McQuay M5MAC Troubleshooting Guide

ServiceGuideBook

9Controller Development HistoryHandset ModelYear Main BoardWireless Wired Cooling HeatingRemarksWM 10/15D WM 10/15DR Copper sensor1996 Challenger 2.1

10Handset ModelYear Main BoardWireless Wired Cooling HeatingRemarks2002 Chilled Water W1V3 G6SLM3 /Netware 2 (optional)WM-FW / CE-DW / CC-CW / CK-AW /

11Handset Operating GuideG6 OutlookOperation Guide1. “ON/OFF” Switchv Press to start the air conditioner unit.v Press again to stop the unit.2. Temper

125. Timer Settingv Press set button to activate the timer setting (from 1 hour to 15 hour) of the air conditioning unit. It willbe in “On” or “Off” c

13G7 OutlookOperation Guide1. Transmission Sourcev The source where the signal will be transmitted.2. Signal Transmission Indicationv Blink to confirm

145. Operation Modev Press the MODE button to select the type of operating mode.v For cooling only unit, the available modes are : COOL, DRY & FAN

15G11 OutlookOperation Guide1. “ON/OFF” Buttonv Press once to start the air conditioner unit.v Press again to stop the unit.2. Temperature Settingv T

164. Fan speed selectionv Press the D button continuously will toggle the fan speed in the following order: Low ( ) –––:Med ( ) –––: High ( ) –––: Au

17G17 OutlookOperation Guide1. Transmission Sourcev The source where the signal will be transmitted.2. Signal Transmission Indicationv Blink to confir

185. Automatic Air Swing (optional)v Press the SWING button to activate the automatic air swing function.v To distribute the air to a specific d

1Table of ContentsModel Name Product Name Description 2 Nomenclature 3Conversion Table Conversion Table 6Product Mainboard vs. Handset Matrix P

19SLM3 OutlookSLM AC-5300 (OPTIONAL)Operation Guide1. “ON/OFF” Switchv Press to start the air conditioner unit.v Press again to stop the unit.2. Tempe

206. “SLEEP” Modev Press button to activate the sleep function. This function can only be activated under “cool” or heatingmode operation. When it is

21Sequential ControllerOutlookOperating Guide1. “ON/OFF” Switch •Pressoncetostarttheairconditioningunit.• Press again to stop the unit.•

224. Auxiliary Electric Heater •Ifthe“HEAT”modeprovidesinsufficientheatingtoaroomevenatthehighesttemperature setting (30°C), pre

23OutlookFeaturesThis controller has a Power LED indicator, IR receiver, a LCD display panel, 5VDC power supply input, andone or two ways communicatio

244. Sleep Mode Setting • PresstheSLEEPkeytoactivatesleepmode.ThisfunctionisavailableunderCOOL,HEAT & AUTO mode. • Whenit

25Controller ConfigurationAuto Random Restart •ShortedatJH/JP1/J_LSTjumperatmainboardforautorestart(supplied). • Removethejumpertoh

26Hot Keep SelectionOther 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 (12k

27Auxiliary Heater ConversionTo convert the standard U1.5 heatpump PCB to with auxiliary heater application, the following components need to be added

28Multi Split ConversionCooling 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 swi

2Product Name DescriptionNo. Description Generic Model Name McQuay Brand1 Wall Mounted Fan Coil Unit WM / 5WM MWM / M5WM2 Wall Mounted AC Inverter Fan

29Sequential ControllerIt is allowed to configure the controller to suit individual’s need with details below:Model Selection1. Number of CompressorT

30Model Diff. Temperature1 compressor Not. Applicable2 compressors 0.5°C3 compressors 1.0°C4 compressors 1.5°CDip switch 6a. Fan off Offb. Fan on OnMo

31Start2 secondsIndoor fanOutdoor fan 115 seconds15 seconds15 seconds15 secondsOutdoor fan 2Outdoor fan 3Outdoor fan 42 seconds2 seconds2 seconds2 sec

