Mitsubishi Heavy Industries SRK13ZEV-S4 Technical Manual & Parts List
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Mitsubishi Heavy Industries SRK13ZEV-S4 Technical Manual & Parts List

Mitsubishi Heavy Industries SRK13ZEV-S4 Technical Manual & Parts List

Inverter wall mounted type room air-conditioner, split system, air to air heat pump type
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ROOM AIR-CONDITIONING
TECHNICAL MANUAL & PARTS LIST
INVERTER WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
(Split system, air to air heat pump type)
SRK13ZEV-S4
SRK22ZEV-S4

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Summary of Contents for Mitsubishi Heavy Industries SRK13ZEV-S4

  • Page 1 ROOM AIR-CONDITIONING TECHNICAL MANUAL & PARTS LIST INVERTER WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air to air heat pump type) SRK13ZEV-S4 SRK22ZEV-S4...
  • Page 2 TECHNICAL MANUAL 1. SRK13ZEV-S4 .............. 2 2. SRK22ZEV-S4 ............60...

  • Page 3: Table Of Contents

    MODEL SRK13ZEV-S4 CONTENTS 1.1 GENERAL INFORMATION................. 3 (1) Specific features ...................... 3 (2) How to read the model name .................. 3 1.2 SELECTION DATA ..................4 Specifications ......................4 Range of usage & limitations ................5 Exterior dimensions ....................5 Piping system ......................

  • Page 4: 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 5: Selection Data

    1.2 SELECTION DATA (1) Specifications Model SRK13ZEV-S4 (Indoor unit) SRC13ZEV-S4 (Outdoor unit) (220V) Model SRK13ZEV-S4 SRC13ZEV-S4 Item Cooling capacity 4000 (400~5000) Heating capacity 6000 (400~9000) Power source 1 Phase, 220V, 50Hz Cooling input 0.93 (0.105~1.5) Running current (Cooling) Heating input 1.38 (0.095~2.490)

  • Page 6: Range Of Usage & Limitations

    Voltage at starting Min. 85% of rating Frequency of ON-OFF cycle Max. 10 times/h ON and OFF interval Max. 3 minutes Exterior dimensions (a) Indoor unit Model SRK13ZEV-S4 Piping hole right Indoor unit Installating board 73.5 73.5 207.5 182.5 14.5 53.5...

  • Page 7: Piping System

    90.6 29.7 Service valve (Liquid) Ground Flare connection ø6.35 (1/4") terminal Service valve (Gas) Flare connection ø9.52 (3/8") (4) Piping system Model SRK13ZEV-S4 Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connecting Service valve temp. sensor (Gas)

  • Page 8: Selection Chart

    0.92 1.00 How to obtain the cooling and heating capacity Example : The net cooling capacity of the model SRK13ZEV-S4 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 = 4000 0.975...

  • Page 10: Outline Of Operation Control By Microcomputer

    1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by remote control switch Remote control Model SRK13ZEV-S4 S Operation section OPERATION MODE select button FAN SPEED button Each time the button is pushed, the indi- Each time the button is pushed, the indi- cator is switched over in turn.

  • Page 11: Unit On/Off Button

    Unit indication section Model SRK13ZEV-S4 RUN (HOT KEEP) light (green) • Illuminates during operation. • Blinks at air flow stop due to the ‘HOT KEEP’. TIMER light (yellow) Illuminates during TIMER operation. JET/HI POWER light (green) Illuminates during JET/HIGH POWER operation.

  • Page 12: Custom Cord Switching Procedure

    (4) Custom cord switching procedure Jumper wire (J2) If two wireless remote controls 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 control using the following procedure. Be sure to modify both boards.

  • Page 13: Comfortable Timer Setting

    Electronic expansion valve Depending on the EEV control Solenoid valve (b) Air flow selection Speed of inverter changes within the range of selected air flow. Model SRK13ZEV-S4 Air flow selection Inverter command speed 12~118rps Auto Air flow Depends on inverter command speed.
  • Page 14 If the speed obtained with the fuzzy calculation drops below -24 rps during the heating fuzzy operation, the operation changes to the heating thermostat operation. ¡ Detail of operation Model SRK13ZEV-S4 Item Inverter speed 0rps [Comp. stopped] Hot keep normal mode → 1st speed...
  • Page 15 2 Continued operation time of defrosting → For more than 10 min. (v) Heating “HI POWER” operation (HI POWER button on remote control: ON) Operation is maintained for 15 minutes with a higher blow out air temperature. ¡ Detail of operation Model SRK13ZEV-S4 Item Inverter speed 118 rps Indoor fan...

