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Table of Contents
Related Manuals for Mitsubishi Heavy Industries SRK20HD-S
Summary of Contents for Mitsubishi Heavy Industries SRK20HD-S
- Page 1 Manual No. ’04 . SRK-T . 040 TECHNICAL MANUAL Collection data WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air to air heat pump type) SRK20HD-S, SRK28HD-S, SRK40HD-S (Split system, air cooled cooling only type) SRK20CD-S, SRK28CD-S, SRK40CD-S...
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Page 2: Table Of Contents
CONTENTS 1. GENERAL INFORMATION ................1 Specific features ..................1 How to read the model name ..............1 2. SELECTION DATA................... 2 Specifications ................... 2 Range of usage & limitations ..............8 Exterior dimensions ................. 8 Piping system ................... 10 Selection chart .................. -
Page 3: General Information
GENERAL INFORMATION 1.1 Specific features The “Mitsubishi Daiya” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with opera- tion control switch and the outdoor unit is composed of condensing unit with compressor. -
Page 4: Selection Data
SELECTION DATA 2.1 Specifications Model SRK20HD-S (Indoor unit) SRC20HD-S (Outdoor unit) Model SRK20HD-S SRC20HD-S Item Cooling capacity 2050 Heating capacity 2200 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 0.63 Running current (Cooling) 3.1/3.0/2.9 Heating input Running current (Heating) 3.0/2.9/2.8 Inrush current 18.9... - Page 5 Model SRK28HD-S (Indoor unit) SRC28HD-S (Outdoor unit) Model SRK28HD-S SRC28HD-S Item Cooling capacity 2550 Heating capacity 2800 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 0.79 Running current (Cooling) 3.9/3.7/3.5 Heating input 0.77 Running current (Heating) 3.7/3.5/3.3 Inrush current 17.2 Cooling: 3.21 Heating: 3.61 sound level Hi 39, Me 33, Lo 30...
- Page 6 Model SRK40HD-S (Indoor unit) SRC40HD-S (Outdoor unit) Model SRK40HD-S SRC40HD-S Item Cooling capacity 3600 Heating capacity 4000 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 1.12 Running current (Cooling) 5.3/5.1/4.9 Heating input 1.16 Running current (Heating) 5.5/5.3/5.1 Inrush current 25.2 Cooling: 3.21 Heating: 3.42 sound level Hi 40, Me 38, Lo 34...
- Page 7 Model SRK20CD-S (Indoor unit) SRC20CD-S (Outdoor unit) Model SRK20CD-S SRC20CD-S Item Cooling capacity 2050 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 0.63 Running current (Cooling) 3.1/3.0/2.9 Inrush current 18.9 Cooling: 3.21 sound level Hi 34, Me 28, Lo 26 Cooling Noise level Power level...
- Page 8 Model SRK28CD-S (Indoor unit) SRC28CD-S (Outdoor unit) Model SRK28CD-S SRC28CD-S Item Cooling capacity 2550 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 0.79 Running current (Cooling) 3.9/3.7/3.5 Inrush current 17.2 Cooling: 3.21 sound level Hi 39, Me 33, Lo 30 Cooling Noise level Power level...
- Page 9 Model SRK40CD-S (Indoor unit) SRC40CD-S (Outdoor unit) Model SRK40CD-S SRC40CD-S Item Cooling capacity 3600 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 1.12 Running current (Cooling) 5.3/5.1/4.9 Inrush current 25.2 Cooling: 3.21 sound level Hi 40, Me 38, Lo 34 Cooling Noise level Power level...
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Page 10: Range Of Usage & Limitations
2.2 Range of usage & limitations Models All models Item Indoor return air temperature (Upper, lower limits) Refer to the selection chart Outdoor air temperature (Upper, lower limits) Refrigerant line (one way) length Max. 15m Vertical height difference between Max. 10m (Outdoor unit is higher) outdoor unit and indoor unit Max. - Page 11 (2) Outdoor unit Models SRC20HD-S, 28HD-S, 20CD-S, 28CD-S Unit: mm Drain holes 264.5 404.5 17.8 2-16 x12 Terminal block 61.9 Service valve (Liquid) 139.3 33.3 Flare connecting ø6.35 (1/4") Service valve (Gas) Flare connecting ø9.52 (3/8") Models SRC40HD-S, 40CD-S 286.4 Drain hole 203.1 136.9...
