Page 2 - CONTENTS; Precautions for wireless remote control installation and
CONTENTS 1 GENERAL INFORMATION .................................................................... 1 1.1 Specific features ............................................................................ 1 1.2 How to read the model name ....................................................... 1 2 SELECT...
Page 3 - REFRIGERANT PIPING INSTALLATION / SERVICING MANUAL
6 MAINTENANCE DATA .......................................................................... 30 6.1 Troubleshooting procedures for electrical equipment .............. 30 6.2 Servicing ........................................................................................ 48 7 REFRIGERANT PIPING IN...
Page 4 - GENERAL INFORMATION; Specific features; Fuzzy control; How to read the model name
- 1 - Over heat of compressor Error of signal transmission Outdoor fan motor error 1 GENERAL INFORMATION 1.1 Specific features The “MITSUBISHI HEAVY INDUSTRIES, LTD” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrige...
Page 5 - SELECTION DATA
- 2 - Model SRK50ZHX-S (Indoor unit) SRC50ZHX-S (Outdoor unit) Item Model SRK50ZHX-S SRC50ZHX-S Cooling capacity (1) W 5000 (700~6200) Heating capacity (1) W 6000 (700~8800) Power source 1 Phase, 220-240V, 50Hz Cooling input kW 1.30 (0.2~2.20) Running current (Cooling) A 6.0/5.7/5.5 Heating input kW...
Page 7 - Exterior dimensions; Indoor unit; Cooling operation : Approximately 18 to 32 ̊C; VIEW A
- 4 - 2.2 Range of usage & limitations 2.3 Exterior dimensions (1) Indoor unit Models SRK50ZHX-S, 60ZHX-S Indoor return air temperature(Upper, lower limits) Refrigerant line (one way) length Max. 30m SRK50ZHX-S, 60ZHX-S Cooling operation : Approximately 18 to 32˚C Heating operation : Approximate...
Page 8 - Outdoor unit
- 5 - Unit: mm (2) Outdoor unit Models SRC50ZHX-S, 60ZHX-S Drain hole Terminal block 640 12.4 89 93 42.5 43.5 327.3 327.3 83.5 510 201 71.2 14.8 312.5 24.3 351.6 17.9 12 50.6 290 800 33.5 148.4 40˚ 40˚ Ground terminal Service valve(Liquid)Flare connection ø6.35(1/4") Service valve(Gas)Flare conn...
Page 9 - obtained in the following way.; Net capacity = Capacity shown on specification; and outdoor dry-bulb temperature 35 ̊C is Net cooling capacity = 6000; Air inlet temperature of
- 6 - 2.5 Selection chart Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be obtained in the following way. Net capacity = Capacity shown on specification ✕ Correction factors as follows. (1) Coefficient of cooling and h...
Page 10 - ELECTRICAL D; Electrical wiring
- 7 - 3 ELECTRICAL D A T A 3.1 Electrical wiring Models SRK50ZHX-S, 60ZHX-S Meaning of marks Symbol Parts name Symbol Parts name Symbol Parts name CMFFM I FM O SM 1 SM 2 SM 3 Compressor motorFuseFan motor (Indoor)Fan motor (Outdoor)Flap motor (L)Flap motor (R)Louver motor (L) SM 4 Louver motor (R) S...
Page 11 - Remote control; Operation section; OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER; Operation control function by remote control switch; OPERATION MODE select button; Unit indication section
- 8 - Models All models Remote control S Operation section 4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch FAN SPEED button Each time the button is pressed, the display is switched over in turn. OPERATION MODE select button Each time the button...
Page 12 - Auto restart function; Custom cord switching procedure
- 9 - Unit ON/OFF button 4.2 Unit ON/OFF button When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the unit on and off. (1) Operation Push the button once to place the unit in the automatic mode. Push it once more to tur...
Page 13 - Flap and louver control; Flap; Angle of Flap from Horizontal; Center installation; Angle of Louver
- 10 - 4.5 Flap and louver control Control the flap and louver by AIRFLOW (UP/DOWN) and (LEFT/RIGHT) button on the wireless remote control. (1) Flap Each time when you press the AIRFLOW (UP/DOWN) button the mode changes as follows. (2) Louver Each time when you press the AIRFLOW (LEFT/RIGHT) button ...
