Mitsubishi Heavy Industries SCM30ZS-W Service Manual
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Mitsubishi Heavy Industries SCM30ZS-W Service Manual

Mitsubishi Heavy Industries SCM30ZS-W Service Manual

Inverter multi-split system residential air-conditioners, split system, air to air heat pump type, outdoor/indoor unit, wall mounted type
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SERVICE MANUAL
INVERTER MULTI-SPLIT SYSTEM
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
(OUTDOOR UNIT)
SCM30ZS-W
41ZS-W
(INDOOR UNIT)
Wall mounted type
SRK15ZS-WF,-WFB,-WFT
20ZS-W,-WB,-WT,-WF,-WFB,-WFT
25ZS-W,-WB,-WT,-WF,-WFB,-WFT
35ZS-W,-WB,-WT,-WF,-WFB,-WFT
SKM15ZSP-W
20ZSP-W
25ZSP-W
35ZSP-W
Manual No.'22・SCM-SM-367

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Summary of Contents for Mitsubishi Heavy Industries SCM30ZS-W

  • Page 1 Manual No.'22・SCM-SM-367 SERVICE MANUAL INVERTER MULTI-SPLIT SYSTEM RESIDENTIAL AIR-CONDITIONERS (Split system, air to air heat pump type) (OUTDOOR UNIT) SCM30ZS-W 41ZS-W (INDOOR UNIT) Wall mounted type SRK15ZS-WF,-WFB,-WFT 20ZS-W,-WB,-WT,-WF,-WFB,-WFT 25ZS-W,-WB,-WT,-WF,-WFB,-WFT 35ZS-W,-WB,-WT,-WF,-WFB,-WFT SKM15ZSP-W 20ZSP-W 25ZSP-W 35ZSP-W...

  • Page 3: Table Of Contents

    '22 • SCM-SM-367 CONTENTS 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ....4 1.1 SRK-ZS series ....................4 (1) Operation control function by wireless remote control ........4 (2) Unit ON/OFF button ..................5 (3) Auto restart function ...................5 (4) Installing two air-conditioners in the same room ..........5 (5) Selection of the annual cooling function ............6...
  • Page 4 '22 • SCM-SM-367 (10) Outline of dehumidifying (DRY) operation ..........18 (11) Outline of automatic operation ..............18 (12) Protection control function ...............19 1.3 Outdoor units ...................20 1.3.1 Outline of heating operation ..............20 (1) Summary ....................20 (2) Operation of major functional components in heating mode ....20 (3) Defrost operation ..................20 1.3.2 Outline of cooling operation ..............22 (1) Summary ....................22...
  • Page 5 '22 • SCM-SM-367 (2) Items to check before troubleshooting ............33 (3) Troubleshooting procedure (If the air-conditioner does not run at all) ....33 (4) Troubleshooting procedure (If the air-conditioner runs) ......34 (5) Self-diagnosis table ..................35 (6) Service mode (Trouble mode access function) ...

  • Page 6: Outline Of Operation Control By Microcomputer

    '22 • SCM-SM-367 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.1 SRK-ZS series (1) Operation control function by wireless remote control Transmission section Operation section ON/OFF (luminous) button Press to start operation, press again to stop. OPERATION MODE select button Each time the button is pressed, the FAN SPEED button mode changes.

  • Page 7: Unit On/Off Button

    '09•SRK-DB-087D '09•SRK-DB-087D '22 • SCM-SM-367 (2) Unit ON/OFF button (2) Unit ON/OFF button wireless wireless (a) Operation (a) Operation (b) Details of operation (b) Details of operation room whether to go into the COOL or HEAT modes. Function Room temperature Function Indoor temperature Fan speed Flap/Louver Timer switch...

  • Page 8: Selection Of The Annual Cooling Function

    '22 • SCM-SM-367 J1 用 J3 用 (5) Selection of the annual cooling function Jumper wire (J1) Jumper wire (J3) (a) The annual cooling control is valid from factory default setting. It is possible to disable by cutting jumper wire (J3), or changing the setting of dip switch (SW2- 4) on the interface kit (option) PCB if it is connected.

  • Page 9: Economy Operation

    '22 • SCM-SM-367 (8) Economy operation Pressing the HI POWER/ECONOMY button initiates a soft operation with the power suppressed in order to avoid an excessive cooling or heating. The unit operate 1.5℃ higher than the setting temperature during cooling or 2.5℃ lower than that during heating. The wireless remote control displays ECONOMY mark and the FAN SPEED display disappears.

  • Page 10: Auto Operation

    control display Left approx. 50° Left approx. 20° Center Right approx. 20° Right approx. 50° Center installation Right end installation Left approx. 50° Left approx. 45° Left approx. 30° Center Right approx. 20° '22 • SCM-SM-367 Left approx. 20° Center Right approx.

  • Page 11: Timer Operation

    Cooling Heating '22 • SCM-SM-367 Flap Up/down swing Louver Center (Fixed) Cooling Heating Flap Horizontal blowing (Fixed) Slant forwardl blowing (Fixed) Louver Wide (Fixed) room Operation mode Air flow direction contorol < = < = Room temp. – Setting temp. 2°C 2°C <...

  • Page 12: Outline Of Heating Operation

    (d) Countermeasure for excessive temperature rise Outdoor fan motor (18) Outline of heating operation (few minutes ON) If it feels excessive temperature rise in heating operation, setting temperature can be lower. 4-way valve (3 minutes ON) (a) Operation of major functional components in heating mode '22 •...

