Mitsubishi SCM45ZA User Manual Download Page 1

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191

INVERTER MULTI-SPLIT SYSTEM
ROOM AIR-CONDITIONER[2room]

(Air to air heat pump type)

(OUTDOOR UNIT)
SCM45ZA

(INDOOR UNIT)
SKM22ZA
SKM25ZA
SKM28ZA
SKM32ZA
SKM40ZA

Summary of Contents for SCM45ZA

Page 1: ...191 191 6 INVERTER MULTI SPLIT SYSTEM ROOM AIR CONDITIONER 2room Air to air heat pump type OUTDOOR UNIT SCM45ZA INDOOR UNIT SKM22ZA SKM25ZA SKM28ZA SKM32ZA SKM40ZA...

Page 2: ...5 Selection chart 202 6 3 ELECTRICAL DATA 203 6 3 1 Electrical wiring 203 6 4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 205 6 5 APPLICATION DATA 215 6 5 1 Installation of indoor unit 216 6 5 2 In...

Page 3: ...ck with the indoor and outdoor unit fans controlled to changes in frequency thus controlling the power Allowing quick heating cooling operation during start up period Constant room temperature by fine...

Page 4: ...M C thermostat Pilot lamp RUN Green TIMER Yellow Safety equipment O D mm in 6 35 1 4 9 52 3 8 12 7 1 2 Connecting method Flare connecting Attached length of piping Liquid line 0 4m Gas line 0 35m Ins...

Page 5: ...Core Number mm in Liquid line 6 35 1 4 2 Gas line 9 52 3 8 2 Connecting method Flare connecting Attached length piping Insulation Necessary Both Liquid Gas lines Power source supply Terminal block Sc...

Page 6: ...0 4 5 5 4 2 8 2 6 2 5 2 3 2 0 2 8 2 6 2 5 2 2 2 8 3 0 3 1 3 3 3 6 2 8 3 0 3 1 3 4 B room Min Standard Max Min Standard Standard Max 1 4 1 4 1 4 1 4 1 4 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 2 3 4 4 0...

Page 7: ...2 0 2 2 2 5 2 8 3 2 4 0 4 4 4 5 4 6 4 7 4 8 4 5 4 6 4 7 4 8 2 5 2 8 3 0 3 5 4 5 4 7 4 8 4 9 5 0 5 1 4 8 4 9 5 0 5 1 350 350 350 350 350 680 680 680 680 680 680 680 680 680 750 900 1040 1200 1580 1750...

Page 8: ...ime Stop time Voltage fluctuation Voltage drop during start Interval unbalance Difference in height between indoor units C Within 3 of rated voltage Within 15 of rated voltage Within 10 of rated volta...

Page 9: ...6 35 420 Piping hole 65 Piping hole 65 Piping hole right left 178 3 250 46 15 19 9 236 5 4 5 36 117 40 37 36 56 9 49 Unit mm Model SKM28ZA A 790 15 67 51 60 62 18 16 780 VIEW A 15 760 170 450 170 Room...

Page 10: ...le right left Unit mm 174 3 275 187 5 61 46 9 260 117 37 6 36 56 9 49 2 Outdoor unit Model SCM45ZA Ground terminal Liquid line service valve B Unit Liquid line service valve A Unit 42 5 14 13 5 84 7 9...

Page 11: ...Thermistor ThO D Thermistor ThO A Thermistor ThO R Heat exchanger Heat exchanger Liquid line Gas line 6 35 6 35 9 52 9 52 Strainer Suction Accumulator Compressor Discharge Muffler 4 way valve Service...

Page 12: ...hanger during heating In additions to the foregoing corrections 1 2 the heating capacity needs to be adjusted also with respect to the frosting on the outdoor heat exchanger 15 ISO T1 Standard Conditi...

Page 13: ...Reactor Diode stack Electric expansion valve 4 way valve coil Symbol Tho A Tho R Tho D LED2 LED1 3 Parts name Thermistor outdoor air temp Thermistor outdoor H X temp Thermistor comp dome temp Warning...

Page 14: ...ED1 LED3 LED2 Red GY DS IC2 P RD U WH BK Tho A Tho R CND CNC CNA CNF CNE CNA Tho D V W N BL OR WH L WH BK UNIT A UNIT B Power source 1 Phase 220 240V 50Hz Printed circuit board Fuse 250V 25A Printed c...

Page 15: ...has been set AIR FLOW indicator Indicator selected flap mode OPERATION MODE select button Each time the button is pushed the indicator is switched over in turn ON OFF button This button when pressed s...

Page 16: ...s remote control a Natural flow AUTO The flap will be automatically set to the angle of air flow best to operation 1 Starting time of operation ON OFF The flap operation as shown above will be repeate...

Page 17: ...lculating the temperature difference Example Heating Setting temperature Room temperature Operation starting time Time Setting time 15 min 10 min 5 min earlier earlier earlier If the difference Settin...

