Mitsubishi Heavy Industries Air Conditioners Technical Manual Manual Number: 2011 No. W2-01 Variable Frequency Wall Mounted Type Room Air Conditioners (Split system, heat pump type) SRK20MA-S/SRC20MA-S SRK25MA-S/SRC25MA-S SRK35MA-S/SRC35MA-S SRK50MA-S/SRC50MA-S (R410A Refrigerant Used) MITSUBISHI HEAVY INDUSTRIES, LTD.
Table of Contents 1. GENERAL INFORMATION…………..……………………….……1 1.1 Features……………………………………..……………………..…1 1.2 Model identification………………………………………………1 2 MODEL SELECTION…………………………………………………2 2.1 Model function..…………..…….……..………………………..……2 2.2 Range of usage……………………………………………..………6 2.3 Outline drawing……………………………..……………………..…6 2.4 Cooling cycle system diagram…….………………..…………...…8 2.5 Performance curve……………………………………………………9 3 ELECTRICAL WIRING DIAGRAM……………………………….10 4 NAME OF EACH PART AND ITS FUNCTION………….12 4.
4.18 Outline of drying operation..................................................21 4.19 Outline of defrosting operation.................................................21 4.20 Outline of vertical and horizontal flaps control................................23 4.21 Outline of electronic expansion valve (EEV) control.....................24 4.22 Outline of compressor control.........................................24 4.23 Outline of outdoor fan control.........................................24 4.
1 GENERAL INFORMATION 1.1 Features (1) Inverter ● Heating/cooling The rotate speed of the compressor is changed steplessly in relation to varying load, and is linked with the fans of indoor and outdoor units controlled by the changes of frequency, thus controls the power. ● Allowing quick heating/cooling operation during start-up period. The room temperature is kept constant through fine-tuned control after the machine is stabilized.
2 MODEL SELECTION 2.1 Model function 2.1.
2.1.
2.1.2 Model: SRK35MA–S (Indoor unit) SRC35MA–S (Outdoor unit) Item Unit Indoor unit SRK35MA–S Net weight Machine dimension Package dimension Color Fan Outdoor unit SRC35MA–S kg mm 10.
2.1.2 Model: SRK50MA–S (Indoor unit) SRC50MA–S (Outdoor unit) Item Unit Indoor unit SRK50MA–S Net weight Machine dimension Package dimension Color Fan Air flow Noise in cool room Noise in warm room Fan motor Power of motor Power of electric control Power supply and power cord Heat exchanger Outdoor unit SRC50MA–S kg mm 10.
2.2 Range of usage Please use the air conditioners within the following range of usage, otherwise the protector will be triggered. Cooling Operation Outdoor temperature Indoor temperature Indoor humidity Heating Operation About 18℃~43℃ About -15~24℃ About18℃~32℃ About below 30℃ About below 80% 20~50 Models Max.
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(2) Outdoor unit: SRC20MA-S/ SRC25MA-S/ SRC35MA-S Unit: mm Drainage pipes Junction box Operation valve (Liquid) Flare connecting Operation valve (Gas) Flare connecting (3) Outdoor unit: SRC50-MA-S Unit: mm Drain holes Terminal block Operation valve (Liquid) Flare connecting Operation valve (Gas) Flare connecting -8-
2.4 Cooling cycle system diagram Models: MA-S Series Indoor unit Outdoor unit Circulation of cooling Circulation of heating Operation valve (Gas) Flare connecting Outdoor air temp. sensor Gas pipe Note (1) Air heat exchanger Inlet air temp.
Cooling operation Outdoor air D.B. temperature Heating operation Indoor air D.B. temperature Correction factor of cooling & heating capacity in relation to temperature 2.5 Performance curve The cooling and heating capacities are measured in the following conditions. The actual capacity can be obtained with the following formula. Actual capacity = Rating capacity x Correction factor (1) Capacity correction according to indoor and outdoor temperatures: Cooling Heating Accommodation Indoor air W.B.
Nominal cooling Temp. correction capacity factor Actual heating capacity = 5800 x 0.81 x Nominal heating capacity Temp. correction factor - 11 - Piping length correction factor 0.95 x 0.
3 ELECTRICAL WIRING DIAGRAM 3.
3.
4 NAME OF EACH PART AND ITS FUNCTION 4.1 Name of each part Indoor unit Air inlet panel Suctions Draws in airthe in indoor the room air. Indication section of A/C and signal receiver of remote controller Wireless remote controller Air filter Removes dust or dirt from the inlet air filtere Page 19 Filter filtere Room temperature detector filtere Indoor fan filtere Power switch filtere Vent Air blows from here.
