McQuay MCM, MWMV, M5CM, M5CMY, MCK Service Manual

SERVICE GUIDE BOOK

MCQUAY Service Guide Book Table of Contents

1

Table of Contents

1.0 MODEL NAME

1.1 Product Name Description ............................... 2

2.0 CONVERSION TABLE

2.1 Conversion Table ............................... 3

3.0 PRODUCT MAINBOARD VS HANDSET MATRIX

3.1 Product Mainboard vs. Handset Matrix ............................... 4

4.0 HANDSET OPERATING GUIDE

4.1 G6 ............................... 6

4.2 G7 ............................... 7

4.3 G11 ............................... 8

4.4 G17 ............................... 9

4.5 GS01 ............................... 10

4.6 APJ1 ............................... 12

4.7 SLM3 ............................... 14

4.8 SLM8 ............................... 15

4.9 Sequential LCD ............................... 17

4.10 Netware 3/3C ............................... 18

4.11 Rooftop Panel ............................... 19

4.12 Chiller Panel ............................... 20

4.13 MC301 ............................... 21

4.14 MC303 ............................... 24

5.0 CONTROLLER SETTING

5.1 Auto Random Restart ............................... 26

5.2 Hot Keep Selection ............................... 26

5.3 Sequential Board (SQ2.0) ............................... 28

5.4 Chilled Water Fan Coil Unit – W1V3 ............................... 30

5.5 Chilled Water Fan Coil Unit – W2.0

5.6 Hardware Setting – SLM8

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

31 32

6.0 CONVERSION CONFIGURATION

6.1 Auxiliary Heater Conversion 33

6.2 Multi Split Conversion ............................... 36

6.3 U1.5 Æ L208A Conversion ............................... 37

6.4 WMF U1.4 to L2EF Conversion ............................... 38

6.5 SQ Board for Wiring up to 1000m Conversion ............................... 39

6.6 Room Sensor On Netware 3 ............................... 41

7.0 SERVICE DIAGNOSIS

7.1 LED Lights Diagnosis Table ............................... 42

7.2 Error Codes Diagnosis By Handset ............................... 62

7.3 MDS Diagnosis ............................... 72

7.4 General Check ............................... 75

7.5 General Troubleshooting Guide ............................... 76

APPENDIX

A. Resistance – Temperature Characteristic ............................... 77

B. MDS Compatibility ............................... 80

C. MDS Outdoor Capacity Dip Switch Setting ............................... 81

D. Cable Length Of Wired Handset ............................... 82

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

MCQUAY Service Guide Book Model Name

2

1.0 MODEL NAME

1.1 Product Name Description

No. Description Generic Model Name MCQUAY Brand

1 Wall Mounted Fan Coil Unit WM / 5WM MWM / M5WM

2 Wall Mounted AC Inverter Fan Coil Unit WMV MWMV

3 Wall Mounted DC Inverter Fan Coil Unit 5WMX M5WMX

4 Wall Mounted DC Inverter-Y Fan Coil Unit 5WMY M5WMY

5 Ceiling Exposed Fan Coil Unit CE / 5CE MCM / M5CM

6 Ceiling Exposed Inverter-Y Fan Coil Unit 5CEY M5CMY

7 Ceiling Cassette Fan Coil Unit CK / 5CK MCK / M5CK

8 Ceiling Cassette Inverter-Y Fan Coil Unit 5CKY M5CKY

9 Ceiling Concealed Fan Coil Unit CC / 5CC MCC / M5CC

10 Ceiling Concealed Inverter-Y Fan Coil Unit 5CCY M5CCY

11 Ducted Split Blower Unit SB MDB

12 Chilled Water Fan Coil Unit CW MCW

13 Water Source Heatpump Split Unit WSS / 5WSS MWSS / M5WSS

14 Horizontal Water Source Heatpump Unit WH MWH

15 Air Cooled Mini Chiller AC / 4AC / 5AC MAC / M4MAC /

M5MAC

16 Single Split Condensing Unit SL / 4SL / 5SL MLC / M4LC / M5LC

17 Single Split AC Inverter Condensing Unit SLV MLCV

18 Single Split DC Inverter Condensing Unit 5SLX M5LCX

19 Single Split DC Inverter Condensing Unit 5SLY M5LCY

20 Modular Split Condensing Unit MSS / 4MSS MMC / M4MC

21 Multi Split Series MSD / 4MSD MMSD / M4MSD

MST / 4MST MMST / M4MST

MSH MMSH

22 Multi Split AC Inverter Condensing Unit MSV MMSV

23 Multi Split DC Inverter Condensing Unit 5MSX M5MSX

24 Multi Split DC Inverter Condensing Unit 5MSY M5MSY

25 Multi Digital Scroll Units MDS/ 5MDS MDS/ 5MDS

26 Horizontal Condensing Unit HDC / 5HDC AHDC / A5HDC

27 Vertical Condensing Unit VCU MVCU

28 Air Cooled Roof Top Packaged Air

Conditioner

RT / 4RT / 5RT MRT / M4RT / M5RT

29 Air Cooled Inverter Mini Chiller 5ACV M5ACV

MCQUAY Service Guide Book Conversion Table

3

2.0 CONVERSION TABLE

2.1 Conversion Table

Capacity

Btu/hr MBH kCal/Hr kW

1 0.001 0.252 0.293 x 10

-

3

1000 1 252 0.293

3.968 0.004 1 1.162 x 10

-

3

3412 3.412 860.04 1

Pressure

PSI kg/cm

2

W.G. Pascal

(in.) (ft.) (Pa)

1 0.07 27.7 2.309 0.69 x 104

14.22 1 394.08 32.84 9.81 x 104

3.61 x 10

-

2

2.538 x 10

-

3

1 0.083 248.84

1.45 x 10

-

4

0.1 x 10

-

4

0.004 3.349 x 10

-

4

1

Flow Rate

L/s m

3

/hr m3/s U.S. GPM CFM

1 3.6 0.001 15.85 2.119

0.278 1 0.278 x 10

-

3

4.403 0.588

1000 3600 1 15850 2119

0.063 0.227 0.063 x 10

-

3

1 0.1337

0.472 1.7 0.472 x 10

-

3

7.481 1

Temperature Velocity

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. ft3

1 0.001 0.264 0.0353

1000 1 264 35.3

3.785 3.785 x 10

-

3

1 0.134

28.315 0.028 7.48 1

Area

in

2

ft2 m

2

cm2

1 6.94 x 10

-

3

6.452 x 10

-

4

6.452

144 1 0.093 929.03

1550.06 10.764 1 1 x 104

0.155 1.076 x 10

-

3

1 x 10

-

4

1

°F = (1.8 x °C) + 32

8.1

32−°=°F

C

MCQUAY Service Guide Book Product Mainboard vs. Handset Matrix

4

3.0 PRODUCT MAINBOARD VS. HANDSET MATRIX

3.1 Product Mainboard vs. Handset Matrix

Type No.

Main Board

Model

L2.0

L2

GSN

L2

08A

R_1_

01A

W_2_

03A

C_2_

01A

2P2065

69-4

U1

SB125

SQ

2.0

VA2.0 VA3.0

Handset

Standard Optional

DX

1 WM - F Series

9

G17 SLM3+AC5300/Netware 3/SLM8

2 WM - G Series

9

G17SLM3+AC5300/Netware 3/SLM8

3 WMS - G Series

9

G17SLM3+AC5300/Netware 3/SLM8

4 WM – J Series

9

GS01 -

5 CK - A/B/C/E Series

9

G17/GS01 SLM3+AC5300/Netware 3/SLM8

6 CE - D Series

9

G17SLM3+AC5300/Netware 3/SLM8

7 CE - E Series

9

G17SLM3+AC5300/Netware 3/SLM8

8 CC - C Series

9

SLM3 Netware 3 / SLM8

9 CC - D Series

9

Netware 3 SLM3

10 SB - B/C Series

SB 75 – 100B/BR

9

SLM3 Netware 3 / SLM8

SB 125 – 150B/BR

9

SLM3 -

SB 125CR

9

SLM3 SB 150B2/BR2 – 600B4/BR4

9

SQ-LCD -

11 SB – D/ER Series

SB 75 – 100D/ER

9

SLM3 Netware 3 / SLM8

SB 125 – 150D/ER

9

SLM3 SB 125D2 – 500D4

9

SQ-LCD SB 125ER2 – 600ER4

9

SQ-LCD -

12 RT Series

RT 55 – 120A/AR

9

SLM3 -

RT 150 – 420A/AR

9

SQ-LCD 5RT 90 – 250BR

9

RT Panel -

13 WMX – F/G Series

9

G17 SLM3 + AC5300

CKX – A/C Series

9

G17 SLM3 + AC5300

CEX – E Series

9

G17 SLM3 + AC5300

CCX – C Series

9

SLM3 Netware 3 / SLM8

14 WMY – J Series

9

G17/GS01 -

15 WMY – K Series

9

APJ1 -

16 CKY – E Series

CEY – E Series CCY – C Series

9 9 9

GS01 GS01

Netware 3C

4

MCQUAY Service Guide Book Product Mainboard vs. Handset Matrix

5

Type

No.

