Кондиционер mitsubishi srk20hg инструкция по применению

Mitsubishi Heavy Industries

Кондиционеры Mitsubishi Heavy серии SRK 20 HG, SRK 28 HG, SRK 40 HG. Инструкция по эксплуатации.

Бренд: Mitsubishi Heavy Industries

Категория для инструкций: Кондиционеры бытовые

Алфавит (англ.): M

Описание: Кондиционеры Mitsubishi Heavy серии SRK 20 HG, SRK 28 HG, SRK 40 HG. Инструкция по эксплуатации

Размер файла: 11917145 байт

Инструкция на кондиционеры Mitsubishi Heavy серии SRK (20/28/40) HG

Recommended Documentation:

Код: 49136

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• Page 1
  Manual No. ’07 . SRK-T . 068 TECHNICAL MANUAL Collection data WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air to air heat pump type) SRK20HG-S SRK28HG-S SRK40HG-S…
• Page 1
  Manual No. ’07 . SRK-T . 068 TECHNICAL MANUAL Collection data WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air to air heat pump type) SRK20HG-S SRK28HG-S SRK40HG-S…

• Page 2: Table Of Contents

  CONTENTS 1. GENERAL INFORMATION …………….1 Specific features ………………1 How to read the model name …………..1 2. SELECTION DATA ………………2 Specifications ………………. 2 Range of usage & limitations …………..5 Exterior dimensions …………….. 5 Piping system ………………. 7 Selection chart ………………

• Page 2: Table Of Contents

  CONTENTS 1. GENERAL INFORMATION …………….1 Specific features ………………1 How to read the model name …………..1 2. SELECTION DATA ………………2 Specifications ………………. 2 Range of usage & limitations …………..5 Exterior dimensions …………….. 5 Piping system ………………. 7 Selection chart ………………

• Page 3: General Information

  1.1 Specific features The “MITSUBISHI HEAVY INDUSTRIES, LTD.” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor.

• Page 3: General Information

  1.1 Specific features The “MITSUBISHI HEAVY INDUSTRIES, LTD.” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor.

• Page 4: Selection Data

  SELECTION DATA 2.1 Specifications Model SRK20HG-S (Indoor unit) SRC20HG-S (Outdoor unit) (220/230/240V) Model SRK20HG-S SRC20HG-S Item Cooling capacity 2070 Heating capacity 2220 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 0.64 Running current (Cooling) 3.1/3.0/2.9 Heating input 0.61 Running current (Heating) 3.0/2.9/2.8…

• Page 4: Selection Data

  SELECTION DATA 2.1 Specifications Model SRK20HG-S (Indoor unit) SRC20HG-S (Outdoor unit) (220/230/240V) Model SRK20HG-S SRC20HG-S Item Cooling capacity 2070 Heating capacity 2220 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 0.64 Running current (Cooling) 3.1/3.0/2.9 Heating input 0.61 Running current (Heating) 3.0/2.9/2.8…

• Page 5
  Model SRK28HG-S (Indoor unit) SRC28HG-S (Outdoor unit) (220/230/240V) Model SRK28HG-S SRC28HG-S Item Cooling capacity 2600 Heating capacity 2800 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 0.81 Running current (Cooling) 3.8/3.7/3.6 Heating input 0.77 Running current (Heating) 3.7/3.5/3.3 Inrush current 17.2 Cooling: 3.21 Heating: 3.64 Sound level…
• Page 5
  Model SRK28HG-S (Indoor unit) SRC28HG-S (Outdoor unit) (220/230/240V) Model SRK28HG-S SRC28HG-S Item Cooling capacity 2600 Heating capacity 2800 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 0.81 Running current (Cooling) 3.8/3.7/3.6 Heating input 0.77 Running current (Heating) 3.7/3.5/3.3 Inrush current 17.2 Cooling: 3.21 Heating: 3.64 Sound level…
• Page 6
  Model SRK40HG-S (Indoor unit) SRC40HG-S (Outdoor unit) (220/230/240V) Model SRK40HG-S SRC40HG-S Item Cooling capacity 3600 Heating capacity 3920 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 1.12 Running current (Cooling) 5.3/5.2/5.1 Heating input 1.15 Running current (Heating) 5.4/5.3/5.2 Inrush current 25.2 Cooling: 3.21 Heating: 3.41 Sound level…
• Page 6
  Model SRK40HG-S (Indoor unit) SRC40HG-S (Outdoor unit) (220/230/240V) Model SRK40HG-S SRC40HG-S Item Cooling capacity 3600 Heating capacity 3920 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 1.12 Running current (Cooling) 5.3/5.2/5.1 Heating input 1.15 Running current (Heating) 5.4/5.3/5.2 Inrush current 25.2 Cooling: 3.21 Heating: 3.41 Sound level…

