Page 1 September 29, 2009 INVERTER WALL MOUNTED TYPE ROOM AIR-CONDITIONER ( Split system, air to air heat pump type ) SRK20ZD-S1, SRK25ZD-S1, SRK35ZD-S1, SRK50ZD-S1 SRK63ZE-S1, SRK71ZE-S1 WALL MOUNTED TYPE ROOM AIR-CONDITIONER ( Split system, air to air heat pump type )
Page 2 TABLE OF CONTENTS 1. INVERTER WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air to air heat pump type) ..............001 2. WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air to air heat pump type) ..............137 3. WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air cooled cooling only type) ..............
Page 3 1. INVERTER WALL MOUNTED TYPE ROOM AIR-CONDITIONER Split system, air to air heat pump type 1.1 SRK20ZD-S1 SRK25ZD-S1 SRK35ZD-S1 SRK50ZD-S1 ............2 1.2 SRK63ZE-S1 SRK71ZE-S1............. 70...
Page 4: Table Of Contents
CONTENTS 1.1.1 GENERAL INFORMATION ............... 3 Specific features ..................3 How to read the model name..............3 1.1.2 SELECTION DATA ..................4 Specifications ..................4 Range of usage & limitations ............... 8 Exterior dimensions ................8 Piping system ..................10 Selection chart ..................
Page 5: General Information
(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 6: Selection Data
1.1.2 SELECTION DATA (1) Specifications Model SRK20ZD-S1 (Indoor unit) (220/230/240V) SRC20ZD-S1 (Outdoor unit) Model SRK20ZD-S1 SRC20ZD-S1 Item Cooling capacity 2000 (500~2800) Heating capacity 2700 (500~4600) Power source 1 Phase, 220-240V, 50Hz Cooling input 0.44 (0.1~0.91) Running current (Cooling) 2.4/2.3/2.2 Heating input 0.62 (0.09~1.27)
Page 7 Model SRK25ZD-S1 (Indoor unit) SRC25ZD-S1 (Outdoor unit) (220/230/240V) Model SRK25ZD-S1 SRC25ZD-S1 Item Cooling capacity 2500 (500~3000) Heating capacity 3400 (500~4800) Power source 1 Phase, 220-240V, 50Hz Cooling input 0.62 (0.1~0.97) Running current (Cooling) 3.1/3.0/2.9 Heating input 0.94 (0.09~1.30) Running current (Heating) 4.5/4.3/4.1 Inrush current 4.5/4.3/4.1...
Page 8 Model SRK35ZD-S1 (Indoor unit) SRC35ZD-S1 (Outdoor unit) (220/230/240V) Model SRK35ZD-S1 SRC35ZD-S1 Item Cooling capacity 3500 (500~3900) Heating capacity 4500 (500~5100) Power source 1 Phase, 220-240V, 50Hz Cooling input 1.09 (0.1~1.22) Running current (Cooling) 5.4/5.2/5.0 Heating input 1.24 (0.09~1.32) Running current (Heating) 5.9/5.7/5.4 Inrush current 5.9/5.7/5.4...
Page 9 Model SRK50ZD-S1 (Indoor unit) SRC50ZD-S1 (Outdoor unit) (220/230/240V) Model SRK50ZD-S1 SRC50ZD-S1 Item Cooling capacity 5000 (600~5300) Heating capacity 6300 (600~7900) Power source 1 Phase, 220-240V, 50Hz Cooling input 1.66 (0.12~2.1) Running current (Cooling) 7.6/7.3/7.0 Heating input 1.96 (0.11~2.71) Running current (Heating) 9.0/8.6/8.2 Inrush current 9.0/8.6/8.2...
Page 10: Range Of Usage & Limitations
Frequency of ON-OFF cycle (Inching prevention 10 minutes) (Inching prevention 5 minutes) ON and OFF interval Max. 3 minutes (3) Exterior dimensions (a) Indoor unit Models SRK20ZD-S1, 25ZD-S1, 35ZD-S1, 50ZD-S1 Unit: mm Piping hole right(left) Terminal block 117.5 117.5 216.5 216.5...
Page 11 (b) Outdoor unit Models SRC20ZD-S1, 25ZD-S1, 35ZD-S1 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 connection ø6.35 (1/4") Service valve (Gas) Flare connecting ø9.52 (3/8") Model SRC50ZD-S1 286.4 Drain holes 203.1 136.9 2-16x12...
Page 12: Piping System
(4) Piping system Models SRK20ZD-S1, 25ZD-S1, 35ZD-S1 Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connection Service valve temp. sensor (Gas) Muffler Piping Check joint (Gas) ø9.52 4 way valve Accumulator Room temp. Discharge pipe Heat Heat sensor temp.
Page 13: Selection Chart
0.92 1.00 How to obtain the cooling and heating capacity Example : The net cooling capacity of the model SRK20ZD-S1 with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C ✕ ✕ and outdoor dry-bulb temperature 35˚C is Net cooling capacity = 2000 0.975...
Page 14: Electrical Data
1.1.3 ELECTRICAL DATA (1) Electrical wiring Models SRK20ZD-S1, 25ZD-S1, 35ZD-S1...
Page 15 Model SRK50ZD-S1 AF_L2 AF_L1 PWB3 (CAPACITOR)
Page 16: Outline Of Operation Control By Microcomputer
1.1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (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 Each time the button is pushed, the indicator is switched over in turn.
Page 17: Unit On/Off Button
Unit indication section Models SRK20ZD-S1, 25ZD-S1, 35ZD-S1, 50ZD-S1 RUN (HOT KEEP) light (green) • Illuminates during operation. • Flashes at air flow stop due to the ‘HOT KEEP’. TIMER light (yellow) Illuminates during TIMER operation. HI POWER light (green) Illuminates during HI POWER operation.
Page 18: Flap Control
(4) Flap control Control the flap by AIRFLOW button on the wireless remote control. (a) Air scroll (AUTO) The flap will be automatically set to the angle of air flow best to operation. Starting time of operation During cooling and During heating dry operation operation...
Page 19: Outline Of Heating Operation
Depending on the stop mode Electronic expansion valve Depending on the EEV control (b) Air flow selection Speed of inverter changes within the range of selected air flow. Model SRK20ZD-S1 SRK25ZD-S1 SRK35ZD-S1 SRK50ZD-S1 Air flow selection Inverter command speed 30~100rps...
Page 20 ¡ Hot keep M mode [During HI POWER operation (for 15 min.)] (20, 25, 35 only) 9th speed (20, 25, 35 only) 8th speed 7th speed ¡ Values of A, B Indoor fan 6th speed 5th speed At 0 rps command 4th speed Other than 0 rps command...
Page 21: Outline Of Cooling Operation
2 Continued operation time of defrosting → For more than 10 min. (v) Heating “HI POWER” operation (HI POWER button on remote controller: ON) Operation is maintained for 15 minutes with a higher blow out air temperature. ¡ Detail of operation Model SRK20ZD-S1 SRK25, 35ZD-S1 SRK50ZD-S1 Item Inverter speed...
Page 22: Outline Of Dehumidifying Operation
(b) Air flow selection Speed of inverter changes within the range of selected air flow. Model SRK20ZD-S1 SRK25ZD-S1 SRK35ZD-S1 SRK50ZD-S1 Air flow selection Inverter command speed 20~60rps 20~70rps 20~98rps 15~90rps Auto Air flow Depends on inverter command speed. Inverter command speed...
Page 23 (b) Outline of control Cooling oriented dehumidifying Room temperature is checked at 5-minute intervals after selecting the cooling or heating oriented dehumidifying in order to determine the operation range. Note (1) Figures in the parentheses Operation range ( D ) ( C ) ( C ) ( B )
Page 24: Outline Of Automatic Operation
(9) Outline of automatic operation (a) Determination of operation mode The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20 seconds, determines the operation mode and the room temperature setting correction value, and then begins in the automatic operation.
Page 25 (c) Dew condensation prevention control [Cooling (including automatic), cooling oriented dehumidifying operation) ◆ SRK20, 25, 35ZD-S1 Operating conditions: When compressor is kept ON for 30 min. after the unit starts operation. (ii) Operation contents Type SRK20ZD-S1 SRK25ZD-S1 SRK35ZD-S1 Item Upper limit speed...
Page 26 (g) Inching prevention When the compressor goes into the thermo operation within 10(5) minutes since operation start or becomes various dehumidifying operations, the operation is continued with the command speed of 20(15) rps forcibly. Note (1) Values in ( ) are for Type 50. (h) Current safe Purpose: Current is controlled not to exceed the upper limit of the setting operation current.
Page 27 (m) Compressor overheat protection Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the compressor overheat. (ii) Detail of operation 1) Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe. (Example) Fuzzy 4 rps After lapse of 3 min.
