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Mitsubishi Heavy Industries SRF50ZIX-S User Manual

Mitsubishi Heavy Industries SRF50ZIX-S
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SERVICE MANUAL
Manual No. '09
SRK/SRF - SM - 082
INVERTER WALL MOUNTED TYPE
AND FLOOR STANDING TYPE
ROOM AIR-CONDITIONER
( Split system, air to air heat pump type )
Wall mounted type
SRK20ZIX-S
25ZIX-S
35ZIX-S
50ZIX-S
60ZIX-S
Floor standing type
SRF25ZIX-S
35ZIX-S
50ZIX-S
updated 25,May,2009
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Mitsubishi Heavy Industries SRF50ZIX-S Specifications

General IconGeneral
Cooling Capacity5.0 kW
Heating Capacity6.0 kW
Energy Efficiency Ratio (EER)3.21
TypeSplit System
RefrigerantR32
Power Consumption (Cooling)1.56 kW
Outdoor Unit Noise Level50 dB(A)
Power Supply220-240V, 50Hz

Summary

1. WALL MOUNTED TYPE(SRK)

1.1 Electrical wiring

Details electrical wiring for the wall-mounted indoor unit.

1.2 Piping system

Explains the refrigerant piping system for wall-mounted units.

1.3 Noise level

Presents noise level data for indoor and outdoor units of wall-mounted type.

1.4 Sensible heat capacity

Provides sensible heat capacity data for wall-mounted units.

1.5 Application data

Covers general application data for wall-mounted units.

1.5.1 Installation of indoor unit

Details the installation process for the indoor unit of wall-mounted type.

1.5.2 Installation of outdoor unit

Details the installation process for the outdoor unit of wall-mounted type.

1.6 Outline of operation control by microcomputer

Explains operation control functions via microcomputer for wall-mounted units.

1 RANGE OF USAGE & LIMITATIONS

2 INDOOR UNIT

2.1 Wall mounted type (SRK)

Specifics for the wall-mounted indoor unit, including specs, dimensions, wiring.

2.2 Floor standing type (SRF)

Specifics for the floor-standing indoor unit, including specs, dimensions, wiring.

3 OUTDOOR UNIT

(1) Exterior dimensions

Details exterior dimensions for the outdoor unit.

(2) Electrical wiring

Details electrical wiring for the outdoor unit.

1.1 Electrical wiring

(1) Indoor unit

Details electrical wiring for the indoor unit models SRK20ZIX-S to 60ZIX-S.

1.2 Piping system

Model SRK20ZIX-S, 25ZIX-S, 35ZIX-S

Details the piping system for SRK20/25/35ZIX-S models.

Model SRK50ZIX-S, 60ZIX-S

Details the piping system for SRK50/60ZIX-S models.

1.3 Noise level

(Indoor Unit) Model SRK20ZIX-S

Noise level data for the indoor unit, SRK20ZIX-S.

(Outdoor Unit) Model SRC20ZIX-S

Noise level data for the outdoor unit, SRC20ZIX-S.

Model SRK25ZIX-S

(Indoor Unit) Model SRK25ZIX-S

Noise level data for the indoor unit, SRK25ZIX-S.

(Outdoor Unit) Model SRC25ZIX-S

Noise level data for the outdoor unit, SRC25ZIX-S.

Model SRK35ZIX-S

(Indoor Unit) Model SRK35ZIX-S

Noise level data for the indoor unit, SRK35ZIX-S.

(Outdoor Unit) Model SRC35ZIX-S

Noise level data for the outdoor unit, SRC35ZIX-S.

Model SRK50ZIX-S

(Indoor Unit) Model SRK50ZIX-S

Noise level data for the indoor unit, SRK50ZIX-S.

(Outdoor Unit) Model SRC50ZIX-S

Noise level data for the outdoor unit, SRC50ZIX-S.

Model SRK60ZIX-S

(Indoor Unit) Model SRK60ZIX-S

Noise level data for the indoor unit, SRK60ZIX-S.

(Outdoor Unit) Model SRC60ZIX-S

Noise level data for the outdoor unit, SRC60ZIX-S.

1.4 Sensible heat capacity

Model SRK20ZIX-S

Sensible heat capacity data for SRK20ZIX-S model.