• Page 7: Range Of Usage & Limitations

  2.2 Range of usage & limitations Models All models Item Indoor return air temperature Cooling operation : Approximately 21 to 32˚C Heating operation : Approximately 15 to 30˚C (Upper, lower limits) Outdoor air temperature Cooling operation : Approximately 21 to 43˚C (Upper, lower limits) Heating operation : Approximately — 5 to 21˚C Refrigerant line (one way) length…

• Page 7: Range Of Usage & Limitations

  2.2 Range of usage & limitations Models All models Item Indoor return air temperature Cooling operation : Approximately 21 to 32˚C Heating operation : Approximately 15 to 30˚C (Upper, lower limits) Outdoor air temperature Cooling operation : Approximately 21 to 43˚C (Upper, lower limits) Heating operation : Approximately — 5 to 21˚C Refrigerant line (one way) length…

• Page 8
  (2) Outdoor unit Models All models Drain holes (ø20) 313.1 349.5 439.1 104.9 165.1 18.9 61.9 2-16×12 Terminal block Service valve (Liquid) Flare connection ø6.35 (1/4») 138.4 33.5 Service valve (Gas) Flare connection 20, 28: ø9.52 (3/8») ø12.7 (1/2»)
• Page 8
  (2) Outdoor unit Models All models Drain holes (ø20) 313.1 349.5 439.1 104.9 165.1 18.9 61.9 2-16×12 Terminal block Service valve (Liquid) Flare connection ø6.35 (1/4») 138.4 33.5 Service valve (Gas) Flare connection 20, 28: ø9.52 (3/8») ø12.7 (1/2»)

• Page 9: Piping System

  2.4 Piping system Models SRK20HG-S, 28HG-S, 40HG-S Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connecting Service valve temp. sensor (Gas) Piping Check joint (Gas) ø9.52 4 way valve Accumulator Muffler Room temp. Discharge temp. Heat sensor…

• Page 9: Piping System

  2.4 Piping system Models SRK20HG-S, 28HG-S, 40HG-S Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connecting Service valve temp. sensor (Gas) Piping Check joint (Gas) ø9.52 4 way valve Accumulator Muffler Room temp. Discharge temp. Heat sensor…

• Page 10: Selection Chart

  0.92 1.00 How to obtain the cooling and heating capacity Example : The net cooling capacity of the model SRK20HG-S 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 = 2070 0.975…

• Page 10: Selection Chart

  0.92 1.00 How to obtain the cooling and heating capacity Example : The net cooling capacity of the model SRK20HG-S 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 = 2070 0.975…

• Page 12: Outline Of Operation Control By Microcomputer

  OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch Remote control Models All models ◆ Operation selection FAN SPEED button OPERATION MODE select button Each time the button is pushed, the Each time the button pushed, the indicator is switched over in turn.

• Page 12: Outline Of Operation Control By Microcomputer

  OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch Remote control Models All models ◆ Operation selection FAN SPEED button OPERATION MODE select button Each time the button is pushed, the Each time the button pushed, the indicator is switched over in turn.