Page 28 (p) Heating low outdoor temperature protective control (50 type only) ◆ <I> (a) Operating conditions: When the outdoor air temperature sensor (Th5) is 4ºC or lower continues for 5 minutes while the outdoor speed is other than 0 rps. (b) Operation content: When the command speed is less than 22 rps, the command speed is forcibly set at 22 rps.
Page 29 ◆ 50 type When stopped by indoor unit controller When stopped or reset by outdoor unit protective function Function Operation Heating, heating Cooling, cooling Heating, heating Cooling, cooling oriented dehumidifying oriented dehumidifying oriented dehumidifying oriented dehumidifying 2 min. 3 min. 3 min.
Page 30: Application Data
1.1.5 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 of an installation done in error resulting in death or serious injury are listed in the WARNING section.
Page 31: Selection Of Location For Installation
(1) Selection of location for installation (a) Indoor unit Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (ii) A solid place where the unit or the wall will not vibrate. (iii) A place where there will be enough space for servicing.
Page 32: Installation Of Indoor Unit
(2) Installation of indoor unit (a) Installation of installation board Fixing of installation board Look for the inside wall structures (Intersediate support or pillar and firaly install the unit after level surface has been Adjustment of the installation board in the horizontal checked.) direction is to be conducted with four screws in a temporary tightened state.
Page 33 (c) Preparation of indoor unit 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.
Page 34: Installation Of Outdoor Unit
(d) Installation on indoor unit 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 35 (b) Connection of refrigerant piping Indoor unit side Outdoor 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 ¡...
Page 36: Test Run
(ii) It is very important to be careful of above when plugging in the unit to an already furnished electrical outlet. (d) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (e) Make sure that drain flows properly. Standard operation data (220/230/240V) Model SRK20ZD-S1 SRK25ZD-S1 SRK35ZD-S1 SRK50ZD-S1 Item –...
Page 37: Precautions For Wireless Remote Controller Installation And Operation
(6) Precautions for wireless remote controller installation and operation (a) Wireless remote controller covers the following distances: 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 38: Maintenance Data
1.1.6 MAINTENANCE DATA (1) Troubleshooting procedures for electrical equipment (a) Cautions 1 If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an outdoor unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after discharg- ing this electrical charge (to DC 10 V or lower).
Page 39 (d) Troubleshooting procedure (If the air conditioner runs) Confirm the contents of the customer complaint. The cause of the trouble can be specifically identified. Eliminate the cause of the trouble and perform an Check the self-diagnosis display. operation check. See page 38. Is an error code displayed by Using the Service Mode, access the self-diagnosis the self-diagnosis function?
Page 40 (e) Self-diagnosis table When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of display lights. If the air conditioner is operated using the remote controller 3 minutes or more after the emergency stop, the trouble display stops and the air conditioner resumes operation.
Page 41 Service mode (Trouble mode access function) This air conditioner is capable of recording error displays and protective stops (service data) which have occurred in the past. If self-diagnosis displays cannot be confirmed, it is possible to get a grasp of the conditions at the time trouble occurred by checking these service data.
Page 42 *3: To count the number of flashes in the service mode, count the number of flashes after the light lights up for 1.5 second initially (start signal). (The time that the light lights up for 1.5 second (start signal) is not counted in the number of flashes.) •...
Page 43: Remote Controller Setting
2 Stop data Remote controller setting Displayed data Operation Fan speed Temperature switching switching setting Cooling 21°C Displays the reason for the stop (stop code) the previous time when the air conditioner was stopped by protective stop control. 22°C Displays the reason for the stop (stop code) 2 times previous when the air conditioner was stopped by protective stop control. 23°C Displays the reason for the stop (stop code) 3 times previous when the air conditioner was stopped by protective stop control.
Page 44 Number of flashes when in service mode Stop code Error content Auto Error Occurrence conditions Cause TIMER recovery display light Error code light Major category Minor category (10’s digit) (1’s digit) Current Overcharge 4 time 1 time Cooling overload 1 When there is a current safe stop in overload 1 mode safe Compressor lock...
Page 45 Notes (1) The number of flashes when in the Service Mode do not include the 1.5 second period when the light light up at first (starting signal). (See the example shown below.) • In the case of current safe (heating CT1) (example: stop code “32”) The RUN light (10’s digit) flashes 3 times and the TIMER light (1’s digit) flashes 2 times.
Page 46 (v) Room temperature sensor temperature, indoor heat exchanger sensor temperature, outdoor air tempera- ture sensor temperature, outdoor heat exchanger sensor temperature table Units:˚C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (minus) (sounds for 0.1 second) (does not sound) * If no data are recorded (error code is normal), the display for each sensor becomes as shown below.
Page 47 (vi) Discharge pipe temperature table Units: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (minus) (sounds for 0.1 second) (does not sound) * If no data are recorded (error code is normal), the display for each sensor becomes as shown below. Sensor value displayed when the error code is normal Sensor name -64°C...
Page 48 Service data record form Customer Model Date of investigation Machine name Content of complaint Display results Remote controller settings Display content Content of displayed data Temperature setting Operation switching Fan speed switching Buzzer (Yes/No.) RUN light (Times) TIMER light (Times) Error code on previous occasion.
Page 49: Current Cut
(g) 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. ◆ Discharge pipe sensor temperature characteristics ◆ Sensor temperature characteristics (Room temp., indoor unit heat exchanger Temperature (˚C) Resistance (kΩ)
Page 50: Outdoor Unit Error
[Broken power transistor Outdoor unit error broken compressor wire] Is output voltage applied to all 3 Defective inverter phases of power transistor? (Refer to page 53 for details) Is compressor wiring connected Connect securely. securely? Inspect compressor. [Gas shortage, defective discharge Compressor overheat pipe sensor] Connector connection check, resistance...
Page 51 [Wiring error including power cable, defective indoor/ Serial signal transmission error outdoor unit PCB, error on power supply system] 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.
Page 52 [Defective fan motor, Outdoor fan motor error defective PCB] Correct connector Is connector connection good? connection. Defective indoor unit Is voltage applied to fan motor? Defective fan motor (h) Phenomenon observed after shortcircuit, wire breakage on sensor. Indoor unit Phenomenon Operation Sensor mode...
Page 53 How to make sure of remote controller Inspection procedures of indoor electrical equipment Is fuse (3.15A) blown? Replace fuse. Is remote Remote controller controller defects normal? Is voltage applied between terminals 1~2 on terminal Replace PCB. block? (AC 220/230/240V) Again pushing operating switch Is DC 0~12V detected between terminals 2~3 on terminal...
Page 56: Servicing
(2) Servicing (a) 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 57: Refrigerant Piping Installation/Servicing Manual For Air Conditioners Using R410A
1.1.7 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) (1) Outline Refrigerant R410A 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 58: Refrigerant Piping Installation
(iii) 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 59 (ii) Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. 1) 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 60 4) 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 61 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 (ii) Flare connecting procedures and precautions 1) Make sure that the flare and union portions do not have any scar or dust, etc.
Page 62 (ii) Identification 1) Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 (see on page 56), and, as shown in Tables 5 and 6 (see on page 58), 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 63 (iii) Flux 1) 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 64: 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 65 Tools exclusive for R410A 1) 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 66 5) 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 67 New installation work (when using new refrigerant piping) Air purge by vacuum pump and gas leakage inspection (see Fig. 6) 1) Connect the charge hose to the outdoor unit. 1 2) Connect the charge hose to the vacuum pump adapter. 2 At this time, keep the control valves in the fully closed position.
Page 68 6) 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 7) Quickly remove the charge hose from the service port. 6 When stopped halfway, refrigerant being cycled will be released. 8) After securing the caps on the service port and control valve, check the caps’...
Page 69: Refrigerant Recovery
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 70 (iv) Recovering procedures 1) According to the instructions for handling the refrigerant recovering equipment (described in the attached instruction manual), operate the equipment to recover refrigerant. 2) 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 71 2) 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. (iv) Gauge manifold Hose Setting...
Page 72 CONTENTS 1.2.1 GENERAL INFORMATION ............... 71 Specific features ..................71 How to read the model name ............... 71 1.2.2 SELECTION DATA ..................72 Specifications ..................72 Range of usage & limitations ............... 74 Exterior dimensions ................74 Piping system ..................75 Selection chart ..................
Page 73: General Information
(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 74: Selection Data
1.2.2 SELECTION DATA (1) Specifications Model SRK63ZE-S1 (Indoor unit) SRC63ZE-S1 (Outdoor unit) (220/230/240V) Model SRK63ZE-S1 SRC63ZE-S1 Item Cooling capacity 6300 (900~7100) Heating capacity 7100 (900~9000) Power source 1 Phase, 220-240V, 50Hz Cooling input 1.84 Running current (Cooling) 8.4/8.1/7.7 Heating input 1.86 Running current (Heating) 8.5/8.2/7.8...