Main Board (IC)

Model

W2 MC1.0 LWS2 APM01CB APM02D

Handset

Standard Optional

CW FCU

13 WM – GW Series

9

G17

SLM3+AC5300/Netware 3/SLM8

14 CK – AW/MWH/CW Series

9

G17

SLM3+AC5300/Netware 3/SLM8

15 CE – DW Series

9

G17

SLM3+AC5300/Netware 3/SLM8

16 CE – EW Series

9

G17

SLM3+AC5300/Netware 3/SLM8

17 CC – CW Series

9

SLM3

Netware 3 / SLM8

18 SB – BW Series

9

N/A

-

Mini Chiller

19 AC – C Series

AC 20 – 60C/CR

9

C. Panel

-

AC 80 – 150C/CR

9

C. Panel

-

5AC 20 – 25C/CR

9

C. Panel

-

5AC 30 – 55C/CR

9

C. Panel

-

WSHP

20 5WMWS – GR

9

G17

SLM3+AC5300/Netware 3/SLM8

21 5CKWS – AR/CR

9

G17

SLM3+AC5300/Netware 3/SLM8

22 5CCWS – CR

9

SLM3

Netware 3 / SLM8

23 WH – B Series

WH 11 – 20B/BR

9

SLM15A

-

WH 25 – 70B/BR

9

APW04A

-

5

MCQUAY Service Guide Book Handset Operating Guide

6

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 ▲ or ▼ button simultaneously will 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.

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.

MCQUAY Service Guide Book Handset Operating Guide

7

4.2 G7

Operation Guide

1. Transmission Source

2. Signal Transmission Indication

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

3. On/Off Button

4. Temperature Setting

• 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.

MCQUAY Service Guide Book Handset Operating Guide

8

4.3 G11

Operation Guide

1. “ON/OFF” Button

2. Temperature Setting

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

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

3. Operation Mode

• 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 ( ) –––: High ( ) –––: Auto

5. ON Timer Setting

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.

8. Sleep Mode Setting

• This function is available under COOL, HEAT and AUTO mode.

• When the unit is operating under cooling mode, the set temperature is increased by 0.5°C after 30 minutes, 1°C after an hour, and 2°C after 2 hours.

• When the unit is operating under heating mode, the set temperature is decreased by 1°C after 30 minutes, 2°C after an hour and 3°C after 2 hours.

9. Clock Time Setting

• Press + button to increase the clock time.

• Press – button to decrease the clock

time.

10. Turbo Mode

• Press the TURBO (

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

11. Ionizer

• Press the Ionizer (

) button to activate the negative Ion function, which will refresh the indoor air effectively.

12. Personalize Setting

• Press button and hold for 3s to initiate personalized setting

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

• 2 groups of settings are allowed to store in the handset. Press once to activate the P1 setting, press again to cycle between P1 and P2.

• Press any key to deactivate the personalize setting.

MCQUAY Service Guide Book Handset Operating Guide

9

4.4 G17

Operation Guide

1. Transmission Source

2. Signal Transmission Indication

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

3. Temperature Setting

• 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)

• Press the 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.

7. 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 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.

9. Fan Speed Selection

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

Low Med High Auto

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

10. “ON/OFF” Button

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 again to deactivate the function.

15. Clock Time Setting

• Press

and hold to set the clock time.

MCQUAY Service Guide Book Handset Operating Guide

10

4.5 GS01

Operation Guide

1. Transmission Source

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 AUTO

mode is unavailable for

chilled water system.

6. Automatic air swing

• Press the SWING

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

Swing mode selection (for CK-E model)

• Press SWING

button for 4 seconds to

enter field setting mode.

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

.

• Press temperature 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.

• Press again to deactivate the function.

• Available under HEAT, COOL and DRY

modes only.

1

2

3

4

5

6

7

8

9

10

11

12

13

MCQUAY Service Guide Book Handset Operating Guide

11

• Any change of fan speed will deactivate this function.

• The Turbo function

is unavailable for

chilled water system and remote control with SWING MODE function.

8. OFF timer setting

9. Quiet function (model dependant)

• Press for quiet operation.

• Fan speed turn to minimum speed.

• Press again to deactivate the function.

• Any change of fan speed will deactivate

this function.

• The Silent function is unavailable for chiller water system.

10. Clock time setting

• Press and hold

button to set the clock

time.

11. ON timer setting

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

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

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

MCQUAY Service Guide Book Handset Operating Guide

12

4.6 APJ1

Operation Guide

1. Transmission Source

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

button to start ECONO

operation. The symbol

is displayed on

the LCD.

• Press

button to cancel ECONO

operation. The symbol

button

disappears from the LCD.

4. POWERFUL 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.

• To cancel POWERFUL operation, press button again. disappears

from the LCD.

5. Temperature Settings.

6. ON/ OFF button

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.

1

2

4

5

6

7

8

9

10

11

12

13

3

MCQUAY Service Guide Book Handset Operating Guide

13

• The flap (horizontal blade) will begin to swing.

• To set the flap at desired position, press

button when the flap has reached

the desired position. The flap will stop moving. The symbol

disappeared from

the LCD.

10. COMFORT AIRFLOW Operation

• When COMFORT is enable, the flow of air will be upward direction while in COOL operation and in the downward direction while in HEAT operation, which will provide a comfortable wind that will not come in direct contact with people.

• To start COMFORT AIRFLOW operation, press COMFORT

button. The flap will change, preventing air from blowing directly on the occupants of the room. The

symbol

is displayed on the LCD.

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

• To cancel COMFORT AIRFLOW operation, press COMFORT

button again. The flap will return to the memorized position before the COMFORT AIRFLOW operation.

• The symbol

will disappear from the

LCD.

11. ON TIMER Operation

• To use ON TIMER operation, press button.

•

is displayed on the LCD. Each

pressing of

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

• To cancel ON TIMER operation, press

button. will disappear from the

LCD.

12. OFF TIMER Operation

• To use OFF TIMER operation, press button.

•

is displayed on the LCD. Each

pressing of

advances the time setting by 1 hour. The timer can be set between 1 to 9 hours.

• To cancel OFF TIMER operation, press

button. will disappear from the

LCD.

13. CANCEL Button

MCQUAY Service Guide Book Handset Operating Guide

14

4.7 SLM3

Operation Guide

1. “

ON/OFF” Switch

2. Temperature Setting

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

3. Operation Modes

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

-Cooling Only: COOL, DRY, FAN

-Heat Pump: AUTO, COOL, DRY, HEAT, FAN

• AUTO mode is represented by both COOL and HEAT LED light on.

4. Fan Speed Selection

• Press the button until the desired fan speed is achieved.

5. Timer

• Press the set button to select the switch timer of the air conditioner unit (the setting range is between 1 to 15 hours).

6. “SLEEP” Mode

• This function can only be activated under “cool” or heating mode operation. When it is activated under “cool” mode operation, the set temperature will increase 0.5°C

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

7. Air Swing

• Press button to activate the automatic air swing function.

8. Sensor

• Infra red sensor to receive signals from wireless controller.

9. LED Display

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

10. Transmission Source

MCQUAY Service Guide Book Handset Operating Guide

15

4.8 SLM8

No. KEY No. KEY

1 MODE 8 OFF TIMER 2 TURBO 9 ON TIMER 3 SWING 10 DELAY TIMER 4 QUEIT 11 FAN 5 SET TEMP UP 12 ON/OFF 6 SET TEMP

DOWN

13 REAL TIME

CLOCK (RTC)

7 SLEEP

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

• Press the SWING

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

Swing mode selection (for selected model)

• Press SWING

button for 4 seconds to

enter field setting mode.

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

.

• Press temperature 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

.

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.

5. Temperature Setting

• 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.

MCQUAY Service Guide Book Handset Operating Guide

16

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.

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4.8 Sequential Controller

Operating Guide

1. “ON/OFF” Switch

• 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 the MODE 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

• Press the SAVE 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.

5. Temperature Setting

• To set the desired room temperature, press or to increase or decrease the set temperature in the range of 16°C to 30°C.

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

6. Time Setting

Real time clock

• Press the CLOCK 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 the ON TIMER 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.

• Press the OFF TIMER 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.

4.9 Netware 3 / Netware 3C

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 I : Temperature set E : Heater (up to 2 heaters)

MCQUAY Service Guide Book Handset Operating Guide

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Differences between Netware 3 & Netware 3C:

Netware 3 Netware 3C

Compatibility

Non-inverter / X-inverter

Series

Y-inverter Series

Casing Color Dark Silver White

Retrieve Last State Error No Yes

Pump Down No Yes

Applicable model All except A(5)WM-J/JR

For MCK-E, only applicable

with nomenclature ACOBB

All except M5WMY-J/JR

NIM/G-WAY Yes

For MCK-E, only applicable

with nomenclature ACOBB

No

Operating Guide

1. “ON/OFF” Switch

• 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 the MODE key to select the type of

operating mode. Consecutive press of the key switches the

• operation over “COOL”, “HEAT”, “AUTO”, “DRY” and “FAN”

3. Fan Speed Selection

• Press the FAN key until the desired fan

speed is achieved.