  • Page 13: Display Brightness Adjustment

    (Center installation) (Right end installation) (Left end installation) '22 • SCM-SM-367 Air flow range Air flow range Air flow range (Left end installation) (Center installation) (Right end installation) (iv) Press the ON/OFF button. (16) Display brightness adjustment This function can be used when it is necessary to adjust the brightness of unit display. Brightness level Run light Timer light...

  • Page 14: Outline Of Dehumidifying (Dry) Operation

    '22 • SCM-SM-367 '09•SRK-DB-087D (19)　Outline of dehumidifying (DRY) operation (d) Countermeasure for excessive temperature rise If it feels excessive temperature rise in heating operation, setting temperature can be lower. (a) Purpose of DRY mode The purpose is "Dehumidification", and not to control the humidity to the target condition. Indoor/outdoor unit control the operation condition to reduce the humidity, and also prevent over cooling.

  • Page 15: Protective Control Function

    '09•SRK-DB-087D '22 • SCM-SM-367 (iii) Reset conditions: When either of the following condition is satisfied. The outdoor air temperature (TH2) becomes 6ºC ~ 11ºC. (21) Protective control function The compressor command speed is 0 rps. (a) Dew prevention control (During cooling) Prevents dewing on the indoor unit Compressor overheat protection Purpose:...

  • Page 16: Skm-Zsp Series

    '22 • SCM-SM-367 1.2 SKM-ZSP series (1) Operation control function by wireless remote control Remote control ◆ Operation section FAN SPEED button OPERATION MODE select button Each time the button is pressed, the Each time the button is pressed, the fan speed changes.

  • Page 17: Unit On/Off Button

    '22 • SCM-SM-367 (2) Unit ON/OFF button When the wireless remote control batteries become weak, or if the wireless remote control is lost or malfunctioning, this button may be used to turn the unit on and off. (a) Operation Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off. (b) 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 COOL or HEAT modes.

  • Page 18: High Power Operation

    '22 • SCM-SM-367 (5) High power operation Pressing the HI POWER/ECONO button intensifies the operating power and initiates powerful cooling and heating operation for 15 minutes continuously. The wireless remote control displays HIGH POWER mark and the FAN SPEED display disappears. (a) During the HIGH POWER operation, the room temperature is not controlled.

  • Page 19: Timer Operation

    '22 • SCM-SM-367 (b) Swing Flap moves in upward and downward directions continuously. ◆ In HEAT operation ◆ In COOL, DRY, FAN operation Approx. 20° Approx. 35° Approx. 59° Approx. 65° (c) Memory flap When you press the AIR FLOW (UP/DOWN) button once while the flap is operating, it stops swinging at the position. Since this angle is memorized in the microcomputer, the flap will automatically be set at this angle when the next opera- tion is started.

  • Page 20: Outline Of Dehumidifying (Dry) Operation

    '22 • SCM-SM-367 (10) Outline of dehumidifying (DRY) operation (a) Purpose of DRY mode The purpose is "Dehumidification", and not to control the humidity to the target condition. Indoor/outdoor unit control the operation condition to reduce the humidity, and also prevent over cooling. (b) Outline of control (i) Indoor unit fan speed and compressor are controlled by the area which is selected by the temperature difference.

  • Page 21: Protection Control Function

    '22 • SCM-SM-367 (d) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals of the wireless remote control and the setting temperature. Signals of wireless remote control (Display) –6 –5 –4 –3 –2...

  • Page 22: Outdoor Units

    1.3 Outdoor units 1.3.1 Outline of heating operation (1) Summary (a) Capacity control Model SCM30ZS-W SCM41ZS-W 1.0 5.7 kW 1.0 6.9 kW Capacity Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capac- ity of the outdoor unit, the demand capacity will be proportionally distributed.
  • Page 23 '22 • SCM-SM-367 ● SCM30 Defrost operation start Outdoor air temperature (℃) ● SCM41 Accumulated compressor operation time : After 150 minutes : Less than 150 minutes Defrost operation Defrost operation start Defrost operation start Heating operation Max. 10 minutes 2~7 minutes※...

  • Page 24: Outline Of Cooling Operation

    '22 • SCM-SM-367 1.3.2 Outline of cooling operation (1) Summary (a) Capacity control Model SCM30ZS-W SCM41ZS-W 1.4 5.0 kW 1.4 6.3 kW Capacity Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capacity of the outdoor unit, the demand capacity will be proportionally distributed.

  • Page 25: Cooling High Pressure Control

    thermostat OFF, the speed is reduced to 0 rps. (c) Reset conditions '22 • SCM-SM-367 (ii) command (2) Cooling high pressure control (a) Purpose (b) Detector TH5(Tho-R2) (c) Detail of operation After lapse of 30 sec. or over 8rps (Example) Fuzzy 8rps After lapse of 30 sec.

  • Page 26: Heating High Pressure Control

    '22 • SCM-SM-367 (c) Reset conditions When the either of the following conditions is satisfied (i) When the outdoor air temperature (TH2(Tho-A)) becomes 25°C or higher. (ii) When the compressor command speed is 0rps. (4) Heating high pressure control (a) Starting conditions When the indoor heat exchanger temperature (Th2 (Thi-R1)) has risen to a specified temperature while the compressor is turned on.

