Mitsubishi Heavy Industries SCM60ZF-S Technical Manual
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Mitsubishi Heavy Industries SCM60ZF-S Technical Manual

Mitsubishi Heavy Industries SCM60ZF-S Technical Manual

Inverter multi-split system room air-conditioner
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Manual No. '06 • SCM - T - 052
INVERTER MULTI-SPLIT SYSTEM
ROOM AIR-CONDITIONER
(Air to air heat pump type)

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Summary of Contents for Mitsubishi Heavy Industries SCM60ZF-S

  • Page 1 Manual No. '06 • SCM - T - 052 INVERTER MULTI-SPLIT SYSTEM ROOM AIR-CONDITIONER (Air to air heat pump type)

  • Page 2: Table Of Contents

    CONTENTS 1 GENERAL INFORMATION ................1 1.1 Specific features ..................1 1.2 How to read the model name ..............1 2 SELECTION DATA .................... 2 2.1 Specifications ..................... 2 2.2 Range of usage & limitations ..............25 2.3 Exterior dimensions ................. 26 2.4 Piping system ...................

  • Page 3: General Information

    GENERAL INFORMATION 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 type · 30m, 45 type · 20m, 48 type · 40m, 60 type · 30m, 80 type · 40m ¡...

  • Page 4: Selection Data

    SELECTION DATA 2.1 Specifications (1) Indoor unit Models SKM20ZF-S, 22ZF-S, 25ZF-S Models SKM20ZF-S SKM22ZF-S SKM25ZF-S Item Cooling capacity 2000 2200 2500 Heating capacity 3000 3200 3400 Sound level Hi : 37 Me : 30 Lo : 23 Cooling Power level Hi : 53 Noise level Sound level...
  • Page 5 Models SKM28ZF-S, 35ZF-S, 50ZF-S, Model SKM28ZF-S SKM35ZF-S SKM50ZF-S Item Cooling capacity 2800 3500 5000 Heating capacity 4000 4500 5800 Sound level Hi : 38 Me : 31 Lo : 24 Hi : 39 Me : 32 Lo : 25 Hi : 47 Me : 36 Lo : 23 Cooling...
  • Page 6 Models STM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S Models STM25ZF-S STM35ZF-S STM50ZF-S STM60ZF-S Item Cooling capacity 2500 3500 5000 6000 Heating capacity 3400 4500 5800 6800 Sound level Cooling Power level Noise level Sound level Heating Power level 248 × 570 × 570 Main unit Exterior dimensions Height ×...
  • Page 7 Models SRRM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S Models SRRM25ZF-S SRRM35ZF-S SRRM50ZF-S SRRM60ZF-S Item Cooling capacity 2500 3500 5000 6000 Heating capacity 3400 4500 5800 6800 Sound level Cooling Power level Noise level Sound level Heating Power level Exterior dimensions 230 × 740 × 455 Height ×...
  • Page 8 (2) Outdoor unit Models SCM40ZF-S, 45ZF-S Models SCM40ZF-S SCM45ZF-S Item Cooling capacity 4000 (1900 ~ 4900) 4500 (700 ~ 5600) Heating capacity 5000 (1300 ~ 5200) 5600 (700 ~ 6800) Power source 1 Phase 220/230/240V 50Hz Cooling 970 (470 ~ 1470) 1390 (200 ~ 2160) Power consumption Heating...
  • Page 9 6°C ISO-T1, JIS C9612 (2) The values for capacity and power consumption shown in a range ( ) indicate the minimum and maximum of the range. (3) If the piping length exceeds 30 m, additional charging is required. (20g/m, SCM60ZF-S)
  • Page 10 Model SCM80ZF-S Model SCM80ZF-S Item Cooling capacity 8000 (1000~9300) Heating capacity 9300 (950~9500) Power source 1 Phase 220/230/240V 50Hz Cooling 2380 (280~3200) Power consumption Heating 2430 (250~3500) Cooling 10.9/10.5/10.0 Running current Heating 11.2/10.7/10.2 Sound level Cooling : 51 Heating : 52 Noise level Power level Cooling : 65...
  • Page 11 (3) Operation data ¡ The combinations of the indoor units is indicated by numbers. They are read as follows. (Example) SKM22ZF-S / 22 SKM35ZF-S / 35 ¡ 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 12 Model SCM45ZF-S (a) Heating Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room Min. Standard Max. – 1050 1350 – 1120 1380 –...
  • Page 13 Model SCM48ZF-S (a) Heating Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room Min. Standard Max. – – 0.78 1040 1340...
  • Page 14 Model SCM48ZF-S (b) Cooling Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room Min. Standard Max. – – –...
  • Page 15 Model SCM60ZF-S (a) Heating Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room Min. Standard Max. – –...
  • Page 16 Model SCM60ZF-S (a) Heating Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room Min. Standard Max. 22+22+35 1.95 1.95...
  • Page 17 Model SCM60ZF-S (b) Cooling Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room Min. Standard Max. – –...
  • Page 18 Model SCM60ZF-S (b) Cooling Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination 220V 230V 240V Min. Max. Standard A room B room C room Min. Standard Max. 22+22+35 1.50 1.50...
  • Page 19 Model SCM80ZF-S (a) Heating Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room D room Min. Standard Max. –...
  • Page 20 Model SCM80ZF-S (a) Heating Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room D room Min. Standard Max. 22+22+22 2.67 2.67...
  • Page 21 Model SCM80ZF-S (a) Heating Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room D room Min. Standard Max. 20+20+25+35 1.83 1.83...
  • Page 22 Model SCM80ZF-S (a) Heating Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room D room Min. Standard Max. 22+25+25+25 2.08 2.36...
  • Page 23 Model SCM80ZF-S (b) Cooling Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room D room Min. Standard Max. –...
  • Page 24 Model SCM80ZF-S (b) Cooling Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room D room Min. Standard Max. 22+22+22 2.16 2.16...
  • Page 25 Model SCM80ZF-S (b) Cooling Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room D room Min. Standard Max. 20+20+25+35 1.57 1.57...
  • Page 26 Model SCM80ZF-S (b) Cooling Cooling capacity (kW) Power consumption (W) Standard current (A) Indoor unit Room cooling capacity (kW) Total capacity (kW) combination Min. Max. 220V 230V 240V Standard A room B room C room D room Min. Standard Max. 22+25+25+25 1.78 2.03...
  • Page 27 2.2 Range of usage & limitations Models SCM40ZF-S SCM45ZF-S SCM48ZF-S SCM60ZF-S SCM80ZF-S Item Cooling 18 to 32°C 21 to 32°C 18 to 32°C 21 to 32°C 18 to 32°C Indoor intake air temperature (Upper, lower limits) Heating 15 to 30°C Cooling -15 to 43°C...

