

ITEM CODE DESCRIPTION ITEM CODE DESCRIPTION

Diagnosis

0 EC00 00## indoor unit communication

1

EC01

01# indoor unit communication failure

2~47

….

02~47# indoor unit communication failure

48 ER48 Digital Compressor Overload

49

ER49

Fix 1 Compressor Overload

50 ER50 Fix 2 Compressor Overload

51

ER51

Fix 3 Compressor Overload

52

ER52

Discharge pressure too high

53 ER53 Suction pressure is too low

54

ER54

Outdoor unit’s IC error

62 ER62 Refrigerant released

63 ER63 Slaver outdoor unit communication failure

64 ER64 TH1 temperature sensor failure

65 ER65 TH2 temperature sensor failure

66

ER66

TH3 temperature sensor failure


68

ER68


69

ER69



71

ER71


55 ER55 System Error

56

ER56

Discharge temperature is too high

72

73

ER72

ER73



57

ER57 ER74


58 ER58 4 way valve failure

59

ER59

Ambient temperature is beyond the limit

60

61

ER60

ER61

Emergency run

Sub heating is beyond the limit

75 ER75

76 ER76


Discharge pressure sensor failure

77

ER77

Suction pressure sensor failure

78

EC78

All indoor units Communication

Failure

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

74


7.4 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

The unit does not work

Check the power supply

Check the fuse

Check the remote controller timer setting

Fan does not work Check the power supply

Suggested Action

Check to make sure that the rated voltage is supplied.

Check and replace the fuse.

Make sure the delay timer is set correctly.

Check the fan motor capacitor

Check the fan motor

Check to make sure that the rated voltage is supplied.

Check and replace the capacitor.

Check and replace the fan motor.

Fan work, but compressor does not work

Air conditioner work but cooling not satisfactory

Check the switch

Check if the thermostat setting too high

Check the compressor capacitor

Check the compressor

Check the compressor contactor

Check if the thermostat setting too high

Check if the condenser coil dirty

Check and change the switch.

Reset thermostat.

Check and replace the capacitor.

Check and replace the compressor.

Check and replace the contactor.

Reset thermostat.

The air flow is too low

The remote controller light is dim

Check the condenser installation condition

Diagnosis by service port pressure and operating Current

Check the air filter

Check the fan / blower condition

Check the battery

Clean the condenser coil.

Make sure the condenser is installed

According to factory’s recommendation.

Check for insufficient refrigerant.

Check and make sure the air filter is clean.

Check and make sure that the fan / blower are in good condition.

Check and replace the battery.

Make sure the batteries are correctly inserted.

75


7.5 General Troubleshooting Guide

By means of pressure readings:

Pressure Probable

Data

Circuit

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

Overcharged

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

3. Obstructed air-intake / discharge.

4. Short circuit of hot air at condensing unit.

Poor /

(compressor defective).

2. Check valve stick in open position.

3. Reversing valve leaking (for heatpump only).

Undercharged

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).

Outdoor

2. Outdoor coil dirty (cooling).

3. Indoor fan locked (heating).

4. Indoor filter clogged dirty (heating).

1. Air intake temperature of indoor unit too high.

76


APPENDIX

A. Resistance – Temperature Characteristics

Type

Material Name

DTN-C1 03F3H-OYL 1128, 1148, 1158

3H

Resistance R25=10.000kΩ + 1.0% - 1.0%

B Value B25/30=3450K + 1.0% - 1.0%

Appendix

-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

77


B. MDS Compatibility

Appendix

Indoor PCB vs Wired Handset MC301

Indoor

MC301

PCB

B1.5 B1.6 B.17 B1.8 B1.9 B2.0 B2.1 mc201_2.0 mc201_2.1 mc201_2.2 mc201_2.3 mc201_2.4 mc201_2.5 mc201_2.6 mc201_2.7

Indoor PCB vs Outdoor PCB

MDS-A/B 7HP and Below:

R22 / R410A

Outdoor

Indoor

PCB

PCB mc201_2.0

V4.0 V4.1 V4.2 V4.3 V4.4 V4.5 mc201_2.1 mc201_2.2 mc201_2.3 mc201_2.4 mc201_2.5 mc201_2.6 mc201_2.7

Remark: When V4.5 replacing V4.4 or below, discharge temperature sensor shall be changed to MIN JIE brand.

MDS-B 8HP and Above:

R22 R410A

Outdoor

PCB

Indoor

PCB mc201_2.0 mc201_2.1 mc201_2.2

2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.1A 2.2A 2.3A 2.4A 2.5A 2.6A 2.8A mc201_2.3 mc201_2.4 mc201_2.5 mc201_2.6 mc201_2.7

Remark: 1) When 2.6-2.7 replacing 2.5 or below and 2.5A-2.6A replacing 2.4A or below,

i) The discharge temperature sensor shall be MIN JIN brand.

ii) MIN JIE discharge temperature sensor shall be added to the slave unit’s main discharge pipe.

When 2.4-2.7 replacing 2.3 or below, dip switch setting for outdoor capacity might be different, details please refer to

Appendix B.

Compatible Not Compatible

Note: ONLY lower version PCB can be replaced by higher version; vice-versa is not allowable.

78


C. MDS Outdoor Capacity Dip Switch Setting

MDS-B PCB version 2.3 and below:

8HP 0 0 0 0

10HP 0 0 0 1

12HP 0 0 1 0

15HP 0 0 1 1

18HP 0 1 0 0

20HP 0 1 0 1

22HP 0 1 1 0

26HP 0 1 1 1

28HP 1 0 0 0

32HP 1 0 0 1

MDS-B PCB version 2.4 and above:

8HP 0 0 0 0 0

10HP 0 0 0 0 1

12HP 0 0 0 1 0

15HP 0 0 0 1 1

14HP 1 0 1 0 1

16HP 1 0 1 1 0

18HP 0 0 1 0 0

20HP 0 0 1 0 1

22HP 0 0 1 1 0

24HP 0 0 1 1 1

26HP 0 1 0 0 0

28HP 0 1 0 0 1

30HP 0 1 0 1 0

32HP 0 1 0 1 1

34HP 0 1 1 0 0

36HP 0 1 1 0 1

38HP 0 1 1 1 0

40HP 0 1 1 1 1

42HP 1 0 0 0 0

44HP 1 0 0 0 1

46HP 1 0 0 1 0

48HP 1 0 0 1 1

50HP 1 0 1 0 0

79

Appendix


D. Cable Length of Wired Handset

4 SQ-LCD

8 MC301

9 MC303

UL2547

AWG26

UL2547

AWG26

UL2547

AWG26

UL2547

AWG26

UL2547

AWG26

UL2547

AWG26

UL2547

AWG26

UL2547

AWG24

RS485 AWG20 20m Not Provided 1000m

Appendix

Cable Length (m)

Standard Optional Maximum

2.2m, 7m 10m, 15m 20m

10m 15m 20m

10m 15m 20m

Not Provided Not Provided 100m

80

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