Mitsubishi SCM80ZA Manual
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Mitsubishi SCM80ZA Manual

Inverter multi-split system room air-conditioner [4 room] (air to air pump type)
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3.
INVERTER MULTI-SPLIT SYSTEM
ROOM AIR-CONDITIONER[4 room]
(Air to air heat pump type)
(OUTDOOR UNIT)
SCM80ZA
(INDOOR UNIT)
SKM22ZA
SKM25ZA
SKM28ZA
SKM32ZA
SKM40ZA
SKM50ZA
SRRM40ZA
http://splitoff.ru/tehn-doc.html
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  • Page 1 INVERTER MULTI-SPLIT SYSTEM ROOM AIR-CONDITIONER[4 room] (Air to air heat pump type) (OUTDOOR UNIT) SCM80ZA (INDOOR UNIT) SKM22ZA SRRM40ZA SKM25ZA SKM28ZA SKM32ZA SKM40ZA SKM50ZA http://splitoff.ru/tehn-doc.html...

  • Page 2: Table Of Contents

    CONTENTS 3.1 GENERAL INFORMATION ................ 53 3.1.1 Specific features ................. 53 3.1.2 How to read the model name ............. 53 3.2 SELECTION DATA ..................54 3.2.1 Specifications ..................54 3.2.2 Range of usage & limitations ............. 63 3.2.3 Exterior dimensions................64 3.2.4 Piping system ..................

  • Page 3: General Information

    3.1 GENERAL INFORMATION 3.1.1 Specific features (1) The long piping makes the location of the inside and units flexible. ¡ No need for additional charge of refrigerant : 40 m ¡ Maximum piping length : 60 m (2) Connectable indoor capacity Number of connectable units : 3 to 4 units Total of indoor units (class kW) : 12 kW (3) Indoor units are available with 6 capacities, in 2 types and 7 models.

  • Page 4: Selection Data

    Necessary (Both Liquid & Gas lines) Drain hose Connectable Accessories (including) Mounting kit Optional parts — Outdoor units to be combined SCM80ZA Notes (1) The data are measured at the following conditions. Item Indoor air temperature Outdoor air temperature Standards Operation DB Cooling 27ºC...
  • Page 5 Necessary (Both Liquid & Gas lines) Drain hose Connectable Accessories (including) Mounting kit Optional parts — Outdoor units to be combined SCM80ZA Notes (1) The data are measured at the following conditions. Item Indoor air temperature Outdoor air temperature Standards Operation DB Cooling 27ºC...
  • Page 6 Necessary (Both Liquid & Gas lines) Drain hose Connectable Accessories (including) Mounting kit Optional parts See Page 98 Outdoor units to be combined SCM80ZA Notes (1) The data are measured at the following conditions. Item Indoor air temperature Outdoor air temperature Standards Operation DB Cooling 27ºC...
  • Page 7 (2) Outdoor unit Model SCM80ZA Model SCM80ZA Item Cooling capacity 8000 (1800~8600) Heating capacity 9500 (2000~10800) Power source 1 Phase 220/230/240V 50Hz Cooling 3270 (750~3700) Power consumption Heating 3140 (750~3800) Cooling 18.0/17.2/16.4 Running current Heating 17.2/16.6/16.1 Sound level Cooling : 48/48/49...
  • Page 8 (3) Operation data ¡ The combinations of the indoor units is indicated by numbers. They are read as follows. (Example) SKM22ZA / 22 SKM50ZA / 50 ¡ The capacity of the indoor units is shown by rooms. If this exceeds the maximum capacity of the outdoor unit, the demand capacity will be proportionally distributed.
  • Page 9 Heating capacity (kW) Power consumption (W) Standard current (A) Indoor unit combination Room heating capacity (kW) Total capacity (kW) Min. Standard Max. 220V 230V 240V A room B room C room D room Min. Standard Max. 22+40+40 10.6 1750 3170 3800 17.4 16.8...
  • Page 10 Heating capacity (kW) Power consumption (W) Standard current (A) Indoor unit combination Room heating capacity (kW) Total capacity (kW) Min. Standard Max. 220V 230V 240V A room B room C room D room Min. Standard Max. 22+28+28+28 10.6 1900 3170 3800 17.4 16.8...
  • Page 11 Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit combination Room cooling capacity (kW) Total capacity (kW) Min. Standard Max. 220V 230V 240V A room B room C room D room Min. Standard Max. 22+22+22 1750 2580 2930 14.2 13.6 12.9...
  • Page 12 Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit combination Room Cooling capacity (kW) Total capacity (kW) Min. Standard Max. 220V 230V 240V A room B room C room D room Min. Standard Max. 22+22+22+22 2100 3060 3450 16.8 16.1 15.3...