  • Page 27: Heating Low Outdoor Air Temperature Protective Control

    Range ① Lower limit Range ② '22 • SCM-SM-367 Outdoor air temperature Room air temperature (°C) (°C) ● SCM30 Unit: rps Item ① ② Comperssor command speed Release ● SCM41 Unit: rps (6) Heating low outdoor air temperature protective control Item ①...

  • Page 28: Refrigeration Cycle System Protective Control

    '22 • SCM-SM-367 Refrigeration cycle system protective control Refrigeration cycle system protective control SCM30 SCM30 (a) Starting conditions (a) Starting conditions When A minutes have elapsed after the compressor ON or the completion of the defrost operation When A minutes have elapsed after the compressor ON or the completion of the defrost operation (ii) (ii) Other than the defrost operation...

  • Page 29: Service Valve (Gas Side) Closing Operation

    '22 • SCM-SM-367 (8) Service valve (gas side) closing operation (a) Starting conditions (i) Operation mode : Heating (ii) Compressor conditions : OFF → ON (b) Contents control If the output current of inverter exceeds the specifications, it makes the compressor stopping. (c) Anomalous stop control If the inverter output current value excceds the setting value within 80 seconds the compressor stops.

  • Page 30: Current Safe

    SCM100, 125 20 rps 22 rps (ii) '22 • SCM-SM-367 (10) Current safe (a) Purpose (b) Detail of operation command (ii) command (C) Current safe control value Set this using the jumper wire (J1 or J2) on the outdoor unit PCB. Control starts when it exceeds the control value. 1) Switching with jumper wire Jumper wire (J2) Short-circuit...

  • Page 31: Discharge Pipe Temperature Sensor Disconnection Protective Control

    (b) Once the unit is stopped by this function, it is not restarted. ● Values of A, B Model SCM30ZS-W SCM41ZS-W 30 rps 60 rps Note: When the jumper wire (JA32) on the outdoor unit sub-PCB (refer to page 32.) is short-circuited (factory default), this control is performed only at initial operation after turning the power source on.

  • Page 32: Outdoor Fan Control At Low Outdoor Temperature

    (16) Rotor lock (16) Rotor lock '22 • SCM-SM-367 (17) Outdoor fan motor protection (17) Outdoor fan motor protection (18) Outdoor fan control at low outdoor temperature (18) Outdoor fan control at low outdoor temperature Cooling Cooling Operating conditions Operating conditions TH2(Tho-A) TH2(Tho-A) (ii)
  • Page 33 '22 • SCM-SM-367 (19) Outdoor fan control at overload (a) Cooling (i) Starting conditions When the outdoor air temperature (TH2(Tho-A)) has risen higher than 41°C for 30 seconds continuously while the com- pressor is operating. Under control Normal operation Outdoor air temperature(ºC) (ii) Contents of control The outdoor fan is stepped up by 3 speed.

  • Page 34: Limit Of The Number Of Compressor Starts

    '22 • SCM-SM-367 (20) Limit of the number of compressor starts Maximum number of compressor starts is limited to 6 times per hour by cutting jumper wire (JA31) on the outdoor unit sub PCB. JA33 JA34 JA32 JA35 JA31 JA36 Jumper wire JA32 Jumper wire JA31...

  • Page 35: Maintenance Data

    '22 • SCM-SM-367 2. MAINTENANCE DATA (1) Cautions (1) Cautions (2) Items to check before troubleshooting (2) Items to check before troubleshooting source source (3) Troubleshooting procedure (If the air-conditioner does not run at all) (3) Troubleshooting procedure (If the air-conditioner does not run at all) satisfied satisfied Important...

  • Page 36: Troubleshooting Procedure (If The Air-Conditioner Runs)

    '22 • SCM-SM-367 (4) Troubleshooting procedure (If the air-conditioner runs) 36−42. 36−42.

  • Page 37: Self-Diagnosis Table

    '22 • SCM-SM-367 (5) Self-diagnosis table Wired Indoor unit display panel remote Description Cause Display (flashing) condition control TIMER of trouble display light light • Broken heat exchanger When a heat exchanger temperature sensor 1 wire disconnection is Heat exchanger 1-time temperature sensor 1 wire, detected while operation is stopped.

  • Page 38: Service Mode (Trouble Mode Access Function)

    '22 • SCM-SM-367 (6) Service mode (Trouble mode access function) (a) Explanation of terms Explanation Term The service mode is the mode where service data are displayed by flashing of the display lights Service mode when the operations in item (b) below are performed with the indoor control. These are the contents of error displays and protective stops which occurred in the past in the air- conditioner system.
  • Page 39 '09•SRK-DB-087D '22 • SCM-SM-367 4-time flash 2-time flash. wireless mode mode Self-diagnosis data data? wireless mode mode Wireless remote control setting Contents of output data Fan speed mode Operation mode wireless Indicates the number of Wireless remote control setting occasions previous to the present Temperature setting the error display data are from.

