Mitsubishi SKM32ZA Specifications

1171174. INVERTER MULTI-SPLIT SYSTEMROOM AIR-CONDITIONER(Air to air heat pump type)(OUTDOOR UNIT)SCM68ZA(INDOOR UNIT)SKM22ZA SRRM40ZASKM25ZA

1264.2.2 Range of usage & limitationsIndoor intake air temperature(Upper, lower limits)Indoor unitsthat can beused incombinationLength for one i

1274.2.3 Exterior dimensions(1) Indoor unitModels SKM22ZA, 25ZAA75075924060746.97.56262 7.516VIEW A65615150450 150Room temp. thermistorTerminal bloc

128Model SKM50ZAUnit: mmModels SKM32ZA, 40ZAA79015 675160621816780VIEW A15 760170450 170Room temp. thermistorTerminal blockPiping for Gas (Ø12.7) 390P

129Model SRRM40ZA• Details of air outletø 4 × 8 (Holes for tapping screws)Air outletAir inlet540 100100105 220 90 220 105150 3050170 204032035670 (Sus

1304.2.4 Piping system Model SCM68ZA(2) Outdoor unit Model SCM68ZAGas lineLiquid line(Ø12.7)(Ø9.52)(Ø6.35)(Ø6.35)(Ø6.35)EVAStraine

1314.2.5 Selection chartCorrect the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity

1324.3 ELECTRICAL DATAMeaning of marks• Outdoor Unit• Indoor UnitFMICFISMTrZNRDMFSParts nameFan motorCapacitor (for FMI)Flap motorTransformerVaristo

133Model SKM50ZAZNRBack upswitchWirelessR-AmpDisplayJS54321BLRDWHBKPower line(Outdoor unit)321Y/GNFMISMCNECNMCNUCNH CNF CNGThI-H(Humidity)ThI-A ThI-RY

134(2) Outdoor unitModel SCM68ZAPower source1 Phase220/230/240V 50HzUnitAUnitBUnitCMarkColor markColorL123123123Fuse250V 25ACTPCB (POWER)BKWHRDPKBLW

135FAN SPEED ON/OFFMODETEMPAIR FLOWSET TIMER TIMERACLHI POWERECONOCONT HI POWER ECONOON OFFTIMERAUTOHIMEDLOFAN SPEED indicatorIndicators the ¡ for th

118CONTENTS4.1 GENERAL INFORMATION ...1194.1.1 Specific features...

136(3) Back-up switchWhen the remote controller become weak, or if the remote controller is lost or malfunctioning, this switch may be used to turn th

137¡ The flap operation as shown above will be repeated.Sway operationSway operation(4) Flap controlControl the flap by AIRFLOW button on the wireless

138(5) Comfort timer setting(a) SKM modelIf the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling o

139Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capacityof the outdoor unit, the deman

140(b) Mode switchingWithin the selected mode, the unit operates using the values shown below which were obtained by multiplying a conversioncoefficie

1411st speed¡ Values of a, babAt 0 Hz command 22 25Other than 0 Hz17 19commandNote (1) Refer to the table shown above right for the values a and b.¡Ho

142(f) Defrosting(i) When the following conditions are met, the defrosting operation will start.1) During normal operationa) When 30 minutes has passe

1433) Operation of function component in defrosting4) Conditions for finishing defrostingWhen any of the following conditions is met, the defrosting f

1442) Start of protection for compressorWhen the inverter decision frequency is 36 Hz or more, compressor protection starts.1 Start of protection I (W

145(h) Current safe control1) When the converter input current detected by the current sensor (CT) exceeds the set value, the frequency is reduced by2

1194.1 GENERAL INFORMATION4.1.1 Specific features(1) The long piping makes the location of the inside and units flexible.¡ No need for additional

146Outdoor unit frequency4-Way valve(20S)EEVAEEVBEEVCOutdoor unit fanFunctional componentsOperationHeating Cooling HeatingIf stopped by outdoor protec

1474.5 APPLICATION DATASAFETY PRECAUTIONS¡ Please read these “Safety Precautions” first then accurately execute the installation work.¡ Though the p

148¡Horizontal level adjustment of the board is conductedwith four temporarily tightened screws.¡Adjust so that the board will be horizontal with ther

149Use cables for interconnection wiring to avoid loosening of the wires.CENELEC code for cables Required field cables.H05 RNR4G1.5 (Example)H Harmoni

150¡ Loosen and remove the spring-type clamp.¡ Remove with your hand or a pairof pliers.¡Use a hexagonal wrench to correctlyinsert the drain cap which

151Indoor unitHook (2 locations)InstallationboardInstalationboardIndoor unitbase lower hookWallInstalling steps1.Hook the upper part of the indoor uni

1525) Connecting the drain pipesa) Insert the drain hose as far as possible through the lower section of the side of the unit, and secure it with clam

