McQuay MWM Service Manual Book
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McQuay MWM Service Manual Book

McQuay MWM Service Manual Book

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  • Page 1 Service Guide Book...

  • Page 2: Table Of Contents

    Table of Contents Model Name Product Name Description Nomenclature Conversion Table Conversion Table Product Mainboard vs. Handset Matrix Product Mainboard vs. Handset Matrix Controller Development History Controller Development History Handset Operating Guide SLM3 Sequential LCD Netware 3 Controller Configuration Auto Random Restart Hot Keep Selection Auxiliary Heater Conversion Multi Split Conversion...

  • Page 3: Model Name

    Model Name Product Name Description...

  • Page 4: Nomenclature

    Model Type R : Heat Pump Omitted if Cooling Only Series G : G Series Capacity 010 : 10,000 Btu/h Model Name WM : Wall Mounted CK : Ceiling Cassette Refrigerant 5 : R410A Omitted if R22 Brand M : McQuay...
  • Page 5 W : Chilled Water Fan Coil Omitted if DX Cooling Only Series G : G Series Capacity 010 : 10,000 Btu/h Model Name WM : Wall Mounted CK : Ceiling Cassette Refrigerant 5 : R410A Omitted if R22 Brand M : McQuay...
  • Page 6 R : Heat Pump Omitted if Cooling Only Series C : C Series Capacity 010 : 10,000 Btu/h Model Name LC : Single Split Condensing Unit MC : Modular Split Condensing Unit Refrigerant 5 : R410A Omitted if R22 Brand M : McQuay...

  • Page 7: Conversion Table

    Conversion Table Conversion Table Capacity Btu/hr kCal/Hr 0.001 0.252 0.293 x 10 1000 0.293 3.968 0.004 1.162 x 10 3412 3.412 860.04 Pressure W.G. Pascal kg/cm (in.) (ft.) (Pa) 0.07 27.7 2.309 0.69 x 10 14.22 394.08 32.84 9.81 x 10 3.61 x 10 2.538 x 10 0.083...
  • Page 8 Product Mainboard vs. Handset Matrix...

  • Page 10: Controller Development History

    Controller Development History...

  • Page 12: Handset Operating Guide

    Handset Operating Guide Outlook TEMP MODE TIMER SLEEP SWING Operation Guide 1. “ON/OFF” Switch Press to start the air conditioner unit. Press again to stop the unit. 2. Temperature Setting Set the desire room temperature. Press button to increase or decrease the set temperature. Setting range are between 16°C TO 30°C setting (60°F to 80°F) (Optional setting from 20°C to 30°C).
  • Page 13 5. Timer Setting Press set button to activate the timer setting (from 1 hour to 15 hour) of the air conditioning unit. It will be in “On” or “Off” condition after the set time depending to the current condition (either from “On” to Off”...

  • Page 14: Operation Guide

    Outlook AUTO Operation Guide 1. Transmission Source The source where the signal will be transmitted. 2. Signal Transmission Indication Blink to confirm the last setting has been send to the unit. 3. On/Off Button Press once to start the air conditioner. Press again to stop the unit.
  • Page 15 5. Operation Mode Press the MODE button to select the type of operating mode. For cooling only unit, the available modes are : COOL, DRY & FAN. For heat pump unit, the available modes are : AUTO, COOL, DRY, FAN & HEAT. 6.

  • Page 16: G11

    Outlook Operation Guide 1. “ON/OFF” Button Press once to start the air conditioner unit. Press again to stop the unit. 2. Temperature Setting To set the desired room temperature, press the ▲ button to increase or button to decrease the ▼...
  • Page 17 4. Fan speed selection Press the button continuously will toggle the fan speed in the following order: Low ( ) –––: Med ( ) –––: High ( ) –––: Auto Stop pressing when the desired fan speed appears on the display screen. 5.

  • Page 18: G17

    Outlook P1 P2 MODE SLEEP CANCEL CANCEL 6a 6b Operation Guide 1. Transmission Source The source where the signal will be transmitted. 2. Signal Transmission Indication Blink to confirm that the last setting has been transmitted to the unit. 3. Temperature Setting To set the desired room temperature, press the button to increase or decrease ▲...
  • Page 19 5. Automatic Air Swing (optional) Press the SWING button to activate the automatic air swing function. To distribute the air to a specific direction, press the SWING button and wait until the louver move to the desired direction and press the button once again. 6a.