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Page 12: Piping System
2.4 Piping system Models SRK20HD-S, 28HD-S, 40HD-S Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connecting Service valve temp. thermistor (Gas) Piping Check joint (Gas) 20, 28 : ø9.52 40 : ø12.7 4 way valve Accumulator Room temp. -
Page 13: 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 Cooling Heating... -
Page 14: Electrical Data
Power source 1 Phase 220/230/240V 50Hz Indoor unit Outdoor unit Y/GN Y/GN HEAT EXCHANGER 52X1 (250V 3.15A) (250V 3.15A) Printed circuit 52X2 board 52X3 Color symbol 52X1 Black Display Printed circuit Brown 52X2 board Wireless Light blue R-Amp 52X3 White Y/GN Yellow/Green Meaning of marks... - Page 15 Power source 1 Phase 220/230/240V 50Hz Outdoor unit Indoor unit Y/GN Y/GN HEAT EXCHANGER 52X1 (250V 3.15A) (250V 3.15A) Printed circuit 52X2 board Color symbol 52X1 Black Display Printed circuit Brown 52X2 board Wireless Light blue R-Amp White Y/GN Yellow/Green Meaning of marks Symbol Parts name...
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Page 16: Outline Of Operation Control By Microcomputer
OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch Remote controller 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 17: Back-Up Switch
Unit indication section Models All models RUN (HOT KEEP) light (green) • Illuminates during operation. • Flashes at air flow stop due to the ‘HOT KEEP’. (Heat pump type only) TIMER light (yellow) Illuminates during TIMER operation. HI POWER light (green) Illuminates during HI POWER operation. -
Page 18: Flap Control
4.4 Flap control Control the flap by AIRFLOW button on the wireless remote controller. (1) Air scroll The flap will be automatically set to the angle of air flow best to operation. (a) Starting time of operation During cooling and During heating dry operation operation... -
Page 19: Outline Of Heating Operation
4.6 Outline of heating operation (Heat pump type only) (1) Operation of major functional components Item When the compressor When the compressor When the compressor goes Functional command is OFF command is ON OFF due to an abnormal stop. components Indoor fan motor Flaps ON or OFF... - Page 20 (b) When the compressor and outdoor fan are stopped 1) While the compressor operation is delayed. 2) Up until 5 minutes have passed since the end of a compressor Speed 6 start delay operation, when 52C Auto fan control, Speed 4 or the set fan speed goes OFF, the indoor unit’s fan Speed 2...
- Page 21 (c) Operation of functinal components during defrosting operation Compressor command Hot keep Controlled by the indoor heat Hot keep exchanger temperature Indoor unit fan The chart at left is for reference. Hot keep control governs operation Operating lamp during heating. Flashes Outdoor unit fan 4-way valve...
