Related Manuals for Mitsubishi SRK50ZHX-S
Summary of Contents for Mitsubishi SRK50ZHX-S
- Page 1 Manual No. ’08 . SRK-T . 079 INVERTER WALL MOUNTED TYPE ROOM AIR-CONDITIONER ( Split system, air to air heat pump type ) SRK50ZHX-S, SRK60ZHX-S...
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Page 2: Table Of Contents
CONTENTS 1 GENERAL INFORMATION..............1 1.1 Specific features................1 1.2 How to read the model name ............1 2 SELECTION DATA ................2 2.1 Specifications ................2 2.2 Range of usage & limitations ............4 2.3 Exterior dimensions ..............4 2.4 Piping system ................ - Page 3 6 MAINTENANCE DATA ................30 6.1 Troubleshooting procedures for electrical equipment ....30 6.2 Servicing ..................48 7 REFRIGERANT PIPING INSTALLATION / SERVICING MANUAL FOR AIR CONDITIONERS USING R410A ........... 49 7.1 Outline .................... 49 7.2 Refrigerant piping installation ............. 50 7.3 Installation, removal and servicing..........
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Page 4: General Information
1.1 Specific features The “MITSUBISHI HEAVY INDUSTRIES, LTD” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor. -
Page 5: Selection Data
2 SELECTION DATA 2.1 Specifications Model SRK50ZHX-S (Indoor unit) SRC50ZHX-S (Outdoor unit) (220/230/240V) Model SRK50ZHX-S SRC50ZHX-S Item Cooling capacity 5000 (700~6200) Heating capacity 6000 (700~8800) Power source 1 Phase, 220-240V, 50Hz Cooling input 1.30 (0.2~2.20) Running current (Cooling) 6.0/5.7/5.5 Heating input 1.35 (0.2~2.26) - Page 6 Model SRK60ZHX-S (Indoor unit) SRC60ZHX-S (Outdoor unit) (220/230/240V) Model SRK60ZHX-S SRC60ZHX-S Item Cooling capacity 6000 (800~6800) Heating capacity 6800 (800~9700) Power source 1 Phase, 220-240V, 50Hz Cooling input 1.86 (0.25~2.30) Running current (Cooling) 8.5/8.2/7.8 Heating input 1.67 (0.25~2.70) Running current (Heating) 7.7/7.3/7.0 Inrush current 8.5/8.2/7.8...
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Page 7: Range Of Usage & Limitations
Max. 7 times/h Frequency of ON-OFF cycle (Inching prevention 5 minutes) ON and OFF interval Max. 3 minutes 2.3 Exterior dimensions (1) Indoor unit Models SRK50ZHX-S, 60ZHX-S Unit: mm Piping hole right (left) Terminal block 122.1 881.9 Piping for Gas 491.1(¿12.7) Drain hose 20.8 (¿16) -
Page 8: Piping System
71.2 Terminal block 148.4 33.5 Service valve(Liquid) Ground terminal Flare connection ø6.35(1/4") Service valve(Gas) Flare connection ø12.7(1/2") 2.4 Piping system Models SRK50ZHX-S, 60ZHX-S Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connection Service valve temp. sensor (Gas) -
Page 9: Selection Chart
2.5 Selection chart Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be obtained in the following way. Net capacity = Capacity shown on specification ✕ Correction factors as follows. (1) Coefficient of cooling and heating capacity in relation to temperatures 1. -
Page 11: Outline Of Operation Control By Microcomputer
4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch Remote control Models All models S Operation section FAN SPEED button OPERATION MODE select button Each time the button is pressed, the Each time the button pressed, the display is switched over in turn. -
Page 12: 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 turn the unit off. (2) Details of operation The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by sensor), whether to go into the cooling, thermal dry or heating modes. -
Page 13: Flap And Louver Control
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. (Flap stopped) (Swing) •... -
Page 14: Auto Operation
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) (a) Air flow selection is determined according to room temperature and setting temperature. -
Page 15: Timer Operation
4.7 Timer operation (1) Comfortable timer setting (ON timer) 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 16: Outline Of Heating Operation
(a) Fuzzy operation Deviation between the room temperature setting correction temperature and the suction air temperature is calculated in accordance with the fuzzy rule, and used for control of the air capacity and the inverter speed. Model SRK50ZHX-S SRK60ZHX-S Fan speed Auto... -
Page 17: Outline Of Cooling Operation
(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 between the room temperature setting correction temperature and the suction air temperature. Model SRK50ZHX-S SRK60ZHX-S Fan speed Auto 12~86rps... -
Page 18: Protective Control Function
4.12 Protective control function (1) Frost prevention control (During cooling or dehumidifying) (a) Operating conditions Indoor heat exchanger temperature (Th2) is lower than 5ºC. Inverter command 5 minutes after reaching the inverter command speed except 0 rps. speed (b) Detail of anti-frost operation Lower limit Indoor heat exchanger... - Page 19 (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: The lower limit of the inverter command speed is set to 44 (30) rps and even if the speed becomes lower than 44 (30) rps, the speed is kept to 44 (30) rps.
- Page 20 (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, if the output speed obtained with the fuzzy calculation exceeds the upper limit, the upper limit value is maintained.