  • Page 16: Outline Of Cooling Operation

    (ii) Cooling thermostat operation 1) Operating conditions During the cooling fuzzy operation or when the speed obtained by the fuzzy calculation is less than -24 rps. 2) Detail of operation Model SRK13ZEV-S4 Item Inverter speed 0 rps [Comp. stopped] Indoor fan Corresponds to fan speed switch.

  • Page 17: Outline Of Dehumidifying Operation

    (iv) Cooling “JET” operation (JET button on remote control: ON) 1) Detail of operation Model SRK13ZEV-S4 Item Inverter speed 12~96 rps Air flow Depends on inverter command speed 1 speed up 2) Indoor fan control Depends on inverter The indoor fan is controlled as shown at right in accordance with the command speed difference between the room temperature and setting temperature.
  • Page 18 2) Detail of operation Range Range Range Inverter speed Indoor fan motor 3rd speed 1st speed Reheat dehumidifying control Reheat + 1 speed up dehumidifying Outdoor fan motor control Solenoid valve 12 minutes 12 minutes 12 minutes Reheat dehumidifying operation range decision Temperature and humidity check Notes (1) If the operation range switches from a range other than the A range to the A range, the command speed is set at 10 rps for 10 seconds.
  • Page 19 (iii) Heating oriented dehumidifying 1) Detail of operation Model SRK13ZEV-S4 Item Inverter command speed 80 rps Indoor unit fan 4th speed Outdoor unit fan 5th speed 4-way valve Solenoid valve Notes (1) When a JET operation signal is received from the remote control, the indoor unit fan’s speed is raised 1 speed.

  • Page 20: Outline Of Automatic Operation

    (e) Low temperature dehumidifying protective control (Cooling oriented dehumidifying or reheat dehumidifying) Operating condition: When the room temperature or outdoor temperature becomes lower than 4ºC. (ii) Detail of operation Model SRK13ZEV-S4 Item Inverter speed 0 rps Indoor fan motor 2nd speed...

  • Page 21: Ion Operation

    1) When the inverter command speed is higher than 28 rps. 2) When the humidity sensor value is higher than 68%. (ii) Detail of operation: Model SRK13ZEV-S4 Item Upper limit of inverter speed A range: 50 rps, B range: 30 rps...
  • Page 22 (d) Prevention of continuous low speed operation: For oil return to compressor Operating condition: When command speed of less than 26 rps continues for 60 minutes (ii) Detail of operation: The unit is operated at command speed of 30 rps forcibly for 15 seconds. (The indoor and outdoor fans are not changed.) Note (1) When the command of exceeding 30 rps is directed during 30 rps forced operation, the unit follows it.
  • Page 23 Cooling Heating SRK13ZEV-S4 2) If the temperature of 110ºC is detected by the sensor on the discharge pipe, then the compressor will stop immediately. When the discharge pipe temperature drops and the time delay of 3 minutes is over, the unit starts again within 1 hour but there is no start at the third time.
  • Page 24 (o) High pressure control Purpose: Prevents anomalous high pressure operation during heating. (ii) Detector: Indoor unit heat exchanger sensor (Th2) (iii) Detail of operation: (Example) Fuzzy 8 rps After lapse of 20 Sec. or over 8 rps After lapse of 20 Sec. or over Lower limit After lapse of 20 Sec.
  • Page 25 (q) Prevention of continuous low speed operation: For oil return to compressor Operating condition: When inverter command speed of less than 26 rps continues for 60 minutes (ii) Detail of operation: The unit is operated at inverter command speed of 30 rps forcibly for 15 seconds. (The indoor and outdoor fans are not changed.) Note (1) When the inverter command of exceeding 30 rps is directed during 30 rps forced operation, the unit follows it.

  • Page 26: Application Data

    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 27: Selection Of Location For Installation

    2) Design the base higher than possible snow deposit. the possible snow deposit height (c) Limitations for one way piping length and vertical height difference. Model SRK13ZEV-S4 Item One way piping length (R) 25 m Outdoor 15 m Vertical height...