Page 75 Model SRK71ZE-S1 (Indoor unit) SRC71ZE-S1 (Outdoor unit) (220/230/240V) Model SRK71ZE-S1 SRC71ZE-S1 Item Cooling capacity 7100 (900~8000) Heating capacity 8000 (900~10500) Power source 1 Phase, 220-240V, 50Hz Cooling input 2.21 Running current (Cooling) 10.1/9.7/9.3 Heating input 2.21 Running current (Heating) 10.1/9.7/9.3 Inrush current 10.1/9.7/9.3 Cooling: 3.21 Heating: 3.62...
Page 76: Range Of Usage & Limitations
(2) Range of usage & limitations Models SRK63ZE-S1, 71ZE-S1 Item Cooling operation: Approximately 18 to 32°C Indoor return air temperature Heating operation: Approximately 15 to 30°C (Upper, lower limits) Outdoor air temperature Cooling operation: Approximately -15 to 46°C (Upper, lower limits) Heating operation: Approximately -15 to 21°C Refrigerant line (one way) length Max.
Page 77: Piping System
(b) Outdoor unit Models SRC63ZE-S1, 71ZE-S1 Drain holes Unit: mm 25.8 2-ø15 29.8 87.9 Terminal block Service valve (Liquid) 165.5 25.1 Flare fitting ø6.35 (1/4") Service valve (Gas) Flare fitting ø15.88 (5/8") (4) Piping system Models SRK63ZE-S1, 71ZE-S1 Indoor unit Outdoor unit Cooling cycle Heating cycle...
Page 78: Selection Chart
(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. (a) Coefficient of cooling and heating capacity in relation to temperatures 1.
Page 79: Electrical Data
1.2.3 ELECTRICAL DATA (1) Electrical wiring Models SRK63ZE-S1, 71ZE-S1 •– 77 •[...
Page 80: Outline Of Operation Control By Microcomputer
1.2.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by remote control switch (a) 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 81 (b) Wired remote control (Optional parts) 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 82: Unit On/Off Button
(c) Unit indication section RUN (HOT KEEP) light (green) Models All models • Illuminates during operation. • Brinks 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. ECONO light (orange) Illuminates during ECONOMY operation.
Page 83: Custom Cord Switching Procedure
(4) Custom cord switching procedure EXTERNAL INPUT If two wireless remote controls are installed in one room, in order to prevent wrong WIRED REMOCON operation due to mixed signals, please modify the printed circuit board in the indoor OPE PERMISSION CUSTOM Jumper wire (J4) unit’s control box and the remote control using the following procedure.
Page 84: Comfortable Timer Setting
(6) Comfortable timer setting If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.
Page 85: Outline Of Heating Operation
(8) Outline of heating operation (a) Operation of major functional components in heating mode Item When the inverter When the inverter speed When the inverter speed is 0rps Functional speed is 0rps is other than 0rps due to an anomalous stop components Indoor fan motor Flap and louver...
Page 86 (iii) Hot keep operation If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature of the indoor unit heat exchanger (detected with Th2, indoor unit heat exchanger sensor) to prevent blowing of cool wind. ¡...
Page 87 (ii) Operation of functional components during defrosting operation indoor unit Hot keep Hot keep Corresponding to speed Indoor fan motor RUN light Flashing (Hot keep) outdoor unit 70rps Fuzzy calculated value Inverter command Corresponding to speed Outdoor fan motor 40sec. 40sec. 4-way valve Defrost 120sec.
Page 88: Outline Of Cooling Operation
(9) Outline of cooling operation (a) Operation of major functional components in Cooling mode Item When the inverter When the inverter speed When the inverter speed is 0rps Functional speed is 0rps is other than 0rps due to an anomalous stop components Indoor fan Flap and louver...
Page 89: Outline Of Dehumidifying Operation
(10) Outline of dehumidifying operation (a) After operating the indoor blower for 20 seconds from immediately after the start of operation, the indoor temperature is checked and, based on the result of check, the cooling oriented dehumidifying or heating oriented dehumidifying is selected. Heating oriented dehumidifying Cooling oriented dehumidifying –3...
Page 90: Outline Of Automatic Operation
(ii) Heating oriented dehumidifying After interrupting the compressor operation for 3 minutes (by the 3-minute timer) following the determination of heating oriented dehumidifying, the unit begins in the heating operation. If the room temperature exceeds the setting temperature by 2ºC or more, the unit checks the room temperature at 5-minute intervals and, depending on the result, determines the range of heating oriented dehumidifying operation within the (M) range.
Page 91: Outline Of Fan Operation
(12) Outline of fan operation (a) Operation of major functional components Fan speed switching Functional AUTO ECONO components Inverter command speed 0rps Indoor fan motor 2nd speed 8th speed 6th speed 4th speed 2nd speed 2nd speed Outdoor fan motor Flap and louver Depend on the flap and louver control (13) Outline of clean operation...
Page 92 Fan operation1 Operation content Inverter command speed 0 rps Indoor fan motor 1st speed Outdoor fan motor Flap and louver Fully closed/ Center (ii) Cooling operation Operation content Note (1) During cooling operation safety control,frost Inverter command speed 20 rps prevention control, and cooling overload pro- Indoor fan motor 2nd speed...
Page 93: Economy Operation
(iv) Fan operation2 (v) Standby operation Operation content Operation content Inverter command speed 0 rps Inverter command speed 0 rps Indoor fan motor Indoor fan motor Outdoor fan motor 2nd speed Outdoor fan motor Determined by stop mode Flap and louver Fully closed/ Center Flap and louver Fully closed/ Center...
Page 94: Operation Permission/Prohibition Control
(17) Operation permission/prohibition control 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. (a) The operation mode is switched over between Permission and Prohibition by releasing the jumper wire (J3) on the indoor control board.
Page 95: Protective Control Function
(18) Protective control function (a) Indoor fan motor protection When the air conditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 rpm or under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system. TIMER light illuminates simultaneously and the RUN light flashing 6 times at each 8-second.
Page 96 ◆ < II > Operating conditions: When all of the following conditions are met. 1 After the inverter command speed is at a value other than 0 rps for 8 minutes, when the indoor heat exchanger tempera- ture is less than 5°C. 2 When the inverter command speed is more than 20 rps.
Page 97 ◆ < II > Operating conditions: When the outdoor air temperature sensor (Th5) is 22ºC or lower continues for 30 seconds while outdoor speed is other than 0rps. (ii) Detail of operation: 1 The lower limit of inverter command speed is set to 20(30)rps and even if the speed becomes lower than 20(30)rps, the speed is kept to 20(30)rps.
Page 98 (h) Heating low outdoor temperature protective control ◆ < I > Operating conditions: When the outdoor air temperature sensor (Th5) is 4°C or lower continues for 30 seconds while outdoor speed is other than 0rps. (ii) Detail of operation: When the inverter command speed is less than 20rps, the speed is forcibly set at 20rps. However, when the thermo becomes OFF, the speed is reduced to 0rps.
Page 99 Freezing cycle system protective control Operating conditions: When both of following conditions have continued for more than 5 minutes later than 5 minutes after the start of operation. Inverter command speed is higher than 60 rps During cooling, dehumidifying: Indoor heat exchanger temperature–Room temperature > –4ºC During heating: Indoor heat exchanger temperature–Room temperature <...
Page 100 (q) Power transistor overheat protection Purpose: In order to prevent the power transistor overheating during operation, faulty controller operations, deterioration, damage and so on occurs. (ii) Detail of operation: 1 Power transistor sensor temperature = > 110ºC The compressor is stopped immediately. When the power transistor sensor temperature is less than 80°C, restart. 2 90ºC = <...
Page 101 Compressor lock If the motor for the compressor does not turn 1/12 revolution 0.044 seconds after it has been started, it is determined that a compressor lock has occurred and the compressor is stopped. (u) Outdoor fan motor protection If the outdoor fan motor has operated at 75rpm or under for more than 30 seconds, the inverter and fan motor are stopped. (v) Stop mode Operating conditions: When the operation mode is changed, when the dehumidifying operation is changed from the heating oriented mode to the cooling oriented mode or vice versa, or when the inverter speed...
Page 102: Application Data
1.2.5 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 of an installation done in error resulting in death or serious injury are listed in the WARNING section.
Page 103: Selection Of Location For Installation
(1) Selection of location for installation (a) Indoor unit Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (ii) A solid place where the unit or the wall will not vibrate. 6.5 cm Right (iii) A place where there will be enough space for servicing.
Page 104: Installation Of Indoor Unit
(2) Installation of indoor unit (a) Installation of installation board 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 checked.) Mating mark for level surface Adjustment of the installation board in the horizon-...
Page 105 (c) Preparation of indoor unit Mounting of connecting wires 1) Open the air inlet panel. 2) Remove the lid. 3) Remove the wiring clamp. 4) Connect the connecting wire securely to the terminal block. Use cables for interconnection wiring to avoid loosening of the wires.