Indication section of air conditioner RUN lamp (green) ON during running Heat-retaining 1.5 sec. Running Stop 0.5 sec. TIMER lamp (yellow) ON during timing operation HI POWER/JET lamp (green) ON during HI POWER/JET running POWER SAVE lamp (green) Receiving part of remote controller ON during Power Save running Receives signals from remote controller Temp. displaying lamp (olivine) ON/OFF button Press this button to begin running; press it again to stop running.
Operation and indication section for remote control Operation section FAN SPEED button MODE button Each time this button is pressed, ■ displaying changes in order. Each time this button is pressed, ■ displaying changes in order. ON/OFF (luminous) button HI POWER button Press this button to begin running; press it again to stop running. This button is used to change the HI POWER mode. Up/Down air direction button TEMP button Press this button and the air flap begins to swing upwards and downwards.
4.2 Emergency switch: (1) When the remote controller is not used, the emergency operation switch “ON/OFF” button can be used to turn on/off the machine. (2) Press the “ON/OFF” button to begin operation. Press it again to stop. (3) Operation items: ● Operating mode: Automatic ● Fan speed: Automatic ON/OFF button of the equipment ● Air direction: Automatic (4) Note: Press and hold it for over 5 seconds to set to the cooling mode automatically. 4.
4.6 SLEEP operation: (1) SLEEP operation: This function prevents the temperature in the cooling operation from becoming too low and the temperature in the heating operation from becoming too high; regulates the room temperature automatically as time goes by; and stops automatically after the time set. Sleep (2) Operation method: timing ① If the SLEEP button is pressed during the operation of the air conditioner, and the run time, such as , will appear.
4.8 Timing ON: (1) Timing ON: The air conditioner begins to detect the room temperature 60 minutes before the set time and commences operation 5-60 minutes in advance according to the difference between the room temperature and the set temperature to make the room temperature reach the best value at the set time. (2) Operation method: ① To set the Timing ON operation, whether the air conditioner is running is not considered.
4.10 Current time setting: (1) After inserting the batteries, the current time is set to 13:00 automatically. In time setting, all contents displayed on the remote controller are reset. ON/OFF (2) Operation method: For example, to set to 11:30, ① Step 1: Use the pen point to press the ACL switch and the ACL TIMER lamp will flash.
4.13 POWER SAVE operation: (1) The Power Save function regulates the frequency of the compressor, etc. and reduces the current value during operation, thus reduces the cooling/heating capacity to save energy. (2) Operation method: Point the remote controller at the air conditioner and use the Power pen point to press the POWER SAVE button to make point at Power Save Save . The Power Save operation is enabled.
4.15 Area setting: (1) The area setting function is used to regulate the indoor air and the air in the specific area in the room. (2) Operation method: When the air conditioner is running, press the AREA button, as needed, to switch to the desired area. (3) The area indications are as follows: Area Area setting setting (Central) (Central) (Bottom left) (Top left) (Full) (Top right) (Bottom right) (4) Cancelation: Press the Up/Down or Left/Right button to regulate the air direction.
(3) If the air conditioner is started again within 1 hour after the automatic operation stops, or it is converted to automatic operation in the heating, cooling or drying mode, it will operate in the previous mode. (4) The temperature can be set in the following range.
② The outdoor heat exchanger sensor (Th0-R) meets one of the following conditions: A) When the actual rotate speed of the compressor N ≥ 62 rps: Th0-R ≤ -5℃; B) When the actual rotate speed of the compressor N < 62 rps: Th0-R ≤ -4℃; ③ Outdoor air temp. sensor (Th0-A): Th0-A ≤ 3℃; ④ The compressor runs for over 7 minutes continuously.
4.20 Outline of vertical and horizontal flaps control: (1) Overview: Sm1: Vertical flap (mounted on the right side when you face the appliance); Sm2: Left horizontal flap (mounted on the left side when you face the appliance); Sm3: Right horizontal flap (mounted on the right side when you face the appliance); (2) Vertical flap Sm1: The level set is 0℃.
4.21 Outline of electronic expansion valve (EEV) control: (1) Overview: ① Initial control: When the power is ON and the reference position is determined, the EEV opening is widened within 5 minutes to let the refrigerant return, thus makes the low pressure rise easily and avoid misdiagnosis of insufficient refrigerant and poor EEV operation as the low pressure can’t rise after decline; ② Open loop control: After the initial control, when the temperature measured by the sensor, etc.