  • Page 28: 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 checked.) Unit : mm...
  • Page 29 (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 30 [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 31: 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 32: 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 33: 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 (220V) Model SRK13ZEV-S4 Item – Cooling High pressure (MPa) Heating 2.4~2.6 Cooling 1.1~1.3 Low pressure (MPa) –...

  • Page 34: Maintenance Data

    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 discharging this electrical charge (to DC 10 V or lower).
  • Page 35 (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 35. Identify the faulty component by using the check procedure corresponding to the content of the trouble.
  • Page 36 (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 37 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 38 [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 39 [Gas shortage, defective discharge Over heat of compressor pipe sensor] Connector connection check, resistance Is discharge pipe sensor value check, replacement of discharge pipe resistance value good? sensor (page 36) Check if there are any Does trouble persist after Is sufficient quantity of refrigerant places where gas is leaking.
  • Page 40 [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 t h e D C fa n m o t o r a n d outdoor unit circuit board Replace outdoor fan motor separately.
  • Page 41 (ii) Outdoor unit Phenomenon Operation Sensor Shortcircuit Broken wire mode 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 43 ◆ 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.
  • Page 44 How to make sure of remote control Is remote Remote control control normal? defects Replace the display. Again pushing operating switch Is the unit Normal operable with remote control? Abnormality is not Operating the unit? found. Defective remote control Does unit ON/OFF button operates? Note (1) Check method of remote control Press the reset switch of the remote control.

  • Page 45: 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 46: Refrigerant Piping Installation/Servicing Manual For Air Conditioners Using R410A

    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 (a) 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 47: 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 48 (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 49 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 50 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 51 (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 46), and, as shown in Tables 5 and 6 (see on page 48), 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 52 (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 53: 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 54 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 55 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 56 (b) 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 57 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 58: 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 59 (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 60 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 61 MODEL SRK22ZEV-S4 CONTENTS 2.1 GENERAL INFORMATION................. 61 Specific features ...................... 61 How to read the model name .................. 61 2.2 SELECTION DATA ..................62 Specifications ......................62 Range of usage & limitations ................. 63 Exterior dimensions ....................63 Piping system ......................64 Selection chart ......................

  • Page 62: 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 63: Selection Data

    2.2 SELECTION DATA (1) Specifications Model SRK22ZEV-S4 (Indoor unit) SRC22ZEV-S4 (Outdoor unit) (220V) Model SRK22ZEV-S4 SRC22ZEV-S4 Item Cooling capacity 6300 (900~7100) Heating capacity 7100 (900~9000) Power source 1 Phase, 220V, 50Hz Cooling input 1.84 Running current (Cooling) Heating input 1.86 Running current (Heating) Inrush current Cooling: 3.42 Heating: 3.82...

  • Page 64: Range Of Usage & Limitations

    (2) Range of usage & limitations Model SRK22ZEV-S4 Item Cooling operation: Approximately 18 to 32°C Indoor return air temperature (Upper, lower limits) Heating operation: Approximately 15 to 30°C 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 65: Piping System

    (b) Outdoor unit Model SRC22ZEV-S4 Drain holes Unit: mm 2-ø15 25.8 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 Model SRK22ZEV-S4 Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air...

  • Page 66: 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 68: Outline Of Operation Control By Microcomputer

    2.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by remote control switch (a) Wireless remote control Model SRK22ZEV-S4 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 69 (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 70: Unit On/Off Button

    (c) Unit indication section RUN (HOT KEEP) light (green) Model SRK22ZEV-S4 • 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 71: 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 72: 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 73: 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 74 (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 75 (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 76: 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 77: 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 78: 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 79: 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 80 Fan operation1 1) Operation content Inverter command speed 0 rps Indoor fan motor 1st speed Outdoor fan motor Flap and louver Fully closed/ Center (ii) Cooling operation 1) Operation content Note (1) During cooling operation safety control,frost Inverter command speed 20 rps prevention control, and cooling overload Indoor fan motor...

  • Page 81: Economy Operation

    (iv) Fan operation2 (v) Standby operation 1) Operation content 1) Operation content Inverter command speed Inverter command speed 0 rps 0 rps Indoor fan motor Indoor fan motor Outdoor fan motor Outdoor fan motor 2nd speed Determined by stop mode Flap and louver Fully closed/ Center Flap and louver...