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Page 22: Outline Of Cooling Operation
4.7 Outline of cooling operation (1) Operation of major functional components Item When the compressor When the compressor When the compressor goes Functional command is OFF command is ON OFF due to an abnormal stop. components Indoor fan motor Flaps ON or OFF ON or OFF Stop position control... -
Page 23: Outline Of Dehumidifying Operation
4.8 Outline of dehumidifying operation (1) Choose the appropriate operation block area by the difference between room temperature and thermostat setting temperature as shown below. ¡ Operation block area D Block C Block B Block A Block –2 Room temp. – Setting temp.(deg) (2) Start up operation C.D Block A.B Block... -
Page 24: Automatic Operation
4.9 Automatic operation (1) Determination of operation mode The blow operation of the indoor fan is carried out at the 1st speed for 20 seconds and the room temperature is checked to determine the operation mode automatically. (When the unit is operated by the turn-on timer, the blow operation is not carried out.) <... -
Page 25: Protective Control Function
4.11 Protective control function (1) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) (a) Operating conditions Indoor heat exchanger temperature (detected with Th2) is lower than 2.5ºC. (ii) 3 minutes elapsed after the start of operation. (b) Detail of anti-frost operation Compressor Indoor fan 1st speed... - Page 26 (7) Compressor Overheat Protection If the discharge pipe temperature (sensed by Th6) exceeds the set temperature value, the compressor stops. If the temperature is 95ºC or lower after a 3-minute delay, it starts again, but if this function is reactivated again within 60 minutes, it results in an abnormal stop. Operation possible Abnormal stop Discharge pipe temperature (˚C)
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Page 27: 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 28: Selection Of Location For Installation
5.1 Selection of location for installation (1) Indoor unit Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. 6.5 cm Right (b) A solid place where the unit or the wall will not vibrate. side Left A place where there will be enough space for servicing. -
Page 29: Installation Of Indoor Unit
5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board Look for the inside wall structures (Intersediate support or INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW) pillar and firaly install the unit after level surface has been Unit : mm checked.) Speace for... - Page 30 (3) Preparation of indoor unit (a) Mounting of connecting wires 1) Remove the lid (R). 2) Remove the terminal cover. 3) Remove the wiring clamp. 4) Connect the connecting wire securely to the terminal block. Terminal block Use cables for interconnection wiring to avoid loosening of the wires.
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Page 31: Installation Of Outdoor Unit
(4) Installation of indoor unit (a) Install the indoor unit on the mounting plate. Hook the upper part of the indoor unit on the stoppers disposed at the upper part of the mounting plate and lightly push the lower part of the indoor unit so that the unit is fixed in position. ¡... - Page 32 (2) Connection of refrigerant piping Outdoor unit side Indoor unit side ¡ Connect firmly gas and liquid side ¡ Connect firmly gas and liquid side pipings by Torque wrench. pipings by Torque wrench. Spanner (for fixing the piping) Torque wrench ¡...
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Page 33: Test Run
(b) It is very important to be careful of above when plugging in the unit to an already furnished electrical outlet. (4) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (5) Make sure that drain flows properly. (6) Standard operation data (220/230/240V) Model SRK20HD-S SRK28HD-S SRK40HD-S Item Cooling –... -
Page 34: Precautions For Wireless Remote Controller Installation And Operation
5.6 Precautions for wireless remote controller installation and operation (1) Wireless remote controller covers the following distances: (a) When operating facing the air conditioner: Notes (1) The remote controller is correctly facing the sensing element of the air conditioner when being manipulated. -
Page 35: 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 operations as mis-operations. -
Page 36: Thermistor Error
(2) Self diagnosis display on indoor unit RUN lamp Outdoor unit LED Trouble Cause ¡ Broken heat exchanger thermistor wire, connector Heat exchanger thermistor error 1 time flash poor connection ¡ Broken room temperature thermistor wire, TIMER lamp Room temperature thermistor error 2 time flash connector poor connection ¡... -
Page 37: Current Cut
Current cut [compressor lock] Is the service valve open? Service valve opened. Secure space for suction Is there any shortcircuit? and blow out. ¡ Check compressor wiring visually. If check results are normal, ¡ Check insulation resistance. (1 MΩ or over) Inspect compressor. - Page 38 [Wiring error including power cable, defective indoor/ Serial signal transmission error outdoor unit PCB] Does error persist after power Trouble by transient cause, not unit trouble. reset? Correct improper wire connection on indoor/ Is there any wrong connection on outdoor unit. indoor/outdoor unit wiring? Is DC 0~Approx.
- Page 39 (5) Inspection procedures of indoor electrical equipment Is fuse (3.15A) blown? Replace fuse. Is voltage applied between terminals 1~2 on terminal Replace PCB. block? (AC 220/230/240V) Is DC 0~12V detected between terminals 2~3 on terminal Replace PCB. block? Indoor electrical equipment are normal.
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Page 40: 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 41 WALL MOUNTED TYPE ROOM AIR-CONDITIONER Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 No.024(1.1A) RO...