Page 18: ...Cooling Thermostat OFF All indoor units Thermostat OFF Some of indoor units Fan stop abnormal stop Some of indoor units Failure Outdoor Unit Fixed Automatic b Mode switching Within the selected mode t...

Page 19: ...40 minutes after the last defrosting based on cumu lative operation time of compressor b When the outdoor heat exchanger thermistor Tho R temperature is 2 C or less for 3 continuous minutes after 37...

Page 20: ...ing pattern Note 1 indicates currect operation 1 2 Example First operation Second operation Notes Different mode is only fan operation Selected Mode Cooling Heating RemoteControlDisplay Cooling Heatin...

Page 21: ...starting from an outdoor unit speed of 0 rps d Current safe and compressor overheat protection are enabled even when this function is in operation b Heating overload protection control During heating...

Page 22: ...ecision rps 58 pulse or EEV control According to outdoor rps OFF ON OFF According to outdoor rps According to outdoor rps Corresponding expansion valve for unit with serial signal that has heating 0 r...

Page 23: ...will not start on the 4 times j Compressor overheat protection The detection temperature of the compressor dome thermistor Tho D is used to prevent oil deterioration and damage to the motor wire due...

Page 24: ...turned on o Stop mode Decision speed is 0 rps when the protection function for the outdoor controller is operating when restarting due to operation change 10 Regulation of outdoor air flow a The fan...

Page 25: ...ve use circuits are used Insufficient power source circuit capacity and defective installment execution can be the cause of electric shocks and fires Accurately connect wiring using the proper cable a...

Page 26: ...t the rear cut off the lower and the right side portions of the sleeve collar as shown by the broken line Reference hole 450 Level surface matching mark Horizontal level adjustment of the board is con...

Page 27: ...ttom of the pipe and change its direction before stretching it and shaping it Wall Gutter Pipes storage area When conducting the central rear piping use a nipper to cut out knock out holes in the inst...

Page 28: ...elow the heat exchanger and confirm that the water is drained outside If the extension drain hose is indoors make sure it is insulated using a shielding pipe not supplied 5 Securing the Indoor Unit to...

Page 29: ...ll with the customer s consent in a location that follows the conditions listed below a Where the following installation space is available and where air does not gather b Where rain and sunlight do n...

Page 30: ...umbers on the terminal board of the indoor and outdoor connections are correct e After connecting the crossover wires to the terminal board use wiring clamps to secure the wiring Use cables for interc...

Page 31: ...ction of pipes When connecting the pipes to the outdoor unit be careful about the discharge of fluorocarbon gas or oil Make sure to match the pipes between the indoor unit and the outdoor unit with th...

Page 32: ...d b For this multi type room air conditioner it is not necessary to charge the refrigerant for the total maximum length in all the rooms 1 Charge amount at the time of shipment c Ensure that there are...

Page 33: ...hieved and may damage the compressor Correct connections Example of wrong connections A unit A B B unit Outdoor unit Indoor unit Indoor unit Piping Wiring A unit A B B unit Outdoor unit Installation t...

Page 34: ...again Temporarily turn off the power source and turn it on again in about 1 min and turn the unit on again YES NO YES YES Does the trouble occur again Disconnect connectors and connect them again Oper...

Page 35: ...tion When heat exchanger entrance thermistor temper ature of 50 C or under continued for more than 3 seconds while operation is stopped This is not displayed during operation When an error with the ou...

Page 36: ...4 65 10 135 1 3 Thermistor temperature characteristics Room temp indoor and outdoor unit heat exchanger temp outdoor temp Comp dome thermistor temperature characteristics Temperature C Shortcircuit B...

Page 37: ...d Inspect compressor Defective inverter YES YES NO NO YES Compressor overheat Gas shortage defective comp dome thermistor Is comp dome thermistor resistance value good Is sufficient quantity of refrig...

Page 38: ...40 V measured between ter minals 1 and 2 on the outdoor unit Is the electrical system operating properly fuse reactor etc Does the voltage between terminals 2 and 3 on the outdoor unit oscillate bet w...

Page 39: ...mperature thermistor Continuous compressor operation command is not released Release of continuous compressor operation command Continuous compressor operation command is not released Anti frosting Ho...

Page 40: ...s are normal Is there voltage between CNC 1 and 2 on the secondary side of the transformer Approx 12 V Is the voltage between terminal blocks 2 and 3 oscillating between DC 0 and 12V Inspect power sou...

Page 41: ...H VOLTAGE High voltage is produced in the control box Don t touch electrical parts in the control box for 5 minutes after the unit is stopped 1 2 3 1 2 3 1 2 Y GN Y GN WH BK BL WH BK RD Serial A Seria...

Page 42: ...e A Firstly loose the connecting portion of the charge hose A at the gauge manihold side and open the valve 3 for a few seconds and then immediately retighten it after observing that gas is blow out f...

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