Page 106 [Drain hose changing procedures] 1. Remove the drain hose. 2. Remove the drain cap. 3. Insert the drain cap. 4. Connect the drain hose. ¡Remove the drain hose, ¡Remove it with hand or ¡Insert the drain cap which was removed at ¡I n s e r t t h e d r a i n h o s e making it rotate.
Page 107: Installation Of Outdoor Unit
(3) Installation of outdoor unit (a) Installation of outdoor unit Make sure that the unit is stable in installation. Fix the unit to stable base. (ii) 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, etc.
Page 108: Test Run
(c) Air purge Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak. (ii) Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below. (iii) Open manifold valve handle Lo to its full width, and perform vacuum or evacuation. Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads –...
Page 109 (d) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (e) Make sure that drain flows properly. Standard operation data (220/230/240V) Model SRK63ZE-S1 SRK71ZE-S1 Item – – Cooling High pressure (MPa) Heating 2.5~2.7 2.6~2.8 Cooling 0.8~1.0...
Page 110: Precautions For Wireless Remote Control Installation And Operation
(6) Precautions for wireless remote control installation and operation (a) Wireless remote control covers the following distances: When operating facing the air conditioner: Notes (1) The remote control is correctly facing the sensing element of the air conditioner when being manipulated.
Page 111: Installation Of Wired Remote Control And Super Link Adapter (Sc-Ad-E) (Optional Parts)
(7) Installation of wired remote con- (iv) Cut the jumper attached on the board. trol and super link adapter (SC-AD- • Remove the upper box. Remove the screw, the latch and the band. E) (Optional parts) (a) Modifying the indoor unit’s printed circuit Screw Band board...
Page 112 (b) Installation of wired remote control (Optional 2) Recessed fitting parts) a) The Electrical box and remote control (shield (i) Selection of installation location wire must be use in case of extension) are Avoid the following locations first embedded. 1) Direct sunlight. 2) Close to heating device.
Page 113 (c) 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 114 (ii) Function setting method perating guide message Function description: B , Settting: C 1) Stop the air conditioner 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 115 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 116 (iv) Changing the remote control’s temperature setting range 1) The temperature setting range of the remote controller can be changed. Through remote controller button operations, the upper limit and lower limit set temperature values can be changed individually. 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 117 (d) SUPER LINK ADAPTER (SC-AD-E) (i) 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 118: Maintenance Data
1.2.6 MAINTENANCE DATA (1) Troubleshooting procedures for electrical equipment (a) Cautions 1 If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an outdoor unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after discharg- ing this electrical charge (to DC 10 V or lower).
Page 119 (d) Troubleshooting procedure (If the air conditioner runs) Confirm the contents of the customer complaint. The cause of the trouble can be specifically identified. Eliminate the cause of the trouble and perform an Check the self-diagnosis display. operation check. See pages 118. Is an error code displayed by Using the Service Mode, access the self-diagnosis the self-diagnosis function?
Page 120 (e) Self-diagnosis table When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of display lights. If the air conditioner is operated using the remote control 3 minutes or more after the emergency stop, the trouble display stops and the air conditioner resumes operation.
Page 121 Service mode (Trouble mode access function) This air conditioner is capable of recording error displays and protective stops (service data) which have occurred in the past. If self-diagnosis displays cannot be confirmed, it is possible to get a grasp of the conditions at the time trouble occurred by checking these service data.
Page 122 *3: To count the number of flashes in the service mode, count the number of flashes after the light lights up for 1.5 second initially (start signal). (The time that the light lights up for 1.5 second (start signal) is not counted in the number of flashes.) •...
Page 123 2 Stop data Remote control setting Displayed data Operation Fan speed Temperature switching switching setting Cooling 21°C Displays the reason for the stop (stop code) the previous time when the air conditioner was stopped by protective stop control. 22°C Displays the reason for the stop (stop code) 2 times previous when the air conditioner was stopped by protective stop control. 23°C Displays the reason for the stop (stop code) 3 times previous when the air conditioner was stopped by protective stop control.
Page 124 Number of flashes when in service mode Stop code Error content Auto Error Occurrence conditions Cause TIMER recovery display light Error code light Major category Minor category (10’s digit) (1’s digit) Current Overcharge 4 time 1 time Cooling overload 1 When there is a current safe stop in overload 1 mode safe Compressor lock...
Page 125 Notes (1) The number of flashes when in the Service Mode do not include the 1.5 second period when the lights light up at first (starting signal). (See the example shown below.) • In the case of current safe (heating CT1) (example: stop code “32”) The RUN light (10’s digit) flashes 3 times and the TIMER light (1’s digit) flashes 2 times.
Page 126 (v) Room temperature sensor temperature, indoor heat exchanger sensor temperature, outdoor air tempera- ture sensor temperature, outdoor heat exchanger sensor temperature table Units: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (minus) (sounds for 0.1 second) (does not sound) * If no data are recorded (error code is normal), the display for each sensor becomes as shown below.
Page 127 (vi) Discharge pipe temperature table Units: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (minus) (sounds for 0.1 second) (does not sound) * If no data are recorded (error code is normal), the display for each sensor becomes as shown below. Sensor value displayed when the error code is normal Sensor name -64°C...
Page 128 Service data record form Model Customer Date of investigation Machine name Content of complaint Display results Remote control settings Display content Content of displayed data Temperature setting Operation switching Fan speed switching Buzzer (Yes/No.) RUN light (Times) TIMER light (Times) Error code on previous occasion.
Page 129 (g) 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 130 [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 131 [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 127) Check if there are any Does trouble persist after Is sufficient quantity of refrigerant places where gas is leaking.
Page 132 [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 133 (ii) 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 134 Inverter failure diagnosis If the results of the diagnosis in Item (h) indicate that the inverter is defective, perform the following inspection on the inverter. Diagnosis procedure Fuse is defective Is the fuse good? e Replace Varistor is defective Is the varistor good? e Replace Noise filter is defective Is the noise filter good?
Page 136 ◆ 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 137: Servicing
(2) Servicing (a) 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 138 MEMO...
Page 139: Wall Mounted Type
2. WALL MOUNTED TYPE ROOM AIR-CONDITIONER Split system, air to air heat pump type 2.1 SRK20HD-S1 SRK20HC-S2 SRK28HD-S1 SRK28HC-S2 SRK40HD-S1 SRK40HC-S2 .........138 2.2 SRK50HE-S1 SRK56HE-S1 ............176 2.3 SRK63HE-S1 SRK71HE-S1 ............211...
Page 140 CONTENTS 2.1.1 GENERAL INFORMATION ..............139 Specific features ................... 139 How to read the model name .............. 139 2.1.2 SELECTION DATA ................... 140 Specifications ..................140 Range of usage & limitations .............. 146 Exterior dimensions ................146 Piping system ..................148 Selection chart ..................
Page 141: General Information
(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 142: Selection Data
2.1.2 SELECTION DATA (1) Specifications Model SRK20HD-S1 (Indoor unit) SRC20HD-S1 (Outdoor unit) (220/230/240V) Model SRK20HD-S1 SRC20HD-S1 Item Cooling capacity 2050 Heating capacity 2200 Power source 1 Phase, 220–240V, 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 143 Model SRK28HD-S1 (Indoor unit) SRC28HD-S1 (Outdoor unit) (220/230/240V) Model SRK28HD-S1 SRC28HD-S1 Item Cooling capacity 2550 Heating capacity 2800 Power source 1 Phase, 220–240V, 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...
Page 144 Model SRK40HD-S1 (Indoor unit) SRC40HD-S1 (Outdoor unit) (220/230/240V) Model SRK40HD-S1 SRC40HD-S1 Item Cooling capacity 3600 Heating capacity 4000 Power source 1 Phase, 220–240V, 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...
Page 145 Model SRK20HC-S2 (Indoor unit) SRC20HC-S2 (Outdoor unit) (220/230/240V) Model SRK20HC-S2 SRC20HC-S2 Item Cooling capacity 2050 Heating capacity 2200 Power source 1 Phase, 220–240V, 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 Cooling: 3.21 Heating: 3.61 Sound level Cooling...
Page 146 Model SRK28HC-S2 (Indoor unit) SRC28HC-S2 (Outdoor unit) (220/230/240V) Model SRK28HC-S2 SRC28HC-S2 Item Cooling capacity 2550 Heating capacity 2800 Power source 1 Phase, 220–240V, 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...
Page 147 Model SRK40HC-S2 (Indoor unit) SRC40HC-S2 (Outdoor unit) (220/230/240V) Model SRK40HC-S2 SRC40HC-S2 Item Cooling capacity 3600 Heating capacity 4000 Power source 1 Phase, 220–240V, 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 COP (Cooling) Cooling: 3.21 Heating: 3.42...