(2) Priority of rotate speed control: Error response control > Outdoor fan control in compressor soft start control > Outdoor fan control in defrosting control > Outdoor fan control/indoor forcing outdoor fan running control in stop mode > Outdoor fan control at start > Outdoor fan control at the low outdoor temperature in cooling > Outdoor fan control under overload in cooling > Delayed speed position switching > Outdoor fan control under overload in heating > Speed position control (3) Error response cont
Speed position of indoor fan (7) The relationship between the rotate speed of heat-retaining during heating and the temperature measured by the indoor heat exchanger sensor Th1-R1 is as follows: Temperature measured by the indoor heat exchanger sensor When the compressor displays OFF When the compressor displays ON - 28 -
5 Installation Precautions for installation ○ Use this system only for household and residence. ○ This appliance must be installed according to the national wiring regulation. ○ A 2-level switch must be used for the fixed wiring of the power supply and its disconnection clearance must be at least 3mm. ○ If the outdoor unit may tip over or move and drop from the original installation location, use trip bolts or string to secure it in place.
WARNING • To recover refrigerant, stop the compressor before closing the valve and disconnecting the refrigerant piping.
CAUTION • Do not install the outdoor unit in the locations listed • Do not install the outdoor unit in a location where below. insects and small animals can inhabit. • Locations where discharged hot air or operating sound of Insects and small animals can enter the electric parts and the outdoor unit can bother neighborhood. cause damage or fire. Instruct the user to keep the • Locations where outlet air of the outdoor unit blows surroundings clean.
Selection of installation location ○ The appliance must be installed at a location with the vents and air intake being 10cm away from walls. (In case the fence is 1.2m or above in height, or is overhead, the sufficient space between the unit and wall shall be secured.) ○ When the unit is installed, the space of the following dimension shall be secured. Air intake 10cm MIN 10cm MIN Caution If the wall is 1.
Installation of indoor unit Drilling holes and securing sleeve (optional) Drilling a hole with Φ65 whole core drill Adjusting the length of the sleeve Top Outdoor Indoor Thickness of wall ○ If the rear pipe is pulled out, cut the lower part and right side of the axle collar Use the whole core drill to drill a hole. Mounting the sleeve. Sleeve Declined plate Sealing ring Putty Indoor Turn to tighten Outdoor Insert the sleeve.
Mounting pipe support ● Precautions for connection to the left and to center/rear [Top view] Pipe shaping Connecting the pipe to the left Connecting the pipe to the left rear Pipe Connecting the pipe to the left Drainage pipe Connecting the pipe to the right The pipe can be connected to the rear, left, left rear, bottom left, right or bottom right.
Drainage pipe ○ Mount the drainage pipe at a downward angle. ○ Avoid the following drainage pipe connections. After all mounting steps, check whether the drain is proper. Otherwise, water leakage may occur.
Flaring Model Copper pipe diameter Measurement B Flaring block Copper pipe Measurement B Conventional (R22) flare tool Clutch type flare tool for R410A Clutch type Wing nut type Use a flare tool designed for R410A or a conventional flare tool. Please note that measurement B (protrusion from the flaring block) will vary depending on the type of flare tool in use.
Moving or removing the appliance ○ In order to meet the requirement of environmental protection, pump down (recovering refrigerant) is required. ○ The effect of pump down is to return the refrigerant from the indoor unit to the outdoor unit when the pipes are removed from the main frame. (Pump down method) ①Connect the charge hose to the service port. ②Liquid side: Close the liquid valve with a hexagon wrench.
5.6 Standard running data: SRK20MA-S SRK25MA-S SRK35MA-S SRK50MA-S Cooling - - - - Heating 2.2~2.9 2.2~2.9 2.0~3.2 2.4~3.6 Cooling 1.0~1.2 1.0~1.2 0.9~1.2 0.8~1.2 Heating - - - - Temp. difference Cooling 9~10 9~11 8~14 10~16 between inlet and Heating 9~15 9~16 10~21 10~22 Cooling 1.4~4.1 1.4~6.0 1.3~6.6 2.0~10.8 Heating 1.7~5.6 1.7~6.1 1.7~6.6 2.0~13.
6. MAINTENANCE 6.1 Electrical parts failure diagnosis method (1) Precautions: ① Be sure to switch off the power before disassembling and checking the air conditioner. Maintenance of the indoor unit should commence 1 minute after the power is switched off. With respect to maintenance of the outdoor unit, the major circuit (electrolytic capacitor), which may be charged, should be fully discharged before the maintenance.