Model SRK25ZIX-S

Sensible heat capacity data for SRK25ZIX-S model.

Model SRK35ZIX-S

Sensible heat capacity data for SRK35ZIX-S model.

Model SRK50ZIX-S

Model SRK50ZIX-S

Sensible heat capacity data for SRK50ZIX-S model.

Model SRK60ZIX-S

Sensible heat capacity data for SRK60ZIX-S model.

1.5.1 Installation of indoor unit

SAFETY PRECAUTIONS

Crucial safety precautions to be followed during indoor unit installation.

INSTALLATION DIRECTIONS

General directions for installing the indoor unit.

INSTALLATION SPACE (INDOOR UNIT)

Specifies the required installation space for the indoor unit.

CAUTIONS FOR INSTALLATION

Important cautions to observe during the installation process.

SELECTION OF INSTALLATION LOCATION

Guidance on selecting an appropriate location for indoor unit installation.

How to remove the front panel

Drilling of holes and fixture of sleeve (Option parts)

Fixing of indoor unit

Drainage

CONNECTION OF REFRIGERANT PIPING

ELECTRICAL WIRING WORK

INSTALLATION TEST CHECK POINTS

Open/close and detachment/attachment of the air inlet panel

Mounting of connecting wires

INSTALLATION OF REMOTE CONTROL SWITCH

Test run

HOW TO RELOCATE OR DISPOSE OF THE UNIT

CONCERNING TERMINAL CONNECTION FOR AN INTERFACE

1.5.2 Installation of outdoor unit

PRECAUTIONS FOR SAFETY

Essential safety precautions for outdoor unit installation.

Check before installation work

Checklist of items to verify before commencing outdoor unit installation.

Accessories for outdoor unit

Lists accessories required for outdoor unit installation.

Option parts

Lists optional parts for outdoor unit installation.

Necessary tools for the installation work

Lists the tools required for outdoor unit installation.

2. REFRIGERANT PIPING WORK

1) Restrictions on unit installation and use

Outlines restrictions for unit installation and usage related to piping.

2) Determination of pipe size

Guidelines for determining the correct refrigerant pipe size.

PRECAUTIONS FOR SAFETY

Crucial safety measures for refrigerant piping work.

1. HAULAGE AND INSTALLATION

2) Portage

Instructions for safely carrying and moving the unit.

3) Selecting the installation location

Guidance on choosing an appropriate installation location for the unit.

4) Installation space

Specifies the required installation space around the unit.

5) Installation

Details the physical installation steps for the unit.

3) Refrigerant pipe wall thickness and material

NOTE

Important note regarding copper pipe selection for R410A.

4) On-site piping work

IMPORTANT

Important step regarding pipe work.

How to remove the side cover

Instructions on removing the side cover for access.

3. DRAIN PIPING WORK

4. ELECTRICAL WIRING WORK

For details of electrical cabling, refer to the indoor unit installation manual.

Refers to indoor unit manual for electrical cabling details.

Power cable, indoor-outdoor connecting wires

INSTALLATION TEST CHECK POINTS

Power cable, indoor-outdoor connecting wires

INSTALLATION TEST CHECK POINTS

After installation

Checks to be performed after the main installation is done.

PRECAUTIONS FOR SAFETY

Check before installation work

Accessories for outdoor unit

Option parts

Necessary tools for the installation work

1) Restrictions on unit installation and use

2) Determination of pipe size

1. HAULAGE AND INSTALLATION

2) Portage

Instructions for safely carrying and moving the unit.

3) Selecting the installation location

Guidance on choosing an appropriate installation location for the unit.

4) Installation space

Specifies the required installation space around the unit.

5) Installation

Details the physical installation steps for the unit.

3) Refrigerant pipe wall thickness and material

NOTE

Important note regarding copper pipe selection for R410A.

4) On-site piping work

IMPORTANT

Important step regarding pipe work.

How to remove the side cover

Instructions on removing the side cover for access.

7) Additional refrigerant charge

(2) Charging refrigerant

Steps for charging refrigerant into the system.

8) Heating and condensation prevention

3. DRAIN PIPING WORK

4. ELECTRICAL WIRING WORK

For details of electrical cabling, refer to the indoor unit installation manual.

Refers to indoor unit manual for electrical cabling details.

