Related Manuals for Mitsubishi SCM45ZA
Summary of Contents for Mitsubishi SCM45ZA
- Page 1 INVERTER MULTI-SPLIT SYSTEM ROOM AIR-CONDITIONER[2room] (Air to air heat pump type) (OUTDOOR UNIT) SCM45ZA (INDOOR UNIT) SKM22ZA SKM25ZA SKM28ZA SKM32ZA SKM40ZA...
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Page 2: Table Of Contents
CONTENTS 6.1 GENERAL INFORMATION ................ 193 6.1.1 Specific features ................. 193 6.1.2 How to read the model name ............. 193 6.2 SELECTION DATA ..................194 6.2.1 Specifications ..................194 6.2.2 Range of usage & limitations ............. 198 6.2.3 Exterior dimensions................199 6.2.4 Piping system .................. -
Page 3: General Information
GENERAL INFORMATION 6.1.1 Specific features (1) Equipped with an inverter scroll compressor. ¡Low noise. Low vibration and compact. (2) The long piping makes the location of the inside and units flexible. ¡No need for additional charge of refrigerant : 20 m ¡Maximum piping length : 30 m (3) Connectable indoor capacity Number of connectable units : 1 to 2 units... -
Page 4: Selection Data
Necessary (Both Liquid & Gas lines) Drain hose Connectable Accessories (including) Mounting kit Optional parts — Outdoor units to be combined SCM45ZA Notes (1) The data are measured at the following conditions. Item Indoor air temperature Outdoor air temperature Standards Operation Cooling 27ºC... - Page 5 (2) Outdoor unit Model SCM45ZA Model SCM45ZA Item Cooling capacity 4500 (2000 ~ 5100) Heating capacity 5600 (2200 ~ 6000) Power source 1 Phase 220/240V 50Hz Cooling 1820 (680 ~ 2050) Power consumption Heating 1950 (650 ~ 2190) Cooling 8.4/7.7...
- Page 6 (3) Operation data ¡ The combinations of the indoor units is indicated by numbers. They are read as follows. (Example) SKM22ZA / 22 SKM40ZA / 40 ¡ 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 7 (b) Cooling (220/240V) Running Cooling capacity (kW) Power consumption (W) current (A) Indoor unit combination Room cooling capacity (kW) Total capacity (kW) Min. Standard Max. Standard A room B room Min. Standard Max. 3.44/3.16 1040 4.13/3.79 1040 1150 4.78/4.38 room 1200 1360 5.51/5.05...
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Page 8: Range Of Usage & Limitations
6.2.2 Range of usage & limitations Model SCM45ZA 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 1 to 2 units that can be... -
Page 9: Exterior Dimensions
6.2.3 Exterior dimensions (1) Indoor unit Unit: mm Models SKM22ZA, 25ZA 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 10 6.35) 440 Ø Drain hose 600 ( Ø Piping hole Piping hole Ø Ø VIEW A (2) Outdoor unit Model SCM45ZA Drain hole 411.5 Elongated hole Terminal block (2-16×12) 88.2 29.7 Liquid line service Gas line service valve B Unit valve B Unit (ø6.35)
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Page 11: Piping System
6.2.4 Piping system Model SCM45ZA Cooling cycle Outdoor unit Heating cycle Thermistor Service valve (Gas) Gas line (ø9.52) (ø9.52) Indoor unit 4 way valve Check joint Muffler Thermistor Discharge Heat exchanger Compressor Thermistor Accumulator Thermistor Thermistor Suction Strainer Electric Service valve... -
Page 12: Selection Chart
6.2.5 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 13: Electrical Data
ELECTRICAL DATA Meaning of marks • Outdoor Unit Symbol Parts name Symbol Parts name Compressor motor Tho-A Thermistor (outdoor air temp.) Fan motor Tho-R Thermistor (outdoor H.X temp.) Reactor Tho-D Thermistor (comp. dome temp.) Diode stack LED2 Warning lamp (Red) EEVA, B Electric expansion valve LED1, 3... - Page 14 (2) Outdoor unit Model SCM45ZA UNIT A Serial A Power transistor AC·R 52X2-4 UNIT B Serial B AC·S S. OUT – Fuse 250V 25A R. IN Power source 1 Phase S. IN 220/240V Y/GN LED1 LED3 LED2 50Hz (Green) (Red)
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Page 15: Outline Of Operation Control By Microcomputer
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 16 (3) Back-up switch When the remote controller become weak, or if the remote controller is lost or malfunctioning, this switch may be used to turn the unit on and off. (a) Operation Push the switch once to place the unit in the automatic mode. Push it once more to turn the unit off. (b) Detail of operation Operation starts in the same way as the previous operation.
- Page 17 (6) Cooling operation (a) Summary Capacity control Model SCM45ZA SCM45YA Capacity 2.0 ~ 5.1 kW 2.0 ~ 5.1 kW Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capac- ity of the outdoor unit, the demand capacity will be proportionally distributed.
- Page 18 (7) Heating Operation (a) Summary Capacity control Model SCM45ZA Capacity 2.2 ~ 6.0 kW Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capac- ity of the outdoor unit, the demand capacity will be proportionally distributed.
- Page 19 (d) Hot keep operation If the hot keep operation is selected during the heating operation, the indoor fan is controlled based on the temperature of the indoor unit heat exchanger (detected with Th -R, indoor unit heat exchanger thermistor) to prevent blowing of cool wind. ¡...