4. Sleep Mode Setting

• Press the SLEEP 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.

Jumper

20 - 30

Application

SET Set temp range : 20°C ~ 30°C OFF Set temp range : 16°C ~ 30°C

1. Time display

2. Key lock display

3. Error indication

4. Fan speed display

5. Operation mode display

6. Sleep mode display

7. Air swing display

8. Temperature set display

MCQUAY Service Guide Book Handset Operating Guide

19

• 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.

5. Temperature Setting

• To set the desired room temperature, press or to increase or decrease the set temperature in the range of 16°C to 30°C.

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

6. Air Swing

• Press the SWING 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)

• 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.

4.10 Rooftop Panel

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20

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 : OFF Mode : Heating Set Temp : 24°C

▼

2. “ON/OFF” Switch

• 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.

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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 : OFF Mode : Cooling Set Temp : 12°C

[00]

2. “ON/OFF” Switch

• 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.

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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

• Use “▲” or “▼” keyboard to increase or decrease by 1 °C/°F, temperature range is 16-30 °C (61-86°F).

• Press “FAN” for 5s to alter between °C and °F.

3. 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.

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 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.

8. Keyboard Lock

• Press “SLEEP” for 5s, the keyboard will be changed between locked and unlocked.

• 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.

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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.

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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

• 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

6. Temperature Setting

• Use “▲” or “▼” keyboard to increase or decrease by 1 °C/°F, temperature range is 16-30 °C (61-86°F).

• Press “FAN” for 5s to alter between °C and °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.

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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.

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5.0 CONTROLLER SETTING

5.1 Auto Random Restart 5.2 Hot Keep Selection

• 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

Three selections available:

a. Fan stop if indoor coil temperature < 30°C

(OFF).

b. Fan runs at low speed if indoor coil

temperature < 30°C and stop if indoor coil temperature < 18°C (ON).

c. Cycle of low fan running for 30s and fan

off for 120s and repeat (INTERVAL).

WM – F/FR (U1.5 & L2EF)

3 selections available at the slide switch on the On/Off Switch Board; Preset at OFF.

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

i. Remove the connector to have (b) Fan

ON and

ii. Cut off the big resistor (12kOhm)

to have

(c) Fan INTERVAL

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

Ducted Model – standard setting is (c) Fan INTERVAL

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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.

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.

.

L208A / LWS2.0 models

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

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).

For LWS2.0 jumper setting

MODEL HT_KP

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

Open DX INTVL

For L208A jumper setting

MODEL HT_KP

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

Open ALWY ON -

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5.3 Sequential Board (SQ2.0)

Dip switch setting of sequential controller are as the following:

Main Board SQ2.0

1. Models Selection

Model

Dip

switch 1

Dip

switch 2

a. No heater Off Off b. 1 heater On Off c. 2 heater On/Off On

Where n = no. of compressor(s) Postfix no. = no. of heater(s)

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:

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

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

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

Model Diff. Temperature

1 compressor Not. Applicable 2 compressors 1.5°C 3 compressors 1.0°C 4 compressors 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

Dip switch 6

a. Fan off Off b. Fan on 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.

J_LST Setting a. Last memory Backup J_LST Plugged b. W/o last memory Backup J_LST Removed *For SQ1.0, the jumper is JH1.

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6. Defrost Option

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

Dip switch 8 a. Compressor off Off b. Compressor on On (C2.4 spec)

7. Summary of Models available

SQCn Cooling Only model SQHnh Heatpump model

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

Factory preset (default setting)

Model 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:

Start Indoor

Outdoor fan 1 Compressor 1*

Outdoor fan 2 Compressor 2*

Outdoor fan 3 Compressor 3*

Outdoor fan 4 Compressor 4*

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

Start Indoor All 4-way valves

Outdoor fan 1 Compressor 1*

Outdoor fan 2 Compressor 2*

Outdoor fan 3 Compressor 3*

Outdoor fan 4 Compressor 4*

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

2s

15s

2s

15s

2s

MCQUAY Service Guide Book Controller Configuration

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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:

Mode Application

VALVE jumper

HEAT

jumper

Heatpump

Valve √ √

Valve less X √

Cooling Only

Valve √ X

Valve less 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.

Switch Board W1V3

Model: MCK 20-50AW, MCK 15-25BW, MCK 1020CW, 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.

Main Board W1V3

VALVE Jumper.

HEAT Jumper

VALVE Jumper

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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:

Jumper Configurati

on

Operating Modes

M1 2 Pipes

without Aux. Heater

Heat>Cool>Dry>Fan

M2 2 Pipes with

Aux. Heater

Heat>Cool>Dry>Fan

M3 4 Pipes +

Boiler

Heat>Cool>Dry>Auto >Fan

M4 4 Pipes +

Boiler

Heat>Cool>Dry>Fan

W2 Main Board

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

Mode Application

VALVE jumper

HEAT

jumper

Heatpump

Valve √ √

Valve less X √

Cooling Only

Valve √ X

Valve less 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.

MWM 07/10/15G2W

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.

M1 M2 M3 M4

Heat Jumper

Valve Jum

per

Heat Jumper

Valve Jum

per

Heat Jumper

Valve Jum

per

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5.6 Hardware Setting – SLM8

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

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.

20-30C

TURBO_

QUIET

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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:

1. Heater relay (240V/20A)

2. Transistor, 2SC945

3. Diode, IN4003

Board U1.5 Heatpump with Auxiliary Heater

Heater Relay (RLY 8)

Transistor (Q3)

Diode (D17)

MCQUAY Service Guide Book Controller Configuration

34

SB125 Heatpump with Auxiliary Heater

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

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

2. Solder all the relay pins.

Re

SB125 Heatpump with Auxiliary Heater

RY_HTR

MCQUAY Service Guide Book Controller Configuration

35

W2 Heatpump with Auxiliary heater

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

1. Shunt jumper

2. JM Relay 240VAC/ 20A

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

Step 2:-

1. Place the JM relay at RY_HTR location

2. Solder all the relay pins

W2 Heatpump with Auxiliary Heater

M2

RY_HTR

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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.

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.

MCQUAY Service Guide Book Controller Configuration

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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:-

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 MCKA/AR panel.

4. Inter-connector cable from main board to MCKC/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 MCMD/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.

PART Number: PI-C-R0094

Item 1 & 5

Item 6

Item 3

Item 4

Item 7

MCQUAY Service Guide Book Controller Configuration

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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

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.

Display Panel

ON/ OFF switch board

Display Panel

ON/ OFF switch

b

oar

d

U1.4 PCB

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

MCQUAY Service Guide Book Controller Configuration

39

6.5 SQ Board for Wiring up to 1000m Conversion

Comparison of Sequential Main Board SQMB01 Before & After conversion:

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

Jumper J1 and J2 removed

U8

J1

J2

IC:MAX1483

J1 removed

J2 removed

Enlarge view of SQMB01 after conversion

MCQUAY Service Guide Book Controller Configuration

40

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.

BACK View of Sequential LCD

J2

J1

U4

R8, R9, R10

MCQUAY Service Guide Book Controller Configuration

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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.

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.

L208A PCB

TH1

Room

Sensor

Remove this

MCQUAY Service Guide Book Diagnosis

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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 G7 MWM 07/10/15/20/25F L2EF G7

POWER

(Green)

SLEEP

(Red)

TIMER

(Orange)

DRY

(Orange)

Operation / Faulty

Indication

Action

Timer On -

Sleep mode On -

Dry mode -

Defrost mode -

Room air sensor contact loose / short

Check room sensor connection / change room sensor

Indoor coil sensor contact loose / short

Check indoor coil sensor connection / change indoor coil sensor

Gas leak

Check for leakage & repair / Top up refrigerant

/ ON ON or OFF BLINKING

/

Continuously

Once every 2s

3 times every 2s

Twice every 2s

MCQUAY Service Guide Book Diagnosis

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Wall Mounted F Series Heat Pump

Model Board Handset MWM 10/15/20/25FR, 301R U1.5 G7 / SLM3 / Netware 3 / SLM8 MWM 07/10/15/20/25FR, 311/301R L2EF G7

COLD

(Green)

DRY

(Orange)

FAN

(Green)

HEAT

(Red)

SLEEP

(Red)

Error Code

(SLM3 /

Netware 3)

Operation /

Faulty

Indication

Action

- Cooling mode -

- Dry mode -

- Fan mode -

- Heating mode -

-

Auto mode in heating operation

-

Auto mode in cooling operation

-

Heat LED

blinking

(SLM3 only)

Defrost mode -

E1

Room air sensor contact loose / short

Check room sensor connection / change room sensor

E2

Indoor coil sensor contact loose / short

Check indoor coil sensor connection / change indoor coil sensor

E3

Outdoor coil sensor contact loose / short

Check outdoor coil sensor connection / change outdoor coil sensor

E4

Compressor overload protection

If running ampere highly increase, change the compressor

E5 Gas leak

Check for leakage & repair / Top up

refrigerant 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.