* Correct voltage refers to the voltage between 198-242V. Procedure of diagnosis (when the air conditioner does not run at all) Has the cable been inserted into the power supply with correct voltage? No Check that the cable is inserted into the correct power supply. Check the operation situation. Yes Switch off the power supply and open the flap manually.
(4) Procedure of failure diagnosis (when the air conditioner can run) Note: (1) When only stop data is indicated, the air conditioner is normal. However, when the same protection is triggered repeatedly (more than 3 times), which becomes the user’s complaint, it should be judged according to the content of failure. Confirm the content of failure of the user’s air conditioner. No Is the cause of error confirmed? Confirm the displaying of self-diagnosis.
(5) Indication of self-diagnosis When the air conditioner stops abnormally, the cause is indicated with lamps. Three minutes after abnormal stop, use the remote controller to start the appliance. The error indication will disappear and the appliance will commence operation(2). Note: (2) It can’t be restarted with the remote controller 3 minutes after abnormal stop. The abnormal stop disappears when the power of the air conditioner is switched off. Indoor indication RUN lamp TIMER lamp Temp.
(6) Service mode (failure mode reading function) The air conditioner records the past error indication and protection stops (service data). If the indication of self-diagnosis can’t be confirmed, it can be confirmed through service data to grasp the condition when the error occurs.
*3: Counting of flashing in service mode: 1.5 sec. light-up (beginning signal) and number of continuous flashes (Number of continuous flashes excluding the 1.5 sec. light-up (beginning signal)). ● Safe current (heating safety I) (for example, the stop code is “32”) RUN lamp (tens place) flashes 3 times and TIMER lamp (ones place) flashes 2 times: 3 x 10 + 2 x 1 = 32. The code 32 “Safe current (heating safety I)” can be read from the list. 1.5 sec. RUN lamp (tens place) 0.5 sec. 0.5 sec.
② Stop data Settings of remote controller Operation Air flow Temperature switching switching setting Cooling Lo 21℃ 22℃ 23℃ 24℃ 25℃ 26℃ 27℃ 28℃ 29℃ 30℃ Indication data Indicates the cause of the last stop due to protection control, etc. (stop code) Indicates the cause of second to last stop due to protection control, etc. (stop code) Indicates the cause of third to last stop due to protection control, etc. (stop code) Indicates the cause of fourth to last stop due to protection control, etc.
Flash 7 times 37 Heating safe current III +3A Excessive refrigerant Compressor lock - 46 - Safe current stops in the safe current III+3A mode during heating operation.
No.
Notes: (1) The number of flashes in service mode excludes the 1.5 sec. light-up (beginning signal). (See the following example.) ● Safe current (heating safety I) (for example, the stop code is “32”) RUN lamp (tens place) flashes 3 times and TIMER lamp (ones place) flashes 2 times: 3 x 10 + 2 x 1 = 32. The code 32 “Safe current (heating safety I)” can be read from the list. 1.5 sec. RUN lamp (tens place) 0.5 sec. 0.5 sec. TIMER lamp (ones place) 11 sec.
(e) List of temperatures measured by room temperature sensor, indoor heat exchanger sensor, outdoor air temp. sensor, and outdoor heat exchanger liquid pipe sensor Unit: ℃ TIMER lamp (ones place) Does the buzzer sound? (Sound means negative) RUN lamp (tens place) Yes (Sounds for 0.1 sec.
0.1 sec. When the temperature is < 0, the buzzer will sound. When the temperature is ≥ 0, the buzzer will not sound. Sound of buzzer (Negative) 1.5 sec. RUN lamp (tens place) 0.5 sec. 0.5 sec. TIMER lamp (ones place) 11 sec.
(f) List of temperatures of compressor vent-pipe Unit: ℃ TIMER lamp (ones place) RUN lamp (tens place) Does the buzzer sound? (Sound means negative) Yes (Sounds for 0.1 sec.
Check data recording sheet Customer Date Equipment name Complaint Settings of remote controller Temp.
(7) Check method according to the content of failure Error of sensor (Wire break of sensor and poor joint contacting) No Is the joint contacting normal? Correct the plug/socket (replace the joint) Yes Is the resistance value of the sensor normal? No Replace the sensor. Yes Replace the PCB. ● List of temperatures and resistance properties of sensor Temp. (℃) Resistance(KΩ) Temp.
Error of outdoor unit (Damage of power transistor, wiring break of compressor) Has all three-phase output voltage been applied to the power transistor? No Failure of inverter Yes Has the wiring for the compressor been properly connected? No Connect it properly. Yes Check the compressor.