Power cable, indoor-outdoor connecting wires

INSTALLATION TEST CHECK POINTS

INSTALLATION TEST CHECK POINTS

After installation

Checks to be performed after the main installation is done.

1.6 Outline of operation control by microcomputer

1.6.1 Operation control function by remote controller

Explains operation control functions via the remote controller.

1.6.2 Unit ON/OFF button

1.6.3 Auto restart function

1.6.4 Custom cord switching procedure

1.6.5 Flap and louver control

1.6.6 Air outlet selection

1.6.7 Timer operation

(1) Comfortable timer setting (ON timer)

Details on setting the comfortable ON timer.

(2) Sleep timer operation

Describes the sleep timer operation.

(3) OFF timer operation

Explanation of how to set the OFF timer.

1.6.8 Installation location setting

(1) Setting

Steps for setting the installation location.

1.6.9 Outline of heating operation

(1) Operation of major functional components in heating mode

Details the operation of key components during heating.

(2) Details of control at each operation mode (pattern)

Explains control details for different operation modes like Fuzzy and Hot Keep.

(3) Defrosting operation

Describes the conditions and process for defrosting operation.

1.6.10 Outline of cooling operation

(1) Operation of major functional components in Cooling mode

Details the operation of key components during cooling.

(2) Detail of control in each mode (Pattern)

Explains control details for cooling operation patterns like Fuzzy.

1.6.11 Outline of automatic operation

(1) Determination of operation mode

How the unit determines the operation mode automatically.

1.6.12 Protective control function

(1) Frost prevention control (During cooling or dehumidifying)

Protective control to prevent frost during cooling or dehumidifying.

(2) Cooling overload protective control

Protective control to prevent overload during cooling operation.

(3) Cooling high pressure control

Protective control to prevent high pressure during cooling operation.

(4) Cooling low outdoor temperature protective control

(5) Heating high pressure control

(6) Heating overload protective control

(7) Heating low outdoor temperature protective control

(8) Compressor overheat protection

(9) Current safe

(10) Current cut

(11) Outdoor unit failure

(12) Indoor fan motor protection

2. FLOOR STANDING TYPE(SRF)

2.1 Electrical wiring

Details electrical wiring for the floor-standing indoor unit.

2.2 Piping system

Explains the refrigerant piping system for floor-standing units.

2.3 Noise level

Presents noise level data for floor-standing units.

2.4 Sensible heat capacity

Provides sensible heat capacity data for floor-standing units.

2.5 Application data

Covers general application data for floor-standing units.

2.5.1 Installation of indoor unit

Details the installation process for the indoor unit of floor-standing type.

2.5.2 Installation of outdoor unit

Details the installation process for the outdoor unit of floor-standing type.

2.6 Outline of operation control by microcomputer

Explains operation control functions via microcomputer for floor-standing units.

2.1 Electrical wiring

(1) Indoor unit

Details electrical wiring for the indoor unit of floor-standing type.

2.2 Piping system

Model SRF25ZIX-S, 35ZIX-S

Details the piping system for SRF25/35ZIX-S models.

Model SRF50ZIX-S

Details the piping system for SRF50ZIX-S model.

2.3 Noise level

(Indoor Unit) Model SRF25ZIX-S

Noise level data for the indoor unit, SRF25ZIX-S.

(Outdoor Unit) Model SRC25ZIX-S

Noise level data for the outdoor unit, SRC25ZIX-S.

Model SRF35ZIX-S

(Indoor Unit) Model SRF35ZIX-S

Noise level data for the indoor unit, SRF35ZIX-S.

(Outdoor Unit) Model SRC35ZIX-S

Noise level data for the outdoor unit, SRC35ZIX-S.

Model SRF50ZIX-S

(Indoor Unit) Model SRF50ZIX-S

Noise level data for the indoor unit, SRF50ZIX-S.

(Outdoor Unit) Model SRC50ZIX-S

Noise level data for the outdoor unit, SRC50ZIX-S.

2.4 Sensible heat capacity

Model SRF25ZIX-S

Sensible heat capacity data for SRF25ZIX-S model.

Model SRF35ZIX-S

Sensible heat capacity data for SRF35ZIX-S model.

Model SRF50ZIX-S

Sensible heat capacity data for SRF50ZIX-S model.