  • Page 40: Displayed Data

    '09•SRK-DB-087D '22 • SCM-SM-367 (Example) Wireless remote control setting Operation Displayed data Fan speed Temperature mode mode setting Displays the reason for the stop (error code) the previous time an error was displayed. 21ºC Displays the reason for the stop (error code) 2 times previous when an error was displayed. 22ºC Cooling 23ºC...
  • Page 41 '22 • SCM-SM-367 (c) Error code, stop code table Number of flashes when in service mode Stop code Error Auto TIMER Error content Cause Occurrence conditions display recovery light light Error code (10's digit) (1's digit) Normal Error of wired remote control wiring The wired remote control wire Y is open.
  • Page 42 '09•SRK-DB-087D '22 • SCM-SM-367 4-time flash 2-time flash. (d) Operation mode, Fan speed mode information tables (ii) mode mode Display pattern when Display pattern when Fan speed in service mode in service mode Operation mode mode when when there is an there is an RUN light TIMER light...
  • Page 43 '09•SRK-DB-087D '22 • SCM-SM-367 (e) Temperature information Room air temperature sensor, indoor heat exchanger temperature sensor, outdoor air temperature sensor, outdoor heat exchanger temperature sensor table Unit: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) temperature information Sensor value displayed when the error code is normal...
  • Page 44 '09•SRK-DB-087D '22 • SCM-SM-367 (ii) Discharge pipe temperature sensor table Unit: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) temperature information Sensor value displayed when the error code is normal -64ºC temperature data...
  • Page 45 '09•SRK-DB-087D '22 • SCM-SM-367 Service data record form Wireless r Operation mode Fan speed mode temperature Wireless r temperature temperature temperature temperature Wireless r temperature temperature temperature temperature Wireless r temperature temperature temperature temperature Wireless r temperature temperature temperature temperature Wireless r temperature temperature...

  • Page 46: Inspection Procedures Corresponding To Detail Of Trouble

    '22 • SCM-SM-367 (7) Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire, connector poor connection Discharge pipe and power transistor sensor Sensor temperature characteristics Room air temperature, indoor heat exchanger tempe- temperature characteristics rature, outdoor heat exchanger temperature, outdoor air temperature, outdoor suction pipe temperature - 10...

  • Page 47: Current Cut

    '22 • SCM-SM-367 Current cut Compressor lock, Compressor wiring short circuit, Compressor output is open phase, Outdoor unit PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty. unit sub unit ＊   main ＊ unit main SCM30, 41 : 1.860Ω(U-V), 1.860Ω(V-W), 1.860Ω(W-U) or more at 20ºC Current safe stop Overload operation, compressor lock, overcharge...
  • Page 48 '22 • SCM-SM-367 Over heat of compressor Gas shortage, defective discharge pipe temperature sensor temperature temperature unit main Error of signal transmission Wiring error including power cable, defective indoor/ outdoor unit PCB ② ③ outdoor unit sub ② ③ indoor unit...

  • Page 49: Outdoor Fan Motor Error

    '22 • SCM-SM-367 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor unit PCB source source source source − − − unit sub ◆  unit (1)  main     operation  ...

  • Page 50: Rotor Lock

    '22 • SCM-SM-367 Rotor lock Defective compressor, defective outdoor unit PCB unit main Check coil resistance between terminals. See page 45. Service valve (gas side) closed, Service valve (gas side) closed operation Drain abnormality (SRR only) [Drain piping defective,pump defect, Defective outdoor unit PCB float switch, indoor unit PCB] Indoor unit PCB...

  • Page 51: Checking The Indoor Electrical Equipment

    '22 • SCM-SM-367 (8) Phenomenon observed after short-circuit, wire breakage on sensor (8) Phenomenon observed after short-circuit, wire breakage on sensor (a) Indoor unit (a) Indoor unit Phenomenon Operation Sensor mode Short-circuit Disconnected wire Cooling Room air temperature sensor Heating Freezing cycle system protection trips and stops the compressor.
  • Page 52 Cooling Heat exchanger sensor Heating Defrosting is performed for 10 minutes at approx. 40 minutes. Cooling Ourdoor air '22 • SCM-SM-367 temperature sensor Defrosting is performed for 10 minutes at approx. 40 minutes. Heating Discharge pipe All modes sensor (9) Checking the indoor electrical equipment (a) Indoor unit PCB check procedure Is there voltage between terminal Inspect power source...

  • Page 53: How To Make Sure Of Wireless Remote Control

    Operation SW ON Measure in this section '22 • SCM-SM-367 (10) How to make sure of wireless remote control wireless wireless wireless wireless wireless wireless (SRK-ZS series) (SKM-ZSP series)   Simplified check method of wireless remote control It is normal if the signal transmission section of the wireless remote control emits a whitish light at each transmission on the monitor of digital camera.

  • Page 54: Outdoor Unit Inspection Points

    '22 • SCM-SM-367 '21 • SCM-SM-333 (12) Outdoor unit inspection points (a) Model SCM30ZS-W Color marks Mark Color Black CAUTION- HIGH VOLTAGE ◆Voltage check in sub PCB Blue Brown The normal range is as follows. High voltage is produced in the control box. Don't touch...
  • Page 55 '22 • SCM-SM-367 '21 • SCM-SM-333 (b) Model SCM41ZS-W Color marks Mark Color Black CAUTION- HIGH VOLTAGE ◆Voltage check in sub PCB Blue Brown The normal range is as follows. High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the Display Voltage range...
  • Page 56 '22 • SCM-SM-367 (c) Inspection of electronic expansion valve (ii) (iii) unit (iv) • Inspection of electronic expansion valve as a separate unit Measuring point Resistance when normal (d) Outdoor fan motor check procedure unit unit source ② unit unit Measuring Voltage range when point...