  • Page 28: Exterior Dimensions

    2.3 Exterior dimensions (1) Indoor unit Models SKM20ZF-S, 22ZF-S, 25ZF-S, 28ZF-S, 35ZF-S, 50ZF-S Unit : mm Piping hole right(left) 117.5 117.5 Terminal block 216.5 216.5 148.5 148.5 216.5 216.5 Remote control 14.5 67.5 53.5 Piping for Gas 20,22,25,28,35: ø9.52 397.1 ø12.7 Piping for Liquid 465.1 (ø6.35)
  • Page 29 Models SRRM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S 670 (Suspension bolts pitch) Controller Hanging bolt (M8 × 4) Mark Description Model 25,35ZF-S 50,60ZF-S Gas pipe connecting port ø9.52(Flare) ø12.7(Flare) B Liquid pipe connecting port ø6.35(Flare) Terminal block ø 4 × 8(Holes for tapping screws) Air outlet Air inlet Drain hose...
  • Page 30 Model SCM80ZF-S Drain holes Unit : mm Liquid line service valve Liquid line service valve valve C unit (ø6.35) valve D unit (ø6.35) Gas line service valve Gas line service valve valve D unit (ø9.52) valve C unit (ø9.52) Liquid line service valve Liquid line service valve valve B unit (ø6.35) valve A unit (ø6.35)

  • Page 31: Piping System

    2.4 Piping system Model SCM40ZF-S...
  • Page 32 Models SCM45ZF-S...
  • Page 33 Models SCM48ZF-S...
  • Page 34 Model SCM60ZF-S...
  • Page 35 Model SCM80ZF-S...