  • Page 13: Range Of Usage & Limitations

    3.2.2 Range of usage & limitations Model SCM80ZA Item Indoor intake air temperature (Upper, lower limits) Refer to the selection chart. Outdoor air temperature (Upper, lower limits) Indoor units Number of connected units 3 to 4 units that can be...

  • Page 14: Exterior Dimensions

    3.2.3 Exterior dimensions (1) Indoor unit Models SKM22ZA, 25ZA Unit: mm Room temp. thermistor Piping hole right (left) Terminal block 746.9 Piping for Gas ( 9.52) 370 Ø Piping for Liquid ( 6.35) 420 Ø Piping hole Piping hole Ø Ø...
  • Page 15 Models SKM32ZA, 40ZA Unit: mm Room temp. thermistor Piping hole right (left) Terminal block Piping for Gas 12.7) 390 Ø Piping for Liquid ( 6.35) 440 Ø Drain hose 600 ( Ø Piping hole Piping hole Ø Ø VIEW A Model SKM50ZA Unit: mm : http://splitoff.ru/tehn-doc.html...
  • Page 16 Model SRRM40ZA Unit: mm Suspension bolts (M8 × 4) (Procured by customer) Controller 670 (Suspension bolts pitch) Terminal block Air outlet Gas piping (ø 12.7) Drain hose Liquid piping (ø 6.35) (Connection opening diameter ø 16) • Details of air outlet ø...
  • Page 17 Unit: mm (2) Outdoor unit Model SCM80ZA Service valve Service valve (Liquid Ø6.35) Terminal block (Gas Ø12.7) Service valve Service valve (Liquid Ø6.35) (Gas Ø9.52) Service valve Service valve (Liquid Ø6.35) (Gas Ø12.7) Service valve Service valve (Liquid Ø6.35) (Gas Ø9.52) Opening for 145.2...

  • Page 18: Piping System

    3.2.4 Piping system Model SCM80ZA : http://splitoff.ru/tehn-doc.html...

  • Page 19: Selection Chart

    3.2.5 Selection chart Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be obtained in the following way. Net capacity = Capacity shown on specification × Correction factors as follows. (1) Coefficient of cooling and heating capacity in relation to temperatures Cooling Heating...

  • Page 20: Electrical Data

    3.3 ELECTRICAL DATA Meaning of marks • Outdoor Unit Symbol Parts name Symbol Parts name Compressor motor EEVA ~ D Electric expansion valve Capacitor 4 way valve (coil) Fan motor Tho-A Thermistor (outdoor air temp.) Reactor Tho-R Thermistor (outdoor H.X temp.) Serge absorber Tho-D Thermistor (discharge temp.)
  • Page 21 Model SKM50ZA Power line (Outdoor unit) Y/GN Color symbol Printed circuit bord 250V Black 3.15A Blue Yellow White Y/GN Yellow/Green Wireless R-Amp Back up switch Display (Humidity) Model SRRM40ZA Power line (Outdoor unit) Y/GN (250V · 3.15A) Color symbol Black COMI Blue Brown...
  • Page 22 (2) Outdoor unit Model SCM80ZA : http://splitoff.ru/tehn-doc.html...