/ ON ON or OFF BLINKING

MCQUAY Service Guide Book Diagnosis

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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)

Operation / Faulty

Indication

Action

- Cooling mode -

- Heating mode -

-

Auto mode in heating operation

-

Auto mode in cooling operation

-

- Timer On -

- Sleep mode On -

- Ionizer On -

- Fan mode On -

- Dry mode On -

E1

Room air sensor contact loose / short

Check room sensor connection / change room sensor

E2

Indoor coil sensor contact open

Check indoor coil sensor connection / change indoor coil sensor

E3

Outdoor coil sensor contact open

Check outdoor coil sensor connection / change outdoor coil sensor

E4

Compressor overload protection / Indoor / Outdoor coil sensor short

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

- Defrost mode -

E5 Gas leak

Check for leakage & repair / Top up refrigerant

E8

Hardware error (tact switch pin short)

Check for the tact switch pin condition

ON ON or OFF BLINKING

Green

Red

Green

1 time

3 times

1 time

Red

3 times

6 times

2 times

MCQUAY Service Guide Book Diagnosis

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Wall Mounted J Series

Model Board Handset MWM 09/15J/JR L2GSN G17

SLEEP

(Red)

POWER

(Green/Red)

TIMER

(Orange)

Error Code

Operation / Faulty

Indication

Action

- Cooling mode -

- Heating mode -

-

Auto mode in heating operation

-

Auto mode in cooling operation

-

- Timer On -

- Sleep mode On -

- Fan mode On -

- Dry mode On -

E1

Room air sensor contact loose / short

Check room sensor connection / change room sensor

E2

Indoor coil sensor contact open

Check indoor coil sensor connection / change indoor coil sensor

E3

Outdoor coil sensor contact open

Check outdoor coil sensor connection / change outdoor coil sensor

E4

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

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

- Defrost operation -

E5 Gas leak

Check for leakage & repair / Top up refrigerant

E8

Hardware error (tact switch pin short)

Check for the tact switch pin condition

E9

No Feedback from indoor fan

Check indoor fan motor / fan motor wiring

EE EEPROM defrost -

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

ON ON/ OFF Blinking

Green

Red

Green

1 time

3 times

1 time

Red

3 times

2 times

6 times

4 times

5 times

MCQUAY Service Guide Book Diagnosis

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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 U1.5 G7 / SLM3 / Netware 3 / SLM8 MCK 10/15/20C/CR U1.5 G7 / SLM3 / Netware 3 / SLM8

POWER

(Green)

TIMER

(Orange)

SLEEP

(Red)

HEAT

(Red)

Error Code

(SLM3 /

Netware 3)

Operation /

Faulty Indication

Action

- Cooling mode -

- Timer On -

- Sleep mode On -

- Heating mode -

Heat LED

blinking

(SLM3 only)

Frost prevention mode

-

E4

Compressor overload protection

If running ampere highly increase, change the compressor

E6 Pump fault

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

E5 Gas leak

Check for leakage & repair / Top up refrigerant

E1/E2/E3

Room / indoor / outdoor coil sensor contact loose / short

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

ON ON or OFF BLINKING

Once every 3s

3 times

every 3s

Twice every 3s

Continuously

4 times every 3s

MCQUAY Service Guide Book Diagnosis

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Ceiling Cassette A / B / C/ E Series Model

Model Board Handset MCK 20/25/30/40/50A/AR L208A G17 / SLM3 / Netware 3 / SLM8 MCK 15/20/25B/BR L208A G17 / SLM3 / Netware 3 / SLM8 MCK 10/15/20C/CR L208A GS01 / G17 / SLM3 / Netware 3 / SLM8 MCK 20/25/28/40/50E/ER L208A GS01 / G17

POWER

(Green)

TIMER

(Orange)

SLEEP

(Red)

HEAT

(Red)

Error Code

(SLM3 /

Netware 3)

Operation / Faulty

Indication

Action

- Cooling mode -

- Timer On -

- Sleep mode On -

- Heating mode -

-

Auto mode in cooling operation

-

Auto mode in heating operation

-

E1

Room air sensor contact loose / short

Check room sensor connection / change room sensor

E2

Indoor coil sensor contact open

Check indoor coil sensor connection / change indoor coil sensor

E3

Outdoor coil sensor contact open

Check outdoor coil sensor connection / change outdoor coil sensor

E4

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

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

E6 Pump fault

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

E5 Gas leak

Check for leakage & repair / Top up refrigerant

E7

Outdoor coil sensor exist (MS model)

Remove outdoor coil sensor

E8

Hardware error (tact switch pin short)

Replace the tact switch control board

ON ON or OFF BLINKING

1 time

2 times

3 times

1 time

2 times

3 times

5 times

6 times

MCQUAY Service Guide Book Diagnosis

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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)

Operation / Faulty

Indication

Action

- Cooling mode -

- Dry mode -

- Fan mode -

- Heating mode -

-

Auto mode in cooling operation

-

Auto mode in heating operation

-

Heat LED

blinking

(SLM3 only)

Defrost mode -

E1

Room air sensor contact loose / short

Check room sensor connection / change room sensor

E2

Indoor coil sensor contact open / short

Check indoor coil sensor connection / change indoor coil sensor

E3

Outdoor coil sensor contact open / short

Check outdoor coil sensor connection / change outdoor coil sensor

E4

Compressor overload protection

If running ampere highly increase, change the compressor

E5 Gas leak

Check for leakage & repair / Top up refrigerant

ON ON or OFF BLINKING

MCQUAY Service Guide Book Diagnosis

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Ceiling Exposed D / E Series Model

Model Board Handset MCM 20/25/30/40/50D/DR L208A G17 / SLM3 / Netware 3 / SLM8 MCM 15/20/25/28E/ER L208A G17 / SLM3 / Netware 3 / SLM8

COOL

(Green)

DRY

(Orange)

FAN

(Green)

HEAT

(Red)

Error Code

(SLM3 /

Netware 3)

Operation / Faulty

Indication

Action

- Cooling mode -

- Dry mode -

- Fan mode -

- Heating mode -

-

Auto mode in cooling operation

-

Auto mode in heating operation

-

E1

Room air sensor contact loose / short

Check room sensor connection / change room sensor

E2

Indoor coil sensor contact open

Check indoor coil sensor connection / change indoor coil sensor

E3

Outdoor coil sensor contact open

Check outdoor coil sensor connection / change outdoor coil sensor

E4

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

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

E5 Gas leak

Check for leakage & repair / Top up refrigerant

E7

Outdoor coil sensor exist (MS model)

Remove outdoor coil sensor

E8

Hardware error (tact switch pin short)

Replace the tact switch control board

ON ON or OFF BLINKING

Blink Heat, Cool, follow by Fan, Dry

MCQUAY Service Guide Book Diagnosis

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Chilled Water Fan Coil Unit

Model Board Handset MWM 05 – 25FW, 301W W1V3 G7 / SLM3 / Netware 3 / SLM8 MCK 20 – 50AW/MWH W1V3 G7 / SLM3 / Netware 3 / SLM8 MCK 15 – 25BW W1V3 G7 / SLM3 / Netware 3 / SLM8 MCK 10 – 20CW W1V3 G7 / SLM3 / Netware 3 / SLM8 MCM 20 – 50DW/CBW W1V3 G7 / SLM3 / Netware 3 / SLM8 MCC 10 – 60CW W1V3 SLM3 / Netware 3 / SLM8 MDB 75 – 150BW N/A No Controller

Self Diagnostic Table – W1V3

Fault Indication

POWER LED

/ COOL LED

Other LEDs

Error Code

Action

Room sensor missing Blinks 4 times FAN blinks E1 Check room sensor

connection / change room sensor

Indoor coil sensor missing Blinks 4 times SLEEP blinks E2 Check indoor coil sensor

connection / change indoor coil sensor

Pump fault Blinks 2 times COOL & FAN

blink

E6 Clear the clogging at drain

pipe. If pump is not working,

change the pump Pipe water temperature poor

Blinks 3 times COOL & DRY

blink

E4

-

Pipe water temperature fault

Blinks 1 time COOL blinks E5

-

Model Board Handset MWM 07 – 25G2W W2 G17 / SLM3 / Netware 3 / SLM8 MWM 301W W2 G17 / SLM3 / Netware 3 / SLM8 MCK 20 – 50AW/MWH W2 G17 / SLM3 / Netware 3 / SLM8 MCK 15 – 25BW W2 G17 / SLM3 / Netware 3 / SLM8 MCK 10 – 20CW W2 G17 / SLM3 / Netware 3 / SLM8 MCM 07 – 15CBW W2 G17 / SLM3 / Netware 3 / SLM8 MCM 20 – 50DW W2 G17 / SLM3 / Netware 3 / SLM8 MCM 15 – 25EW W2 G17 / SLM3 / Netware 3 / SLM8 MCC 10 – 60CW W2 SLM3 / Netware 3 / SLM8 MDB 75 – 150BW N/A No Controller

Self Diagnostic Table – W2

Fault Indication COOL LED

Error Code

Action

Room sensor error (short/open) Blink 1 time E1 Check room sensor

connection / change room air

sensor Pipe water sensor error (short/open) Blink 2 times E2 Check pipe water sensor

connection / change pipe

water sensor Water pump error Blink 6 times E6 Clear the clogging at drain

pipe. If pump is not working,

change the pump Pipe water temperature fault Blink 5 times E5 Window open activated* Blink 3 times - Antifreeze mode activated* Blink 7 times - Load shedding activated* Blink 8 times - -

*Applicable for 4 pipes applications only.