  • Page 36: Selection Chart

    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 SCM40ZF-S, 48ZF-S, 80ZF-S, Cooling...
  • Page 37 SCM45ZF-S, 60ZF-S Cooling Heating Applicable range Indoor air W.B. temperature °C W.B. ISO-T1 Standard Condition Outdoor air W.B. temperature °C W.B. ISO-T1 Standard Condition (2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping It is necessary to correct the cooling and heating capacity in relation to the one way piping length between the indoor and outdoor units.

  • Page 38: Electrical Data

    ELECTRICAL DATA Meaning of marks • Outdoor Unit Symbol Parts name Symbol Parts name Compressor motor EEVA ~ D Electronic expansion valve Fan motor 4 way valve (coil) Capacitor (for FM Tho-A Sensor (outdoor air temp.) Reactor Tho-R Sensor (outdoor H.X temp.) Diode stack Tho-D Sensor (discharge pipe temp.)
  • Page 39 Model SKM50ZF-S Y/GN Power line (Outdoor unit) HEAT EXCHANGER Color symbol Black Blue Brown White Yellow Yellow/Green (250V 3.15A) Printed circuit board Back up switch Display Wireless R-Amp...
  • Page 40 Models STM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S Control Printed circuit board (250V 3.15A) Z X Y Z Color symbol Black Blue Power line Wired remote control (Outdoor unit) (Optional parts) -A Th Yellow White Yellow/Green Models SRRM25ZF-S, 35ZF-S, 50ZF-S, 60ZF-S Control (Optional parts) (Optional parts) Printed circuit...
  • Page 41 (2) Outdoor unit Models SCM40ZF-S, 45ZF-S...
  • Page 42 Model SCM48ZF-S...
  • Page 43 Model SCM60ZF-S...
  • Page 44 Model SCM80ZF-S...

  • Page 45: Outline Of Operation Control By Microcomputer

    OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch (1) Wireless remote control Models All models S Operation section FAN SPEED button OPERATION MODE select button Each time the button is pushed, the indi- Each time the button is pushed, the indi- cator is switched over in turn.
  • Page 46 (2) Wired remote control (Optional parts)..STM, SRRM only The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation. Characters displayed with dots in the liquid crystal display area are abbreviated.
  • Page 47 (3) Unit indication section Models SKM20ZF-S, 22ZF-S, 25ZF-S, 28ZF-S, 35ZF-S, 50ZF-S RUN (HOT KEEP) light (green) • Illuminates during operation. • Blinks at air flow stop due to the ‘HOT KEEP’. TIMER light (yellow) Illuminates during TIMER operation. HI POWER light (green) Illuminates during HIGH POWER operation.
  • Page 48 4.2 Unit ON/OFF button When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the unit on and off. (1) Operation Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off. (2) Details of operation The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by sensor), whether to go into the cooling, thermal dry or heating modes.

  • Page 49: Power Blackout Auto Restart Function

    4.4 Power blackout auto restart function (1) Power blackout auto restart function is that records the operational status of the air-conditioner immediately prior to it being switched off by a power cut, and then automatically resumes operations at that point after the power has been restored. (2) The following settings will be cancelled: (a) Timer settings (b) High-power operations...

  • Page 50: Comfortable Timer Setting

    (Max. 60 minutes) 4.7 Cooling operation (1) Summary (a) Capacity control Model SCM40ZF-S SCM45ZF-S SCM48ZF-S SCM60ZF-S SCM80ZF-S Capacity 1.9 ~ 4.9 kW 0.7 ~ 5.6 kW 1.1 ~ 6.7 kW 1.4 ~ 6.9 kW 1.0 ~ 9.3 kW Capacity control is within the range shown above.
  • Page 51 12 ~ 27 12 ~ 42 Hi power Econo 12 ~ 40 12 ~ 70 Note (1) Values in ( ) are for type SRRM. (c) SCM60ZF-S ◆SKM model (rps) Model (Indoor) Operation Mode Automatic 7 ~ 27 7 ~ 28...
  • Page 52 ◆STM, SRRM models (rps) Model (Indoor) Operation Mode Automatic 5 ~ 25 5 ~ 46 (5~ 42) 7 ~ 59 7 ~ 64 High 5 ~ 25 5 ~ 46 (5~ 42) 7 ~ 59 7 ~ 64 Medium 5 ~ 18 5 ~ 32 7 ~ 42 7 ~ 47...