  • Page 57: Wireless Lan Operation Table

    '22 • SCM-SM-367 3. WIRELESS LAN OPERATION TABLE Operation by Operation by remote Function Setting Operation by Smart M-Air wired remote control control (SC-BIKN2) *1 ○ ○ ○ ON/OFF ○ ○ ○ ○ ○ ○ OPERATION AUTO MODE select ○ ○...

  • Page 58: Wireless Lan Interface Setting Manual

    '22 • SCM-SM-367 4. WIRELESS LAN INTERFACE SETTING MANUAL • This chapter applies only to the SRK-ZS series. • This document describes how to connect to network via Wireless LAN. • Read this manual carefully, and store it in a safe place after reading. •...

  • Page 59: Install The Application

    '22 • SCM-SM-367 Preparation before connection Prepare the following items. Server Smartphone (tablet PC) Supported OS Android 8 to 10 iOS 12 to 14 Internet line and communication equipment Smartphone (modem, router, ONU etc.) Application Router (wireless LAN access point) “Smart M-Air”...
  • Page 60 '22 • SCM-SM-367 (3) Creating user account 1) Smartphone setting Turn on Wi-Fi of your smartphone and connect smartphone and router. 2) Application initial setting Initial application settings and the application starts. 3) After startup, the “Language / Time Zone Setting” screen appears.
  • Page 61 '22 • SCM-SM-367 5) The “Startup” screen appears. Tap [Operate Air Conditioner]. 6) The “Log in” screen appears. Tap [Create an Account]. The “Handling of Personal Information” screen appears. Read and check the statement in full. To consent and proceed with using the application tap [Agree].
  • Page 62 '22 • SCM-SM-367 7) The “Create an Account” screen appears. Enter your e-mail address and password Tap the [Create an Account] button. <Note> A password must be between 8 to 16 characters including at least one alphabetic character and one numeric character.
  • Page 63 '22 • SCM-SM-367 the connection method with the wireless remote control (WPS/AP) <Note> If [Find unregistered Air Conditioners] button has been performed correctly. 2) The Wireless LAN connection setting cannot be set whilst the unit is wireless remote control. 3) Select the Wireless LAN connection setting “SL” by pressing the MENU switch on the wireless remote control.
  • Page 64 '22 • SCM-SM-367 (5) Connect the air conditioner to the network. (WPS/AP). See item (A) for WPS, and item (B) for AP. (A) Connect the air conditioner to the network with WPS function 1) Press the WPS button. Press the WPS button on the router*. The buttons WPS button generally look like this.
  • Page 65 '22 • SCM-SM-367 3) Tap the [Enter] button to select the air conditioner you want to add. The following screen will be displayed when registration is complete.
  • Page 66 '22 • SCM-SM-367 (B) Connect the air conditioner to the network with AP 1) Change the Wi-Fi connection destination of your smartphone to enter “Smart M-Air-XXXX”* and KEY. *XXXX indicates the last 4 digits of the MAC address for the air conditioner. 2) On the “Air Conditioner List”...
  • Page 67 '22 • SCM-SM-367 After selecting the network to connect to from the displayed list, the SSID Next, enter your home Wi-Fi network password and tap the at the *If the home Wi-Fi network SSID number is not input automatically then it will need to be entered manually.

  • Page 68: Mac Address

    '22 • SCM-SM-367 (6) SSID, KEY and MAC address method SSID, KEY and MAC address are printed on the label attached to the front of the indoor unit. Attach the label to this manual and keep it. This can also be viewed by scanning the QR code on the label.

  • Page 69: Application Operation Manual

    '22 • SCM-SM-367 5. APPLICATION OPERATION MANUAL Smart M-Air Operation Manual [EN] RKZ012A107D RKZ012A107...
  • Page 70 '22 • SCM-SM-367 Table of contents Application features ..............Manipulation modes ..............Remote operation mode ..............72 Home restricted mode ..............72 Demo mode ..................72 Preparation for use ............... Smartphone setting ................ 73 Application initial setting ..............73 Creating user account ..............
  • Page 71 '22 • SCM-SM-367 Setting Weekly Timer ..............Setting Timer by Specifying Date via Calendar ......Clear the timer set from the calendar ..........101 Displaying Electricity Bill Graph ..........(10) Updating Firmware ............... Main Menu (11) ..................Canceling demo mode ..............

  • Page 72: Application Features

    '22 • SCM-SM-367 (1) Application features You can operate the air conditioner in each room at home or from outside. • Setting operation reservation of every day of the week for each air conditioner • Checking the power consumption of an air conditioner •...
  • Page 73 '22 • SCM-SM-367 Figure 1-1 Figure 1-2 Note Depending on the function of the connected air conditioner, the following operation will not be reflected in the operation of the air conditioner. ・Left/Right, 3D AUTO, Home leave mode, Electricity Bill Graph Depending on the function of the connected air conditioner, the following operation will not appear on the screen: ・Home leave mode setting, LED ON...

  • Page 74: Manipulation Modes

    '22 • SCM-SM-367 (2) Manipulation modes • Remote operation mode This mode allows you to operate the registered air conditioner via the smartphone application when you are out of the office. Also, you can register and operate the air conditioner at home through a smartphone application.