Page 14 - D auto operation; During Cooling and Heating (Including auto cooling and heating); According to DRY operation.
- 11 - 4.6 3D auto operation Control the flap and louver by 3D AUTO button on the wireless remote control. Air flow selection and air flow direction are automatically controlled, allowing the entire room to efficiently conditioned. (1) During Cooling and Heating (Including auto cooling and heating) ...
Page 15 - Installation location setting; The installation location display illuminates.; Airflow range
- 12 - (2) Sleep timer operation Pressing the SLEEP button causes the temperature to be controlled with respect to the set temperature. 4.7 Timer operation (1) Comfortable timer setting (ON timer) (3) OFF timer operation The Off timer can be set at a specific time (in 10-minute units) within a 24-ho...
Page 16 - Outline of heating operation; Operation of major functional components in heating mode
- 13 - 4.9 Outline of heating operation (1) Operation of major functional components in heating mode (2) Details of control at each operation mode (pattern)(a) Fuzzy operation Deviation between the room temperature setting correction temperature and the suction air temperature is calculated inaccord...
Page 17 - Outline of cooling operation; (1) Operation of major functional components in Cooling mode; Outline of automatic operation; Determination of operation mode; operation mode, changes the operation mode.
- 14 - 27.5 25.5 19.5 18 30 4.10 Outline of cooling operation (1) Operation of major functional components in Cooling mode (2) Detail of control in each mode (Pattern) (a) Fuzzy operation During the fuzzy operation, the air flow and the inverter speed are controlled by calculating the difference bet...
Page 18 - Protective control function; Indoor heat exchanger
- 15 - 4.12 Protective control function (1) Frost prevention control (During cooling or dehumidifying) (a) Operating conditions 1) Indoor heat exchanger temperature (Th2) is lower than 5ºC. 2) 5 minutes after reaching the inverter command speed except 0 rps. (b) Detail of anti-frost operation 5°C or...
Page 19 - inverter command speed is other than 0 rps.; When either of the following condition is satisfied; Heating high pressure control; Prevents anomalous high pressure operation during heating.; Temperature list
- 16 - (4) Cooling low outdoor temperature protective control (a) Operating conditions: When the outdoor air temperature (Th5) is 22ºC or lower continues for 20 seconds while the inverter command speed is other than 0 rps. (b) Detail of operation: 1 The lower limit of the inverter command speed is s...
Page 20 - Lower limit 45 rps
- 17 - (6) Heating overload protective control (a) Operating conditions : When the outdoor air temperature (Th5) is 17˚C or higher continues for 30 seconds while the inverter command speed other than 0 rps. (b) Detail of operation: 1 Taking the upper limit of inverter command speed range at 50 rps, ...
Page 21 - there is no start at the third time.; Current safe; command speed is reduced.
- 18 - (8) Compressor overheat protection (a) Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the compressor overheat. (b) Detail of operation 1) Speeds are controlled with temperature detected by the sensor mounted on the discharge pip...
Page 23 - WARNING
- 20 - 5 APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these "Safety Precautions" first then accurately execute the installation work. ¡ For installing qualified personnel, take precautions in respect to themselves by using suitable protective clothing, groves, etc., andthen perform the ...
Page 25 - Selection of location for installation
- 22 - 5.1 Selection of location for installation (1) Indoor unit (a) Where there is no obstructions to the air flow and where the cooled and heated air can be evenly distributed. (b) A solid place where the unit or the wall will not vibrate. (c) A place where there will be enough space for servicin...
Page 26 - Limitations for one way piping length and vertical; Walls surrounding the unit in the four sides are not acceptable.
- 23 - r h Model Item All models One way piping length ( R ) 30 m Outdoor unit is lower 20 m Outdoor unit is higher 20 m Vertical height difference (h) (4) Limitations for one way piping length and vertical height difference. (m) Installation space 1) Walls surrounding the unit in the four sides are...
Page 27 - Installation of indoor unit
- 24 - 5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board (2) Drilling of holes and fixture sleeve (Option Parts) When drilling the wall that contains a metal lath, wire lath or metal plate, be sure to use pipe hole sleeve sold separately. (a) Dri...