Serial signal transmission error (Wrong power supply and signal cable connection, failure of indoor and outdoor PCB, error of power supply system) Is the power supply abnormal in operation after reset? No Failure caused by one-time reason (noise, etc.
Outdoor fan motor error (Failure of fan motor, failure of outdoor PCB) No Is the connection of the connector normal? Correct the connector. Yes Has voltage been applied to the fan motor? No Failure of outdoor PCB Yes Failure of fan motor (8) Actions in case of short circuit and wire break of sensor (a) Indoor unit Actions Short circuit Wire break Become the compressor continuous No compressor operation instruction Cooling Room operation instruction obtained temp.
(9) Check method for indoor electrical components Is the fuse (3.15A) intact? No Replace the fuse. Yes Has voltage been applied to between terminal block 1~2 (AC220/230/240V)? No Replace the PCB. Yes Dose the voltage between terminal block 2~3 fluctuate between DC 0~12V? No Replace the PCB. Notes: (1) Communication is sent only when 52C is ON, so please check the operation status. (2) Measure voltage on the terminal block.
(11) Remote controller failure diagnosis procedure Note (1) Is the remote controller normal after reset? No ●Low battery of remote controller ● Defective remote controller Replace Yes Restart Does the air conditioner operate? Yes Note (1) (a) Press the ACL switch on the remote controller. (b) If the set temperature displayed is 0℃ and the current time displayed is 12:00, it indicates there are no obvious problems.
(12) Check method for outdoor unit 1) Circuit diagram of 20, 25 and 35MA-S outdoor units - 59 -
2) Circuit diagram of 50MA-S outdoor unit - 60 -
(13) Check method for outdoor circuit board (inverter) Make confirmation after checking that the indoor circuit board is normal. (I) Use a multimeter to conduct inspection. a) Unplug the plug. b) Remove the output cables U, V and W (to the compressor) of the power transistor. (Note: The inspection of inverter can be conducted only after the capacitor is discharged and after making sure the residual voltage is below 10V.) c) Insert the plug and press and hold the back-up switch for over 5 sec.
(14) Check method for EEV After the power is switched on, check the opening of the EEV and the sound and voltage within 10 sec. of operation. [In operation, only the opening is changed and the voltage can’t be measured.] 1) If sound of the EEV is heard, it indicates the EEV is basically good. 2) If no sound of the EEV is heard, measure the output voltage. 1 or 2 EEV About 5V for about 10 sec.
6.2 Servicing (1) Evacuation Evacuation refers to the process of purging non-condensable gas, air, water, etc. from the refrigerant equipment with a vacuum pump. The R410A refrigerant is highly water insoluble, therefore even a little water left in the refrigerant equipment will be frozen, which causes the so-called water blockage.
7 Service Manual for Air Conditioners with Refrigerant Piping Mounted/Using R410A Refrigerant (The following is selected from the document published by The Japanese Refrigeration and Air Conditioning Industry Association) 7.1 Overview 7.1.
(3) Lubricants for R410A Mineral oil, AB (Alkybenzene), etc. are widely used as the lubricants for R22. R410A is not easily dissolved in conventional lubricants such as mineral oil, etc. and such lubricants likely stay in refrigerant cycle, so ester, ether and other synoil in which R410A is highly dissoluble are generally used. However, such synoil has high hygroscopicity, so they must be handled more carefully than conventional lubricants.
(2) Joints Copper pipes use flared joints or sleeve joints. Be sure to clean them before use. a) Flared joints Flared joints are used to connect copper pipes that can’t be used for piping as their outside diameter exceeds 20mm. In such case, sleeve joints may also be used. The sizes of ends of flared pipes, ends of flared joints and flare nuts are shown in Tables 5~8 (see pages 112 and 113).
d) Flaring Ensure to clean the clamps and copper pipes. Use the clamping bars to conduct flaring correctly. Use the flare tools for R410A or conventional flare tools. The size of flaring varies depending on the kinds of flare tool. Please note that the size must be adjusted to “Size A” with the size adjustment scaled rule when using conventional flare tools.
Table 8 Sizes of R22 flaring and flare nut [Unit: mm] Rating diameter Outside diameter Size Thickness Width of flare nut (2) Flaring procedure and precautions a) Ensure there is not any defect or dust, etc. on the flaring and connection. b) Correctly connect the flared surface and the joint axis. c) Use a torque wrench to tighten the flaring to the specified torque. The tightening torque for R410A is the same as that for R22. Insufficient torque may cause gas leakage.