  • Page 23: Outline Of Operation Control By Microcomputer

    3.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Remote Controller HI POWER operation indicator Indicators during HI POWER operation. FAN SPEED indicator ECONOMY operation indicator Indicators the ¡ for the fan speed which has been set. Indicators during ECONOMY operation. Operation switch over indicator Indicators the ¡...
  • Page 24 ¡ SKM50 model RUN (HOT KEEP) lamp (green) • Illuminates during operation. • Flashing at stop blowing due to the hot keep. HI POWER lamp (green) Illuminates during HI POWER operation. RUN HI POWER TIMER ECONO TIMER lamp (yellow) Illuminates during TIMER operation. ECONOMY lamp (orange) Illuminates during ECONOMY operation.
  • Page 25 (4) Flap control Control the flap by AIRFLOW button on the wireless remote controller. (a) AUTO The flap will be automatically set to the angle of air flow best to operation. 1) Starting time of operation ¡ SKM22, 25, 28, 32, 40 models In case of cooling In case of heating and dry operation...
  • Page 26 (b) Memory flap (Excepted 22, 25models) While the flap is operating if the AIRFLOW button is pushed once, it stops swinging at an angle. As this angle is memorized in the microcomputer, the flap will be automatically set to the angle when next operation is started.
  • Page 27 (6) Cooling operation (a) Summary 1) Capacity control Model SCM80ZA Capacity 1.8 ~ 8.6 kW Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capacity of the outdoor unit, the demand capacity will be proportionally distributed.
  • Page 28 (7) Heating Operation (a) Summary 1) Capacity control Model SCM80ZA Capacity 2.0 ~ 10.8 kW Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capacity of the outdoor unit, the demand capacity will be proportionally distributed.
  • Page 29 (iii) Finishing conditions When at least one of the hot stand-by cut conditions described below is met during the hot stand-by function is activated, the hot stand-by function becomes inoperable. 1) When the hot stand-by function is activated during the above-mentioned condition which was described in article 1 : 1 After 20 minutes elapsed since the power ON.
  • Page 30 ¡Hot keep M mode [During HI POWER operation (for 15 min.)] 8th speed 7th speed ¡ Values of a, b 6th speed 5th speed Indoor blower At 0 Hz command 4th speed Other than 0 Hz command 3rd speed 2nd speed 1st speed Indoor heat exchanger temp.
  • Page 31 Defrosting When the following conditions are met, the defrosting operation will start. 1) During normal operation When 30 minutes has passed since the start of heating or 30 minutes after the last defrosting (Cumulative actual operating time of compressor other than the outdoor unit frequency 0 Hz). When the outdoor heat exchanger thermistor temperature is –2 °C or less for 3 continuous minutes after 27 minutes have passed.
  • Page 32 (8) Determining the operating mode The cooling and heating operating modes are the remote control switch mode that have been previously determined. If a mode differing from these is selected after this, the selected mode will appear in the display of the remote control, but only the fan will operate.
  • Page 33 (d) Low Hz continuous operation protection control The following controls are performed to return the oil to the compressor when the outdoor frequency is less than 34 Hz and other than 0 Hz for 20 continuous minutes or more. Forced operation at outdoor frequency of 34 Hz is performed for 1 minute. The outdoor fan operates according to decision frequency and the expansion valve operates according to the outdoor frequency.
  • Page 34 Outdoor unit abnormal stop and compressor motor protection If the air conditioner is operating at an inverter frequency 30 Hz or more and an input current of 1 A or less is detected for 30 continuous seconds or more, a abnormal stop is performed. At the same time, LED 2 on the printed circuit board for the outdoor unit will flash 2 times at a 0.5 second interval every 8 seconds.
  • Page 35 (n) Serial transmission abnormality protection An abnormal stop is made if the outdoor unit does not receive serial signal commands, other than “Stop: 0 Hz,” from all the indoor controllers continuously for 1 minute and 55 seconds when the compressor is operating at an outdoor frequency of other than 0 Hz.

  • Page 36: Application Data

    3.5 APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these “Safety Precautions” first then accurately execute the installation work. ¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the WARNING section.

  • Page 37: Installation Of Indoor Unit

    3.5.1 Installation of indoor unit (1) Wall mounted type (SKM) (a) Caution for installation 1) The system should be applied to places as households, residences and the like. 2) The equipment shall be installed in accordance with national wiring regulations. 3) The connection to the fixed wiring of the mains supply must be made via a double pole isolating switch with a contact gap of at least 3mm in each pole.
  • Page 38 2) Drilling of holes in the wall and fixture of sleeve ¡ The connecting wires may touch the metal inside the wall and cause danger so it is necessary to always use the sleeve. Sleeve Pipe Sleeve Inclined plate Indoor side Outdoor side 5°...
  • Page 39 Cautions when piping from the left and the rear center of the unit [Top View] Left Side Piping Right Side Piping The piping can be removed from the rear, left, left rear, right and Left rear piping Right rear piping from under the unit.
  • Page 40 5) Securing the Indoor Unit to the Installation Board Installing steps Indoor unit Installation board Hook (2 locations) 1.Hook the upper part of the indoor unit to the installation board. Instalation board 2.The unit can be installed simply by gently push- Wall ing in the lower part.

