Mitsubishi SKM40ZA- Installation Manual

- 8 - (2) Outdoor unit: SRC20MA-S/ SRC25MA-S/ SRC35MA-S Unit: mm (3) Outdoor unit: SRC50-MA-S Unit: mm Drainage pipes Junction box Operation valve (Liquid) Flare connecting Operation valve (Gas) Flare connecting Drain holes Terminal block Operation valve (Liquid) Flare connecting Operation valve (Ga...

- 9 - 2.4 Cooling cycle system diagram Models: MA-S Series Note (1)……line is piping for site construction. Indoor unit Outdoor unit Circulation of cooling Circulation of heating Flare connecting Operation valve (Gas) Outdoor air temp. sensor Air heat exchanger Heat exchanger sensor Gas liquid separa...

- 12 - 3 ELECTRICAL WIRING DIAGRAM 3.1 Circuit diagram: 20, 25, 35MA-S

- 15 - Indication section of air conditioner RUN lamp (green) ON during running Heat-retaining Running Stop 1.5 sec. 0.5 sec. ON during HI POWER/JET running TIMER lamp (yellow) ON during timing operation HI POWER/JET lamp (green) Receiving part of remote controller Receives signals from remote contr...

- 16 - Operation and indication section for remote control Operation section FAN SPEED button Each time this button is pressed, ■ displaying changes in order. HI POWER button This button is used to change the HI POWER mode. TEMP button This button is used to set the room temp. (or select the current...

- 20 - 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. (2) Operation method: For example, to set to 11:30, ① Step 1: Use the pen point to press the ACL switch and...

- 24 - 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 T...

- 25 - 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 fac...

- 29 - 5 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 un...

- 32 - 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 inst...

- 33 - Installation of indoor unit Drilling holes and secur ing sleeve (optional) Drilling a hole with Φ65 whole core drill Indoor Outdoor Adjusting the length of the sleeve Top Thickness of wall Use the whole core drill to drill a hole. Mounting the sleeve. ○ If the rear pipe is pulled out, cut the...

- 34 - Mounting pipe support ● Precautions for connection to the left and to center/rear [Top view] Pipe shaping Pipe Drainage pipe ○ Hold the root segment of the pipe, pull out the pipe, and shape the extended section. Insulation tape winding Connecting the pipe to the left Connecting the pipe to t...

- 35 - Drainage pipe ○ Mount the drainage pipe at a downward angle. ○ Avoid the following drainage pipe connections. Caution After all mounting steps, check whether the drain is proper. Otherwise, water leakage may occur. Higher than as required End of drainage pipe in water Undulating Less than 5cm...

- 36 - Flaring Measurement B Flaring block Copper pipe Model Copper pipe diameter Measurement B Clutch type flare tool for R410A Conventional (R22) flare tool Clutch type Wing nut type Use a flare tool designed for R410A or a conventional flare tool. Please note that measurement B (protrusion from t...

- 37 - 5.5 Precautions for wireless remote controller operation: (1) Effective distance of wireless remote controller: (2) Precautions: ① The remote controller should be correctly facing the receiver of the air conditioner for manipulation. ② The typical coverage is indicated in the left illustratio...

- 39 - 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 ou...

- 41 - (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 ...

- 43 - (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. (a) Terms ...

- 44 - *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) flash...

- 45 - ② Stop data Settings of remote controller Indication data Operation switching Air flow switching Temperature setting Cooling Lo 21 ℃ Indicates the cause of the last stop due to protection control, etc. (stop code) 22 ℃ Indicates the cause of second to last stop due to protection control, etc....

- 49 - (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: ℃ * If there is no data recorded (the error code is normal), the information of each sensor is as showed in the table below...

- 52 - Check data recording sheet Customer Model Date Equipment name Complaint Settings of remote controller Content of indication data Indication result Content of indication Temp. setting Operation switching Air flow switching Buzzer (yes/no) RUN lamp (no. of times) TIMER lamp (no. of times) 21 Co...

- 53 - (7) Check method according to the content of failure ● List of temperatures and resistance properties of sensor <Temperature of vent-pipe of outdoor compressor> ● Curve and table of temperatures and resistance properties of sensors <Room temperature sensor, heat exchanger (indoor and...

- 55 - Serial signal transmission error (Wrong power supply and signal cable connection, failure of indoor and outdoor PCB, error of power supply system) Indoor fan motor error (Failure of fan motor, failure of indoor PCB) Compressor lock (Failure of compressor, failure of outdoor PCB) No Is the pow...

- 56 - Outdoor fan motor error (Failure of fan motor, failure of outdoor PCB) (8) Actions in case of short circuit and wire break of sensor (a) Indoor unit Sensor Operation type Actions Short circuit Wire break Room temp. sensor Cooling Become the compressor continuous operation instruction No compr...

- 57 - (9) Check method for indoor electrical components (10) Check method for indoor fan motor (DC motor) Method for checking whether the fan motor or the circuit board malfunctions when the indoor fan motor is abnormal 1) Output check of indoor PCB A) Unplug the wire from the power socket. B) Remo...

- 58 - (11) Remote controller failure diagnosis procedure No Is the remote controller normal after reset? Note (1) No No Yes ● Low battery of remote controller ● Defective remote controller Replace Restart Does the air conditioner operate? Yes Yes No error Defective PCB of indoor unit Can the air co...

- 63 - 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, wh...

- 64 - 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 7.1.1 R410A Refrigerant (1) Using R410A in air conditioner...

- 65 - (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 h...

- 69 - (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) In...

- 71 - 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 no...

- 72 - (1) Tools designed specifically for R410A a) Manifold pressure gauge ● As R410A has the property of high pressure, conventional tools can’t be used. Table 11 Difference between conventional high/low pressure gauge and pressure gauge for R410A ● In order to prevent charging other types of refr...

- 73 - 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...

- 76 - 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 out...

- 78 - 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/cm 2 G) ● In general, only one end has fixture. (4) Manifold pressure gauge ● The most important servicing ...

- 79 - 8 MOUNT ASSEMBLY 8.1 Indoor unit 8.1.1 SRK20MA-S SRK20MA-S-PANEL&FAN ASSY NO. Parts No Parts Name RE.Q 1-7 RYD102A033H PANEL ASSY,FRONT 1 1 RYD122A057C PANEL,FRONT 1 2 RYD435A056G GRILLE,AIR INLET 1 3 RYD437A030 FILTER,AIR 2 4 RYD129A088A CAP 2 5 RYD133A049 PLATE ASSY,ORNAMENT 1 6 RYD129A...

- 80 - 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 21-22 RYD129A100 BOX ASSY,GEAR 1 22 RYD512T019B MOTOR,STEPPING 1 23 RYD504A028 HARNESS ASSY 1 24 RYD423A009 HOSE,DR...

- 104 - 18 RYF141A005 PLATE ,BAFFLE 1 19 RYF111A003F BASE ASSY 1

- 119 - 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. Phone: +44 (0) 20 7421 6208 Fax: +44 (0) 20 7421 6209