  • Page 82: 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 83: 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 84 ◆ < 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 temperature is less than 5°C. 2 When the inverter command speed is more than 20 rps.
  • Page 85 ◆ < 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 86 (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 87 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. 1) Inverter command speed is higher than 60 rps 2) During cooling, dehumidifying: Indoor heat exchanger temperature–Room temperature > –4ºC During heating: Indoor heat exchanger temperature–Room temperature <...
  • Page 88 (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 89 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 90: Application Data

    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 91: 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 92: 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 horizontal...
  • Page 93 (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 94 [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 95: 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 96: 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 97 (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 (220V) Model SRK22ZEV-S4 Item – Cooling High pressure (MPa) Heating 2.5~2.7 Cooling 0.8~1.0 Low pressure (MPa) –...

  • Page 98: 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 99: Installation Of Wired Remote Control And Super Link Adapter (Sc-Ad-E) (Optional Parts)

    (7) Installation of wired remote control (iv) Cut the jumper attached on the board. and super link adapter (SC-AD-E) • Remove the upper box. Remove the screw, the latch and the band. (Optional parts) (a) Modifying the indoor unit’s printed circuit Screw board Band...
  • Page 100 (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 101 (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 102 (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 103 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 104 (iv) Changing the remote control’s temperature setting range 1) The temperature setting range of the remote control can be changed. Through remote control button operations, the upper limit and lower limit set temperature values can be changed indi- vidually. 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 105 (d) SUPER LINK ADAPTER (SC-AD-E) (i) Functions 1) Transmits the settings from the Super link option to the indoor units. 2) Returns the priority indoor unit data in response to a data request from the Super link option. 3) Inspects the error status of connected indoor units and transmits the inspection codes to the Super link option. 4) A maximum of 16 units can be controlled (if in the same operation mode).

  • Page 106: Maintenance Data

    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 107 (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 107. Is an error code displayed by Using the Service Mode, access the self-diagnosis the self-diagnosis function?
  • Page 108 (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 109 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 110 *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 111 2 Stop data Remote control setting Displayed data Temperature Operation Fan speed 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 112 Number of flashes when in service mode Stop code Error content Auto Error Occurrence conditions Cause TIMER recovery display light light Error code Minor category (10’s digit) Major category (1’s digit) Current Overcharge Cooling overload 1 4 time 1 time When there is a current safe stop in overload 1 mode safe Compressor lock...
  • Page 113 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 114 (v) Room temperature sensor temperature, indoor heat exchanger sensor temperature, outdoor air temperature 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 115 (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 116 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 117 (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 118 [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 119 [Gas shortage, defective discharge Over heat of compressor pipe sensor] Is discharge pipe sensor Connector connection check, resistance value check, replacement of discharge pipe resistance value good? sensor (page 116) Check if there are any Does trouble persist after Is sufficient quantity of refrigerant places where gas is leaking.
  • Page 120 [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 t h e D C fa n m o t o r a n d outdoor unit circuit board Replace outdoor fan motor separately.
  • Page 121 (ii) Outdoor unit Phenomenon Operation Sensor Shortcircuit Broken wire mode 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 122 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 124 ◆ 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.

  • Page 125: 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 126: Parts List