  • Page 20: Slm3

    SLM3 Outlook AC-5300 (OPTIONAL) Operation Guide 1. “ON/OFF” Switch Press to start the air conditioner unit. Press again to stop the unit. 2. Temperature Setting Set the desired room temperature. Press button to increase or decrease the set temperature. Setting range are between 16 C to 30 F to 80 3.
  • Page 21 6. “SLEEP” Mode Press button to activate the sleep function. This function can only be activated under “cool” or heating mode operation. When it is activated under “cool” mode operation, the set temperature will increase 0.5°C after 30 minutes, 1°C after 1 hour and 2°C after 2 hours. If it is activated under “HEAT” mode operation, the set temperature will be decreased 0.5°C after 30 minutes, 1°C after 1 hour and 2°C after 2 hours.

  • Page 22: Sequential Lcd

    Sequential Controller Outlook A : Time display B : Error indication C : Compressor running display (up to 4 compressors) D : Key lock display E : Heat display (up to 2 heaters) F : Energy saving mode display G : Compressor defrost cycle display (up to 4 compressors) H : Operation mode display : Temperature set display...
  • Page 23 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. 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.

  • Page 24: Netware 3

    Netware 3 Outlook 1. Time display 2. Key lock display 3. Error indication 4. Fan speed display 5. Operation mode display 6. Sleep mode display 7. Air swing display 8. Temperature set display Operating Guide 1. “ON/OFF” Switch • Press once to start the air conditioning unit. • Press again to stop the unit.
  • Page 25 4. Sleep Mode Setting • Press the SLEEP key to activate sleep mode. This function is available under COOL, HEAT & AUTO mode. • When it is activated in COOL mode, the set temperature will be increased 0.5°C after 30mins, 1°C after 1 hour and 2°C after 2 hours. • When it is activated in HEAT mode, the set temperature will be decreased 1°C after 30mins, 2°C after 1 hour and 3°C after 2 hours. 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.

  • Page 26: Controller Configuration

    Controller Configuration Auto Random Restart • Shorted at JH/JP1/J_LST jumper at main board for auto restart (supplied). • Remove the jumper to have non-auto restart. D2.0 U1.5 / SQ2.0 L2.0 / L208A / LW2 / W2...

  • Page 27: Hot Keep Selection

    Hot Keep Selection Three selections available: a. Fan stop if indoor coil temperature < 30°C (OFF). b. Fan runs at low speed if indoor coil temperature < 30°C and stop if indoor coil temperature < 18°C (ON). c. Cycle of low fan running for 30s and fan off for 120s and repeat (INTERVAL).

  • Page 28: Auxiliary Heater Conversion

    Auxiliary Heater Conversion To convert the standard U1.5 heatpump PCB to with auxiliary heater application, the following components need to be added onto the PCB. 1. Heater relay 2. Transistor 3. Diode...

  • Page 29: Multi Split Conversion

    Multi Split Conversion Cooling Only Model (L2.0 / L208A) The cooling only model WM-G, CK-A/B/C, CE-E, CC-C which are using L2 control board can be switched to multi split units without any modification needed. Heatpump Model (L2.0 / L208A) WM-GR The Multi Split mode can be selected at the slide switch on the On/Off Switch Board;...

  • Page 30: Sequential Controller

    Sequential Controller It is allowed to configure the controller to suit individual’s need with details below: Model Selection 1. Number of Compressor The control can be configured into 4 main type’s base on number of compressors by changing “R42” values: Item Type R value...
  • Page 31 The default differential temperature is base on number of compressor model, the setting is as below: Model Diff. Temperature 1 compressor Not. Applicable 2 compressors 0.5°C 3 compressors 1.0°C 4 compressors 1.5°C 4. Hot Keep Option Dip switch 6 a. Fan off b.
  • Page 32 7. Sequential Control for Cool Mode The starting sequence for indoor fan, outdoor fan and compressors is shown as below: 2 seconds Start Indoor fan 15 seconds 2 seconds Outdoor fan 1 Compressor 1* 15 seconds 2 seconds Outdoor fan 2 Compressor 2* 15 seconds 2 seconds...
  • Page 33 9. Conversion from Old Sequential Board to New Sequential Board (For wiring up to 1000 meters) 9.1 Sequential Main Board SQMB01 (Old Version) Rework instruction: SQMB01 (Main Board) from old version to new version Step 1: Remove Jumper J1 and J2. Step 2: Add Part: 2051-MAX1483 IC :MAX1483 to U8 J1 &...
  • Page 34 9.3 Sequential Main Board SQMB01 (New Version) Part: 2051-MAX1483 IC :MAX1483 Jumper J1 and J2 removed 9.4 Sequential LCD Panel SQ-LCD (New Version) SQLCD (LCD Panel) from old to new Step 1: Remove Jumper: J1, J2 Step 2: Add Chip Resistor. 1/10W 5% 200K to R8, R9, R10 Step 3: Add Part: 1000000030 IC: SMD MAX1483CSA to U4...

