Page 2 - CONTENTS; Precautions for wireless remote control installation and
- 1 - CONTENTS 1. GENERAL INFORMATION .............................................................................. 1 1.1 Specific features ....................................................................................... 1 1.2 How to read the model name .........................................
Page 3 - GENERAL INFORMATION; Specific features; Remote control flap; How to read the model name; H G
- 1 - 1 GENERAL INFORMATION 1.1 Specific features The “MITSUBISHI HEAVY INDUSTRIES, LTD.” 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 ...
Page 4 - SELECTION DATA
- 2 - Item Model SRK20HG SRC20HG Cooling capacity (1) W 2070 Heating capacity (1) W 2360 Power source 1 Phase, 220/230/240V, 50Hz Cooling input kW 0.655 Running current (Cooling) A 2.9/3.1/3.3 Heating input kW 0.64 Running current (Heating) A 2.9/3.1/3.3 Inrush current A 15.5 COP Cooling: 3.16 Heati...
Page 7 - Exterior dimensions; Indoor unit; VIEW A
- 5 - 2.2 Range of usage & limitations Indoor return air temperature(Upper, lower limits) Refrigerant line (one way) length Max. 15m All models Power source voltage Rating ± 10% Voltage at starting Min. 85% of rating Frequency of ON-OFF cycle ON and OFF interval Max. 3 minutes Outdoor air temper...
Page 9 - Model SRK40HG; Models SRK20HG, 28HG
- 7 - 2.4 Piping system Model SRK40HG Outdoor unit Indoor unit Flare connecting Room temp. sensor Heatexchanger Flare connecting Piping (Liquid)ø6.35 Heat exchanger sensor Piping (Gas)ø9.52 Service valve(Gas) Check joint 4 way valve Service valve (Liquid) Strainer Capillary tube Capillary tube Capil...
Page 10 - obtained in the following way.; Net capacity = Capacity shown on specification; outdoor heat exchanger.; How to obtain the cooling and heating capacity; and outdoor dry-bulb temperature 35 ̊C is Net cooling capacity = 2070; Cooling
- 8 - 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 h...
Page 11 - ELECTRICAL D; Electrical wiring
- 9 - 3 ELECTRICAL D A T A 3.1 Electrical wiring Models SRK20HG, 28HG BR BRLB G Y/G Y/G Y/G Y/G Th1 Th4 Th5 Th6 Th2 R-AMP WIRELESS DISPLAY WH WH WH WH WH WH 3 ZNR ZNR N CNG CNE 250V 3.15A F 250V 3.15A F CNM BK BK BK BK BK Y Y BK 52C 52C-3 1 5 52C-4 BACK UP SW 8 2 2 5 U U FM I SM J RD RD RD RD RD TB ...
Page 12 - Model
- 10 - Model SRK40HG BR BRLB G Y/G Y/G Y/G Y/G Th1 Th4 Th5 Th6 Th2 R-AMP WIRELESS DISPLAY WH WH WH WH WH WH ZNR ZNR N CNG CNE CNM BK BK BK BK Y Y BK 52C 52C-3 52C-4 BACK UP SW 8 2 2 5 U SM J RD RD RD RD RD TB TB 3 1 CNW CFI IC15 CNU WH RD BR 3 L J N CM2 52X1 CM1 CC CM CFO D.S 52C 52X1 52X2 52X3 52X3...
Page 13 - OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER; Operation control function by remote control switch; Remote control
- 11 - 4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch Remote control Models All models ◆ Operation selection ◆ Indication selection FAN SPEED button Each time the button is pushed, the indicator is switched over in turn. · The above illustrati...
Page 14 - Operation; Power blackout auto restart function
- 12 - Unit indication selection Models All models ECONO light (orange) Illuminates during ECONOMY operation. RUN light (green) Illuminates during operation and CLEAN operation. TIMER light (yellow) Illuminates during TIMER operation. HI POWER light (green) Illuminates during HIGH POWER operation. U...
Page 15 - Custom cord switching procedure; Modifying the indoor unit’s printed circuit board; Control the flap by AIRFLOW button on the wireless remote control.; Swing flap; Flap moves in upward and downward directions continuously.; When not operating; Recommendable stopping angle of the flap
- 13 - 4.4 Custom cord switching procedure If two wireless remote controls are installed in one room, in order to prevent wrong operation due to mixed signals, please modify the printed circuit board in the indoor unit’s control box and the remote control using the following procedure. Be sure to mo...
Page 17 - Outline of heating operation
- 15 - 4.7 Outline of heating operation (1) Operation of major functional components (2) Fan speed switching (a) Auto fan control The indoor fan is automatically controlled in accordance with the difference between the room temperature (detected by the room temperature sensor) and the thermostat set...
Page 18 - When the compressor and outdoor fan are stopped
- 16 - (c) To accomplish rapid recovery from the thermostat off state, after the compressor and outdoor unit’s fan go OFF, the set temperature is raised by 1ºC until 1 minute passes after the hot keep end temperature has been reached following restarting. (5) Hot spurt (a) For 40 minutes after a hea...