Page 28 - ) Connect the connecting wire securely to the terminal block.; Installing the support of piping; Harmonized cable type
- 25 - (3) Preparation of indoor unit (a) Mounting of connecting wires 1) Open the air inlet panel. 2) Remove the service panel. 3) Remove the wiring clamp. 4) Connect the connecting wire securely to the terminal block. 1 Connect the connection wire securely to the terminal block. If the wire is not...
Page 29 - Drainage; Arrange the drain hose in a downward angle.; Fixing of indoor unit; How to remove the indoor unit from the installation board
- 26 - [Drain hose changing procedures] 1. Remove the drain hose. ¡ Remove the screw and drainhose, making it rotate. Since this air conditioner has been designed to collect dew dropson the rear surface to the drain pan, do not attach the powercord above the gutter. Gutter Pipe accommodation section...
Page 30 - Installation of outdoor unit; Connect using ground screw located near; CAUTION; Use one more spanner to fix the valve.; Connection of refrigerant pipings
- 27 - 5.3 Installation of outdoor unit (1) Installation of outdoor unit (a) Make sure that the unit is stable in installation. Fix the unit to stable base. (b) When installing the unit at a higher place or where it could be toppled by strong winds, secure the unit firmly with foundation bolts, wire...
Page 31 - Air purge
- 28 - Service Valve(three-way valve) Charge hose(Designed specifically for R410A) Compoundpressuregauge Pressuregauge Gauge Manifold(Designed specifically for R410A) Handle Hi. Vacuum pump Vacuum pump adapter(Anti-reverse flow type)(Designed specifically for R410A) Charge hose(Designed specifically...
Page 32 - Standard operation data; Wireless remote control covers the following distances:; If the distances exceed the area indicated above, be sure to check
- 29 - 5.5 Test run (1) Conduct trial run after confirming that there is no gas leaks. (2) When conducting trial run set the remote control thermostat to continuous operation position. However when the power source is cut off or when the unit’s operation switch is turned off or was turned to fan ope...
Page 33 - MAINTENANCE DATA; Troubleshooting procedures for electrical equipment; Cautions; YES
- 30 - 6 MAINTENANCE DATA 6.1 Troubleshooting procedures for electrical equipment (1) 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 bef...
Page 34 - Troubleshooting procedure (If the air conditioner runs); Confirm the contents of the customer complaint.
- 31 - (4) Troubleshooting procedure (If the air conditioner runs) NO NO NO NO YES YES YES YES Note (1) Even in cases where only intermittent stop data are generated, the air conditioning system is normal. However, if the same protective operation recurs repeatedly (3 or more times), it will lead to...
Page 35 - display stops and the air conditioner resumes operation.
- 32 - (5) 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...
Page 38 - Stop data
- 35 - Remote control setting Fan speed switching Operation switching Displayed data Temperature setting 21 ° C 22 ° C 23 ° C 24 ° C 25 ° C Displays the reason for the stop (error code) the previous time an error was displayed. Displays the reason for the stop (error code) 2 times previous when an e...
Page 39 - Error code, stop code table
- 36 - (c) Error code, stop code table (Assignment of error codes and stop codes is done in common for all models.) 0 No rma l - - OFF 05 5 time flash 35 Cooling high pressure control Cooling overload operation.Outdoor unit fan speed drops.Outdoor heat exchanger sensor is short circuit. When the out...
Page 40 - Remote control information tables; ) Operation switching; Remote control setting; Display when error code is normal.
- 37 - Note (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.) 0.5 sec. 1.5 sec. RUN light (10’s digit) TIMER light (1’s digit) 11-second interval 0.5 sec. OFF ON OFF ON • In the ...
Page 41 - Sensor value displayed when the error code is normal
- 38 - (e) Room temperature sensor temperature, indoor heat exchanger sensor temperature, outdoor air tempera- ture sensor temperature, outdoor heat exchanger sensor temperature table Units: ° C Buzzer sound (minus) TIMER light(1’s digit) RUN light(10’s digit) Yes (sounds for 0.1 second) 6 5 4 3 2 1...