(2) Characteristics a) Pipe sleeve Copper pipes as R410A pipe sleeves must have a thickness as shown in Table 3 (see Page 59) and Tables 5 and 6 (see Page 61), and sizes of flaring and flare nuts different from those of R22. Therefore, be sure to select pipe sleeves suitable for R410A. b) Insulated copper pipes Before using insulated copper pipes, ensure their thickness is suitable for R410A.
(3) Welding flux a) Reasons for using welding flux ● To remove the oxide film and impurity from metal surface to help the flow of brazing filler. ● To prevent oxidization on metal surface in welding. ● To reduce the surface tension of brazing filler to make it better adhere to the treated metal. b) Features of welding flux required ● The active temperature and welding temperature of the welding flux are the same. ● Due to the wide range of effective temperature, the welding flux is hard to carbonize.
Reducing valve Flowmeter Nitrogen Disconnecting valve From nitrogen cylinder Piping Nitrogen Rubber stopper for sealing Figure 5 Preventing oxidation in welding * Precautions for welding ① General precautions 1) The weld strength should meet the requirement. 2) Keep air tightness under the pressure condition after the operation. 3) During welding, avoid damaging the components due to high temperature. 4) Do not allow the oxide or welding flux to block the refrigerant piping.
(1) Tools designed specifically for R410A a) Manifold pressure gauge ● As R410A has the property of high pressure, conventional tools can’t be used.
e) Flare tool (clutch type) ● The flare tool for R410A has a big clamping bar receiving hole, so as to set the copper pipe portion protruding from the clamping bar during flaring to 0~0.5mm and have stronger elasticity for the increased torque of EEV. This type of flare tool can also be used for R22 copper pipes. f) Adjusting the scaled rule for the protruding portion (used when a conventional flare tool (including clutch type) is used for flaring) ● A scaled rule with the thickness of 1.
7.3.2 New installation (when new refrigerant piping is used) (1) Use the vacuum pump to suction air and detect any gas leakage (see Figure 6) a) Connect the charge hose to the outdoor unit. ① b) Connect the charge hose to the vacuum pump adapter. ② Here, fully close the control valves. ③④ c) Push Handle Lo to the full open position ⑤ and turn on the power switch of the vacuum pump. In this step, evacuate the appliance (for about 10~15 minutes).
f) After charging the liquid refrigerant into the air conditioner by closing the charging valve, fully close Valve Lo of the manifold pressure gauge to stop. ②⑤ g) Quickly move the charge hose away from the service opening.⑥ If the movement is slow, the circulating refrigerant may be leaked. h) Secure the covers of the service opening and control valve, and check for any gas leakage around the covers.
7.3.6 Recharging refrigerant in servicing If it is necessary to charge refrigerant, charge the specified amount of refrigerant by following these steps. (For details, see the operation manual prepared by the equipment manufacturer.) 1) Connect the charge hose to the service opening of the outdoor unit. 2) Connect the charge hose to the vacuum pump adapter. Here, push the control valve to the full open position. 3) Push Handle Lo to the full open position (ON) and turn on the power switch of the vacuum pump.
(4) Recovery procedure a) According to the instructions on refrigerant recovery device (see the operation manual supplied), operate the device to recover refrigerant. b) Pay attention to the following during the operation. ① Confirm that the refrigerant recovery device runs according to the requirements and the operation status is always monitored, so as to take correct actions in case of emergency. ② During the operation, stay at the working site to ensure safety.
b) Charge hose (pressure resistant fluorocarbon hose) and sealing ring ● Thickness 1/48, multiple lengths available ● Hose with the pressure resistance property higher than 5.2MPa (52kg/cm2G) ● In general, only one end has fixture. Hose (4) Manifold pressure gauge sealing ring ● The most important servicing tool for coolers and air conditioners ● It is widely used to check gas pressure when R410A is being charged/recovered.
8 MOUNT ASSEMBLY 8.1 Indoor unit 8.1.1 SRK20MA-S SRK20MA-S-PANEL&FAN ASSY NO.
15 RYD935C005 COLLAR 6 16 RYD129A098 BRACKET,MOTOR(L) 1 17 RYD129A099 BRACKET,MOTOR(R) 1 18 RYD144A018 CRANK(C) 2 19 RYD512T002J MOTOR,STEPPING 1 20 RYD512T002K MOTOR,STEPPING 1 RYD129A100 BOX ASSY,GEAR 1 22 RYD512T019B MOTOR,STEPPING 1 23 RYD504A028 HARNESS ASSY 1 24 RYD423A009 HOSE,DRAIN 1 25 SSA326A047 PLUG 1 26 RYD111A017A BASE ASSY 1 27 RYD129A084 CASE,MOTOR(U) 1 28 RYD129A085 CASE,MOTOR(L) 1 29 RYG923C001 BEARING,PLANE 1 30 RYD431G002 IMPELL
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SRK20MA-S-HEAT EXCH.&CONTROL NO. 1-8 Parts No Parts Name RE.