  • Page 35: Chilled Water Fan Coil Unit - W1V3

    Chilled Water Fan Coil Unit (W1V3) The standard W1V3 board comes with a VALVE jumper. The system can be configured as the jumper selection listed below: VALVE jumper HEAT jumper Heatpump Mode & Valve Application Heatpump Mode & Valveless Application Cooling Mode & Valve Application Cooling Mode & Valveless Application √ : Jumper Remained X : Jumper Removed VALVE & HEAT Jumper Location Model: WM 05-25FW 1. VALVE jumper is plugged into JVLV connector on the emergency switchboard. 2. HEAT jumper is plugged into JMODE connector on the emergency switchboard. Model: CK 20-50AW, CK 15-25BW, CK 10-20CW, CE 20-50DW and CC 10-60CW 1. VALVE jumper is plugged into JVLV connector on the main board.

  • Page 36: Chilled Water Fan Coil Unit - W2.0

    Chilled Water Fan Coil Unit (W2.0) The system model can be configured via the following jumpers. For each model selected, the permissible operating modes are as follows: Jumper Configuration Model Operating Modes 2 Pipes without Aux. Heater Heat>Cool>Dry>Fan 2 Pipes with Aux. Heater Heat>Cool>Dry>Fan 4 Pipes + Boiler Heat>Cool>Dry>Auto>Fan 4 Pipes + Boiler Heat>Cool>Dry>Fan The standard W2.0 board comes with a VALVE jumper. The system can be configured as the jumper selection listed below: VALVE jumper...