    PARTS LIST INDOOR UNIT SRK13ZEV-S4, SRK22ZEV-S4 OUTDOOR UNIT SRC13ZEV-S4, SRC22ZEV-S4...
  • Page 127 PANEL & FAN ASSY CRAE0170 - 126 -...
  • Page 128 SRK13ZEV-S4 END ITEM NO. : RMA002F004A Recommendable Purchased Q'ty Part NO. Part Name RE.Q Note 1000 1-5 RKT102A750B PANEL ASSY,FRONT 1 RKT122A600B PANEL,FRONT 2 RKT435A600C PANEL AIR, INLET 3 RKT435A601 GRILLE, AIR IN (TOP) 4 RKT437A600 FILTER,AIR 5 RKT129A607 HOLDER, FILTER...
  • Page 129 HEAT EXCH. & CONTROL CRAE0171 - 128 -...
  • Page 130 SRK13ZEV-S4 END ITEM NO. : RMA002F004A Recommendable Purchased Q'ty Part NO. Part Name RE.Q Note 1000 1-9 RKT301A506D HEAT EXCH ASSY (AIR) 2 RKT315D500 HEADER ASSY 3 RKT321A501A PIPE ASSY 4 RKT315A500 DISTRIBUTOR ASSY 5 RKT129A401 BRACKET(L) 6-8 RKT321A500A PIPE ASSY...
  • Page 131 PANEL & FAN ASSY CRAE0167 - 130 -...
  • Page 132 SRK22ZEV-S4 END ITEM NO. : RMA002F012 Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1-6 RKW102A200D PANEL ASSY,FRONT 1 RKW122A200 PANEL,FRONT 2 RKW435A200D PANEL ASSY AIR IN 3 RKW437A200 FILTER,AIR 4 RKW129A213 HOLDER,FILTER 5 RKW133A202 FILM,CONCEAL 6 RKW129A214 7 RKW132A203 LID(TERMINAL) 8-32 RKW435A202...
  • Page 133 SRK22ZEV-S4 Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 38 RKW129A202 BRACKET MOTOR ( L ) 39 RKS504A601C HARNESS ASSY For fan motor 40 RKW032A200 PLATE,INSTALLATION 41 RKW129A212 COVER(PIPE) 42 RKW132A200 LID(R) 43 RKW132A201 LID(L) 44 SSA913A007A SCREW,TAP - 132 -...
  • Page 134 MEMO - 133 -...
  • Page 135 HEAT EXCH. & CONTROL CRAE0168 - 134 -...
  • Page 136 SRK22ZEV-S4 END ITEM NO. : RMA002F012 Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1-9 RKW301A200A HEAT EXCH ASSY (AIR) 2 RKW315D204 HEADER ASSY 3 RKW129A200 BRACKET(L) 4 RKW315A203 DISTRIBUTOR ASSY 5-7 RKW321A220 PIPE ASSY 6 SSA323F012F UNION, SOLDER For gas 7 SSA323F082A UNION(SLD)
  • Page 137 PANEL & FAN ASSY CRBE0226 - 136 -...
  • Page 138 SRC13ZEV-S4 END ITEM NO. : RMC003F006A Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCN122A001A PANEL,FRONT 2 RCN125A001 PANEL, REAR 3 RCN124A001A PANEL,TOP 4 RCN132A002 PANEL ASSY SERVICE 5 RCN435A001A GRILLE,AIR OUTLET 6 RCN116A002 BRACKET,MOTOR 7 SSA512T061 MOTOR,DC 8 RCN141A001 PLATE...
  • Page 139 HEAT EXCH. & CONTROL （GAS） （LIQ.） 27・28・29 CONTROL ASSY CRBE0229 - 138 -...
  • Page 140 SRC13ZEV-S4 END ITEM NO. : RMC003F006A Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCN301A200D HEAT EXCH ASSY(AIR) 2 RCM304A304 PIPE ASSY 3 SSA382C078 VALVE,S(4WAY) 4-8 RCN304A602 PIPING ASSY (EXPAN) 5 RCN315B001 CAPILLARY,SUB 6 SSA387F031 VALVE,BODY(EXP) 7 SSA325A036 PIPE,SHELL 8 SSA357A005A STRAINER...
  • Page 141 PANEL & FAN ASSY CRBE0207 - 140 -...
  • Page 142 SRC22ZEV-S4 END ITEM NO. : RMC003F017 Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1 RCR122A001 PANEL ASSY, FRONT 2 RCR125A002 PANEL ASSY, REAR 3 RCR124A002 PANEL,ASSY TOP 4 RCR122A004 PANEL ASSY, SERVICE 5 RCR132A001 COVER, FRONT 6 RCR115A001 SUPPORT, CORNER 7 RCR435A001 GRILLE,AIR OUTLET...
  • Page 143 HEAT EXCH. & CONTROL OUTDOOR TEMP SENSOR (TH2) DISCHARGE PIPE SENSOR (TH3) HEAT EXCH. SENSOR (TH1) （LIQ.） （GAS） CONTROL ASSY CRBE0208 - 142 -...
  • Page 144 SRC22ZEV-S4 END ITEM NO. : RMC003F017 Recommendable Purchased Q'ty Part No. Part Name RE.Q Note 1000 1-4 RCR301A001 HEAT EXCH ASSY (AIR) 2 RCR321A046 PIPE ASSY 3-4 RCR321A056 PIPE ASSY 3 RCR315B008 CAPILLARY 4 RCR315B009 CAPILLARY 5 SSA382C078 VALVE, S (4 WAY) 6 RCR116A003A BRACKET(VALVE) 7 RCR381A003...
  • Page 145 ROOM AIR-CONDITIONING TECHNICAL MANUAL & PARTS LIST Manual No. '06·SRK-T·054...

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