Page 42 - Sensor name
- 39 - (f) Discharge pipe temperature table Units: ° C Buzzer sound (minus) TIMER light(1’s digit) RUN light(10’s digit) Yes (sounds for 0.1 second) 3 2 1 0 0 1 2 3 4 5 6 7 -60 -40 -20 0 20 40 60 80 100 120 140 0 1 2 3 4 5 6 7 8 9 -62 -42 -22 -2 2 22 42 62 82 102 122 142 -64 -44 -24 -4 4 24 44 64 84...
Page 43 - Service data record form
- 40 - Service data record form Customer Date of investigation Machine name Error code on previous occasion. Room temperature sensor temperature on previous occasion. Indoor heat exchanger sensor 1 temperature on previous occasion. Remote control information on previous occasion. Outdoor air tempera...
Page 44 - Inspection procedures corresponding to detail of trouble; Sensor error; S e n s o r t e m p e r a t u r e ch a r a c t e r i s t i c s; Indoor fan motor error
- 41 - (7) Inspection procedures corresponding to detail of trouble Sensor error [Broken sensor wire,connector poor connection] (Shortcircuit) (Broken wire) Is connector connection good? YES YES NO NO Replace PCB. Correct connection. Replace sensor. Is sensor resistance value good? ◆ S e n s o r t e...
Page 47 - Humidity sensor operation; Phenomenon observed after shortcircuit, wire breakage on sensor
- 44 - Outdoor fan motor error [Defective fan motor, connectorpoor connection, defective PCB] Is connector connection good? YES NO NO Is the output of the outdoor unit’sprinted circuit board normal? Normal NO YES YES Correct connector connection Is DC fan motor resistance value good? Defective outdo...
Page 48 - FM; CNU
- 45 - Operationmode Heat exchangersensor Outdoor airtemperature sensor Discharge pipesensor Compressor overload protection is disabled.(Can be operated.) (9) Checking the indoor electrical equipment (a) Indoor unit circuit board check procedure (b) Outdoor unit Phenomenon Sensor Shortcircuit Discon...
Page 49 - Check point of outdoor unit; Outdoor unit inspection points
- 46 - ◆ Inspection of r esistance value of sensor Remo v e the connector and check the resistance v alue. See the section of sensor characteristics on page 41. ◆ Inspection power transistor Remo v e the f asten ter minal and test output v oltage ◆ Inspection of electr onic expansion valve T o test ...
Page 50 - Power transistor inspection procedure; output of the power transistor.
- 47 - (11) How to make sure of remote control Note (1) Check method of remote control(a) Press the reset switch of the remote control. (b) If all LCD are displayed after one (1) display, it is basically normal. (1) Is remote control normal? YES Again pushingoperating switch Operating the unit? NO D...
Page 52 - Air Conditioning Industry Association)
- 49 - 7 REFRIGERANT PIPING INSTALLATION/SERVICINGMANUAL FOR AIR CONDITIONERS USING R410A (These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association) 7.1 Outline 7.1.1 Refrigerant R410A (1) Adoption of R410A in air conditioners In 1974, i...
Page 53 - Refrigerant piping installation
- 50 - (3) 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 cycl...
Page 54 - Table 4.Minimum thicknesses of socket joints; b) Removing burrs and chips
- 51 - (2) JointsFor copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants.a) 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.Sizes of f...
Page 59 - Fig.5 Prevention of oxidation during brazing
- 56 - * 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. 4) The refrigerant pipe work...
Page 62 - Fig.6 Configuration of air purge by vacuum pump; • Be sure to use the vacuum pump, vacuum pump adapter and
- 59 - 7.3.2 New installation work (when using new refrigerant piping) (1) Air purge by vacuum pump and gas leakage inspection (see Fig. 6) a) Connect the charge hose to the outdoor unit. 1 b) Connect the charge hose to the vacuum pump adapter. 2 At this time, keep the control valves in the fully cl...
Page 63 - Fig.7 Configuration of additional refrigerant charging
- 60 - f) 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 g) Quickly remove the charge hose from the service port. 6 When stopped halfway, refrigerant being cycled will be released. h) After...
Page 64 - Refrigerant recharging at servicing; Refrigerant recovery
- 61 - 7.3.6 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 outd...
Page 67 - Air-Conditioning & Refrigeration Systems Headquarters
- 2 - INVERTER WALL MOUNTED TYPEROOM AIR-CONDITIONER No.116(1.1A) R Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 Downloaded from AC-Manual.com Manuals