MCQUAY Service Guide Book Diagnosis

51

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)

Operation / Faulty

Indication

Action

- Cooling mode -

- Heating mode -

-

Auto mode in heating operation

-

Auto mode in cooling operation

-

- Timer On -

- Sleep mode On -

- Ionizer On -

- Fan mode On -

- Dry mode On -

E1

Room air sensor contact loose / short

Check room sensor connection / change room sensor

E2

Indoor coil sensor contact open

Check indoor coil sensor connection / change indoor coil sensor

E3

Outdoor coil sensor contact open

Check outdoor coil sensor connection / change outdoor coil sensor

E4

Compressor overload protection / Indoor / Outdoor coil sensor short

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

Heat LED

blinking

(SLM3 only)

Defrost mode -

E5 Gas leak

Check for leakage & repair / Top up refrigerant

E8

Hardware error (tact switch pin short)

Check for the tact switch pin condition

ON ON or OFF BLINKING

Green

Red

Green

1 time

3 times

2 times

1 time

Red

3 times

6 times

MCQUAY Service Guide Book Diagnosis

52

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

Model Board Handset M5CKWS 20/25/30/40/50AR LWS2.0 G17 / SLM3 / Netware 3 / SLM8 M5CKWS 10/15/20CR LWS2.0 G17 / SLM3 / Netware 3 / SLM8

POWER

(Green)

TIMER

(Orange)

HEAT

(Red)

Error Code

(SLM3 /

Netware 3)

Operation / Faulty

Indication

Action

- Cooling mode -

- Timer On -

- Heating mode -

-

Auto mode in cooling operation

-

Auto mode in heating operation

-

E1

Room air sensor contact loose / short

Check room sensor connection / change room sensor

E2

Indoor coil sensor contact loose / open

Check indoor coil sensor connection / change indoor coil sensor

E3

Outdoor coil sensor contact loose / open

Check outdoor coil sensor connection / change outdoor coil sensor

E4

Compressor overload protection

If running ampere highly increase, change the compressor

E6 Pump fault

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

E5 Gas leak

Check for leakage & repair / Top up refrigerant

ON ON or OFF BLINKING

1 time

2 times

3 times

1 time

2 times

3 times

MCQUAY Service Guide Book Diagnosis

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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)

Operation / Faulty

Indication

Action

Timer On -

Sleep mode On -

Dry mode -

E1

Indoor temperature sensors contact loose / short

Check indoor coil sensor connection / change indoor coil sensor

E2

Outdoor temperature sensor contact loose / short

Check outdoor coil sensor connection / change outdoor coil sensor

E3

Communication error between indoor and outdoor

Check the connection wires between indoor and outdoor

E4

Compressor overload protection

If running ampere highly increase, change the compressor

E6

Gas leak / compressor overheat

Check for leakage & repair / Top up refrigerant

E7

Inverter error / PFC error

Check supply voltage and compressor phase

E8

Outdoor total current trip / DC peak

Check the input current and discharge pressure

E9

Indoor fan feedback error

Check indoor fan motor / fan motor wiring

ON ON or OFF BLINKING

/

MCQUAY Service Guide Book Diagnosis

54

Wall Mounted F Heatpump Inverter-X Model

Model Board Handset MWMX 10/15FR VA2.0 G17 / SLM3

COOL/DRY

/

(Green)

HEAT

(Red)

STANDBY/FAN

(Orange)

TIMER

(Orange)

Error Code

(SLM3)

Operation / Faulty

Indication

Action

-- Cooling mode -

-- Dry mode -

--

Stand-by / Fan mode

-

-- Heating mode -

-- Auto mode -

-- Defrost mode -

E1

Indoor temperature sensors contact loose / short

Check indoor coil sensor connection / change indoor coil sensor

E2

Outdoor temperature sensor contact loose / short

Check outdoor coil sensor connection / change outdoor coil sensor

E3

Communication error between indoor and outdoor

Check connection wires between indoor and outdoor

E4

Compressor overload protection

If running ampere highly increase, change the compressor

E6

Gas leak / compressor overheat

Check for leakage & repair / Top up refrigerant

E7

Inverter error / PFC error

Check supply voltage and compressor phase

E8

Outdoor total current trip / DC peak

Check the input current and discharge pressure

E9

Indoor fan feedback error

Check indoor fan motor / fan motor wiring

ON ON or OFF BLINKING

/

MCQUAY Service Guide Book Diagnosis

55

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)

Operation / Faulty

Indication

Action

- Cooling mode -

-

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

-

- Auto mode in operation -

- Timer On -

- Sleep mode On -

- Ionizer On -

- Fan mode On -

- Dry mode On -

- Defrost mode -

E1

Indoor temperature sensor loose / short

Check indoor coil sensor connection / change indoor coil sensor

-

Coil temperature sensor loose / short

Check coil sensor connection / change coil sensor

E2

Outdoor temperature sensor loose / short

Check outdoor coil sensor connection / change outdoor coil sensor

E3

Communication error between indoor and outdoor

Check the connection wires between indoor and outdoor

E4

Compressor overload protection

If running ampere highly increase, change the compressor

E6

Compressor overheat / gas leak

Check for leakage & repair / Top up refrigerant

E7 IPM / PFC error

Check supply voltage and compressor phase

E8

Outdoor total current trip / DC peak

Check the input current and discharge pressure

E9

Indoor fan feedback error

Check indoor fan motor / fan motor wiring

ON ON or OFF BLINKING

Red

Green

MCQUAY Service Guide Book Diagnosis

56

Ceiling Cassette A/C Series Inverter-X Model

Model Board Handset MCKX 20/25A/AR VA3.0 G17 / SLM3 MCKX 10/15/20C/CR VA3.0 G17 / SLM3

POWER

(Green)

TIMER

(Orange)

SLEEP

(Red)

HEAT

(Red)

Error Code

(SLM3)

Operation / Faulty

Indication

Action

- Cooling mode -

- Timer On -

- Sleep mode On -

- Heating mode -

- Defrost mode -

E1

Indoor temperature sensor loose / short

Check indoor coil sensor connection / change indoor coil sensor

E2

Outdoor temperature sensor loose / short

Check outdoor coil sensor connection / change outdoor coil sensor

E3 Communication error

Check connection wires between indoor and outdoor

E4

Compressor overload protection

If running ampere highly increase, change the compressor

E5 Pump fault

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

E6

Compressor overheat / gas leak

Check for leakage & repair / Top up refrigerant

E7

IPM / PFC / Partial switching

Check supply voltage and compressor phase

E8 Outdoor over current

Check the input current and discharge pressure

ON ON or OFF BLINKING

1 time

2 times

3 times

4 times

5 times

6 times

MCQUAY Service Guide Book Diagnosis

57

Ceiling Convertible E Series Inverter-X Model

Model Board Handset MCMX 15/20/25E/ER VA3.0 G17 / SLM3

COOL

(Green)

DRY

(Orange)

FAN

(Green)

HEAT

(Red)

Error

Code

(SLM3)

Operation / Faulty

Indication

Action

- Cooling mode -

- Dry mode -

- Fan mode -

- Heating mode -

- Defrost mode -

E1

Indoor temperature sensor loose / short

Check indoor coil sensor connection / change indoor coil sensor

E2

Outdoor temperature sensor loose / short

Check outdoor coil sensor connection / change outdoor coil sensor

E3

Communication error

Check connection wires between indoor and outdoor

E4

Compressor overload protection

If running ampere highly increase, change the compressor

E6

Compressor overheat / gas leak

Check for leakage & repair / Top up refrigerant

E7

IPM / PFC / Partial switching

Check supply voltage and compressor phase

E8 Outdoor over current

Check the input current and discharge pressure

ON ON or OFF BLINKING

1 time

2 times

3 times

4 times

6 times

MCQUAY Service Guide Book Diagnosis

58

Inverter - X Outdoor Unit

Model Board MLCX 10/15/20/25C/CR VB2.0 MMSV 25/35A VB2.0 AMSX 20/25/30A/AR VB2.0

Normal running / compressor running RED LED blinking

No. of Blinks Blinking Indication

1 Normal running, with no limitation

2 Voltage limit

3

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

4 Total current limit

5 Discharge temperature limit

6 Cooling unit: indoor coil temperature limit

7 Indoor fan control

8 Outdoor frequency adjustment

Compressor stopped Error Indication

No. of Blinks

Faulty Indication

No. of Blinks

Faulty Indication

Red Yellow Red Yellow

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

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

0 3

Outdoor discharge sensor error / compressor overheat

1 7 Outdoor suction sensor error

0 4 DC compressor feedback error 1 8 None

0 5 Communication error 1 9 DC compressor speed control error

0 6 Over current error 2 0 None

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

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

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

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

1 1 Defrost 3 1 Communication error with indoor A

1 2 IPM protection 3 2 Communication error with indoor B

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

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

MCQUAY Service Guide Book Diagnosis

59

Inverter-Y Model Indoor Series

Model Board Handset M5WMY 10/15/20/25 JR W_2_03A GS01 / G17 M5CKY 10/15/20CR C_2_01A GS01 / G17 / Netware 3C M5CKY 20/25/28/40/50 ER C_2_01A GS01 / G17 / Netware 3C A5CMY 62 CR C_2_01A GS01 / Netware 3C A5CMY 20/25/28/40/50 ER C_2_01A GS01 / G17 / Netware 3C M5CCY10/15/20/25/28/38/50/60 CR C_2_01A Netware 3C