1534.5.3 Installation of outdoor unit(1) Selection of installation location(Please install with the customer’s consent in a location that follows th

154CURRENT LIMIT SWONOFF11A MAX.AMP.SW5SW6SW5SW68.5ASW5SW64.5.4 Setting for current limit SW (for SCM68YA, cooling only type)¡ Locations to secure t

1554.5.5 Electrical wiringUNIT A123123UNIT BUNIT A UNIT B123123UNIT CUNIT C123123Power sourceNLEarthleakagebreakerCircuitbreaker[POWER SUPPLY CODE]C

120ItemModelsSKM22ZA SKM25ZA SKM28ZACooling capacity W 2200 2500 2800Heating capacity W 3200 3400 4000Noise level Cooling Sound leveldBHi

156(2) Connection of refrigerant piping¡ The service valve corresponding to each indoor unit is as illustrated in the right figure.¡ Regarding the cha

157(3) Air purgingTo protect the global environment, use a vacuum pump that do not release flourocarbon gas into the atmosphere.(a) Remove the cap on

158(5) Heat insulation for jointHeat insulation for joints Finish and fixingPosition sothe slitcomes on top.Vinyl tapeCover the joint withinsulation m

1594.5.8 Installation of optional parts (Ceiling recessed type) Table of optional parts Examples of Installation(1) Air outlet duct(a) Part number:

160(c) InstallationThe following is the procedure for installing the air outlet grille for suspended ceiling (RKB12).(d) Installation procedure1) Moun

161518 (Air outlet opening)127 12742772190158 1616Air outlet grilleFlat countersunk head screwPan-head screwAir outlet grilleIndoor unitMounting hardw

162(3) Bottom air inlet grille set(a) Part number: RTS12(b) Parts list(c) Installation(d) Installation procedure1) Mount the duct for the air inlet

163(c) Installation(d) Installation procedure1) Use the bolts (M8 × 2) to secure thesuspension hardware so that it is 90 mmbelow the ceiling surface.2

164Indoor unit (Flat surface drawing)215 310 215 12523097 455570310130 130 97Round duct connection port95 95190ø 150(5) Flexible duct(6) Duct joint fo

165◆ Air flow and external static pressure characteristics (Heating: Hi)SRRM40ZA◆Air outlet unit air flow and friction loss characteristics● Air outle

121ItemModelsSKM32ZA SKM40ZA SKM50ZACooling capacity W 3200 4000 5000Heating capacity W 4500 5400 6700Noise level Cooling Sound leve

166(7) Drain up kit(a) Part No. : RDU12E(b) Accessories(d) Installation of drain up kit1) Fix the drain up kit on the right side of theinside unit wit

1674) Use hard PVC general purpose pipes VP-25 sold on the marketfor drain pipes after draining up.5) Tighten the PVC pipe securely with the attached

1684.6 MAINTENANCE DATA4.6.1 Trouble shooting(1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all

169(2) Indication of self diagnosisIndoor unit indicatorRUN lamp1 time flash2 time flash5 time flash6 time flashKeeps flashingKeeps flashingComes onCo

170(3) Inspection procedures corresponding to detail of troubleThermistor error[Broken thermistor wire,connector poor connection]Is connector connecti

171Outdoor unit error[Broken power transistor,broken compressor wire]Is output voltage applied to all 3phases of power transistor?YESYESNONOInspect c

172Indoor fan motor error[Defective fan motor,defective PCB]YESYESNONOIs connector connection good?Is voltage applied to fan motor?(Between White - R

173(6) Indoor electrical components inspection flow-chartNote (1) Excepted 50 modelIs there voltage between terminal blocks 1 and 2 ? (AC 220/230/240

174(7) Inverter failure diagnosisIf the results of the diagnosis in Item (3) indicate that the inverter is defective, perform the following inspection

175● Inspection of resistance value of discharge-pipe thermistor.Remove the connector and check the resistance value. See the section of thermistor ch

122(b) Ceiling recessed typeModel SRRM40ZAItemModelSRRM40ZACooling capacity W 4000Heating capacity W 6000Noise level Cooling Sound le

176Liquid sideGas sideCheck jointService hoseCharge hoseVacuumpumpRefrigerantcylinderGaugemanifold4.6.2 Servicing(1) EvacuationThe evacuation is an

123ItemModelSCM68ZACooling capacity W 6800 (1800~7000)Heating capacity W 7300 (2000~7600)Power source 1 Phase 220/230/240V 50HzPower consumption

124(3) Operation data¡The combinations of the indoor units is indicated by numbers. They are read as follows.(Example) SKM22ZA / 22 SKM50ZA / 50¡T

125(b) CoolingIndoor unitcombinationHeating capacity (kW) Power consumption (W) Standard current (A)Room heating capacity (kW)Total capacity (kW)A roo