2.5.1 Installation of indoor unit

SAFETY PRECAUTIONS

Crucial safety precautions to be followed during indoor unit installation.

INSTALLATION DIRECTIONS

General directions for installing the indoor unit.

INSTALLATION SPACE (INDOOR UNIT)

Specifies the required installation space for the indoor unit.

CAUTIONS FOR INSTALLATION

Important cautions to observe during the installation process.

SELECTION OF INSTALLATION LOCATION

Guidance on selecting an appropriate location for indoor unit installation.

How to remove the front panel

Drilling of holes and fixture of sleeve (Option parts)

Fixing of indoor unit

Drainage

CONNECTION OF REFRIGERANT PIPING

ELECTRICAL WIRING WORK

INSTALLATION TEST CHECK POINTS

HOW TO RELOCATE OR DISPOSE OF THE UNIT

CONCERNING TERMINAL CONNECTION FOR AN INTERFACE

2.5.2 Installation of outdoor unit

Models SRC25ZIX-S, 35ZIX-S

Installation details for SRC25/35ZIX-S outdoor units.

Model SRC50ZIX-S

Installation details for SRC50ZIX-S outdoor unit.

2.6 Outline of operation control by microcomputer

2.6.1 Operation control function by remote controller

Explains operation control functions via the remote controller.

2.6.2 Unit ON/OFF button

2.6.3 Auto restart function

2.6.4 Custom cord switching procedure

2.6.5 Flap and louver control

2.6.6 Air outlet selection

1.6.7 Timer operation

(1) Comfortable timer setting (ON timer)

Details on setting the comfortable ON timer.

(2) Sleep timer operation

Describes the sleep timer operation.

(3) OFF timer operation

Explanation of how to set the OFF timer.

2.6.8 Outline of heating operation

(1) Operation of major functional components in heating mode

Details the operation of key components during heating.

(2) Details of control at each operation mode (pattern)

Explains control details for different operation modes like Fuzzy and Hot Keep.

(3) Defrosting operation

Describes the conditions and process for defrosting operation.

2.6.9 Outline of cooling operation

(1) Operation of major functional components in Cooling mode

Details the operation of key components during cooling.

(2) Detail of control in each mode (Pattern)

Explains control details for cooling operation patterns like Fuzzy.

1.6.10 Outline of automatic operation

(1) Determination of operation mode

How the unit determines the operation mode automatically.

1.6.11 Protective control function

(1) Frost prevention control (During cooling or dehumidifying)

Protective control to prevent frost during cooling or dehumidifying.

(2) Cooling overload protective control

Protective control to prevent overload during cooling operation.

(3) Cooling high pressure control

Protective control to prevent high pressure during cooling operation.

(4) Cooling low outdoor temperature protective control

(5) Heating high pressure control

(6) Heating overload protective control

(7) Heating low outdoor temperature protective control

(8) Compressor overheat protection

(9) Current safe

(10) Current cut

(11) Outdoor unit failure

(12) Indoor fan motor protection

3 MAINTENANCE DATA

3.1 Troubleshooting procedures for electrical equipment

Procedures for troubleshooting electrical equipment issues.

(1) Cautions

(2) Items to check before troubleshooting

(3) Troubleshooting procedure (If the air conditioner does not run at all)

(4) Troubleshooting procedure (If the air conditioner runs)

(5) Self-diagnosis table

(6) Service mode (Trouble mode access function)

(b) Service mode display procedure

Step-by-step procedure for displaying service data.

1) Self-diagnosis data

Explanation of self-diagnosis data recorded by the unit.

2) Stop data

(c) Error code, stop code table

(e) Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor table

(f) Discharge pipe sensor table

Sensor error

Indoor fan motor error

Current cut

Current safe stop

Over heat of compressor

Error of signal transmission

Trouble of outdoor unit

◆ Judgment of refrigerant quantity

Outdoor fan motor error

Rotor lock

(8) Phenomenon observed after shortcircuit, wire breakage on sensor

(a) Indoor unit

Phenomena observed in the indoor unit.

(b) Outdoor unit

(9) Checking the indoor electrical equipment

(a) Indoor PCB check procedure

Procedure for checking the indoor PCB.