  • Page 53: Heating Operation

    4.8 Heating operation (1) Summary (a) Capacity control Model SCM40ZF-S SCM45ZF-S SCM48ZF-S SCM60ZF-S SCM80ZF-S Capacity 1.3 ~ 5.2 kW 0.7 ~ 6.8 kW 0.78 ~ 7.1 kW 0.75 ~ 7.2 kW 0.95 ~ 9.5 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 54 12 ~ 63 12 ~ 78 12 ~ 37 12 ~ 45 Hi power Econo 12 ~ 63 12 ~ 78 (c) SCM60ZF-S ◆SKM model (rps) Model (Indoor) Operation Mode Automatic 7 ~ 46 7 ~ 47 7 ~ 47...
  • Page 55 (3) Operation of major functional components in heating mode Operation Thermostat OFF Thermostat OFF Fan, stop, abnormal stop Failure Functional Cooling (All indoor units) (Some of indoor units) (Some of indoor units) (Outdoor unit) components Command speed See preceding table (All indoor units) (Thermostat off units) (Fan, stop, abnormal stop units)
  • Page 56 3) Operation of function component in defrosting 100 sec. 120 sec. R1rps Decision rps R2rps After compressor software has started Decision rps Outdoor unit speed 0rps Notes (1) Indoor unit fan is in response to Hot Keep. Outdoor unit fan According to rps 4-way valve 470 pulse...

  • Page 57: Outline Of Automatic Operation

    ◆SCM60ZF-S Outdoor unit speed Outdoor unit fan R1 (rps) R2 (rps) 1-room 2-room 3-room 1-room 2-room 3-room 6th speed X1 pluse X2 pluse 1-room 2-room 3-room 1-room 2-room 3-room Operating unit ◆SCM80ZF-S Outdoor unit speed Outdoor unit fan R1 (rps)
  • Page 58 4.10 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 59 4.12 Operation permission/prohibition control (STM, SRRM only) The air conditioner operation is controlled by releasing the jumper wire (J3) on the indoor control board and inputting the external signal into the CnT. (1) The operation mode is switched over between Permission and Prohibition by releasing the jumper wire (J3) on the indoor control board.
  • Page 60 4.13 Control and protection functions (1) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) <I> (a) Operating condition After the indoor command speed is other than 0 rps for 9 minutes, when the indoor heat exchanger (Th ) is 2°C or lower for 1minute continuously.
  • Page 61 (3) Dew condensation prevention control for the cooling and dehumidifying operation (STM, SRRM type only) <I> (a) Operation condition: During cooling or dehumidifying operation, 20 minutes elapsed after starting (with indoor command speed something other than 0 rps), under the following conditions. 1) When the fan speed is set to “AUTO”...
  • Page 62 (5) Freezing cycle system protective control (a) Operating conditions: When both of following conditions have continued for more than 5 minutes later than 5 minutes after the start of operation. 1) Indoor command speed is higher than 0 rps 2) During cooling, dehumidifying: Indoor heat exchanger temperature - Room temperature > –4°C (b) Detail of operation 1) Indoor unit The command speed is forced to operate at 16 rps.
  • Page 63 (9) Cooling low load protection control (SCM45ZF-S, SCM60ZF-S only) (a) Operating condition: During cooling operation , when the outdoor air temperature (Th -A) is 22°C or lower for 3 minutes continuously. (b) Detail of operation: Taking the lower limit of decision speed range at 22 rps (60 type: 20 rps).
  • Page 64 A°C or more for 30 continuous seconds, current safe control is performed. Operation is restored when the outdoor temperature is B°C or less. • Values of A, B Model SCM40ZF-S SCM45ZF-S SCM48ZF-S SCM60ZF-S SCM80ZF-S 13 °C 12 °C 14 °C 14 °C 14 °C 12 °C...
  • Page 65 (16) Compressor overheat protection The detection temperature of the discharge pipe sensor (Tho-D) is used to prevent oil deterioration and damage to the motor wire due to overheating of the compressor. (a) If Tho-D becomes > = 110 °C, the compressor is stopped. After the stop mode has been activated, the compressor will be restarted when Tho-D becomes <...
  • Page 66 Notes (1) Tho-D(X): After compressor operation, the discharge pipe sensor temperature after X minutes. (2) Tho-A(X): After compressor operation, the outdoor air sensor temperature after X minutes. • Values of A ~ E Model SCM40ZF-S SCM45ZF-S SCM48ZF-S SCM60ZF-S SCM80ZF-S 8 °C 10 °C 8 °C 8 °C 8 °C 5 °C...
  • Page 67 5th speed 6th speed (b) If the outdoor unit’s fan speed drops, the outdoor fan is run for 1 minute at that speed. ◆SCM60ZF-S (a) The fan operates as follows according to the decision speed. (Except during defrost.) Cooling Heating...