Page 148: Range Of Usage & Limitations
(2) Range of usage & limitations Models All models Item Indoor return air temperature Cooling operation : Approximately 21 to 32˚C (Upper, lower limits) Heating operation : Approximately 15 to 30˚C Outdoor air temperature Cooling operation : Approximately 21 to 43˚C (Upper, lower limits) Heating operation : Approximately -5 to 21˚C Refrigerant line (one way) length...
Page 149 Models SRK20HC-S2, 28HC-S2, 40HC-S2 Unit: mm Piping hole right (left) Therminal block 117.5 117.5 216.5 216.5 148.5 148.5 216.5 216.5 14.5 67.5 53.5 Piping for Gas 20.28: ø9.52 397.1 ø12.7 Piping for Liquid 465.1 (ø6.35) Drain hose 540 (ø16) VIEW A Piping hole (ø65) Piping hole...
Page 150: Piping System
Models SRC40HD-S1, 40HC-S2 286.4 Drain hole 203.1 136.9 Elogated hole (2-12 x16) Terminal block 34.6 Ground terminal Service valve (Liquide) ø6.35 (1/4'') Service valve (Gas) ø12.7 (1/2'') (4) Piping system Models SRK20HD-S1, 28HD-S1, 40HD-S1, 20HC-S2, 28HC-S2, 40HC-S2 Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air...
Page 151: Selection Chart
(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. (a) Coefficient of cooling and heating capacity in relation to temperatures Cooling Heating...
Page 152: Electrical Data
2.1.3 ELECTRICAL DATA (1) Electrical wiring Models SRK20HD-S1, 28HD-S1, 40HD-S1, 20HC-S2, 28HC-S2, 40HC-S2...
Page 153: Outline Of Operation Control By Microcomputer
2.1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (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 154: Unit On/Off Button
Unit indication section Models SRK20HD-S1, 28HD-S1, 40HD-S1 Models SRK20HC-S2, 28HC-S2, 40HC-S2 SRK20CD-S1, 28CD-S1, 40CD-S1 SRK20CC-S1, 28CC-S1, 40CC-S1 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.
Page 155: Flap Control
(4) Flap control Control the flap by AIRFLOW button on the wireless remote controller. (a) Air scroll The flap will be automatically set to the angle of air flow best to operation. Starting time of operation During cooling and During heating dry operation operation Stops for approximately...
Page 156: Outline Of Heating Operation
(6) Outline of heating operation (Heat pump type only) (a) 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 157 (ii) 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 158 (iii) Operation of functional 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...
Page 159: Outline Of Cooling Operation
(7) Outline of cooling operation (a) 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 160: Outline Of Dehumidifying Operation
(8) Outline of dehumidifying operation (a) 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) (b) Start up operation C.D Block A.B Block...
Page 161: Automatic Operation
(9) Automatic operation (a) 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 162: Protective Control Function
(11) Protective control function (a) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) Operating conditions Indoor heat exchanger temperature (detected with Th2) is lower than 2.5ºC. 3 minutes elapsed after the start of operation. (ii) Detail of anti-frost operation Compressor Indoor fan 1st speed...
Page 163 (g) 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)
Page 164: Application Data
2.1.5 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 of an installation done in error resulting in death or serious injury are listed in the WARNING section.
Page 165: Selection Of Location For Installation
(1) Selection of location for installation (a) Indoor unit Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. 6.5 cm Right (ii) A solid place where the unit or the wall will not vibrate. side Left (iii) A place where there will be enough space for servicing.
Page 166: Installation Of Indoor Unit
(2) Installation of indoor unit (a) Installation of installation board 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 167 (c) Preparation of indoor unit 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.
Page 168: Installation Of Outdoor Unit
(d) Installation of indoor unit 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 169 (b) 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 ¡...
Page 170: Test Run
(5) Test run (a) Conduct trial run after confirming that there is no gas leaks. (b) When conducting trial run set the remote controller 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 operation position, the unit will not go into operation in order to protect the compressor.
Page 171: Precautions For Wireless Remote Controller Installation And Operation
(6) Precautions for wireless remote controller installation and operation (a) Wireless remote controller covers the following distances: 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 172: Maintenance Data
2.1.6 MAINTENANCE DATA (1) Trouble shooting (a) 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 173 (b) Self diagnosis display on indoor unit RUN light Outdoor unit LED Trouble Cause ¡ Broken heat exchanger sensor wire, connector Heat exchanger sensor error 1 time flash poor connection ¡ Broken room temperature sensor wire, connec- TIMER light Room temperature sensor error 2 time flash tor poor connection ¡...
Page 174 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 175 [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 176 (e) 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.
Page 177: Servicing
(2) Servicing (a) 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 178 CONTENTS 2.2.1 GENERAL INFORMATION ..............177 Specific features ................... 177 How to read the model name .............. 177 2.2.2 SELECTION DATA ................... 178 Specifications ..................178 Range of usage & limitations .............. 180 Exterior dimensions ................180 Piping system ..................181 Selection chart ..................
Page 179: General Information
(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 180: Selection Data
2.2.2 SELECTION DATA (1) Specifications Model SRK50HE-S1 (Indoor unit) SRC50HE-S1 (Outdoor unit) (220/230/240V) Model SRK50HE-S1 SRC50HE-S1 Item Cooling capacity 4700 Heating capacity 5300 Power source 1 Phase, 220-240V, 50Hz Cooling input 1.41 Running current (Cooling) 6.5/6.3/6.0 Heating input 1.40 Running current (Heating) 6.5/6.2/6.0 Inrush current 39.6...
Page 181 Model SRK56HE-S1 (Indoor unit) SRC56HE-S1 (Outdoor unit) (220/230/240V) Model SRK56HE-S1 SRC56HE-S1 Item Cooling capacity 5100 Heating capacity 5800 Power source 1 Phase, 220-240V, 50Hz Cooling input 1.59 Running current (Cooling) 7.3/7.1/6.8 Heating input 1.58 Running current (Heating) 7.4/7.1/6.8 Inrush current 45.2 Cooling: 3.21 Heating: 3.67 Sound level...
Page 182: Range Of Usage & Limitations
(2) Range of usage & limitations Models All models Item Indoor return air temperature Cooling operation : Approximately 21 to 32˚C (Upper, lower limits) Heating operation : Approximately 15 to 30˚C Outdoor air temperature Cooling operation : Approximately 21 to 43˚C (Upper, lower limits) Heating operation : Approximately -5 to 21˚C Refrigerant line (one way) length...
Page 183: Piping System
(b) Outdoor unit Models All models 286.4 Drain holes 203.1 136.9 Elogated hole (2-12 x16) Terminal block 34.6 Ground terminal Service valve (Liquid) ø6.35 (1/4'') Service valve (Gas) ø12.7 (1/2'') (4) Piping system Models SRK50HE-S1, 56HE-S1 Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air...
Page 184: Selection Chart
(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. (a) Coefficient of cooling and heating capacity in relation to temperatures Cooling Heating...
Page 185: Electrical Data
2.2.3 ELECTRICAL DATA (1) Electrical wiring Models SRK50HE-S1, 56HE-S1...
Page 186: Outline Of Operation Control By Microcomputer
2.2.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (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 187: Unit On/Off Button
Unit indication section RUN (HOT KEEP) light (green) • Illuminates during operation. Models All models • Brinks 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. ECONOMY light (orange) Illuminates during ECONOMY operation.
Page 188: Custom Cord Switching Procedure
(4) Custom cord switching procedure Jumper wire (J6) If two wireless remote controllers 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 controller using the following procedure.
Page 189: Comfortable Timer Setting
(6) Comfortable timer setting If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.
Page 190 (c) Thermostat operation The compressor and outdoor fan and turned on and off as shown below according to the temperature setting. Compressor Outdoor fan Room temp. Set temp. (d) Hot keep This function controls the indoor unit fan speed as shown below in accordance with the temperature sensed by the indoor heat exchanger sensor.
Page 191 (iii) Operation of functional 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 Run light during heating. Flashes Outdoor unit fan 4-way valve...
Page 192: Outline Of Cooling Operation
(8) Outline of cooling operation (a) 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 anomalous stop. components Indoor fan motor Flaps ON or OFF ON or OFF Stop position control...
Page 193: Outline Of Dehumidifying Operation
(9) Outline of dehumidifying operation (a) 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) (b) Start up operation C.D Block A.B Block...
Page 194: Outline Of Automatic Operation
(10) Outline of automatic operation (a) Determination of operation mode The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20 seconds, determines the operation mode and the room temperature setting correction value, and then begins in the automatic operation.
Page 195: Protective Control Function
(12) Protective control function (a) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) Operating conditions Indoor heat exchanger temperature sensor (detected with Th2) is lower than 2.5ºC. (ii) 10 minutes elapsed after the start of operation. (ii) Detail of frost prevention operation Compressor Indoor fan Protects the fan tap just before frost prevention control.