  • Page 41: Installation Of Remote Controller

    4) Installing the main unit a) Attach the washers and nuts to the ceiling suspension bolts. b) Attach the suspension tool to the above nuts, and tighten the nuts. M8 suspension bolt M8 nut M8 large washer (standard accessory) M8 large washer (standard accessory) Main frame M8 spring lock washer M8 nut...

  • Page 42: Installation Of Outdoor Unit

    3.5.3 Installation of outdoor unit (1) Selection of installation location (Please install with the customer’s consent in a location that follows the conditions listed below.) Where the following installation space is available, and where air does not gather. (b) Where rain and sunlight do not directly hit the unit, and where there is enough air circulation. Also, where the unit cannot be buried by snow.

  • Page 43: Setup Of Volt Select Sw

    Securing the Unit ¡ Locations to secure the bolts. Unit: mm ¡ Use M10-M12 for the retaining bolts. ¡ Secure it firmly so the unit will not fall during earthquakes and from sudden gusts of wind. Drainage ¡ There are 3 holes in the bottom panel of the outdoor unit to drain condensation.

  • Page 44: Refrigerant Piping

    (d) Use the power supply wires specified below. Different wires may cause heat generation and fire. Do not to use unspecified wires. Never bundle, wind or treat the power wires. Otherwise, heat or fire may be generated. SCM80ZA Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables Required field cables.
  • Page 45 (2) Connection of refrigerant piping ¡ The service valve corresponding to each indoor unit is as illustrated in the right figure. ¡ Regarding the change in the sizes of gas side pipes (usage of the variable joints); if a 3.2/ 4.0/5.0 kW class indoor unit (gas side pipe 12.7) is going to be connected to the rooms A and C service valves (9.52), or if a 2.2-2.8 kW class indoor unit (gas side pipe 9.52) is Service valve...
  • Page 46 (Amount of uncharged Model On site additional charge (Maximum amount of refrigerant) *2 refrigerant) *1 SCM80ZA 40m (2600g) 20g/m 60m (3000g) *1: Charge amount at the time of shipment. *2: Maximum charge amount of the refrigerant (additional charge of 400g on site).

  • Page 47: Test Run And Handling Instruction

    3.5.7 Test run and handling instruction (1) Inspection Check according to the following check items. (2) Test run (1) Conduct the test run after turning on the power for 20 minutes. (Run electricity for 20 minutes with a hot stand-by to prevent compression of the compressor liquid.) (2) If the compressor does not operate after the operation has started, wait for 5 ~ 10 minutes.

  • Page 48: Installation Of Optional Parts (Ceiling Recessed Type)