  • Page 75: Preparation For Use

    '22 • SCM-SM-367 (3) Preparation for use • Smartphone setting Turn on Wi-Fi of your smartphone. Figure 3-1 • Application initial setting Tap the Smart M-Air icon. Figure 3-2 The application starts. Figure 3-3 - 7 -...
  • Page 76 '22 • SCM-SM-367 After startup, the “Language/Time Zone Settings” screen appears. Select a language to use in the application. Select a time zone. Select the time zone in which the air conditioner to operate via the application exists. Choose the unit of temperature. Finally, tap on the top right to complete the setting.

  • Page 77: Creating User Account

    '22 • SCM-SM-367 On the startup screen, select a mode to use. ■ Operate Air Conditioner (Remote operation mode) Tap "Operate Air conditioner" for remote control or to use optional functions such as weekly timer. → To “Creating user account” ■...
  • Page 78 '22 • SCM-SM-367 Read the text of Handling of Personal Information to the bottom and check the description. If you agree it and use the application, tap [Agree]. Figure 3-8 The “Create an Account” screen appears. Enter your e-mail address and password and tap the [Create an Account] button.
  • Page 79 '22 • SCM-SM-367 When the pop-up message “Create an Account” appears, tap [OK]. The email containing the URL of the authentication screen will be sent to the email address you entered, so please click the URL within 24 hours to complete the account creation.

  • Page 80: Registering Air Conditioner

    '22 • SCM-SM-367 • Registering air conditioner Use the “Air Conditioner List” screen to register an air conditioner to operate. Tap the "Find unregistered Air Conditioners" button to display air conditioners that are not registered on your smartphone. Figure 3-12 The air conditioner name ( locations) displays ◯...

  • Page 81: Wireless Lan Settings Of Air Conditioner

    '22 • SCM-SM-367 • Wireless LAN settings of air conditioner If your wireless LAN router does not support WPS, manually make wireless LAN settings of your air conditioner. Set the wireless LAN interface to the AP mode, and then change the Wi-Fi connection destination of your smartphone to “Smart-M-Air-XXXX”.
  • Page 82 '22 • SCM-SM-367 When you tap the network you want to set from the displayed list, the SSID appears in the "SSID" entry field at the bottom of the screen, enter "Your home Wi-Fi password" below it, and tap in the top right. If the network you want to set is not displayed in the list, enter "SSID"...

  • Page 83: Naming Air Conditioner

    '22 • SCM-SM-367 • Naming air conditioner If you want to change the name of the air conditioner displayed in the application such as the air conditioner list screen, tap "Details" to display the detailed screen of the air conditioner. Figure 3-19 Press and hold down (1 second) an air conditioner name.
  • Page 84 '22 • SCM-SM-367 Figure 3-21 Enter a new air conditioner name and tap [YES]. Figure 3-22 Figure 3-23 - 16 -...

  • Page 85: Basic Usage

    '22 • SCM-SM-367 (4) Basic usage • Starting / Stopping air conditioner operation To start or stop the operation, tap the [ON] / [OFF] button of the air conditioner that you want to operate on the “Air Conditioner List” screen. When the button color changes, switching is complete.

  • Page 86: Changing Temperature

    '22 • SCM-SM-367 To change the “Operation mode”, tap each mode from “Auto” to “Dry”. appears when the air conditioner is in clean mode. To cancel clean mode, tap appears when the weekly timer is set by this application. appears when the application is used at home where the air conditioner is set and connected to the application.

  • Page 87: Changing Fan Speed And Air Flow Direction

    '22 • SCM-SM-367 When the operation mode is Fan, Set temp. shows "-". Figure 4-5 • Changing fan speed and air flow direction to change settings. Figure 4-6 - 19 -...

  • Page 88: Switching Vacant Property Mode

    '22 • SCM-SM-367 • Switching Vacant Property Mode When Vacant Property Mode is ON, operation mode and Set temp. can be set as follows. ■ Cool : Set temp. 31°C to 33°C (at 1°C intervals) ■ Heat : Set temp. 10°C to 17°C (at 1°C intervals) Only "Cool"...

  • Page 89: Using Favourites

    '22 • SCM-SM-367 (5) Using Favourites Register your desired settings of “Set temp”, “Operation mode”, “Fan”, “Up / Down” and “Left / Right” with Favourite. Tapping the [Favourite] button changes the current settings to the registered settings. On the air conditioner details screen, press and hold down (1 sec) the [Favourite 1] or [Favourite 2] button.
  • Page 90 '22 • SCM-SM-367 When you tap the [Favourite 1] or [Favourite 2] button, the current settings are changed to the favourite settings you tapped. Figure 5-3 - 22 -...
  • Page 91 '22 • SCM-SM-367 To change the name of the "Favourite" button, press and hold down the "Favourite" button for approximately 1 second. "Edit Favourite name" dialog appears to change the name. Figure 5-4 Figure 5-5 - 23 -...
  • Page 92 '22 • SCM-SM-367 Enter the new favourite name and tap [YES]. Figure 5-6 Figure 5-7 - 24 -...

  • Page 93: Using Options

    '22 • SCM-SM-367 (6) Using Options You can make various option settings such as alerts and LED lighting, and check the number of accounts registered with an air conditioner. Home restricted mode : Only “Home Leave Mode”, “Cooling specific” and “LED ON” are operable. Demo mode : Options are not operable.

