Related Manuals for Mitsubishi Heavy Industries SRK28HJ
Summary of Contents for Mitsubishi Heavy Industries SRK28HJ
- Page 1 Manual No. '06 • SRK -T-058 Collection data WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air to air heat pump type) SRK28HJ SRK40HJ http://splitoff.ru/tehn-doc.html...
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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 ..............4 2.3 Exterior dimensions ................4 2.4 Piping system .................. -
Page 3: 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 or heating equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor. -
Page 4: Selection Data
2 SELECTION DATA 2.1 Specifications Model SRK28HJ (Indoor unit) SRC28HJ (Outdoor unit) Model SRK28HJ SRC28HJ Item Cooling capacity 2500 Heating capacity 2900 Power source 1 Phase, 220/230V, 50Hz Cooling input 0.94 Running current (Cooling) Heating input 0.88 Running current (Heating) Inrush current 17.3... - Page 5 Model SRK40HJ (Indoor unit) SRC40HJ (Outdoor unit) Model SRK40HJ SRC40HJ Item Cooling capacity 3600 Heating capacity 4200 Power source 1 Phase, 220/230V, 50Hz Cooling input 1.39 Running current (Cooling) Heating input 1.35 Running current (Heating) Inrush current 35.0 cooling : 2.59 Heating : 3.11 Sound level Cooling...
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Page 6: Range Of Usage & Limitations
％ Power source Within±15 ofratedvoltage Voltage drop during start ％ voltage Within±3 ofratedvoltage Interval unbalance ％ 2.3 Exterior dimensions (1) Indoor unit Model SRK28HJ Unit: mm 90 3 Pipingholeright(left) Terminalblock Remote controller PipingforGas 9.52)390 ¯ PipingforLiquid( 6.35)440 ¯ Drainhose600( ¯... - Page 7 Model SRK40HJ Unit: mm 90 3 Pipingholeright(left) Terminalblock Remote controller PipingforGas(¯ 2.7)390 PipingforLiquid(¯6.35)440 62 8 Drainhose600(¯ 6) Pipinghole Pipinghole (¯65) (¯65) VIEWA (2) Outdoor unit Models SRC28HJ, 40HJ Unit: mm Drainholes 417.5 510 140 -- 16 Terminal ✕ block 34.6 Servicevalve(Liquid) Flareconnecting 6.35(1/4ý)
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Page 8: Piping System
2.4 Piping system Model SRK28HJ oolingcycle Heatingcycle Indoor unit Outdoor unit Servicevalve(Gas) Flareconnecting Piping(Gas) ¯9.52 heck joint Discharge Room temperature thermistor Accumulator ompressor Heatexchanger 4wayvalve Heat Heatexchanger exchanger thermistor heckvalve Receiver Suction Piping(Liquid) ¯6.35 Strainer apillarytube Flareconnecting Servicevalve(Liquid) Model SRK40HJ... -
Page 9: 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 10: Electrical Data
3 ELECTRICAL DATA 3.1 Electrical wiring Model SRK28HJ Indoor unit Outdoor unit Power source 1 Phase 220/230V 50Hz ireless R-Amp Display Printed circuit board Color symbol Black Blue Brown Orange White Y/GN Yellow/Green Meaning of marks Symbol Parts name Symbol... - Page 11 Model SRK40HJ Indoor unit Outdoor unit Power source 1 Phase 220/230V 50Hz 52C3 52C420S23D 51C 2 3D 250V 3.15A Wireless R-Amp Display Printed circuit board Color symbol Black Blue Brown Orange White Y/GN Yellow/Green Meaning of marks Symbol Parts name Symbol Parts name Capacitor for CM...
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Page 12: Outline Of Operation Control By Microcomputer
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 13 (2) Flap control Control the flap by the AIRFLOW button on the wireless remote control (a) AUTO (Natural flow) The flap will be automatically set to the angle of air flow best to operation mode Starting time of operation In case of cooling and In case of heating Air flow when flaps are used dry operation...
- Page 14 (3) Back-up Switch When the remote controller batteries 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) Details of operation The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by thermistor), whether to go into the cooling, thermal dry or heating modes.
- Page 15 (5) Comfort timer settings Temperature is checked beginning 1 hour before the set time, and the power is turned on before the timer setting as necessary to bring the temperature to the proper level by the set time. Operating start time (amount of time Operation mode Room temperature thermistor (Th previous to set time that operation begins)
- Page 16 (9) Fan control (a) Fan speed change Mode COOL HEAT Fan speed knob AUTO See below Speed 1 (Speed 1) Speed 2 (Speed 2) Speed 1 (Speed 1) Speed 2 (Speed 2) Speed 3 (Speed 3) Speed 2 (Speed 2) HIGH Speed 3 (Speed 4) Speed 4 (Speed 5)
- Page 17 Function The indoor fan motor is controlled in accordance with the temperature of the indoor heat exchanger to send warm air from the start. When the air flow increases at heating starting as shown below, the temperature of the indoor heat exchanger become lower since the intake air temperature is still low.