SLEEP

(Red)

COOL/HEAT

(Green/Red)

TIMER

(Orange)

Operation / Faulty Indication

Cooling mode

Heating mode

Auto mode in heating operation

Auto mode in cooling operation

Time Off (when unit is on)

Time On (when unit is off)

Sleep mode on

Fan mode on

Dry Mode on

Defrost operation

Error indication

Green

Red

Green

ON Blinking

Red

MCQUAY Service Guide Book Diagnosis

60

Single Split Inverter – Y Outdoor Unit

Model Board M5LCY 10/15 DR 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 Display on 7-segment Unit in normal operating mode

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 Unit/ Range

00 Compressor actual rotation r/s 01 Compressor target rotation r/s 02 Dc bus voltage VDC 03 Total current (x10) A 04 Outdoor air temperature °C 05 Outdoor heat exchanger temperature °C 06 Compressor discharge temperature °C 07 Outdoor heat sink temperature °C 08 Indoor air temperature °C 09 Indoor heat exchanger temperature °C 10 EXV Opening Pulse

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

LED INDICATION

Description

HAP H3P

Green Red

●

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

MCQUAY Service Guide Book Diagnosis

61

Multi Split Inverter – Y Outdoor Unit

Model Board M5MSY 20/25/30 BR -

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

LED INDICATION

Description

Green Red

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

MCQUAY Service Guide Book Diagnosis

62

7.2 Error Codes Diagnosis By Handset

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

Error Code Faulty Indication

E1 Room air sensor contact loose / short E2 Indoor coil sensor contact open E3 Outdoor coil sensor contact open E4 Compressor overload protection/ Indoor coil sensor short/ Outdoor coil sensor short E5 Gas leak E6 Water Pump fault* E7 Outdoor coil sensor exist (Multi-split model) E8 Hardware error (tact switch pin short)

LO Room temperature below 8ºC(46 ºF)

HI Room temperature above 37ºC(99 ºF)

OP Working room sensor is open

SH Working room sensor is short

HEAT LED

blinking

Defrost mode (SLM3 only)

*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 Faulty Indication

E1

Room sensor short / open

E2

Pipe water sensor short / open

E4

Pipe water temperature poor

E5

Pipe water temperature fault

E6

Water pump fault

SLM 3 – Inverter X Models

Error Codes Faulty Indication

E1 Indoor temperature sensor loose / short E2 Outdoor temperature sensor loose / short E3 Communication error E4 Compressor overload protection E5 Pump fault E6 Compressor overheat / gas leak E7 IPM / PFC / Partial switching E8 Outdoor over current E9 Indoor fan feedback error

MCQUAY Service Guide Book Diagnosis

63

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 J1 Pressure sensor error A3 Drain pump fault 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 J6

Outdoor heat exchanger thermistor short/open

AH Electrical air cleaner fault J7

Sub cooling heat exchanger thermistor short/open

C4

Indoor heat exchanger (1) thermistor short/open

J8 Liquid pipe thermistor short/open

C5

Indoor heat exchanger (2) thermistor short/open

J9 Gas pipe thermistor short/open

C7 Louver limit switch error L1 Inverter outdoor PCB error C9 Indoor room thermistor short/open L3 Outdoor control box overheat E1 Outdoor PCB error L4 Heat sink overheat E3 High pressure protection L5 IPM error/IGBT error E4 Low pressure protection L8 Electrical thermal switch

E5

Compressor motor lock/compressor overloaded

L9 Stall prevention

E6 Compressor start-up error LC

Communication error (outdoor PCB & inverter PCB)

E7 Outdoor DC fan motor lock P1 Open phase or voltage unbalance E8 Ac input over current P4 Heat sink thermistor short/open E9 EXV error PJ Capacity setting error EA 4 way valve error U0 Insufficient gas

F3 Discharge pipe overheat U2 DC voltage out of range F6 Heat exchanger overheat U4 Communication error

HO Compressor sensor system error U7

Communication error (outdoor PCB & IPM PCB)

H3 High pressure switch error UA Installation error H6 Compressor feedback detection error UF

Piping & wiring installation mismatch/wrong wiring/insufficient gas

H7

Fan motor overloaded/over current/sensor fault

UH Anti freeze (other rooms)

H8 AC current sensor error

MCQUAY Service Guide Book Diagnosis

64

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

Error

Code

Faulty Indication

Error Code

Faulty Indication

E01 Require manual reset (possible causes) E19 Indoor coil sensor 4 short E02 Compressor 1 high temperature (overload) E20 Indoor coil sensor 1 open E03 Compressor 2 high temperature (overload) E21 Indoor coil sensor 2 open E04 Compressor 3 high temperature (overload) E22 Indoor coil sensor 3 open E05 Compressor 4 high temperature (overload) E23 Indoor coil sensor 4 open E06 Compressor 1 high pressure trip / contact open E24 Outdoor coil sensor 1 short E07 Compressor 2 high pressure trip / contact open E25 Outdoor coil sensor 2 short E08 Compressor 3 high pressure trip / contact open E26 Outdoor coil sensor 3 short E09 Compressor 4 high pressure trip / contact open E27 Outdoor coil sensor 4 short

E10

Compressor 1 trip/low refrigerant/outdoor abnormal

E28 Outdoor coil sensor 1 open

E11

Compressor 2 trip/low refrigerant/outdoor abnormal

E29 Outdoor coil sensor 2 open

E12

Compressor 3 trip/low refrigerant/outdoor abnormal

E30 Outdoor coil sensor 3 open

E13

Compressor 4 trip/low refrigerant/outdoor abnormal

E31 Outdoor coil sensor 4 open

E14 Room sensor short E32 Compressor 1 de-ice E15 Room sensor open E33 Compressor 2 de-ice E16 Indoor coil sensor 1 short E34 Compressor 3 de-ice E17 Indoor coil sensor 2 short E35 Compressor 4 de-ice E18 Indoor coil sensor 3 short

MCQUAY Service Guide Book Diagnosis

65

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 Possible causes Action

1. MB & economizer communication fail

Communication wires not connected

Connect correctly and operate again.

External noise / interference Avoid from noise source / add ferrite core. Main PCB / Economizer PCB faulty

Replace main PCB / economizer PCB.

2. Memory Error EEPROM data corrupted Replace main PCB and operate again.

3. Economizer Error Refer to the economizer board

error code table.

Refer to the economizer board error code table.

4. ESD contact open Normally close ESD contact

become open

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

5. Compressor 1 / 2 overload

Insufficient airflow / Air short circuit

Ensure no obstacle around the unit.

Heat exchanger dirty Ensure no dirt or dust on filter and coil. Refrigerant overcharge / undercharge

Recharging with correct amount of

refrigerant. Condenser fan motor faulty Replace fan motor. EXV or EXV PCB defective Replace EXV or EXV PCB. Compressor malfunction Replace compressor. Main PCB faulty Replace main PCB.

6. Compressor 1 / 2 low pressure trip

Refrigerant undercharge Top up with correct amount of refrigerant. Pressure switch faulty Replace pressure switch. Main PCB faulty Replace main PCB.

7. Compressor 1 / 2 high pressure trip

Insufficient airflow / Air short circuit

Ensure no obstacle around the unit.

Heat exchanger dirty Ensure no dirt or dust on filter and coil. Condenser fan motor faulty Replace fan motor. Refrigerant overcharge Recharging with correct amount of

refrigerant. EXV or EXV PCB faulty Replace EXV or EXV PCB. High Pressure switch faulty Replace pressure switch. Main PCB faulty Replace main PCB.

8. Compressor 1 / 2 discharge overheat

Discharge sensor malfunction Replace new discharge sensor. Insufficient airflow / Air short circuit

Ensure no obstacle around the unit.

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

MCQUAY Service Guide Book Diagnosis

66

Condenser fan motor faulty Replace fan motor. Main PCB faulty Replace main PCB.

9. Disconnection of discharge thermistor 1 / 2

Poor sensor connection Connect correctly and operate again.

10. Heat Exchanger 1 / 2 high temperature

Discharge sensor malfunction / poor sensor connection

Connect sensor correctly / replace

sensor. Insufficient Air Flow / Air Short Circuit

Ensure no obstacle around the unit.