  • Page 94: Shut-Off Reminder Alert

    '22 • SCM-SM-367 Only "LED ON" is ON by default. Switch between [ON] and [OFF], and tap on the top right of the screen to save the settings you changed. Note • Shut-off reminder alert, AC error notification, Hi temp/low temp alert, Watching function can be used with "Remote operation mode".

  • Page 95: Air Conditioner Error Notification

    '22 • SCM-SM-367 ■ To not to receive alerts, tap [OFF]. When the pop-up message “If your external location is disabled, it cannot be retrieved. Do you want to disable the external location?” appears, tap [YES] and then tap on the top right.

  • Page 96: Hi Temp/Low Temp Alert

    '22 • SCM-SM-367 • Hi temp/low temp alert When the air conditioner reaches the specified high/low temperature condition, a push notification is sent to the smartphone application. ■ To receive alerts, tap [ON] and enter the high and low temperatures and then tap on the top right.

  • Page 97: Watching Function

    '22 • SCM-SM-367 • Watching function When the air conditioner is controlled other than your smartphone, an e-mail is sent to the registered e-mail address. Note Note • The notification also applies to the operation with the timer of the air conditioner itself and the end of internal clean operation.
  • Page 98 '22 • SCM-SM-367 ■ To change the setting of home leave mode, tap . To hide them, . The following settings can be changed. ・Determine temp : Set the preferred outside temperature to start the operation of the air conditioner in cooling/heating mode.

  • Page 99: Cooling Specific

    '22 • SCM-SM-367 • Cooling specific If you set it as an air conditioner for cooling only, you won't be able to use the heating in the smartphone application. ■ To use “Cooling specific”, tap [ON] and then tap on the top right. •...

  • Page 100: Setting Weekly Timer

    '22 • SCM-SM-367 (7) Setting Weekly Timer Makes the timer setting for every day of the week. Tap [Weekly Timer] on the lower part of the air conditioner details screen. The “Weekly Timer” screen appears. Figure 7-1 on the top right of the screen to save the settings you changed. Tap the day of the week you want to set to display the timer list for that day of the week.
  • Page 101 '22 • SCM-SM-367 A disabled timer shows the time and operation mode only. Tap the switch at to enable and edit. Edit each item and tap on the top right to set the timer on the target day. Figure 7-3 When at least one timer setting is ON, the timer icon appears on the air conditioner detail screen.

  • Page 102: Setting Timer By Specifying Date Via Calendar

    '22 • SCM-SM-367 (8) Setting Timer by Specifying Date via Calendar When you set the weekly timer, the same timer is applied to the same day every week. To turn off the timer or set the timer of a different day on a certain day, set individually from the “Calendar”...

  • Page 103: Clear The Timer Set From The Calendar

    '22 • SCM-SM-367 Tap the date of the calendar. Select the timer of the day of the week that you want to apply from “Weekly Timer Settings” and tap on the top right of the screen. If you select “OFF” from “Weekly Timer Settings”, the weekly timer is not applied.
  • Page 104 '22 • SCM-SM-367 From “Weekly Timer Settings”, select the same day of the week as the date to clear and tap Figure 8-4 When cleared, the background of the date is displayed in white. Figure 8-5 - 36 -...

  • Page 105: Displaying Electricity Bill Graph

    '22 • SCM-SM-367 (9) Displaying Electricity Bill Graph Displays an electricity bill by month on a graph. You can also set the electricity unit cost. Note Depending on the type of air conditioner you connect, the function may be disabled. Tap [Electricity Bill Graph] on the lower part of the air conditioner details screen.

  • Page 106: Updating Firmware

    '22 • SCM-SM-367 (10) Updating Firmware If the firmware of your wireless LAN interface is not up to date, an exclamation mark appears on the “Air Conditioner List” screen. ！ Tap [Details] to display the air conditioner details screen. Figure 10-1 Tap the [Firmware update] button.
  • Page 107 '22 • SCM-SM-367 Tap [YES] to update the firmware to the latest one. The firmware update takes 10 minutes (Max). The operation from the application is not accepted during that period. If after 10 minutes (Max) the "Firmware update" button appears, retry the firmware update. Figure 10-3 When the firmware becomes up to date, the firmware version appears instead of the...

  • Page 108: Main Menu

    '22 • SCM-SM-367 (11) Main Menu Tap the menu button ( ) that appears on the top left in the screen such as “Air Conditioner List”, to display the main menu. ■ Air Conditioner List : Operates or sets an Air conditioner.

  • Page 109: Canceling Demo Mode

    '22 • SCM-SM-367 • Canceling demo mode In the demo mode Cancel demo : Exits the demo mode. Figure 11-2 - 41 -...

  • Page 110: Checking Alerts

    '22 • SCM-SM-367 (12) Checking Alerts Open the main menu and tap [Alerts]. Figure 12-1 A list of alerts appears. Tap each alert to display the alert details screen and check it. appears to the alert that is not checked in the alert details screen.
  • Page 111 '22 • SCM-SM-367 Figure 12-3 - 43 -...

  • Page 112: Changing Application Settings

    '22 • SCM-SM-367 (13) Changing Application Settings Open the main menu and tap [App Settings]. Figure 13-1 The “Application Settings” screen appears. ■ Switch Operation Modes: Switches between the remote operation mode and home restricted mode. → To “Switch Operation Modes” ■...