329. Conversion from Old Sequential Board to New Sequential Board(For wiring up to 1000 meters)9.1 Sequential Main Board SQMB01 (Old Version)9.2 Seque

339.3 Sequential Main Board SQMB01 (New Version)9.4 Sequential LCD Panel SQ-LCD (New Version) Part: 2051-MAX1483 IC :MAX1483 Jumper J1 andJ2 removedS

34VALVE jumper HEAT jumperHeatpump Mode & Valve ApplicationHeatpump Mode & Valveless Application XCooling Mode & Valve Application XCoolin

35Jumper Configuration Model Operating ModesM1 2 Pipes without Aux. Heater 1 Heat>Cool>Dry>FanM2 2 Pipes with Aux. Heater 2 Heat>Cool>D

36Self Diagnosis TableWall Mounted F Series Cooling Only ModelService DiagnosisModel Board HandsetWM 10/15/20/25F, 311 D2.0LED Indicator Light Displa

37Wall Mounted F Series Heat Pump ModelModel Board HandsetWM 10/15/20/25FR, 301R U1.5 G7LED Indicator Light DisplayLED Light Diagnosis TableOperation

38 Wall Mounted G Series ModelModel Board HandsetWM 10/15/20/25G/GR L2.0 G11 / SLM3 / Netware 3LED Indicator Light DisplayLED Light Diagnosis TableOp

3NomenclatureIndoor UnitMWM010GR-ACIAAElectricalA : 220-240V/1Ph/50HzF : 380-415V/3Ph/50HzMarket RegionC : Export with CE markAir Treatment Devices &a

39Ceiling Cassette A / B / C Series ModelModel Board HandsetCK 20/25/30/40/50A/AR U1.5CK 15/20/25B/BR U1.5CK 10/15/20C/CR U1.5LED Indicator Light D

40Ceiling Cassette A / B / C Series ModelModel Board HandsetCK 20/25/30/40/50A/AR L208ACK 15/20/25B/BR L208ACK 10/15/20C/CR L208ALED Indicator Lig

41Ceiling Exposed D Series ModelModel Board HandsetCE 20/25/30/40/50D/DR U1.5LED Indicator Light Display - CoolingLED Indicator Light Display – Heati

42Ceiling Exposed D / E Series ModelModel Board HandsetCE 20/25/30/40/50D/DR L208ACE 15/20/25/28E/ER L208ALED Indicator Light Display - CoolingLED

43Seven Segment Display – SLM3 / Netware 3Model Board HandsetWM 10/15/20/25FR, 301R U1.5 SLM3 / Netware 3CK 20 - 50A/AR U1.5 SLM3 / Netware 3CK 15 -

44Ducted Blower B/C/D/ER Series Model – Single CompressorRooftop Packaged Air Conditioner – Single CompressorModel Board HandsetSB 75 – 100B/BR L208A

45Ducted Blower B/D/ER Series Model – Multi CompressorsRooftop Packaged Air Conditioner – Multi CompressorsModel Board HandsetSB 150B2/BR2 – 600B4/BR4

46Wall Mounted F Series Inverter ModelModel Board HandsetWMX 10/15FR VA2.0LED Indicator Light DisplayLED Light Diagnosis TableOperation / Faulty Indic

47Wall Mounted G Series Inverter ModelModel Board HandsetWMX 10/15/20/25G/GR VA3.0LED Indicator Light DisplayLED Light Diagnosis TableOperation /

48Ceiling Cassette A/C Series Inverter ModelModel Board HandsetCKX 20/25A/AR VA3.0CKX 10/15/20C/CR VA3.0LED Indicator Light Display - CoolingLED In

4MWM010GW-AXAAElectricalA : 220-240V/1Ph/50HzF : 380-415V/3Ph/50HzProduct Specifications VariationAA : RevisionConnection TypeF : FlareX : Not Applica

49Ceiling Convertible E Series Inverter ModelModel Board HandsetCEX 15/20/25E/ER VA3.0LED Indicator Light Display - CoolingLED Indicator Light Displ