- Page 21 (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 pipe. (Example) Fuzzy 4 rps After lapse of 3 min.
- Page 22 (13) Serial signal transmission error protection (a) Purpose: Prevents malfunction resulting from error on the indoor ↔ outdoor signals. (b) Detail of operation: If the compressor is operating and a serial signal cannot be received from the indoor control with outdoor control having serial signals continues for 7 minute and 35 seconds, the compressor is stopped.
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Page 23: Application Data
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., and then perform the installation works. ¡... - Page 24 WARNING ¡ Do not put the drain pipe directly into the ditch where toxic gas such as sulfur is generated. Toxic gas would flow into the room. Also, this may cause corrosion of indoor unit, and malfunction or refrigerant leakage. ¡...
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Page 25: Selection Of Location For Installation
5.1 Selection of location for installation (1) Indoor unit 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. Right side A place where there will be enough space for servicing. - Page 26 (m) Installation space Walls surrounding the unit in the four sides are not acceptable. There must be a 1-meter or larger space in the above. When more than one unit are installed side by side, provide a 250mm or wider interval between them as a service space. In order to facilitate servicing of controllers, please provide a sufficient space between units so that their top plates can be removed easily.
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Page 27: Installation Of Indoor Unit
5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board Adjustment of the installation board in the horizontal direction Look for the inside wall structures (Intersediats support or pillar and is to be conducted with four screws in a temporary tightened finally install the unit after level surface has been checked.) state. - Page 28 (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. Use cables for interconnection wiring to avoid loosening of the wires.
- Page 29 [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 screw and drain ¡Remove it with hand or ¡Insert the drain cap which was removed at ¡Inserted the drain hose hose, making it rotate.
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Page 30: Installation Of Outdoor Unit
5.3 Installation of outdoor unit (1) Installation of outdoor unit Make sure that the unit is stable in installation. Fix the unit to stable base. 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 31 (3) Air purge Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak. Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below. 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 –...
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Page 32: Test Run
(3) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (4) Make sure that drain flows properly. (5) Standard operation data (220/230/240V) Model SRK50ZHX-S SRK60ZHX-S Item – – Cooling High pressure (MPa) 2.3~2.4... -
Page 33: Maintenance Data
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 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 34 (4) 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 32. Is an error code displayed by Using the Service Mode, access the self-diagnosis the self-diagnosis function?
- Page 35 (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 stops and the air conditioner resumes operation.
- Page 36 (6) 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 37 *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 38 (Example) Remote control setting Operation Displayed data Temperature Fan speed switching switching setting Cooling 21°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 error was displayed. 22°C Displays the reason for the stop (error code) 3 times previous when an error was displayed.
- Page 39 (c) Error code, stop code table (Assignment of error codes and stop codes is done in common for all models.) Number of flashes when in service mode Stop coad Error Auto Error content Cause Occurrence conditions TIMER display recovery Error coad light light (10's digit)
- Page 40 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.) • In the case of current cut (example: stop code “42”) The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times.
- Page 41 (e) 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 42 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 43 Service data record form Customer Model 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 44 (7) 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)
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Page 45: Current Cut
[Open phase on compressor output Current cut terminal, compressor lock] Does current cut operate when operating inverter with compressor Defective outdoor PCB wire disconnected? Is output voltage applied to all 3 Defective outdoor PCB phases of power transistor? Secure space for suction Is there any shortcircuit? and blow out. -
Page 46: Over Heat Of Compressor
[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 41) Check if there are any Does trouble persist after Is sufficient quantity of refrigerant places where gas is leaking. - Page 47 [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 48 (b) Outdoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling System can be operated normally. Compressor stop. Heat exchanger sensor Heating Defrosting is not performed. Defrosting is performed for 10 minutes at approx. 35 minutes. Cooling System can be operated normally. Compressor stop.
- Page 50 ◆ 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.)] (1) 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.
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Page 51: Servicing
6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities..noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant 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 52: Refrigerant Piping Installation/Servicing Manual For Air Conditioners Using R410A
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) 7.1 Outline 7.1.1 Refrigerant R410A (1) 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 53: Refrigerant Piping Installation
(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 cycle. As the lubricating oils highly soluble with R410A, ester, ethereal and other synthetic oils are available. - Page 54 (2) Joints For 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.
- Page 55 d) 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”...
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Page 56: Storage Of Piping Materials
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 (2) Flare connecting procedures and precautions a) Make sure that the flare and union portions do not have any scar or dust, etc. - Page 57 (2) Identification a) Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 (see on page 50), and, as shown in Tables 5 and 6 (see on page 52), 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 58 (3) Flux a) 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. •...
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Page 59: 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 60 (1) Tools exclusive for R410A a) 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 61 e) 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 62 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 closed position.
- Page 63 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 securing the caps on the service port and control valve, check the caps’...
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Page 64: Refrigerant Recovery
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 outdoor unit’s service port. 2) Connect the charge hose to the vacuum pump adapter. - Page 65 (4) Recovering procedures a) According to the instructions for handling the refrigerant recovering equipment (described in the attached instruction manual), operate the equipment to recover refrigerant. b) 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 66 b) 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. (4) Gauge manifold Hose Setting...
- Page 67 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 No.116(1.1A) R...