18-20 RYD505A048F PWB ASSY 1 19 RYG555B002A VARISTOR 1 20 RYG564A003 FUSE(CURRENT) 1 21 RYD503A016 DISPLAY ASSY 1 22 RYD505A016 PWB ASSY(DISPLAY) 1 23-24 RYD132A010 LID ASSY,CONTROL 1 23 RYD132A009 LID,CONTROL 1 24 RYD132A008 COVER,LID 1 25 RYA941F001 SPRING,LEAF 1 26 RYD129A104 COVER ASSY(TB) 1 27 RYD008A046B PARTS SET 1 28 RYD437A004A FILTER ASSY,CLEAN(PP,HEPA) 1 29 RYD437A010A FILTER ASSY,CLEAN(PP,HEPA) 1 30 RYD012A193 MANUAL,INSTRUCTION&INS 1 31 R
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8.1.2 SRK25MA-S SRK25MA-S-PANEL&FAN ASSY NO.
16 RYD129A098 BRACKET,MOTOR(L) 1 17 RYD129A099 BRACKET,MOTOR(R) 1 18 RYD144A018 CRANK(C) 2 19 RYD512T002J MOTOR,STEPPING 1 20 RYD512T002K MOTOR,STEPPING 1 RYD129A100 BOX ASSY,GEAR 1 22 RYD512T019B MOTOR,STEPPING 1 23 RYD504A028 HARNESS ASSY 1 24 RYD423A009 HOSE,DRAIN 1 25 SSA326A047 PLUG 1 26 RYD111A017A BASE ASSY 1 27 RYD129A084 CASE,MOTOR(U) 1 28 RYD129A085 CASE,MOTOR(L) 1 29 RYG923C001 BEARING,PLANE 1 30 RYD431G002 IMPELLER 1 31 RYD512T022A MOT
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SRK25MA-S-HEAT EXCH.&CONTROL NO. 1-8 Parts No Parts Name RE.
18-20 RYD505A048G PWB ASSY 1 19 RYG555B002A VARISTOR 1 20 RYG564A003 FUSE(CURRENT) 1 21 RYD503A016 DISPLAY ASSY 1 22 RYD505A016 PWB ASSY(DISPLAY) 1 23-24 RYD132A010 LID ASSY,CONTROL 1 23 RYD132A009 LID,CONTROL 1 24 RYD132A008 COVER,LID 1 25 RYA941F001 SPRING,LEAF 1 26 RYD129A104 COVER ASSY(TB) 1 27 RYD008A046B PARTS SET 1 28 RYD437A004A FILTER ASSY,CLEAN(PP,HEPA) 1 29 RYD437A010A FILTER ASSY,CLEAN(PP,HEPA) 1 30 RYD012A193 MANUAL,INSTRUCTION&INS 1 31 R
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8.1.3 SRK35MA-S SRK35MA-S-PANEL&FAN ASSY NO.
16 RYD129A098 BRACKET,MOTOR(L) 1 17 RYD129A099 BRACKET,MOTOR(R) 1 18 RYD144A018 CRANK(C) 2 19 RYD512T002J MOTOR,STEPPING 1 20 RYD512T002K MOTOR,STEPPING 1 RYD129A100 BOX ASSY,GEAR 1 22 RYD512T019B MOTOR,STEPPING 1 23 RYD504A028 HARNESS ASSY 1 24 RYD423A009 HOSE,DRAIN 1 25 SSA326A047 PLUG 1 26 RYD111A017A BASE ASSY 1 27 RYD129A084 CASE,MOTOR(U) 1 28 RYD129A085 CASE,MOTOR(L) 1 29 RYG923C001 BEARING,PLANE 1 30 RYD431G002 IMPELLER 1 31 RYD512T022A MOT
- 93 -
SRK35MA-S-HEAT EXCH.&CONTROL NO.