Heat Exchanger Dirty Ensure no dirt or dust on filter and coil. Condenser fan motor faulty Replace new motor Compressor malfunction Replace new compressor. EXV or EXV PCB faulty Replace new EXV. Main PCB faulty Replace main PCB.

11. Indoor HEX 1 / 2 abnormal temperature

Poor coil sensor connection Connect sensor correctly / replace new

sensor. Compressor malfunction Replace new compressor. Leaking in piping joint Fix the leak point / Change coil. EXV or EXV PCB faulty Replace new EXV. Main PCB faulty Replace main PCB.

12. Indoor fan overload Motor internal over current protection faulty

Replace indoor fan motor.

Winding resistance out of spec Fan motor short body Main PCB faulty Replace main PCB

13. Return air sensor short /

open

Faulty Sensor / Poor sensor connection

Connect sensor correctly / replace sensor.

14. Outdoor air sensor

short / open

Faulty Sensor / Poor sensor connection

Connect sensor correctly / replace sensor.

15. Comp discharge sensor

1 / 2 short

Faulty Sensor / Poor sensor connection

Connect sensor correctly / replace sensor.

16. Comp discharge sensor

1 / 2 open

Faulty Sensor / Poor sensor connection

Connect sensor correctly / replace sensor.

17. Outdoor HEX sensor 1 /

2 short

Faulty Sensor / Poor sensor connection

Connect sensor correctly / replace sensor.

18. Outdoor HEX sensor 1 /

2 open

Faulty Sensor / Poor sensor connection

Connect sensor correctly / replace sensor.

19. Indoor HEX sensor 1 / 2

short

Faulty Sensor / Poor sensor connection

Connect sensor correctly / replace sensor.

20. Indoor HEX sensor 1 / 2

open

Faulty Sensor / Poor sensor connection

Connect sensor correctly / replace sensor.

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.

MCQUAY Service Guide Book Diagnosis

67

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.

MCQUAY Service Guide Book Diagnosis

68

G17 – Inverter Y Models

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.

Temperature

Display Section

TIMER CANCEL Button OFF TIMER Button

MODE Button

MCQUAY Service Guide Book Diagnosis

69

GS01 – Inverter Y Models

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.

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 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

MCQUAY Service Guide Book Diagnosis

70

Error Codes for G17 and GS01 – Inverter Y Models

Error

Codes

Error Description

Error

Codes

Error Description

00 Normal F3 Discharge pipe overheat

U0 Insufficient gas

F6

Heat exchanger overheat

U2 DC voltage out of range

H0 Compressor sensor system abnormality

U4 Communication error

H3 High pressure switch error

U7

Signal transmission error (on outdoor unit PCB)

H6 Position sensor abnormality

UA Installation error

H8 AC current sensor error

UF

Communication Error (indoor and outdoor) piping and wiring

H9 Outdoor air thermistor short / open

UH Anti-freeze function in other room

J1 Pressure sensor error

A1 Indoor PCB error

J3

Compressor discharge pipe thermistor short /open / misplaced

A3 Water pump error

J5 Suction pipe thermistor short/ open

A5 Antifreeze

J6 Outdoor heat exchanger

A6 Indoor fan motor abnormal

J7

Subcooling heat exchanger thermistor short/ open

C4

Indoor heat exchanger thermistor short/ open

J8 Liquid pipe thermistor short/ open

C9 Indoor room thermistor short/ open

J9 Gas pipe thermistor abnormality

E1

Outdoor PCB error

LC

Communication error (control PCB and inverter PCB)

E3

High pressure protection

L1

Outdoor PCB error

E4

Low pressure protection

L3

Electrical box temperature rise

E5

Compressor motor lock

L4

Heat sink overheat

E6

Compressor start-up error

L5

IPM error / IGBT error

E7

Outdoor DC fan motor lock

L9

Stall prevention

E8

Ac input over current

P1

Open phase or voltage unbalance

E9

EXV error

P4

Heat sink thermistor short / open

EA

4-way valve error

PJ

Capacity setting error

MCQUAY Service Guide Book Diagnosis

71

APJ1 –M5WMY10/15KR

Indoor LED Indication

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.

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 Codes:

Error Code

Description

SYSTEM

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

Description

OUTDOOR UNIT

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

Faulty discharge pipe temperature sensor

J6

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

Timer Cancel

MCQUAY Service Guide Book Diagnosis

72

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 MC201-C G17 A(5)CKD 10/15/20 C MC201-C G17 A(5)CMD 20/25/28 E MC201-C G17 A(5)CMD 40/50 D MC201-C G17 A(5)CMD 62 C MC201-C G17 A(5)CCD 10/15/20/25/30/40/50/60 C MC201-C MC301 A(5)DBD 80/100 MC201-A MC301

Error Diagnosis by Indoor Unit LED Indicator

● OFF ○ ON BLINK

Error Diagnosis by Wired Controller (MC301)

ITEM CODE DESCRIPTION

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

9 E8 Sensor Broken (TH8 ambient temp) 10 E9 Sensor Broken (TH9 outlet coil) 11 EA Sensor Broken (TH10 subcool outlet) 12 EB Sensor Broken (TH11 subcool suction) 13 EC Sensor Broken (TH12 suction) 14 EF Emergency Run 15 F0 Outdoor Storage Malfunction 16 F1 Sensor Broken (indoor inlet coil) 17 F2 Sensor Broken (indoor mid coil)

ITEM

TYPE COOL / HEAT

(Green / Red)

SLEEP / FAN

(Red / Orange)

TIMER / DRY

(Orange)

1 Indoor Sensor Error

● ●

2 Indoor Pump Error

●

3 Communication Error

● ●

4 Outdoor Sensor Error

●

5 Compressor Overload

● ●

6 Pressure Switch Trip

●

7 Pressure Sensor Error

○

8 System Failure

9 Others

○ ○

MCQUAY Service Guide Book Diagnosis

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Error Diagnosis by Wired Controller (MC301)

ITEM CODE DESCRIPTION

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

MCQUAY Service Guide Book Diagnosis

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(B) Outdoor Units

Model Board Handset MDS 30/40/50/60/70 A/AR V4.0 – V4.5 G17/ MC301 MDS 80/100/120/150/180/200/240/ 260/300/320 B/BR

V2.0 – V2.7 G17/ MC301

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

V2.1A – V2.6A G17/ MC301

Error code diagnosis by PCB four Digit 7-Segment

MDS-A Series:

ITEM CODE DESCRIPTION

1 E0 Discharge temperature sensor malfunction 2 E1 Outdoor ambient temperature sensor malfunction 3 E2 Suction temperature sensor malfunction 4 E3 Compressor base temperature sensor malfunction 5 E4 Coil inlet temperature sensor malfunction 6 E5 Coil middle temperature sensor malfunction 7 E6 Coil outlet temperature sensor malfunction 8 E7

Compressor discharge temperature too high > 130⁰C

9 E8 General system failure

10 H1 High pressure trip 11 H2 Digital scroll compressor overload 12 H3 Fixed scroll compressor overload 13 L1 Low pressure trip 14 C- Communication failure between outdoor and all indoors 15 CX “X” indoor no. Particular indoor no communication

MDS-B Series:

ITEM CODE DESCRIPTION

0

EC00

00## indoor unit communication 62

ER62

Refrigerant released

1

EC01

01# indoor unit communication failure

63

ER63

Slaver outdoor unit communication failure

2~47

….

02~47# indoor unit communication failure

64

ER64

TH1 temperature sensor failure

48

ER48

Digital Compressor Overload 65

ER65

TH2 temperature sensor failure

49

ER49

Fix 1 Compressor Overload 66

ER66

TH3 temperature sensor failure

50

ER50

Fix 2 Compressor Overload 67

ER67

TH4 temperature sensor failure

51

ER51

Fix 3 Compressor Overload 68

ER68

TH5 temperature sensor failure

52

ER52

Discharge pressure too high 69

ER69

TH6 temperature sensor failure

53

ER53

Suction pressure is too low 70

ER70

TH7 temperature sensor failure

54

ER54

Outdoor unit’s IC error 71

ER71

TH8 temperature sensor failure

55

ER55

System Error 72

ER72

TH9 temperature sensor failure

56

ER56

Discharge temperature is too high 73

ER73

TH10 temperature sensor failure

57

ER57

- 74

ER74

TH11 temperature sensor failure

58

ER58

4 way valve failure 75

ER75

TH12 temperature sensor failure

59

ER59

Ambient temperature is beyond the limit

76

ER76

Discharge pressure sensor failure

60

ER60

Emergency run 77

ER77

Suction pressure sensor failure

61

ER61

Sub heating is beyond the limit 78

EC78

All indoor units Communication Failure

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

MCQUAY Service Guide Book Diagnosis

75

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 Suggested Action

The unit does not work

Check the power supply Check to make sure that the rated voltage

is supplied. Check the fuse Check and replace the fuse. Check the remote controller timer setting

Make sure the delay timer is set correctly.