  • Page 113: Switch Operation Modes

    '22 • SCM-SM-367 Note • In "Home restricted mode", you cannot operate "Password Settings". In "Try a Demo", only "Language/Time Zone Settings" and "Application Version Display" can be operated. Functions that cannot be operated are displayed in gray, and nothing is displayed even if you tap them.

  • Page 114: Switching To "Home Restricted Mode

    '22 • SCM-SM-367 When the account creation pop-up message appears, tap [OK], agree with the handling of personal information, and create an account. → To “Creating user account” Figure 13-4 • Switching to “Home restricted mode” Tap [Home restricted mode] → Tap on the top right to switch the mode.
  • Page 115 '22 • SCM-SM-367 The popup for remote control disabled and the popup for deleting server data will appear, so tap [YES]. Figure 13-6 Figure 13-7 When the operation mode switching completion pop-up message appears, tap [OK]. Figure 13-8 - 47 -...

  • Page 116: Reset Password

    '22 • SCM-SM-367 • Reset Password Enter the registered e-mail address and tap the [Issue code] button. Note • After tapping the [Issue code] button, keep this screen displayed until the password resetting is completed. If you tap and return to the previous screen, these operations are canceled.
  • Page 117 '22 • SCM-SM-367 An e-mail with a security code will be sent to the e-mail address you entered. Enter “Security code” and “New password” and tap [Reset Password] ××××××××××@×××××.jp to update your password. Note • A password must be between 8 to 16 012345 characters including at least one alphabetic character and one numeric character.

  • Page 118: Language/Time Zone Settings

    '22 • SCM-SM-367 • Language/Time Zone Settings The “Language/Time Zone Settings” screen appears. Select a language to use in the application. Select a time zone. Select the time zone in which the air conditioner to operate via the application exists. Choose the unit of temperature.

  • Page 119: Application Initialization

    '22 • SCM-SM-367 • Application Initialization Initializes the smartphone application. Note • Note that if you initialize the application in “Remote operation mode”, the information of the account logged in is deleted. Tap [Initialize the application]. Figure 13-14 - 51 -...
  • Page 120 '22 • SCM-SM-367 When the pop-up message “Your account information will be deleted. Do you want to initialize the application?” appears, tap [YES]. Figure 13-15 When the pop-up message "Initialization is complete. Close the application." appears, tap [OK] to close the application. Figure 13-16 - 52 -...

  • Page 121: Application Version Display

    '22 • SCM-SM-367 • Application Version Display Displays the version of your smartphone application. Figure 13-17 - 53 -...

  • Page 122: Troubleshooting

    '22 • SCM-SM-367 (14) Troubleshooting • When the air conditioner that you want to register does not appear in the air conditioner list screen Tap the [Find unregistered Air Conditioners] Button to search unregistered air conditioners and update the “Air Conditioner List” screen. Figure 14-1 When asked for "search your local network"...

  • Page 123: How To Delete A Registered Air Conditioner

    '22 • SCM-SM-367 • How to delete a registered air conditioner To delete a registered air conditioner, press and hold down (2 seconds) the icon of the target air conditioner. Figure 14-3 When the deleting air conditioner pop-up Message appears, tap [YES]. Figure 14-4 - 55 -...

  • Page 124: When An Abnormality Notification Appears In The Air Conditioner List

    '22 • SCM-SM-367 • When an abnormality notification appears in the air conditioner list When an abnormality notification appears, air conditioner abnormality has been detected. Contact your dealer. When “AC error notification” of the option settings is enabled, an e-mail is sent to the registered e-mail address.

  • Page 125: When Operation Is Performed By Another Account

    '22 • SCM-SM-367 • When operation is performed by another account The message shows in the following cases: • When the application is operated from other smartphones at the same time • When the air conditioner is changing its operation status by its set control The equipment is not malfunctioning, so please try again after a while.

  • Page 126: Electrical Wiring

    '22 • SCM-SM-367 6. ELECTRICAL WIRING (1) Outdoor unit (a) Model SCM30ZS-W RWC000Z350...
  • Page 127 '22 • SCM-SM-367 (b) Model SCM41ZS-W RWC000Z352...

  • Page 128: Indoor Unit

    '22 • SCM-SM-367 (2) Indoor unit (a) Wall mounted type (SRK-ZS series) (i) Models SRK20, 25, 35ZS-W, -WB, -WT RWA000Z416...
  • Page 129 ’20 ・SRK -DB-300D '22 • SCM-SM-367 3. ELECTRICAL WIRING (1) Indoor units Models SRK20ZS-W, 25ZS-W, 35ZS-W, 50ZS-W (ii) Models SRK15, 20, 25, 35ZS-WF, -WFB, -WFT SRK20ZS-WB, 25ZS-WB, 35ZS-WB, 50ZS-WB SRK20ZS-WT, 25ZS-WT, 35ZS-WT, 50ZS-WT RWA000Z416 RWA000Z427...
  • Page 130 '22 • SCM-SM-367 (b) Wall mounted type (SKM-ZSP series) Models SKM15, 20, 25, 35ZSP-W RLC000Z110...

  • Page 131: Piping Systems

    '22 • SCM-SM-367 7. PIPING SYSTEMS (1) Model SCM30ZS-W...
  • Page 132 '22 • SCM-SM-367 (2) Model SCM41ZS-W...
  • Page 133 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. 2-3, Marunouchi 3-chome, Chiyoda-ku, Tokyo, 100-8332, Japan http://www.mhi-mth.co.jp/en/ Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

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