Page 196 (g) 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. (Run light : ON, Timer light : 5 time flash, outdoor unit LED : 5 time flash) Operation possible Abnormal stop...
Page 197: Application Data
2.2.5 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 of an installation done in error resulting in death or serious injury are listed in the WARNING section.
Page 198: Selection Of Location For Installation
(1) Selection of location for installation (a) Indoor unit Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. 4 cm Right (ii) A solid place where the unit or the wall will not vibrate. side 10 cm Left...
Page 199: Installation Of Indoor Unit
(2) Installation of indoor unit (a) Installation of installation board 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 Indoor unit Unit : mm checked.)
Page 200 (c) Preparation of indoor unit Mounting of connecting wires 1) Remove the lid. 2) Remove the wiring clamp. 3) Connect the connecting wire securely to the terminal block. Use cables for interconnection wiring to avoid loosening of the wires. Terminal block CENELEC code for cables.
Page 201 [Drain hose changing procedures] 1. Remove the drain hose. 2. Remove the drain cap. 3. Insert the drain cap. 4. Connect the drain hose. ¡Remove the drain hose, ¡Remove it with hand or ¡Insert the drain cap which was removed at ¡I n s e r t t h e d r a i n h o s e making it rotate.
Page 202: Installation Of Outdoor Unit
(3) Installation of outdoor unit (a) Installation of outdoor unit Make sure that sufficient space for installation and service is secured. (ii) Fix the leg sections of the unit on a firm base which will not play. Attach cushion pads, etc. between the unit and the mounting fixtures not to transmit vibration to the building. (iii) Attach a drain elbow, etc.
Page 203: Test Run
(c) Air purge Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak. (ii) Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below. (iii) Open manifold valve handle Lo to its full width, and perform vacuum or evacuation. Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads –...
Page 204: Precautions For Wireless Remote Controller Installation And Operation
(d) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (e) Make sure that drain flows properly. Standard operation data (220/230/240V) Model SRK50HE-S1 SRK56HE-S1 Item – – Cooling High pressure (MPa) Heating 2.6~2.8 2.8~3.0 Cooling 0.8~1.0...
Page 205: Maintenance Data
2.2.6 MAINTENANCE DATA (1) Troubleshooting procedures for electrical equipment (a) Cautions 1 If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an outdoor unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after discharging this electrical charge (to DC 10 V or lower).
Page 206 (d) Troubleshooting procedure (If the air conditioner runs) Confirm the contents of the customer complaint. The cause of the trouble can be specifically identified. Eliminate the cause of the trouble and perform an Check the self-diagnosis display. operation check. See page 205. Identify the faulty component by using the check procedure corresponding to the content of the trouble.
Page 207 (e) Self-diagnosis table When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of display lights. If the air conditioner is operated using the remote controller 3 minutes or more after the emergency stop, the trouble display stops and the air conditioner resumes operation.
Page 208 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 209 [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 206) Check if there are any Does trouble persist after Is sufficient quantity of refrigerant places where gas is leaking.
Page 210 [Compressor malfunction of Abnormality of outdoor unit insufficient gas (refrigerant)] Replace capacitor for compressor. Does compressor operation? Is capacitor for compressor normal? Is connector for compressor connection Correct connection good? Replace compressor. Is heat exchanger sensor volume for Replace heat exchanger sensor inside unit good? Check if there are any places where Is refrigerant amount normal?
Page 211 (ii) Indoor unit fan motor check procedure This is a diagnostic procedure for determining if the indoor unit’s fan motor or the circuit board is broken down. 1) Indoor unit printed circuit board output check a) Turn off the power. b) Remove the front panel, then disconnect the fan motor lead wire connector.
Page 212: Servicing
(2) Servicing (a) 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 213 CONTENTS 2.3.1 GENERAL INFORMATION ..............212 Specific features ................... 212 How to read the model name ............... 212 2.3.2 SELECTION DATA ................... 213 Specifications ..................213 Range of usage & limitations .............. 215 Exterior dimensions ................215 Piping system ..................217 Selection chart ..................
Page 214: General Information
(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 215: Selection Data
2.3.2 SELECTION DATA (1) Specifications Model SRK63HE-S1 (Indoor unit) SRC63HE-S1 (Outdoor unit) (220/230/240V) Model SRK63HE-S1 SRC63HE-S1 Item Cooling capacity 6300 Heating capacity 6700 Power source 1 Phase, 220-240V, 50Hz Cooling input 2.19 Running current (Cooling) 10.9/10.5/10.0 Heating input 1.85 Running current (Heating) 9.2/8.8/8.5 Inrush current Cooling: 2.88 Heating: 3.62...
Page 216 Model SRK71HE-S1 (Indoor unit) SRC71HE-S1 (Outdoor unit) (220/230/240V) Model SRK71HE-S1 SRC71HE-S1 Item Cooling capacity 7100 Heating capacity 7500 Power source 1 Phase, 220-240V, 50Hz Cooling input 2.21 Running current (Cooling) 11.0/10.6/10.1 Heating input 2.07 Running current (Heating) 10.3/9.9/9.5 Inrush current Cooling: 3.21 Heating: 3.62 Sound level...
Page 217: Range Of Usage & Limitations
(2) Range of usage & limitations Models All models Item Indoor return air temperature Cooling operation : Approximately 21 to 32˚C (Upper, lower limits) Heating operation : Approximately 15 to 30˚C Outdoor air temperature Cooling operation : Approximately 21 to 43˚C (Upper, lower limits) Heating operation : Approximately -5 to 21˚C Refrigerant line (one way) length...
Page 218 (b) Outdoor unit Model SRC63HE-S1 286.4 Drain holes Unit: mm 203.1 136.9 Elogated hole (2-12 x16) Terminal block 34.6 Ground terminal Service valve (Liquid) ø6.35 (1/4'') Service valve (Gas) ø12.7 (1/2'') Model SRC71HE-S1 Unit: mm Drain holes 2-ø15 25.8 29.8 87.9 Terminal block Service valve (Liquid)
Page 219: Piping System
(4) Piping system Model SRK63HE-S1 Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connecting Service valve temp. sensor (Gas) Piping Check joint (Gas) ø 12.7 Humidity 4 way valve accumulator sensor uffler Room temp. Heat sensor Heat exchanger Discharge pipe exchanger...
Page 220: Selection Chart
(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. (a) Coefficient of cooling and heating capacity in relation to temperatures Cooling Heating...
Page 221: Electrical Data
2.3.3 ELECTRICAL DATA (1) Electrical wiring Model SRK63HE-S1...
Page 222 Model SRK71HE-S1...
Page 223: Outline Of Operation Control By Microcomputer
2.3.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by remote control switch (a) 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 224 (b) Wired remote control (Optional parts) 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 225: Unit On/Off Button
(c) Unit indication section RUN (HOT KEEP) light (green) Models All models • 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. ECONO light (orange) Illuminates during ECONOMY operation.
Page 226: Custom Cord Switching Procedure
(4) Custom cord switching procedure If two wireless remote controls are installed in one room, in order to prevent wrong EXTERNAL INPUT WIRED REMOCON operation due to mixed signals, please modify the printed circuit board in the indoor OPE PERMISSION CUSTOM Jumper wire (J4) unit’s control box and the remote control using the following procedure.
Page 227: Comfortable Timer Setting
(6) Comfortable timer setting If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.
Page 228: Outline Of Heating Operation (Heat Pump Type Only)
(8) Outline of heating operation (Heat pump type only) (a) 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 anomalous stop. components Indoor fan motor Flap and louver ON or OFF...
Page 229 (e) Hot spurt For 40 minutes after a heating operation begins, the system runs with set temperature raised by 2ºC. (ii) In the following cases, this function is canceled and does not activate afterwards. 1) When the compressor and outdoor unit fan have been turned OFF by the thermostat going off. 2) During high pressure control operation.
Page 230: Outline Of Cooling Operation
(h) Forced defrost Forced defrost operation can be performed only once time within 20 second, after the power source is turned on, in accor- dance with the following operation. 2) Functional components operation 1) Remote control operation Operation Compressor Operation mode Heating 4-way valve Set temperature...
Page 231: Outline Of Dehumidifying Operation
(c) Thermostat operation The compressor and outdoor fan and turned on and off as shown below according to the temperature setting. Compressor Outdoor fan Room temp. Set temp. (d) HIGH POWER operation ( “HI POWER” button on the remote control : ON) The following operation is performed for 15 minutes without relation to the set temperature or fan speed setting.
Page 232: Outline Of Automatic Operation
(c) DRY operation After finishing start up operation described in (b) previous page, thermal dry operation is performed at 8 minutes intervals, according to the difference between room temperature and thermostat setting temperature as shown below. Beside, 1 cycle of this operating time consists of 8 minutes, 7 cycle operation is performed then. D Block C Block Compressor...