Fan does not work Check the power supply Check to make sure that the rated voltage

is supplied. Check the fan motor capacitor Check and replace the capacitor. Check the fan motor Check and replace the fan motor. Check the switch Check and change the switch.

Fan work, but compressor does not work

Check if the thermostat setting too high

Reset thermostat.

Check the compressor capacitor Check and replace the capacitor. Check the compressor Check and replace the compressor. Check the compressor contactor Check and replace the contactor.

Air conditioner work but cooling not satisfactory

Check if the thermostat setting too high

Reset thermostat.

Check if the condenser coil dirty Clean the condenser coil. Check the condenser installation condition

Make sure the condenser is installed

According to factory’s recommendation. Diagnosis by service port pressure and operating Current

Check for insufficient refrigerant.

The air flow is too low

Check the air filter Check and make sure the air filter is clean. Check the fan / blower condition Check and make sure that the fan / blower

are in good condition.

The remote controller light is dim

Check the battery Check and replace the battery.

Make sure the batteries are correctly

inserted.

MCQUAY Service Guide Book Diagnosis

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7.5 General Troubleshooting Guide

By means of pressure readings:

Pressure Probable Cause

Too Low

A Little Low

Normal

A Little

High

Too High

High Side

Low Side

1. Overcharged with refrigerant.

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

3. Obstructed air-intake / discharge.

4. Short circuit of hot air at condensing unit.

High Side

Low Side

1. Poor compression / no compression (compressor defective).

2. Check valve stick in open position.

3. Reversing valve leaking (for heatpump only).

High Side

Low Side

1. Undercharged with refrigerant.

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).

High Side

Low Side

1. Outdoor fan blocked (cooling).

2. Outdoor coil dirty (cooling).

3. Indoor fan locked (heating).

4. Indoor filter clogged dirty (heating).

High Side

Low Side

1. Air intake temperature of indoor unit too high.

Data

Circuit

MCQUAY Service Guide Book Appendix

77

APPENDIX

A. Resistance – Temperature Characteristics

Model ALL ON/OFF UNIT, FAN COIL UNIT Resistance R25=10.0kΩ + 1.0% - 1.0% B Value B25/30=3450K + 1.0% - 1.0%

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

MCQUAY Service Guide Book Appendix

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Model M5WMY10/15KR; M5LCY10/15ER; M5LCY30/40/50/60FR Resistance R25=20.0kΩ + 1.0% - 1.0%

T°C A (kΩ) B (kΩ) T°C A (kΩ) B (kΩ) T°C A (kΩ) B (kΩ)

-20 197.81 192.08 20 25.01 24.45 60 4.96 4.87

-19 189.53 181.16 21 23.91 23.37 61 4.79 4.70

-18 175.97 170.94 22 22.85 22.35 62 4.62 4.54

-17 166.07 161.36 23 21.85 21.37 63 4.46 4.38

-16 156.80 152.38 24 20.90 20.45 64 4.30 4.23

-15 148.10 143.96 25 20.00 19.56 65 4.16 4.08

-14 139.94 136.05 26 19.14 18.73 66 4.01 3.94

-13 132.28 128.63 27 19.32 17.93 67 3.88 3.81

-12 125.09 121.66 28 17.54 17.17 68 3.75 3.68

-11 118.34 115.12 29 16.80 16.45 69 3.62 3.56

-10 111.99 108.96 30 16.10 15.76 70 3.50 3.44

-9 106.03 103.18 31 15.43 15.10 71 3.38 3.32

-8 100.41 97.73 32 14.79 14.48 72 3.27 3.21

-7 95.14 92.61 33 14.18 13.88 73 3.16 3.11

-6 90.71 87.79 34 13.59 13.31 74 3.06 3.01

-5 85.49 83.25 35 13.04 12.77 75 2.96 2.91

-4 81.08 78.97 36 12.51 12.25 76 2.86 2.82

-3 76.93 74.94 37 12.01 11.76 77 2.77 2.72

-2 73.01 71.14 38 11.52 11.29 78 2.68 2.64

-1 69.32 67.56 39 11.06 10.84 79 2.60 2.55

0 65.84 64.17 40 10.63 10.41 80 2.51 2.47

1 62.54 60.96 41 10.21 10.00

2 59.43 57.94 42 9.81 9.61

3 56.49 55.08 43 9.42 9.24

4 53.71 52.38 44 9.06 8.88

5 51.09 49.83 45 8.71 8.54

6 48.61 47.42 46 8.37 8.21

7 46.26 45.14 47 8.05 7.90

8 44.05 42.98 48 7.75 7.60

9 41.95 40.94 49 7.46 7.31

10 39.96 39.01 50 7.18 7.04

11 38.08 37.18 51 6.91 6.78

12 36.30 35.45 52 6.65 6.53

13 34.62 33.81 53 6.65 6.53

14 33.02 32.25 54 6.65 6.53

15 31.50 30.77 55 6.41 6.29

16 30.06 29.37 56 6.18 6.06

17 28.70 28.05 57 5.95 5.84

18 27.41 26.78 58 5.74 5.43

19 26.18 25.59 59 5.14 5.05

Note: Sensor A – Outdoor air, coil and pipes (except for discharge pipe thermistor) Sensor B – Fin

MCQUAY Service Guide Book Appendix

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Model M5LCY30/40/50/60FR Discharge Pipe Sensor Resistance R25=230.0kΩ + 1.0% - 1.0%

T°C

Resistance

(kΩ)

T°C

Resistance

(kΩ)

T°C

Resistance

(kΩ)

T°C

Resistance

(kΩ)

-6 1120.0 42 109.0 90 18.1 140 4.1

-4 1002.5 44 100.2 92 16.9 142 3.9

-2 898.6 46 92.2 94 15.8 144 3.7

0 806.5 48 84.9 96 14.8 146 3.5

2 724.8 50 78.3 98 13.9 148 3.3

4 652.2 52 72.2 100 13.1 150 3.2

6 587.6 54 66.7 102 12.3 152 3.0

8 530.1 56 61.6 104 11.5 154 2.9

10 478.8 58 57.0 106 10.8 156 2.7

12 432.9 60 52.8 108 10.2 158 2.6

14 392.0 62 48.9 110 9.6 160 2.5

16 355.3 64 45.3 112 9.0 162 2.3

18 322.4 66 42.0 114 8.5 164 2.2

20 292.9 68 39.0 116 8.0 166 2.1

22 266.3 70 36.3 120 7.1 168 2.0

24 242.5 72 33.7 122 6.7 170 1.9

26 221.0 74 31.4 124 6.4 172 1.9

28 201.6 76 29.2 126 6.0 174 1.8

30 184.1 78 27.2 128 5.7 176 1.7

32 168.3 80 25.4 130 5.4 178 1.6

34 154.0 82 23.7 132 5.4 180 1.5

36 141.0 84 22.1 134 4.8

38 129.3 86 20.7 136 4.6

40 118.7 88 19.3 138 4.3

Model M5MSY20/25/30BR Resistance R25=20.0kΩ + 1.0% - 1.0%

T°C Resistance (kΩ) T°C Resistance (kΩ)

-20 211.0 20 25.0

-15 150.0 25 20.0

-10 116.5 30 16.0

-5 88.0 35 13.0

0 67.2 40 10.6

5 51.9 45 8.7

10 40.0 50 7.2

15 31.8

MCQUAY Service Guide Book Appendix

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B. MDS Compatibility

Indoor PCB vs Wired Handset MC301

MC301

Indoor 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

PCB Indoor PCB

V4.0 V4.1 V4.2 V4.3 V4.4 V4.5

mc201_2.0

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

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_2.0 mc201_2.1 mc201_2.2 mc201_2.3 mc201_2.4 mc201_2.5 mc201_2.6 mc201_2.7

Remark: 1) When Outdoor PCB 2.6-2.7 replacing 2.5 or below and 2.5A-2.8A 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.

2) When Outdoor PCB 2.4-2.7 replacing 2.3 or below, dip switch setting for outdoor capacity might be different, details

please refer to MDS Service Manual.

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

N

ot Compatible

Compatible

MCQUAY Service Guide Book Appendix

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C. MDS Outdoor Capacity Dip Switch Setting

MDS-B PCB version 2.3 and below:

Dip Switch S3.1 S3.2 S3.3 S3.4

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:

Dip Switch S2.3 S3.1 S3.2 S3.3 S3.4

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

MCQUAY Service Guide Book Appendix

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D. Cable Length of Wired Handset

No. Wired Handset Cable Type

Cable Length (m)

Standard Optional Maximum

1 SLM 3

UL2547 AWG26

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

2 Netware 3

UL2547 AWG26

10m 15m 20m

3 Netware 3C

UL2547 AWG26

10m 15m 20m

4 SQ-LCD

UL2547 AWG26

Not Provided Not Provided 100m

5 Chiller Panel

UL2547 AWG26

2m Not Provided 960m

6 RT Panel

UL2547 AWG26

15m Not Provided 960m

7 SLM 9

UL2547 AWG26

10m Not Provided 15m

8 MC301

UL2547 AWG24

10m Not Provided 10m

9 MC303 RS485 AWG20 20m Not Provided 1000m

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