- Page 18 (11) DRY operation (a) Choose the appropriate operation block area by the difference between room temperature and thermo- stat setting temperature as shown below. ¡Operation block area D Block C Block B Block A Block –2 Room temp. – Setting temp.(deg) (b) Start up operation C.D Block A.B Block...
- Page 19 Indoor heat exchanger temperature (˚C) (14) Microcomputer Controlled Timely Defrosting Operation S SRK28HJ Defrost Start Changes in the difference in temperature between the intake air temperature and the indoor heat exchanger temperature causes frost to build up, at which time defrosting begins. However, defrosting will not occur when the total compressor operation time or time after defrosting has ended is 40 minutes.
- Page 20 After that the defrost thermostat(23DH) will either tum OFF or the operation will stop after 10 minutes. (16) High-Pressure Control The indoor heat exchanger sensor detection temperature controls the outdoor fan and compressor. S SRK28HJ ¡ When the Indoor Heat Exchanger ¡ When the Indoor Heat Exchanger Temperature Is ≥...
- Page 21 S SRK40HJ ¡ When the indoor heat exchanger ¡ When the indoor heat exchanger temperature Is 61˚C temperature Is 64˚C Speed 4 Indoor fan Compressor Set fan Speed Indoor heat exchanger temperature (˚C) Indoor heat exchanger temperature (˚C) (17) Heating operation overload protection (40 type only) During heating operation in overload condition (room outside air temperature is considerably high), in order to protect the unit, the outdoor fan is controlled by the pressure switch (63H).
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Page 22: 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 23: Selection Of Location For Installation
5.1 Selection of location for installation (1) Indoor unit Unit: mm Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. Right side Left A solid place where the unit or the wall will not vibrate. side A place where there will be enough space for servicing. -
Page 24: Installation Of Indoor Unit
5.2 Installation of indoor unit (1) Installation if installation board (a) Fixing of installation board Lock for the inside wall structures (Intermediate support or pillar) Adjustment of the installation and firmly install the unit after level surface has been checked. board in the horizontal direction is to be conducted with lour screws in a temporary tightened state. - Page 25 (3) Preparation of indoor unit (a) Mounting of connecting wires Remove lid. (ii) Remove cover, terminal block cover. (iii) Connect the connection wire securely to the terminal block. Earth Wiring Affix the connection wire securely to the terminal block. If the wire Terminal Connecting Wiring is not affixed completely, contact will be poor, and it is dangerous...
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Page 26: Installation Of Outdoor Unit
(4) Installation of indoor unit Hang the upper portion of the unit rear cover on the mounting board, and then magnet on the lower unit portion will pull to fix the unit. Be sure not to leave any trap on the drain pipe. Slighty push Mounting block... - Page 27 (2) Connection of refrigerant piping Indoor unit side Outdoor unit side ¡ Connect firmly gas and liquid side pipings ¡ Connect firmly gas and liquid side by Torque wrench. pipings by Torque wrench. Spanner (for fixing the piping) Torque wrench ¡...
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Page 28: Test Run
It is very important to be careful of above when pulgging 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 (220/230V) Model SRK28HJ SRK40HJ Item Cooling – –... -
Page 29: Maintenance Data
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 understand the function controlled by a micro computer thoroughly, so as not to mistakenly identify correct opera- tions as mis-operations. - Page 30 (2) Indication of Self Diagnosis (Indoor unit) Connect of Defect Place of defect RUN lamp is flashing. Abnormality of heat ¡ Disconnection of heat exchanger thermistor. (1 Time flash.) exchanger thermistor. TIMER lamp RUN lamp is flashing. Abnormality of room ¡...
- Page 31 Anormality of thermistor Disconnection of thermistor and defective connection of connector Chart for thermistor temperature resistance characteristics Is connection to connector Repair connector. good? (Disconnection) Is thermistor resistance Replace thermistor. value normal? (kΩ) Replace PCB. (Short circuit) Temperature (°C) (4) Trouble Diagnostic Procedures Remove receptacle.
- Page 32 (5) Trouble shooting chart for the room temperature thermistor (Th ), heat exchanger thermistor (Th ) and defrost thermostat (23DH) Function Unit Thermistor Operation Short circuit Broken connection Continuous Cooling operation Cooling will not operate ¡ Cannot be turned ON/OFF by thermostat ¡...
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Page 33: 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 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. -
Page 34: Power Supply Remote Operation
6.3 Power supply remote operation When the remote part on indoor unit PCB is modified, the air conditioner is turned ON-OFF by power supply ON-OFF operation without using remote control switch. After the power supply remote operation, the operation contents can be modified by the remote controller. (1) Operation contents Operation change AUTO... - Page 35 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 http://splitoff.ru/tehn-doc.html No.036 （ 1.1A） R...