Page 233: Outline Of Fan Operation (Cooling Only Type Only)
(b) Within 30 minutes after either auto or manual operation stops, if auto operation is started, or if you switch to auto operation during manual operation, the system runs in the previous operation mode. (c) The temperature is checked 1 time in 30 minutes after the start of operation, and if the judgment differs from the previous operation mode, the operation mode changes.
Page 234: Stop Mode
(14) Stop mode When the complete stop command given, when When stoppage occurs due to thermostat operation, there is and abnormal stoppage command switching operations and protective function operations Functional Operation Cooling,cooling Heating,heating Cooling,cooling Heating,heating components oriented dehumidifying oriented dehumidifying oriented dehumidifying oriented dehumidifying 3 min.
Page 235: External Control (Remote Display)/Control Of Input Signal
(15) External control (remote display)/control of input signal Make sure to connect the wired remote control unit. Control of input signal is not available without the wired remote control unit. (a) External control (remote display) output Following output connectors (CNT) are provided on the printed circuit board of indoor unit. Operation output: Power to engage DC 12V relay (provided by the customer) is outputted during operation.
Page 236: Operation Permission/Prohibition Control
(16) Operation permission/prohibition control 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. (a) The operation mode is switched over between Permission and Prohibition by releasing the jumper wire (J3) on the indoor control board.
Page 237 (b) Dew condensation prevention control [Cooling (including automatic), cooling oriented dehumidifying operation] Operating condition: When the following conditions are met after 5 minutes or more of continuous operation after operation starts. Prevention control • The humidity sensor value is 68% or higher (ii) Operation contents Reset 1) Command of the electronic expansion valve.
Page 238 (g) 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. (Run light : ON, Timer light : 5 time flash) Operation possible Abnormal stop...
Page 239: Application Data
2.3.5 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 of an installation done in error resulting in death or serious injury are listed in the WARNING section.
Page 240: Selection Of Location For Installation
(1) Selection of location for installation (a) Indoor unit Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (ii) A solid place where the unit or the wall will not vibrate. 6.5 cm Right (iii) A place where there will be enough space for servicing.
Page 241: Installation Of Indoor Unit
(2) Installation of indoor unit (a) Installation of installation board 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 checked.) Unit: mm Mating mark for level surface...
Page 242 (c) Preparation of indoor unit Mounting of connecting wires 1) Open the air inlet panel. 2) Remove the lid. 3) Remove the wiring clamp. 4) Connect the connecting wire securely to the terminal block. Use cables for interconnection wiring to avoid loosening of the wires.
Page 243 [Drain hose changing procedures] 1. Remove the drain hose. 2. Remove the drain cap. 3. Insert the drain cap. 4. Connect the drain hose. ¡Remove the drain hose, ¡Remove it with hand or ¡Insert the drain cap which was removed at ¡I n s e r t t h e d r a i n h o s e making it rotate.
Page 244: Installation Of Outdoor Unit
(3) Installation of outdoor unit (a) Installation of outdoor unit Make sure that the unit is stable in installation. Fix the unit to stable base. (ii) 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, etc.
Page 245: Test Run
(c) Air purge Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak. (ii) Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below. (iii) Open manifold valve handle Lo to its full width, and perform vacuum or evacuation. Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads –...
Page 246: Precautions For Wireless Remote Control Installation And Operation
(d) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (e) Make sure that drain flows properly. Standard operation data (220/230/240V) Model SRK63HE-S1 SRK71HE-S1 Item – – Cooling High pressure (MPa) High pressure (MPa) Heating 2.37 2.62...
Page 247: Installation Of Wired Remote Control And Super Link Adapter (Sc-Ad-E) (Optional Parts)
(7) Installation of wired remote con- (iv) Cut the jumper attached on the board. trol and super link adapter (SC-AD- • Remove the upper box. Remove the screw, the latch and the band. E) (Optional parts) (a) Modifying the indoor unit’s printed circuit Screw Band board...
Page 248 (b) Installation of wired remote control (Optional 2) Recessed fitting parts) a) The Electrical box and remote control (shield (i) Selection of installation location wire must be use in case of extension) are Avoid the following locations first embedded. 1) Direct sunlight. 2) Close to heating device.
Page 249 (c) 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 250 (ii) 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 251 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 252 (iv) Changing the remote control’s temperature setting range 1) The temperature setting range of the remote controller can be changed. Through remote controller button operations, the upper limit and lower limit set temperature values can be changed individually. 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 253 (d) SUPER LINK ADAPTER (SC-AD-E) (i) 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 254: Maintenance Data
2.3.6 MAINTENANCE DATA (1) Troubleshooting procedures for electrical equipment (a) Cautions 1 If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an outdoor unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after discharging this electrical charge (to DC 10 V or lower).
Page 255 (d) Troubleshooting procedure (If the air conditioner runs) Confirm the contents of the customer complaint. The cause of the trouble can be specifically identified. Eliminate the cause of the trouble and perform an Check the self-diagnosis display. operation check. See page 254. Identify the faulty component by using the check procedure corresponding to the content of the trouble.
Page 256 (e) Self-diagnosis table When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of display lights. If the air conditioner is operated using the remote control 3 minutes or more after the emergency stop, the trouble display stops and the air conditioner resumes operation.
Page 257 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 258 [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 255) Check if there are any Does trouble persist after Is sufficient quantity of refrigerant places where gas is leaking.
Page 259 [Compressor malfunction of Abnormality of outdoor unit insufficient gas (refrigerant)] Replace capacitor for compressor. Does compressor operation? Is capacitor for compressor normal? Is connector for compressor connection Correct connection good? Replace compressor. Is heat exchanger sensor resistance Replace heat exchanger sensor value good? Check if there are any places where Is refrigerant amount normal?
Page 260 (ii) Indoor unit fan motor check procedure This is a diagnostic procedure for determining if the indoor unit’s fan motor or the circuit board is broken down. 1) Indoor unit printed circuit board output check a) Turn off the power. b) Remove the front panel, then disconnect the fan motor lead wire connector.
Page 261: Servicing
(2) Servicing (a) 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 262 MEMO...
Page 263 3. WALL MOUNTED TYPE ROOM AIR-CONDITIONER Split system, air cooled cooling only type 3.1 SRK20CD-S1 SRK20CC-S1 SRK28CD-S1 SRK28CC-S1 SRK40CD-S1 SRK40CC-S1 ........262 3.2 SRK50CE-S1 SRK56CE-S1 ............276 3.3 SRK63CE-S1 SRK71CE-S1 ............285...
Page 264 CONTENTS 3.1.1 GENERAL INFORMATION ..............263 Specific features ................... 263 How to read the model name .............. 263 3.1.2 SELECTION DATA ................... 264 Specifications ..................264 Range of usage & limitations .............. 270 Exterior dimensions ................270 Piping system ..................272 Selection chart ..................
Page 265: General Information
(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 equip- ment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
Page 266: Selection Data
3.1.2 SELECTION DATA (1) Specifications Model SRK20CD-S1 (Indoor unit) SRC20CD-S1 (Outdoor unit) (220/230/240V) Model SRK20CD-S1 SRC20CD-S1 Item Cooling capacity 2050 Power source 1 Phase, 220–240V, 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...
Page 267 Model SRK28CD-S1 (Indoor unit) SRC28CD-S1 (Outdoor unit) (220/230/240V) Model SRK28CD-S1 SRC28CD-S1 Item Cooling capacity 2550 Power source 1 Phase, 220–240V, 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 268 Model SRK40CD-S1 (Indoor unit) SRC40CD-S1 (Outdoor unit) (220/230/240V) Model SRK40CD-S1 SRC40CD-S1 Item Cooling capacity 3600 Power source 1 Phase, 220–240V, 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...
Page 269 Model SRK20CC-S1 (Indoor unit) SRC20CC-S1 (Outdoor unit) (220/230/240V) Model SRK20CC-S1 SRC20CC-S1 Item Cooling capacity 2050 Power source 1 Phase, 220–240V, 50Hz Cooling input 0.63 Running current (Cooling) 3.1/3.0/2.9 Inrush current 18.9 Cooling: 3.21 Sound level Cooling Noise level Power level Exterior dimensions 250 ×...
Page 270 Model SRK28CC-S1 (Indoor unit) SRC28CC-S1 (Outdoor unit) (220/230/240V) Model SRK28CC-S1 SRC28CC-S1 Item Cooling capacity 2550 Power source 1 Phase, 220–240V, 50Hz Cooling input 0.79 Running current (Cooling) 3.9/3.7/3.5 Inrush current 17.2 Cooling: 3.21 Sound level Cooling Noise level Power level Exterior dimensions 250 ×...