Page 20 - Outline of cooling operation; room temperature sensor) and the termostat setting as shown below.; Running time
- 18 - 4.8 Outline of cooling operation (1) Operation of major functional components (2) Fan speed switching Indoor fan motor Flaps Display 52C Outdoor fan motor ON ON or OFF Lights up ON ON ON or OFF Lights up ON ON OFF Stop position control Lights up or flashes 4-way valve Depending on the stop mo...
Page 21 - DRY operation; Outline of dehumidifying operation; Operation block area; ECONOMY operation ( “ECONO” button on the remote control : ON); The set temperature changes as shown at right, and the
- 19 - Note (1) Thermostat operation is performed in A, B block. When compressor and indoor fan stop by thermostat operation within 12 minutes from start, temperature check is performed by operating indoor fan at speed 1 for 20 seconds before finishing 12 minutes and allowing decision of next operat...
Page 22 - Outline of clean operation; Operating condition; Outline of automatic operation; Determination of operation mode; operation mode, changes the operation mode.
- 20 - 27.5 25.5 19.5 18 30 4.11 Outline of clean operation COOL,DRY,AUTO (COOL,DRY); after operation has stopped, the moisture inside the dryer air conditioner, controls the production of fungus etc. (1) Operating condition ‘Clean’ is switched ON, when the air conditioner receives a STOP signal. (2...
Page 23 - Protective control function; minutes elapsed after the start of operation.; ON
- 21 - 4.12 Protective control function (1) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) (a) Operating conditions (i) 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-fro...
Page 25 - WARNING; observe this may result in injury.
- 23 - 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...
Page 26 - Selection of location for installation
- 24 - 5.1 Selection of location for installation (1) Indoor unit (a) Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (b) A solid place where the unit or the wall will not vibrate. (c) A place where there will be enough space for servicing. (Where s...
Page 27 - Installation of indoor unit; Fixing on concrete wall
- 25 - Adjustment of the installation board in the horizontaldirection is to be conducted with four screws in atemporary tightened state. 5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board (2) Drilling of holes and fixture sleeve (Option Parts) Wh...
Page 28 - ) Connect the connecting wire securely to the terminal block.; Installing the support of piping
- 26 - (3) Preparation of indoor unit (a) Mounting of connecting wires 1) Remove the lid(R). 2) Remove the wiring clamp. 3) Connect the connecting wire securely to the terminal block. 1 Connect the connection wire securely to the terminal block. If the wire is not affixed completely, contact will be...
Page 29 - Drainage; Arrange the drain hose in a downward angle.; Fixing of indoor unit; How to remove the indoor unit from the installation board
- 27 - [Drain hose changing procedures] 1. Remove the drain hose. ¡ R e m o v e t h e d r a i n h o s e ,making it rotate. Since this air conditioner has been designed to collect dew dropson the rear surface to the drain pan, do not attach the powercord above the gutter. Gutter Pipe accommodation se...
Page 30 - Installation of outdoor unit; Connect using ground screw located near; Connection of refrigerant pipings
- 28 - 5.3 Installation of outdoor unit (1) Installation of outdoor unit (a) Make sure that the unit is stable in installation. Fix the unit to stable base. (b) When installing the unit at a higher place or where it could be toppled by strong winds, secure the unit firmly with foundation bolts, wire...
Page 31 - Air purge
- 29 - Service Valve(three-way valve) Charge hose(Designed specifically for R22) Compoundpressuregauge Pressuregauge Gauge Manifold(Designed specifically for R22) Handle Hi. Vacuum pump Vacuum pump adapter(Anti-reverse flow type)(Designed specifically for R22) Charge hose(Designed specifically for R...
Page 32 - Standard operation data; Wireless remote control covers the following distances:; If the distances exceed the area indicated above, be sure to check
- 30 - 5.5 Test run (1) Conduct trial run after confirming that there is no gas leaks. (2) When conducting trial run set the remote control thermostat to continuous operation position. However when the power source is cut off or when the unit’s operation switch is turned off or was turned to fan ope...
Page 33 - MAINTENANCE DATA
- 31 - 6 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 u...
Page 34 - Inspection procedures corresponding to detail of trouble; Sensor error; S e n s o r t e m p e r a t u r e c h a r a c t e r i s t i c s
- 32 - RUN light 1 time flash 2 time flash 6 time flash TIMER light 1 time flash 2 time flash 4 time flash Outdoor unit LED OFF OFF OFF Heat exchanger sensor error Room temperature sensor error Indoor fan motor error ¡ Broken heat exchanger sensor wire, connectorpoor connection ¡ Broken room tempera...
Page 36 - Error of signal transmission; Phenomenon observed after shortcircuit, wire breakage on sensor.
- 34 - Error of signal transmission [Wiring error including power cable, defective indoor/outdoor unit PCB] Does error persist after powerreset? Is there any wrong connection onindoor/outdoor unit wiring? Is DC 0~Approx. 12V detectedbetween 2 ~ 3 terminals on indoor unit terminal block? YES YES NO N...
Page 39 - Air-Conditioning & Refrigeration Systems Headquarters
- 2 - WALL MOUNTED TYPEROOM AIR-CONDITIONER No.073(1A) RO Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926