  • Page 68: Application Data

    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 69: Installation Of Indoor Unit

    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 70 3) Mounting of interconnecting wires (Field wiring) a) Remove the lid. b) Remove the terminal block cover. c) Connect the connection wire securely to the terminal block. Use cables for interconnection wiring to avoid loosening of the wires. Terminal block CENELEC code for cables Required field cables.
  • Page 71 Drainage ¡ The drain hose must be fit with a downward slope. ¡ Do not set the drain hose like the following illustrations. under 5 cm Smell from sewerage drains. Too high It curves like a wave. The end of the The gap to the The end of the drain hose is...
  • Page 72 (b) Installation of indoor unit Installation dimensions Ceiling opening 660 (For conventional ceiling) Unit: mm Hanging bolt pitch 530 ANEL Control box Air intake Air outlet Drain hose(accessory) To be installed at site Inspection port (For conventional ceiling) Mark Description Model 25, 35ZF-S 50, 60ZF-S...
  • Page 73 1) Connect the connection wire securely to the terminal block. If the wire is not affixed completely, contact will be poor, and it is dangerous as the terminal block may heat up and catch fire. 2) Take care not to confuse the terminal numbers for indoor and outdoor connections. 3) Affix the connection wire using the wiring clamp.
  • Page 74 B. When embedded into ceiling 1. Determine the positions of hanging bolts (530 × 530). The pitch center of a hanging bolt must accord with the center of the unit. 2. Use four hanging bolts, each fastened in such a manner that it can withstand pull force of 50kgf. 3.
  • Page 75 C. Attaching the panel Hook 1 piece For fixing temporarily <Accessory items> Chain 2 pieces (It is attached to the panel.) Bolt 4 pieces For hoisting the panel Screw 1 piece For attaching a hook Screw 2 pieces For attaching a chain a) Make sure that the unit main body is positioned at the correct height and the opening on the ceiling is made to the correct dimensions with the level gauge supplied with the main body.
  • Page 76 k) Attach two chains to the intake grille with two screws. [ Figure 7] l) Replace the corner panels. Please also close a chain with a screw together then. m) Close the intake grille. Chain Chain [Figure 7] (3) Ducted type (SRRM) (a) Caution for installation Install the unit with the customer's consent at location that meets the following conditions.
  • Page 77 3) Preparations for the Main Frame Mounting of interconnecting wires (Field wiring) a) Remove the control lid. b) Connect the connection wire securely to the terminal block. Control lid Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables Required field cables.

  • Page 78: Installation Of Remote Control

    6) Installing the Main Unit 7) Securing the Wireless Receiver • Attach the washers and nuts to the ceiling hanging bolts. • Attach the hanging tool to the above nuts, and tighten the nuts. Flat head M8 hanging bolt machine screw M8 nut Wireless receiver Installation frame...