Page 271 Model SRK40CC-S1 (Indoor unit) SRC40CC-S1 (Outdoor unit) (220/230/240V) Model SRK40CC-S1 SRC40CC-S1 Item Cooling capacity 3600 Power source 1 Phase, 220–240V, 50Hz Cooling input 1.12 Running current (Cooling) 5.3/5.1/4.9 Inrush current 25.2 COP (Cooling) Cooling: 3.21 Sound level Cooling Noise level Power level Exterior dimensions 250 ×...
Page 272: Range Of Usage & Limitations
(2) Range of usage & limitations Models All models Item Indoor return air temperature Cooling operation : Approximately 21 to 32˚C (Upper, lower limits) Outdoor air temperature Cooling operation : Approximately 21 to 43˚C (Upper, lower limits) Refrigerant line (one way) length Max.
Page 273 Models SRK20CC-S1, 28CC-S1, 40CC-S1 Unit: mm Piping hole right (left) Therminal block 117.5 117.5 216.5 216.5 148.5 148.5 216.5 216.5 14.5 67.5 53.5 Piping for Gas 20.28: ø9.52 ø12.7 397.1 Piping for Liquid 465.1 (ø6.35) Drain hose 540 (ø16) VIEW A Piping hole (ø65) Piping hole...
Page 274: Piping System
Models SRC40CD-S1, 40CC-S1 286.4 Drain hole 203.1 Elogated hole 136.9 (2-12 x16) Terminal block 34.6 Ground terminal Service valve (Liquide) ø6.35 (1/4'') Service valve (Gas) ø12.7 (1/2'') (4) Piping system Models SRK20CD-S1, 28CD-S1, 20CC-S1, 28CC-S1 Indoor unit Outdoor unit Cooling cycle Outdoor air Flare connecting Service valve...
Page 275: Selection Chart
Models SRK40CD-S1, 40CC-S1 Indoor unit Outdoor unit Cooling cycle Outdoor air Flare connecting Service valve temp. sensor (Gas) Piping Check joint (Gas) ø12.7 Accumulator Room temp. Discharge temp. Heat sensor Heat sensor exchanger exchanger sensor Heat Compressor exchanger Heat exchanger sensor Service valve (Liquid) Piping...
Page 276: Electrical Data
3.1.3 ELECTRICAL DATA (1) Electrical wiring Models SRK20CD-S1, 28CD-S1, 40CD-S1, 20CC-S1, 28CC-S1, 40CC-S1...
Page 277: Outline Of Operation Control By Microcomputer
3.1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER Except for function relating to heating, same at the for SRK heat pump modes. Refer to Page 151. 3.1.5 APPLICATION DATA The application data for the cooling only models are similar to those for the heat pump models. Refer to Page 162. 3.1.6 MAINTENANCE DATA Same at the cooling/heating equipment SRK heat pump models.
Page 278 CONTENTS 3.2.1 GENERAL INFORMATION ..............277 Specific features ................... 277 How to read the model name .............. 277 3.2.2 SELECTION DATA ................... 278 Specifications ..................278 Range of usage & limitations .............. 280 Exterior dimensions ................280 Piping system ..................281 Selection chart ..................
Page 279: General Information
(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 equip- ment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
Page 280: Selection Data
3.2.2 SELECTION DATA (1) Specifications Model SRK50CE-S1 (Indoor unit) SRC50CE-S1 (Outdoor unit) (220/230/240V) Model SRK50CE-S1 SRC50CE-S1 Item Cooling capacity 4700 Power source 1 Phase, 220-240V, 50Hz Cooling input 1.41 Running current (Cooling) 6.5/6.3/6.0 Inrush current 39.6 Cooling: 3.33 Sound level Hi 43, Me 39, Lo 34 Cooling Noise level...
Page 281 Model SRK56CE-S1 (Indoor unit) SRC56CE-S1 (Outdoor unit) (220/230/240V) Model SRK56CE-S1 SRC56CE-S1 Item Cooling capacity 5100 Power source 1 Phase, 220-240V, 50Hz Cooling input 1.59 Running current (Cooling) 7.3/7.1/6.8 Inrush current 45.2 Cooling: 3.21 Sound level Hi 44, Me 40, Lo 35 Cooling Noise level Power level...
Page 282: Range Of Usage & Limitations
(2) Range of usage & limitations Models All models Item Indoor return air temperature Cooling operation : Approximately 21 to 32˚C (Upper, lower limits) Outdoor air temperature Cooling operation : Approximately 21 to 43˚C (Upper, lower limits) Refrigerant line (one way) length Max.
Page 283: Piping System
(b) Outdoor unit Models All models 286.4 Drain holes 203.1 136.9 Elogated hole (2-12 x16) Terminal block 34.6 Ground terminal Service valve (Liquid) ø6.35 (1/4'') Service valve (Gas) ø12.7 (1/2'') (4) Piping system Models SRK50CE-S1, 56CE-S1 Indoor unit Outdoor unit Cooling cycle Muffler Outdoor air...
Page 284: Selection Chart
(5) Selection chart Correct the cooling capacity in accordance with the conditions as follows. The net cooling capacity can be obtained in the following way. Net capacity = Capacity shown on specification ✕ Correction factors as follows. (a) Coefficient of cooling capacity in relation to temperatures Cooling Applicable range Indoor air W.B.
Page 285: Electrical Data
3.2.3 ELECTRICAL DATA (1) Electrical wiring Models SRK50CE-S1, 56CE-S1...
Page 286: Outline Of Operation Control By Microcomputer
3.2.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER Except for function relating to heating, same at the for SRK heat pump models. Refer to Page 184. 3.2.5 APPLICATION DATA The application data for the cooling only models are similar to those for the heat pump models. Refer to Page 195. 3.2.6 MAINTENANCE DATA Same at the cooling/heating equipment SRK heat pump models.
Page 287 CONTENTS 3.3.1 GENERAL INFORMATION ..............286 Specific features ................... 286 How to read the model name ............... 286 3.3.2 SELECTION DATA ................... 287 Specifications ..................287 Range of usage & limitations .............. 289 Exterior dimensions ................289 Piping system ..................291 Selection chart ..................
Page 288: General Information
(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 equip- ment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
Page 289: Selection Data
3.3.2 SELECTION DATA (1) Specifications Model SRK63CE-S1 (Indoor unit) SRC63CE-S1 (Outdoor unit) (220/230/240V) Model SRK63CE-S1 SRC63CE-S1 Item Cooling capacity 6300 Power source 1 Phase, 220-240V, 50Hz Cooling input 2.19 Running current (Cooling) 10.9/10.5/10.0 Inrush current Cooling: 2.88 Sound level Hi 44, Me 40, Lo 37 Cooling Noise level Power level...
Page 290 Model SRK71CE-S1 (Indoor unit) SRC71CE-S1 (Outdoor unit) (220/230/240V) Model SRK71CE-S1 SRC71CE-S1 Item Cooling capacity 7100 Power source 1 Phase, 220-240V, 50Hz Cooling input 2.21 Running current (Cooling) 11.0/10.6/10.1 Inrush current Cooling: 3.21 Sound level Hi 45, Me 41, Lo 38 Cooling Noise level Power level...
Page 291: Range Of Usage & Limitations
(2) Range of usage & limitations Models All models Item Indoor return air temperature Cooling operation : Approximately 21 to 32˚C (Upper, lower limits) Outdoor air temperature Cooling operation : Approximately 21 to 43˚C (Upper, lower limits) Refrigerant line (one way) length Max.
Page 292 (b) Outdoor unit Model SRC63CE-S1 286.4 Drain holes Unit: mm 203.1 136.9 Elogated hole (2-12 x16) Terminal block 34.6 Ground terminal Service valve (Liquid) ø6.35 (1/4'') Service valve (Gas) ø12.7 (1/2'') Model SRC71CE-S1 Unit: mm Drain holes 2-ø15 25.8 29.8 87.9 Terminal block Service valve (Liquid)
Page 293: Piping System
(4) Piping system Models SRK63CE-S1, 71CE-S1 Indoor unit Outdoor unit Cooling cycle Outdoor air Flare connecting temp. sensor Service valve (Gas) Piping Muffler (Gas) Check joint ø 12.7 15.88 ø Humidity sensor accumulator Room temp. Heat Discharge pipe sensor Heat exchanger temp.
Page 294: Electrical Data
3.3.3 ELECTRICAL DATA (1) Electrical wiring Model SRK63CE-S1...
Page 295 Model SRK71CE-S1...
Page 296: Outline Of Operation Control By Microcomputer
3.3.4 OUTLINE OF OPERATION CONTROL BY MICROCOM- PUTER Except for function relating to heating, same at the for SRK heat pump models. Refer to Page 221. 3.3.5 APPLICATION DATA The application data for the cooling only models are similar to those for the heat pump models. Refer to Page 237. 3.3.6 MAINTENANCE DATA Some at the cooling/heating equipment SRK heat pump models.
Page 297 INVERTER 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...

Mitsubishi Heavy Industries SRK20ZD-S1 Technical Manual

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