(b) Indoor unit fan motor check procedure

Procedure for checking the indoor unit fan motor.

Check point of outdoor unit

Power source and serial signal inspection

Checks for power source and serial signal connections on the outdoor unit.

Inspection of resistance value of sensor

Procedure to inspect sensor resistance values.

Inspection power transistor

Procedure to inspect the power transistor.

Inspection of electronic expansion valve

Procedure to inspect the electronic expansion valve.

Inspection of outdoor fan motor

Procedure to inspect the outdoor fan motor.

(10) Outdoor unit inspection points

(a) Inspection of electronic expansion valve

• Inspection of electronic expansion valve as a separate unit

Procedure for inspecting the electronic expansion valve independently.

(b) Outdoor unit fan motor check procedure

(1) Outdoor PCB output check

Steps to check the outdoor PCB output.

(2) Fan motor resistance check

Procedure to check the fan motor's resistance.

3.2 Servicing

(1) Evacuation

Procedure for purging impurities using a vacuum pump.

(2) Refrigerant charge

Steps for charging refrigerant into the system.

4 REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL FOR AIR CONDITIONERS USING R410A

4.1 Outline

Provides an overview of refrigerant R410A and its characteristics.

4.1.1 Refrigerant R410A

Details on the adoption and properties of R410A refrigerant.

4.1.2 Safety during installation/servicing

Safety precautions for R410A installation and servicing.

4.2 Refrigerant piping installation

Covers the installation of refrigerant piping.

4.2.1 Piping materials and joints used

Specifies materials and joints for refrigerant piping.

(2) Joints

4.2.2 Processing of piping materials

(1) Flare processing procedures and precautions

Steps and precautions for flare processing of pipes.

d) Flare processing

(2) Flare connecting procedures and precautions

4.2.3 Storage of piping materials

(1) Types and storage of piping materials

Classification and storage methods for refrigerant piping materials.

(2) Identification

(3) Precautions before installation

4.2.4 Brazing

(1) Processing the connected parts

Procedures for processing connected parts for brazing.

(2) Brazing filler metal

Details on different types of brazing filler metals.

(3) Flux

(4) Brazing

<Brazing method for preventing oxidation>

Method for preventing oxidation during the brazing process.

* Cautions during brazing

4.3 Installation, removal and servicing

4.3.1 Tools for R410A

Lists tools specifically required for R410A systems.

(1) Tools exclusive for R410A

a) Gauge manifold

Details about the gauge manifold for R410A.

b) Charge hose

Details about pressure-resistant charge hoses for R410A.

c) Electronic balance for refrigerant charging

Details about electronic balance for accurate refrigerant charging.

d) Torque wrench (for nominal diameters 1/2 and 5/8)

Torque wrench specifications for R410A flare nut connections.

(2) General tools

(3) Applicability of R410A tools to R22 model

e) Flare tool (clutch type)

f) Gauge for projection adjustment

g) Vacuum pump adapter

h) Refrigerant cylinder

i) Charge port and packing for refrigerant cylinder

j) Gas leakage detector

4.3.2 New installation work (when using new refrigerant piping)

(1) Air purge by vacuum pump and gas leakage inspection (see Fig. 6)

Steps for air purging and gas leakage inspection using a vacuum pump.

4.3.3 Removal (When using new refrigerant piping)

(1) Removing the unit

Procedure for removing the unit, including refrigerant recovery.

(2) Installing the unit

Steps for installing the unit following new installation procedures.

4.3.4 Replacing the unit (Never use the existing refrigerant piping)

4.3.5 Retrofitting

4.3.6 Refrigerant recharging at servicing

(1) Evacuation

Procedure for purging impurities using a vacuum pump.

(2) Preparations for recovering procedures

Steps to prepare for refrigerant recovery equipment.

(3) Connection of refrigerant recovering equipment

How to connect refrigerant recovering equipment.

(4) Recovering procedures

4.4.2 Accessories/tools

(1) Recovering cylinder

Details on types and usage of recovering cylinders.

(2) Drier

Information on the desiccant container for R410A recovery.

(3) Connection hose

Details on connection hoses for refrigerant recovery.

b) Charge hose (pressure resistant hose for fluorocarbon) and packing

(4) Gauge manifold

(5) Tube piercing valve

(6) Vacuum pump

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