  • Page 37: Service Diagnosis

    Service Diagnosis Self Diagnosis Table Wall Mounted F Series Cooling Only Model Model Board Handset WM 10/15/20/25F, 311 D2.0 LED Indicator Light Display TIMER POWER SLEEP LED Light Diagnosis Table Operation / Faulty Indication Timer On Sleep mode On Dry mode Defrost mode Continuously Room air sensor contact loose / short...
  • Page 38 Wall Mounted F Series Heat Pump Model Model Board Handset WM 10/15/20/25FR, 301R U1.5 LED Indicator Light Display COOL (Green) (Orange) HEAT / FAN SLEEP (Red / Green) (Red) LED Light Diagnosis Table Operation / Faulty Indication Cooling mode Dry mode Fan mode Heating mode Auto mode in heating operation...
  • Page 39 Wall Mounted G Series Model Model Board Handset WM 10/15/20/25G/GR L2.0 G11 / SLM3 / Netware 3 LED Indicator Light Display SLEEP COOL / HEAT TIMER IONIZER LED Light Diagnosis Table Operation / Faulty Indication COOL/HEAT (GREEN/RED) Cooling mode Green Heating mode Auto mode in heating operation Auto mode in cooling operation...
  • Page 40 Ceiling Cassette A / B / C Series Model Model Board Handset CK 20/25/30/40/50A/AR U1.5 G7 / SLM3 / Netware 3 CK 15/20/25B/BR U1.5 G7 / SLM3 / Netware 3 CK 10/15/20C/CR U1.5 G7 / SLM3 / Netware 3 LED Indicator Light Display - Cooling POWER TIMER SLEEP...
  • Page 41 Ceiling Cassette A / B / C Series Model Model Board Handset CK 20/25/30/40/50A/AR L208A G7 / SLM3 / Netware 3 CK 15/20/25B/BR L208A G7 / SLM3 / Netware 3 CK 10/15/20C/CR L208A G7 / SLM3 / Netware 3 LED Indicator Light Display - Cooling POWER TIMER SLEEP...
  • Page 42 Ceiling Exposed D Series Model Model Board Handset CE 20/25/30/40/50D/DR U1.5 G7 / SLM3 / Netware 3 LED Indicator Light Display - Cooling COOL LED Indicator Light Display – Heating COOL HEAT LED Light Diagnostic Table Operation / Faulty Indication Cooling mode Dry mode Fan mode...
  • Page 43 Ceiling Exposed D / E Series Model Model Board Handset CE 20/25/30/40/50D/DR L208A G7 / SLM3 / Netware 3 CE 15/20/25/28E/ER L208A G11 / SLM3 / Netware 3 LED Indicator Light Display - Cooling COOL LED Indicator Light Display – Heating COOL HEAT LED Light Diagnostic Table...
  • Page 44 Seven Segment Display – SLM3 / Netware 3 Model Board Handset WM 10/15/20/25FR, 301R U1.5 SLM3 / Netware 3 CK 20 - 50A/AR U1.5 SLM3 / Netware 3 CK 15 - 25B/BR U1.5 SLM3 / Netware 3 CK 10 - 20C/CR U1.5 SLM3 / Netware 3 CE 20 - 50D/DR...
  • Page 45 Ducted Blower B/C/D/ER Series Model – Single Compressor Rooftop Packaged Air Conditioner – Single Compressor Model Board Handset SB 75 – 100B/BR L208A SLM3 SB 75 – 100D L208A SLM3 SB 75 – 100ER L208A SLM3 SB 125 – 150B/BR U1SB125 SLM3 SB 125CR...
  • Page 46 Ducted Blower B/D/ER Series Model – Multi Compressors Rooftop Packaged Air Conditioner – Multi Compressors Model Board Handset SB 150B2/BR2 – 600B4/BR4 SQ2.0 SQ-LCD SB 125D2 – 500D4 SQ2.0 SQ-LCD SB 125ER2 – 600ER4 SQ2.0 SQ-LCD RT 150 – 420A/AR SQ2.0 SQ-LCD Error Code...
  • Page 47 Wall Mounted F Series Inverter Model Model Board Handset WMX 10/15FR VA2.0 LED Indicator Light Display Stand-by / COOL / DRY HEAT TIMER LED Light Diagnosis Table Operation / Faulty Indication Cooling mode Dry mode Stand-by / Fan mode Heating mode Auto mode Defrost mode Compressor overload protection...
  • Page 48 Wall Mounted G Series Inverter Model Model Board Handset WMX 10/15/20/25G/GR VA3.0 LED Indicator Light Display SLEEP COOL / HEAT TIMER IONIZER LED Light Diagnosis Table Operation / Faulty Indication COOL/HEAT (GREEN/RED) Cooling mode Green Heating mode Auto mode Orange Timer On Sleep mode On Ionizer On...
  • Page 49 Ceiling Cassette A/C Series Inverter Model Model Board Handset CKX 20/25A/AR VA3.0 CKX 10/15/20C/CR VA3.0 LED Indicator Light Display - Cooling POWER TIMER SLEEP LED Indicator Light Display – Heating POWER TIMER HEAT LED Light Diagnostic Table Operation / Faulty Indication Cooling mode Timer On Sleep mode On...
  • Page 50 Ceiling Convertible E Series Inverter Model Model Board Handset CEX 15/20/25E/ER VA3.0 LED Indicator Light Display - Cooling COOL LED Indicator Light Display – Heating COOL HEAT LED Light Diagnostic Table Operation / Faulty Indication Cooling mode Dry mode Fan mode Heating mode Defrost mode Indoor temperature sensor loose / short...
  • Page 51 Seven Segment Display Model Board Handset WMX 10 – 25G/GR VA3.0 SLM3 CKX 20 – 25A/AR VA3.0 SLM3 CKX 10 – 20C/CR VA3.0 SLM3 CEX 15 – 25E/ER VA3.0 SLM3 CCX 10 – 25C/CR VA3.0 SLM3 Cooling / Heat pump Model Seven Segments Faulty Indication E1 blinking...
  • Page 52 Inverter Outdoor Unit Model SLX 10/15/20/25C/CR MSV 25/35A MSX 20/25/30A/AR Normal running / compressor running RED LED blinking No. of Blinks Blinking Indication Normal running, with no limitation Voltage limit Cooling unit: outdoor coil temperature limit Heating unit: indoor coil temperature limit Total current limit Discharge temperature limit Cooling unit: indoor coil temperature limit...
  • Page 53 Chilled Water Fan Coil Unit Model Board Handset WM 05 – 25FW, 301W W1V3 G7 / SLM3 / Netware 3 CK 20 – 50AW/AWH W1V3 G7 / SLM3 / Netware 3 CK 15 – 25BW W1V3 G7 / SLM3 / Netware 3 CK 10 –...
  • Page 54 Wall Mounted G Series Model – Water Source Split Unit Model Board Handset 5WMWS 10/15/20/25GR LWS2.0 G11 / SLM3 / Netware 3 LED Indicator Light Display SLEEP COOL / HEAT TIMER IONIZER LED Light Diagnosis Table Operation / Faulty Indication COOL/HEAT (GREEN/RED) Cooling mode...
  • Page 55 Ceiling Cassette A / B / C Series Model – Water Source Split Unit Model Board Handset 5CKWS 20/25/30/40/50AR LWS2.0 G7 / SLM3 / Netware 3 5CKWS 10/15/20CR LWS2.0 G7 / SLM3 / Netware 3 LED Indicator Light Display – Heating POWER TIMER HEAT...
  • Page 56 Seven Segment Display – SLM3 / Netware 3 (Water Source Split Unit) Model Board Handset 5WMWS 10/15/20/25GR LWS2.0 SLM3 / Netware 3 5CKWS 20 - 50A/AR LWS2.0 SLM3 / Netware 3 5CKWS 10 - 20C/CR LWS2.0 SLM3 / Netware 3 5CCWS 10 - 60C/CR LWS2.0 SLM3 / Netware 3...