  • Page 79: Installation Of Outdoor Unit

    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. 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 80: Electrical Wiring

    5.4 Electrical wiring unit A unit B unit C unit D Outdoor unit Circuit Earth breaker leakage breaker Indoor unit unit A unit B unit C unit D (1) Connection of the power lines This multi-type room air conditioner receives its power from outside. It is necessary to use a single phase 220/230/240 V 50 Hz for the power supply.

  • Page 81: Refrigerant Piping

    The maximum permissible length of the refrigerant pipes for the outdoor units, and the maximum permissible height difference for the outdoor units are as shown below. SCM40ZF-S SCM45ZF-S SCM48ZF-S SCM60ZF-S SCM80ZF-S Length for one indoor unit under 25m Total length for all rooms...
  • Page 82 30m (1800g) SCM45ZF-S 20m (1600g) 30m (2200g) 20g/m 40m (2400g) SCM60ZF-S 40m (3150g) 20g/m 70m (3750g) SCM80ZF-S *1: Charge amount at the time of shipment. Ensure that there are no gas leaks from the pipe joints by using a leak detector or soap water.

  • Page 83: Test Run And Handling Instruction

    (5) Heat insulation for joint Heat insulation for joints SKM, SRRM models STM model Cover the joint with After checking each flare joint of the Band(accessory) Pipe cover (accessory) insulation material Position so Vinyl tape indoor unit for gas leaks, cover it with the for the indoor unit the slit attached insulating material and firmly...
  • Page 84 Beware of wrong connections in refrigerant piping and wiring ● Make sure to match the piping and wiring from each unit to the outdoor unit. ● Be careful because if connections are wrong, normal operation cannot be achieved and may damage the compressor. [Correct connections] [Example of wrong connections] Piping...
  • Page 85 (2) Installation of wired remote control (Optional parts) 2) Recessed fitting (a) Selection of installation location a) The Electrical box and remote control (shield wire Avoid the following locations must be use in case of extension) are first embedded. 1) Direct sunlight. 2) Close to heating device.
  • Page 86 (3) Setting functions using the wired remote control The default settings of this unit's functions are as follows: If you want to charge a setting, follow the procedure found in the installation manual and set to your desired setting. For the method of setting, please refer to the installation manual of a remote control unit. 1 Remote control unit functions ( 2 Indoor unit functions (I/U FUNCTION FUNCTION...
  • Page 87 (b) Function setting method perating guide message 1) Stop the air conditioner Function description: B , Settting: C Function number: A 2) Press the SET and MODE buttons simultaneously for 3 seconds or longer. The screen display will be switched as follows: Confirm Button “...
  • Page 88 When “I/U FUNCTION ” is selected. 1 The screen display will be switched as follows: “ I/U SELECT” “ SET” “I/U No.00” (blinking) I/U No.00 2 Press either button. Select the indoor unit number that you want to change settings. If only one indoor unit is connected, the indoor unit number will not charge, so please proceed to Step 3.
  • Page 89 (d) Changing the remote control’s temperature setting range 1) The temperature setting range of the remote control can be changed. Through remote control button operations, the upper limit and lower limit set temperature values can be changed indi- vidually. During heating operation, the changed upper limit value becomes valid and at times other than during heating operation, (during cooling, dehumidification, auto and fan operation), the changed lower limit value becomes valid.
  • Page 90 (4) SUPER LINK ADAPTER (SC-AD-E) (a) Functions Transmits the settings from the Super link option to the indoor units. Returns the priority indoor unit data in response to a data request from the Super link option. Inspects the error status of connected indoor units and transmits the inspection codes to the Super link option. A maximum of 16 units can be controlled (if in the same operation mode).