    3.5.8 Installation of optional parts (Ceiling recessed type) Table of optional parts Air outlet duct Air outlet grille for Bottom air inlet grille set Air outlet unit for ceiling RFD12 suspended ceiling RTS12 (1 opening) RKB12 RTB12 Flexible duct ø150 Duct joint for air outlet plate Drain up kit S97684 (4 m) •...
  • Page 49 (c) Installation The following is the procedure for installing the air outlet grille for suspended ceiling (RKB12). (d) Installation procedure 1) Mount the air outlet duct to the indoor unit Tapping screw (ø 4 × 16) using the eight tapping screws. Motor cover Tapping screw (ø...
  • Page 50 (2) Air outlet grille for suspended ceiling (a) Part Number: RKB12 The air outlet grill for suspended ceiling is for mounting on the air outlet duct (RFD12) directly attached to the indoor unit. (b) Parts list Name Qty. Air outlet grille Pan-head screws Unit: mm (c) Installation...
  • Page 51 (3) Bottom air inlet grille set (a) Part number: RTS12 (b) Parts list Name Qty. Air inlet grille Duct for air inlet grille Tapping screw Pan-head screws Unit: mm (c) Installation 11.5 Indoor unit Indoor unit 762 (Ceiling opening dimensions) 258 (Ceiling opening dimensions) 278 (Ceiling opening dimensions) 782 (Panel dimensions)
  • Page 52 (c) Installation 357 (Suspension bolt pitch) Unit: mm Suspension bolt M8 × 2 166.5 166.5 (Procured by customer) Round duct connection port 45.5 45.5 Air outlet chamber 52.5 52.5 Ceiling Air outlet panel 377 (Ceiling opening dimension) (Ceiling opening dimension) (d) Installation procedure Use the bolts (M8 ×...
  • Page 53 (5) Flexible duct Part number Length (m) Diameter (ø mm) Parts provided S97682 • Connecting bands (2) S97683 –2 • Soft tape (2) S98223 S97684 (6) Duct joint for air outlet plate (a) Part number: RFJ22 The duct joint is to be used when connecting the flexible duct (ø 150 mm) to the indoor unit. (b) Part list Name Qty.
  • Page 54 Air flow and external static pressure characteristics (Heating: Hi) SRRM40ZA 60(6) 50(5) 40(4) 30(3) 20(2) Air flow (m /min) Air outlet unit air flow and friction loss characteristics Air inlet grille air flow and friction loss characteristics ● Air outlet unit (Part number: RTB12) (Part number: RTS12) (Air outlet chamber + Air outlet panel) 30(3)
  • Page 55 (7) Drain up kit (a) Part No. : RDU12E (b) Accessories Name Qty. Drain pump Drain hose Hose clamp Tapping screw (c) Installation of drain up kit Unit: mm Indoor unit Control VIEW A Fitting for drain hose Vinyl chloride pipe VP-25 (d) Installation of drain up kit 4 Tapping screw Fix the drain up kit on the right side of the...
  • Page 56 Use hard PVC general purpose pipes VP-25 sold on the market 3 Hose clamp for drain pipes after draining up. Tighten the PVC pipe securely with the attached clamp after inserting it in the drain socket. Drain hose The drain pipe must have downward inclination gradient of 1/ 100 or more, and take care not to make a trap or uphill pass.

  • Page 57: Maintenance Data

    3.6 MAINTENANCE DATA 3.6.1 Trouble shooting (1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it is necessary to understand the function controlled by a micro computer thoroughly, so as not to mistakenly identify correct operations as mis-operations.
  • Page 58 (2) Indication of self diagnosis Indoor unit indicator Outdoor unit indicator Description Cause Conditions of flashing of trouble (LED5) RUN lamp TIMER lamp When heat exchanger thermistor temperature ● Broken heat exchanger Indoor heat of –20 °C or under continued for more than 1 time flash thermistor wire Comes on...
  • Page 59 (3) Inspection procedures corresponding to detail of trouble [Broken thermistor wire, Thermistor error connector poor connection] Correct connection. Is connector connection good? Is thermistor resistance value good? Replace thermistor. Replace PCB. Discharge pipe thermistor temperature characteristics Thermistor temperature characteristics (Room temp., indoor and outdoor unit Temperature (˚C) Resistance (kΩ) Temperature (˚C)
  • Page 60 [Broken power transistor, Outdoor unit e rror broken compressor wire] Is output voltage applied to all 3 Defective inverter phases of power transistor? Is compressor wiring connected Connect securely. securely? Inspect compressor. (Broken coil wire) [Overload operation, compressor Over current lock, overcharge] Discharge refrigerant.
  • Page 61 [Indoor/outdoor printed circuit board defect Serial signal transmission abnormality Outdoor power source abnormality] Does the voltage between 2 and 3 Are receiving lamps (LEDs 1 to 4) on? The indoor printed circuit board is defective. on the indoor side oscillate between (Flashing) 0 and 12V? Does the voltage between 2 and 3...
  • Page 62 (5) How to make sure of remote controller Is remote Remote controller Note (1) How to check the remote controllre controller defects normal? (a) Press the reset switch of the remote controller. (b) If all LCD are displayed after zero (0) display, it is basically normal.
  • Page 63 (7) Inverter failure diagnosis If the results of the diagnosis in Item (3) indicate that the inverter is defective, perform the following inspection on the inverter. (a) Diagnosis procedure : http://splitoff.ru/tehn-doc.html...
  • Page 64 : http://splitoff.ru/tehn-doc.html...

  • Page 65: Trouble Shooting

    3.6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities..noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging.

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