- Page 20 Operation of function component in defrosting 80 rps Notes (1) Indoor unit fan is Outdoor unit speed Decision speed Decision speed in response to Hot Keep. 0 rps Outdoor unit fan starts 6 seconds af- ter the start of the According to rps compressor.
- Page 21 (9) Control and protection functions (a) Start of protection for compressor When the decision speed becomes a speed other than 0 rps and when the compressor is starting operation, an inverter decision speed of 40 rps or less indicates four-way valve switching protection and a speed of 40 rps or more indicates that protection of the compressor has started.
- Page 22 (e) High pressure cut protection control The high pressure cut protection operates during heating operations when a “heating 0 rps” serial signal is received from one of the two operating indoor units. 1 When only one of two operating units sends a “heating 0 rps”signal. Functional components Operation of each functional components Remarks...
- Page 23 Low Hz continuous operation protection control The following controls are performed to return oil to the compressor when the outdoor unit speed of 28 rps or more to 40 rps or less is continuously operated for 20 minutes. The decision speed is forced to operate at 40 rps for 2 minutes. The outdoor fan and electronic expansion valve are operated according to the outdoor unit speed.
- Page 24 Compressor lock If the motor for the compressor does not turn a half a turn approximately 0.3 seconds after it has been started, it is determined that a compressor lock has occurred and the inverter is stopped. (m) Compressor dome thermistor broken wire protection control When the outdoor unit speed is other than 0 rps and after the compressor has started to operate, if after 10 minutes there is a compressor dome thermistor temperature10-second interrupt signal (less than 7 °C), it is immediately placed in stop mode and restarted.
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Page 25: 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 26: Installation Of Indoor Unit
6.5.1 Installation of indoor unit (a) Caution for installation The system should be applied to places as households, residences and the like. The equipment shall be installed in accordance with national wiring regulations. 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 27 Mounting of interconnecting wires (Field wiring) Remove the lid. Remove the terminal block cover. Connect the connection wire securely to the terminal block. Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables Required field cables. RNR4G1.5 (Example) H Harmonized cable type 05 300/500 volts...
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Page 28: Installation Of Remote Controller
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 29: Installation Of Outdoor Unit
6.5.3 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 30: Electrical Wiring
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. SCM45ZA SCM45YA Use cables for interconnection wiring to avoid loosening of the wires. -
Page 31: Refrigerant Piping
Gas side ø 9.52 · t 0.8 ø 12.7 · t 0.8 ¡ Outdoor unit and the total connectable indoor units (class kW): Model Total of indoor units (class kW) SCM45ZA 6.5kW SCM45YA 6.5kW (2) Connection of refrigerant piping ¡... - Page 32 Maximum total pipe length for all rooms (Amount of uncharged Model On site additional charge (Maximum amount of refrigerant) refrigerant) *1 SCM45ZA 1300g 20g/m 1500g SCM45YA *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.
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Page 33: Test Run And Handling Instruction
(5) Heat insulation for joint Heat insulation for joints Finish and fixing Cover the joint with Pipe clamp Apply exterior tape and shape along insulation material Position so Vinyl tape Pipes for the indoor unit the place where the pipes will be rout- the slit Crossover wires and tape it. -
Page 34: Maintenance Data
MAINTENANCE DATA 6.6.1 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 35 (2) Indication of self diagnosis Indoor unit indicator Outdoor unit Description of indicator Cause Conditions of flashing trouble (LED 2) RUN lamp TIMER lamp When heat exchanger thermistor temperature of • Broken heat exchanger thermistor –20 °C or under continued for more than 3 Indoor heat exchanger wire 1 time flash...
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Page 36: Thermistor Error
(3) Inspection procedures corresponding to detail of trouble [Broken thermistor wire, Thermistor error connector poor connection] Is connector connection good? Correct connection. Is thermistor resistance value good? Replace thermistor. Replace PCB. Comp. dome thermistor temperature characteristics Thermistor temperature characteristics (Room temp., indoor and outdoor unit heat Temperature (˚C) Resistance (kΩ) Temperature (˚C) - Page 37 [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 Current safe stop lock, overcharge] Discharge refrigerant.
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Page 38: Compressor Lock
[Defective fan motor, Outdoor fan motor error defective outdoor PCB] Correct connector Is connector connection good? connection. Is voltage applied to fan motor? Defective outdoor unit (DC) Defective fan motor [Indoor/outdoor printed circuit board defect Serial signal transmission abnormality Outdoor power source abnormality] Possible causes include interference This is due to a tempo- from the lighting, spontaneous load inter-... - Page 39 (4) Phenomenon observed after shortcircuit, wire breakage on thermistors. (a) Indoor unit Phenomenon Operation Thermistor mode Shortcircuit Broken wire Cooling Release of continuous compressor operation command Continuous compressor operation command is not released. Room temperature thermistor Heating Continuous compressor operation command is not released. Release of continuous compressor operation command Continuous compressor operation command is not released.
- Page 40 (6) Indoor electrical components inspection flowchart Is there voltage between terminal Inspect power source blocks 1 and 2 ? (AC 220/240 V) for outdoor unit. Is the fuse burnt out? (3.15 A) Replace fuse. Is there voltage between CNC (1) Replace the transformer.
- Page 41 (7) Outdoor unit inspection points CAUTION – HIGH VOLTAGE ¡Display lamp inspection • LED 2 (Abnormality display lamp - Red) ON or flashing: Protection function operating High voltage is produced in the control box. Don't touch • LED 1, 3 (Light display for each room - ON when there is a serial signal being electrical parts in the control box for 5 minutes after the unit is Green)
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Page 42: Trouble Shooting
6.6.2 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.