• Page 13: Unit On/Off Button

  Unit indication selection Models All models RUN light (green) Illuminates during operation and CLEAN operation. TIMER light (yellow) Illuminates during TIMER operation. TIME HI POWE ECONO ON / OFF HI POWER light (green) Illuminates during HIGH POWER operation. ECONO light (orange) Illuminates during ECONOMY operation.

• Page 13: Unit On/Off Button

  Unit indication selection Models All models RUN light (green) Illuminates during operation and CLEAN operation. TIMER light (yellow) Illuminates during TIMER operation. TIME HI POWE ECONO ON / OFF HI POWER light (green) Illuminates during HIGH POWER operation. ECONO light (orange) Illuminates during ECONOMY operation.

• Page 14: Custom Cord Switching Procedure

  4.4 Custom cord switching procedure If two wireless remote controls are installed in one room, in order to prevent wrong operation Jumper wire (J6) 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.

• Page 14: Custom Cord Switching Procedure

  4.4 Custom cord switching procedure If two wireless remote controls are installed in one room, in order to prevent wrong operation Jumper wire (J6) 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.

• Page 15: Timer Operation

  4.6 Timer operation (1) Comfortable timer setting (ON timer) If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.

• Page 15: Timer Operation

  4.6 Timer operation (1) Comfortable timer setting (ON timer) If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.

• Page 16: Outline Of Heating Operation

  This function controls the indoor unit fan speed as shown below in accordance with the temperature sensed by the indoor heat exchanger sensor. (a) When the compressor and outdoor unit fan are operating Speed 9 Speed 7 Auto fan control, or the set fan speed Speed 5 Speed 3 <SRK20HG-S> <SRK28HG-S> <SRK40HG-S> Indoor heat exchanger temp. (˚C)

• Page 16: Outline Of Heating Operation

  This function controls the indoor unit fan speed as shown below in accordance with the temperature sensed by the indoor heat exchanger sensor. (a) When the compressor and outdoor unit fan are operating Speed 9 Speed 7 Auto fan control, or the set fan speed Speed 5 Speed 3 <SRK20HG-S> <SRK28HG-S> <SRK40HG-S> Indoor heat exchanger temp. (˚C)

• Page 17
  1, 2, 3 (except that the outdoor heat exchanger sensor temperature is –1ºC) and 5 above and the outdoor air temperature is 3˚C or lower (SRK20HG-S only), the defroster operation starts. (b) End conditions (when either of the following conditions is satisfied) 1 Outdoor heat exchanger sensor temperature: 9ºC or higher…
• Page 17
  1, 2, 3 (except that the outdoor heat exchanger sensor temperature is –1ºC) and 5 above and the outdoor air temperature is 3˚C or lower (SRK20HG-S only), the defroster operation starts. (b) End conditions (when either of the following conditions is satisfied) 1 Outdoor heat exchanger sensor temperature: 9ºC or higher…
• Page 18
  (c) Operation of functinal components during defrosting operation Compressor command Hot keep Controlled by the indoor heat Hot keep exchanger temperature Indoor unit fan The chart at left is for reference. Hot keep control governs operation RUN light during heating. Flashes Outdoor unit fan 110 sec.
• Page 18
  (c) Operation of functinal components during defrosting operation Compressor command Hot keep Controlled by the indoor heat Hot keep exchanger temperature Indoor unit fan The chart at left is for reference. Hot keep control governs operation RUN light during heating. Flashes Outdoor unit fan 110 sec.