  • Page 91: Installation Of Optional Parts (Ducted Type)

    5.8 Installation of optional parts (Ducted type) Table of optional parts Bottom air inlet grille set Rear inlet filter set Duct joint for air outlet plate Drain up kit RTS12 RBF12 RFJ22 RDU12E (1) Bottom air inlet grille set (a) Part No.: RTS12 (b) Parts list Name Qty.
  • Page 92 Pan-head screw (2) Rear inlet filter set (a) Part No.: RBF12 Indoor unit Filter set Bracket for filter fixing (b) Installation Hanger metal Do not use this filter set alone. There are two inlet ports: lower inlet port (normal) and rear inlet port. 1) Detach the rear panel and the hanger metal screwad onto the rear Tappping screw panel from an indoor unit.
  • Page 93 ◆ Air flow and external static pressure characteristics (Heating: Hi) Heating <Hi> Heating <Hi> SRRM25ZE-S SRRM35ZE-S Cooling <Hi> Cooling <Hi> Air flow (m /min) Air flow (m /min) Heating <Hi> Heating <Hi> SRRM50ZE-S SRRM60ZE-S Cooling <Hi> Cooling <Hi> Air flow (m /min) Air flow (m /min)
  • Page 94 (4) 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 4 Tapping screw (d) Installation of drain up kit Fix the drain up kit on the right side of the...
  • Page 95 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 96: Maintenance Data

    MAINTENANCE DATA 6.1 Trouble shooting (1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models] 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 opera- tions as mis-operations.
  • Page 97 (2) Indication of self diagnosis Indoor unit Outdoor unit Wired remote indicator Description of indicator control display Cause Conditions of flashing trouble TIMER (LED 5) (optional parts) light light • Broken heat exchanger sensor (1) When heat exchanger sensor (1) temperature of Indoor heat exchanger 1 time Comes...
  • Page 98 (3) Inspection procedures corresponding to detail of trouble [Broken sensor wire, Sensor error connector poor connection] Is connector connection good? Correct connection. Is sensor resistance value good? Replace sensor. Replace PCB. ◆ Sensor temperature characteristics ◆ Discharge pipe sensor temperature characteristics (Room temp., indoor unit heat exchanger Temperature (˚C) Resistance (kΩ)

  • Page 99: Current Cut

    [Open phase on compressor output Current cut terminal, compressor lock] Does current cut operate when operating inverter with compressor Defective inverter wire disconnected? Is output voltage applied to all 3 Defective inverter phases of power transistor? Secure space for suction Is there any shortcircuit? and blow out.

  • Page 100: Over Heat Of Compressor

    [Gas shortage, defective discharge Over heat of compressor pipe sensor] Connector connection check, resistance Is discharge pipe sensor resistance value good? value check, replacement of discharge pipe sensor (page 96) Check if there are any Does trouble persist after Is sufficient quantity of refrigerant places where gas is leaking.
  • Page 101 [Defective fan motor, connector Outdoor fan motor error poor connection, defective PCB] Is connector connection good? Correct connector connection Is DC fan motor resistance value good? * Disconnect the fan motor connector, then investigate the DC fan motor and out- door unit circuit board sepa- Replace outdoor fan motor rately.
  • Page 102 (b) Outdoor unit Phenomenon Operation Sensor mode Shortcircuit Broken wire Cooling System can be operated normally. System can be operated normally. Heat exchanger sensor Heating Defrosting is not performed. Defrosting is performed for 10 minutes at approx. 45 minutes. Cooling System can be operated normally.
  • Page 103 (6) How to make sure of remote control Is remote Remote control control normal? defects Note (1) Check method of remote control Press the reset switch of the remote control. If all LCD are displayed after zero (1) display, it is ba- Again pushing sically normal.
  • Page 104 (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 Fuse is defective Is the fuse good? e Replace Varistor is defective Is the varistor good? e Replace Noise filter is defective...
  • Page 109 ◆ Power transistor inspection procedure [Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)] If there is a self-diagnosis display, inspect the compressor system (burns, wiring mistakes, etc.). If no problems are found, check the output of the power transistor.

  • Page 110: Servicing

    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 R410A is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging.

  • Page 111: Refrigerant Piping Installation/Servicing Manual For Air Conditioners Using R410A

    REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL FOR AIR CONDITIONERS USING R410A (These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association) 7.1 Outline 7.1.1 Refrigerant R410A (1) Adoption of R410A in air conditioners In 1974, it was pointed out that the ozone layer in the upper stratosphere (about 20 ~ 40 km above ground) might have been damaged by the ozone depleting substances such as CFC (chlorofluorocarbon) and HCFC (hydrochlorofluorocarbon).