18-20 RYD505A048H PWB ASSY 1 19 RYG555B002A VARISTOR 1 20 RYG564A003 FUSE(CURRENT) 1 21 RYD503A016 DISPLAY ASSY 1 22 RYD505A016 PWB ASSY(DISPLAY) 1 23-24 RYD132A010 LID ASSY,CONTROL 1 23 RYD132A009 LID,CONTROL 1 24 RYD132A008 COVER,LID 1 25 RYA941F001 SPRING,LEAF 1 26 RYD129A104 COVER ASSY(TB) 1 27 RYD008A046B PARTS SET 1 28 RYD437A004A FILTER ASSY,CLEAN(PP,HEPA) 1 29 RYD437A010A FILTER ASSY,CLEAN(PP,HEPA) 1 30 RYD012A193 MANUAL,INSTRUCTION&INS 1 31 R
- 96 -
8.1.4 SRK50MA-S SRK50MA-S-PANEL&FAN ASSY NO.
16 RYD129A098 BRACKET,MOTOR(L) 1 17 RYD129A099 BRACKET,MOTOR(R) 1 18 RYD144A018 CRANK(C) 2 19 RYD512T002J MOTOR,STEPPING 1 20 RYD512T002K MOTOR,STEPPING 1 RYD129A100 BOX ASSY,GEAR 1 22 RYD512T019B MOTOR,STEPPING 1 23 RYD504A028 HARNESS ASSY 1 24 RYD423A009 HOSE,DRAIN 1 25 SSA326A047 PLUG 1 26 RYD111A017A BASE ASSY 1 27 RYD129A084 CASE,MOTOR(U) 1 28 RYD129A085 CASE,MOTOR(L) 1 29 RYG923C001 BEARING,PLANE 1 30 RYD431G002 IMPELLER 1 31 RYD512T022A MOT
- 99 -
SRK50MA-S-HEAT EXCH.&CONTROL NO.
18-20 RYD505A048J PWB ASSY 1 19 RYG555B002A VARISTOR 1 20 RYD564A002 FUSE(CURRENT) 1 21 RYD503A016 DISPLAY ASSY 1 22 RYD505A016 PWB ASSY(DISPLAY) 1 23-24 RYD132A010 LID ASSY,CONTROL 1 23 RYD132A009 LID,CONTROL 1 24 RYD132A008 COVER,LID 1 25 RYA941F001 SPRING,LEAF 1 26 RYD129A104 COVER ASSY(TB) 1 27 RYD008A046B PARTS SET 1 28 RYD437A004A FILTER ASSY,CLEAN(PP,HEPA) 1 29 RYD437A010A FILTER ASSY,CLEAN(PP,HEPA) 1 30 RYD012A193 MANUAL,INSTRUCTION&INS 1 31 R
- 102 -
8.2 Outdoor unit 8.2.1 SRC20MA-S SRC20MA-S-PANEL&FAN ASSY NO. Parts No Parts Name RE.
18 RYF141A005 PLATE ,BAFFLE 1 19 RYF111A003F BASE ASSY 1 - 104 -
NO.
40 41 42 RYF011F037B RYF011H029 RYC008A002 LABEL,MODEL NAME LIST,LABEL(ENERGY) PARTS,STANDARD - 106 - 1 1 1
8.2.2 SRC25MA-S SRC25MA-S-PANEL&FAN ASSY NO. Parts No Parts Name RE.
19 RYF111A003F BASE ASSY - 108 - 1
NO.
38 39 （40） （41） （42） RYF129A003 RYF142A011 RYF011F037B RYF011H029A RYC008A002 HOLDER,SENSOR LID LABEL,MODEL NAME LIST,LABEL(ENERGY) PARTS,STANDARD - 110 - 1 1 1 1 1
8.2.3 SRC35MA-S SRC35MA-S-PANEL&FAN ASSY NO. Parts No Parts Name RE.
19 RYF111A003F BASE ASSY - 112 - 1
NO.
（40） （41） （42） RYF011F037B RYF011H029B RYC008A002 LABEL,MODEL NAME LIST,LABEL(ENERGY) PARTS,STANDARD - 114 - 1 1 1
8.2.4 SRC50MA-S SRC50MA-S-PANEL&FAN ASSY NO. Parts No Parts Name RE.
19 RYF111A002G BASE ASSY - 116 - 1
SRC50MA-S-HEAT EXCH&CONTROL NO.
（42） RYC008A002 PARTS,STANDARD - 118 - 1
VARIABLE FREQUENCY WALL MOUNTED TYPE ROOM AIR CONDITIONERS MITSUBISHI HEAVY INDUSTRIES EUROPE, LTD. AIR-CONDITIONING DIVISION 4th Floor, International Buildings, 71 Kingsway London WC2B 6ST, U.K.