  • Page 57: General Check

    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.

  • Page 58: General Troubleshooting Guide

    General Troubleshooting Guide By means of pressure readings. Pressure Probable Cause Data Circuit 1. Overcharged with refrigerant. High Side 2. Non-condensable gases in refrigerant circuit (eg. Oil) Low Side 3. Obstructed air-intake / discharge. 4. Short circuit of hot air at condensing unit. 1.
  • Page 59 By means of diagnostic flow chart: Generally, there are two kinds of problems, i.e. starting failure and insufficient cooling/heating. “Starting failure” is caused by electrical defect while improper application or defects in refrigerant circuit causes “Insufficient cooling / heating”. i ) Diagnosis of Electric circuit Faulty Check Cause...
  • Page 60 Faulty Change the contactor Coil burnt Condenser fan contactor Change the contacts Contact faulty Fan motor faulty Repair or change the motor contactor Other electrical Repair or change if necessary component faulty Faulty Coil burnt Change the contactor Compressor contactor Change the contacts Contact faulty Open compressor...
  • Page 61 ii ) Diagnosis of Refrigerant Circuit / Application There might be some causes where the unit starts running but does not perform satisfactorily, i.e. insufficient cooling. Judgement could be made by measuring temperature difference of indoor unit’s intake and discharge air as well as running current. Check Cause Remedy...
  • Page 62 Insufficient heating Restricted Indoor / outdoor coil dirty Clean the coil (clogged) circulation Clean the filter Indoor air filter dirty Change or repair Fan motor malfunction the motor Obstruction at air inlet / outlet of indoor / outdoor Remove the obstruction unit High heating Windows / doors wide...

  • Page 65: Appendix

    Appendix Resistance – Temperature Characteristics Type DTN-C1 03F3H-OYL 1128, 1148, 1158 Material Name Resistance R25=10.000k + 1.0% - 1.0% B Value B25/30=3450K + 1.0% - 1.0% t°C Rmin (k ) Rnom (k ) Rmax (k ) t°C Rmin (k ) Rnom (k ) Rmax (k ) -10 4.42E+01 4.53E+01 4.65E+01 4.02E+01 4.12E+01...
  • Page 66 Lot 60334, Persiaran Bukit Rahman Putra3, Taman Perindustrian Bukit Rahman Putra, P.O.Box 79, 47000 Sungai Buloh, Selangor D.E., Malaysia Tel: 603-61458600 Fax: 60361412060 http://www.mcquayup.com...

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