  • Page 112: Refrigerant Piping Installation

    (3) Lubricating oils for R410A As the lubricating oils for R22, mineral oils, alkylbenze synthetic oils, etc. have so far been used. As R410A features less solubility with these conventional lubricating oils such as mineral oils, the lubricating oils tend to stay within the refrigeration cycle. As the lubricating oils highly soluble with R410A, ester, ethereal and other synthetic oils are available.
  • Page 113 (2) Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used.
  • Page 114 d) Flare processing øD Make certain that a clamp bar and copper pipe have been cleaned. By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conventional flare tool. Flare processing dimensions differ according to the type of flare tool. Be careful. When using a conventional flare tool, be sure to secure “dimension A”...

  • Page 115: Storage Of Piping Materials

    Table 8. Flare and flare nut dimensions for R22 [unit: mm] Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.2 16.0 12.9 15.88 19.4 19.0 16.0 (2) Flare connecting procedures and precautions a) Make sure that the flare and union portions do not have any scar or dust, etc.
  • Page 116 (2) Identification a) Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 (see on page 110), and, as shown in Tables 5 and 6 (see on page 112), it also differs from R22 in flare processing and flare nut dimensions. So, it is necessary to choose a piping set suitable for R410A.
  • Page 117 (3) Flux a) Reasons for the use of flux • By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler. • In the brazing process, it prevents the metal surface from being oxidized. •...

  • Page 118: Installation, Removal And Servicing

    Reducing valve Flow meter Stop valve From the nitrogen cylinder Piping Nitrogen gas Rubber plug for sealing Fig.5 Prevention of oxidation during brazing * Cautions during brazing 1 General cautions 1) The brazing strength should be high as required. 2) After operation, airtightness should be kept under a pressurized condition. 3) During brazing do not allow component materials to become damaged due to overheating.
  • Page 119 (1) Tools exclusive for R410A a) Gauge manifold • As R410A is characterized by high pressure, conventional tools cannot be used. Table 11. Differences between conventional high/low pressure gauges and those for R410A Conventional gauges Gauges exclusive for R410A High pressure -0.1~3.5MPa -0.1~5.3MPa gauge (red)
  • Page 120 e) Flare tool (clutch type) • A flare tool for R410A is provided with a large clamp bar receiving hole so that the projection of the copper pipe from the clamp bar can be set at 0~0.5 mm in flare processing, and also features higher spring strength for increased expansion pipe torque.
  • Page 121 7.3.2 New installation work (when using new refrigerant piping) (1) Air purge by vacuum pump and gas leakage inspection (see Fig. 6) a) Connect the charge hose to the outdoor unit. 1 b) Connect the charge hose to the vacuum pump adapter. 2 At this time, keep the control valves in the fully closed position.
  • Page 122 f) After charging liquid refrigerant into the air conditioner by closing the charging valve, stop operation by fully closing the gauge manifold’s valve Lo. 2 5 g) Quickly remove the charge hose from the service port. 6 When stopped halfway, refrigerant being cycled will be released. h) After securing the caps on the service port and control valve, check the caps’...

  • Page 123: Refrigerant Recovery

    7.3.6 Refrigerant recharging at servicing When it becomes necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. (For details, see the instruction manual prepared by the equipment manufacturer) 1) Connect the charge hose to the outdoor unit’s service port. 2) Connect the charge hose to the vacuum pump adapter.
  • Page 124 (4) Recovering procedures a) According to the instructions for handling the refrigerant recovering equipment (described in the attached instruction manual), operate the equipment to recover refrigerant. b) During the operation, take care of the following cautions. 1 Ascertain that the refrigerant recovering equipment is running as required and always monitor the state of operation so that adequate steps can be taken in an emergency.
  • Page 125 b) Charge hose (pressure resistant hose for fluorocarbon) and packing • It is 1/4B in thickness and available in various lengths, etc. • Use a hose whose pressure resisting performance is higher than 5.2 MPa (52 kg/cm • Generally, a setting fixture is provided only on one end. (4) Gauge manifold Hose Setting...
  • Page 127 INVERTER MULTI-SPLIT SYSTEM ROOM AIR-CONDITIONER Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax: (03) 6716-5926...

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