50Seven Segment Display Model Board HandsetWMX 10 – 25G/GR VA3.0 SLM3CKX 20 – 25A/AR VA3.0 SLM3CKX 10 – 20C/CR VA3.0 SLM3CEX 15 – 25E/ER VA3.0 SLM

51Inverter Outdoor Unit ModelSLX 10/15/20/25C/CRMSV 25/35AMSX 20/25/30A/ARNormal running / compressor running RED LED blinkingNo. of Blinks Blinking I

52Chilled Water Fan Coil UnitModel Board HandsetWM 05 – 25FW, 301W W1V3CK 20 – 50AW/AWH W1V3CK 15 – 25BW W1V3CK 10 – 20CW W1V3CE 20 – 50DW/CBW W

53Wall Mounted G Series Model – Water Source Split UnitModel Board Handset5WMWS 10/15/20/25GR LWS2.0 G11 / SLM3 / Netware 3LED Indicator Light Displa

54Ceiling Cassette A / B / C Series Model – Water Source Split UnitModel Board Handset5CKWS 20/25/30/40/50AR LWS2.05CKWS 10/15/20CR LWS2.0LED Indica

55Seven Segment Display – SLM3 / Netware 3 (Water Source Split Unit)Model Board Handset5WMWS 10/15/20/25GR LWS2.0 SLM3 / Netware 35CKWS 20 - 50A/AR L

56General CheckWhen any air conditioner malfunction is noted, immediately switch off the power supply to the unit and contact the local dealer if nece

57General Troubleshooting GuideBy means of pressure readings.Pressure Probable CauseToo LowA Little LowNormalA Little HighToo HighHigh SideLow Side1.

58By means of diagnostic flow chart:Generally, there are two kinds of problems, i.e. starting failure and insufficientcooling/heating. “Starting failu

5Indoor UnitMLC010CR-ACPOAElectricalA : 220-240V/1Ph/50HzF : 380-415V/3Ph/50HzMarket RegionC : Export with CE markCompressorP : PanasonicM : Mitsubis

59FaultyFaultyCondenserfan contactorCoil burntContact faultyFan motor faultyOther electricalcomponent faultyChange the contactorChange the contactsRep

60ii ) Diagnosis of Refrigerant Circuit / ApplicationThere might be some causes where the unit starts running but does not performsatisfactorily, i.e.

61RestrictedInsufficient heatingAircirculationIndoor / outdoor coil dirty(clogged)Indoor air filter dirtyClean the coilClean the filterFan motor malfu

62Mini Chiller: Troubleshooting GuideWhen any malfunction is occurred, immediately switch off the power supply to the unit, and contact the localdeale

63Rooftop: Troubleshooting GuideBefore you ask for repair service, check the following pointsSymptoms Switch Box(Field Supply)Possible Causes Troubles

AppendixResistance – Temperature CharacteristicsType DTN-C1 03F3H-OYL 1128, 1148, 1158Material Name 3HResistance R25=10.000k + 1.0% - 1.0%B Value B25/

Lot 60334, Persiaran Bukit Rahman Putra3,Taman Perindustrian Bukit Rahman Putra,P.O.Box 79, 47000 Sungai Buloh, Selangor D.E., MalaysiaTel: 603-614586

6Conversion TableConversion TableCapacityBtu/hr MBH kCal/Hr kW1 0.001 0.252 0.293 x 10-31000 1 252 0.2933.968 0.004 1 1.162 x 10-33412 3.412 860.04 1P

7Product Mainboard vs.Handset MatrixHandsetType No.Main Board (IC)ModelL2.0 L208A U1SB125 SQ2.0 VA2.0Standard Optional1 WM - F Series X G7 SLM3 + AC53

8HandsetType No.Main Board (IC)ModelW2 MCH1 MC1.0 LWS2.0 APM01CB APM02DStandard Optional13 WM – GW Series XSLM3 + AC5300 /Netware 314CK – AW/AWH/CWSer