• Page 19: Outline Of Cooling Operation

  4.8 Outline of cooling operation (1) Operation of major functional components Item When the compressor When the compressor When the compressor goes Functional command is OFF command is ON OFF due to an anomalous stop. components Indoor fan motor Flaps ON or OFF ON or OFF Stop position control…

• Page 19: Outline Of Cooling Operation

  4.8 Outline of cooling operation (1) Operation of major functional components Item When the compressor When the compressor When the compressor goes Functional command is OFF command is ON OFF due to an anomalous stop. components Indoor fan motor Flaps ON or OFF ON or OFF Stop position control…

• Page 20: Outline Of Dehumidifying Operation

  4.9 Outline of dehumidifying operation (1) Choose the appropriate operation block area by the difference between room temperature and thermostat setting temperature as shown below. ¡ Operation block area D block C block B block A block –2 Room temp. – Setting temp.(deg) (2) Start up operation C.D block A.B block…

• Page 20: Outline Of Dehumidifying Operation

  4.9 Outline of dehumidifying operation (1) Choose the appropriate operation block area by the difference between room temperature and thermostat setting temperature as shown below. ¡ Operation block area D block C block B block A block –2 Room temp. – Setting temp.(deg) (2) Start up operation C.D block A.B block…

• Page 21: Outline Of Automatic Operation

  4.10 Outline of automatic operation (1) Determination of operation mode The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20 seconds, determines the operation mode and the room temperature setting correction value, and then begins in the automatic operation.

• Page 21: Outline Of Automatic Operation

  4.10 Outline of automatic operation (1) Determination of operation mode The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20 seconds, determines the operation mode and the room temperature setting correction value, and then begins in the automatic operation.

• Page 22: Protective Control Function

  ¡ When the indoor heat exchanger ¡ When the indoor heat exchanger temperature is > = 58˚C temperature is > = 62˚C Outdoor fan Compressor <SRK20HG-S> <SRK28HG-S> Indoor heat exchanger temp. (˚C) <SRK40HG-S> Indoor heat exchanger temp. (˚C) (5) Compressor overheat protection If the discharge pipe temperature (sensed by Th6) exceeds the set temperature value, the compressor stops.

• Page 22: Protective Control Function

  ¡ When the indoor heat exchanger ¡ When the indoor heat exchanger temperature is > = 58˚C temperature is > = 62˚C Outdoor fan Compressor <SRK20HG-S> <SRK28HG-S> Indoor heat exchanger temp. (˚C) <SRK40HG-S> Indoor heat exchanger temp. (˚C) (5) Compressor overheat protection If the discharge pipe temperature (sensed by Th6) exceeds the set temperature value, the compressor stops.

• Page 23
  (6) Serial signal transmission error protection (a) Purpose: Prevents malfunction resulting from error on the indoor ↔ outdoor signals. (b) Detail of operation: When the indoor unit controller ↔ outdoor unit controller signals cannot be received, the compressor is stopped immediately. Simultaneously, the red LED on the printed circuit board of outdoor unit controller flashing 6 times for 0.5 second at intervals of 8 seconds.
• Page 23
  (6) Serial signal transmission error protection (a) Purpose: Prevents malfunction resulting from error on the indoor ↔ outdoor signals. (b) Detail of operation: When the indoor unit controller ↔ outdoor unit controller signals cannot be received, the compressor is stopped immediately. Simultaneously, the red LED on the printed circuit board of outdoor unit controller flashing 6 times for 0.5 second at intervals of 8 seconds.

• Page 24: Application Data

  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 24: Application Data

  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 25: Selection Of Location For Installation

  5.1 Selection of location for installation (1) Indoor unit Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (b) A solid place where the unit or the wall will not vibrate. Right A place where there will be enough space for servicing.

• Page 25: Selection Of Location For Installation

  5.1 Selection of location for installation (1) Indoor unit Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (b) A solid place where the unit or the wall will not vibrate. Right A place where there will be enough space for servicing.

• Page 26: Installation Of Indoor Unit

  5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW) Look for the inside wall structures (Intersediate support or pillar and firaly install the unit after level surface has been Unit : mm checked.) Space for…

• Page 26: Installation Of Indoor Unit

  5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW) Look for the inside wall structures (Intersediate support or pillar and firaly install the unit after level surface has been Unit : mm checked.) Space for…

• Page 27
  (3) Preparation of indoor unit (a) Mounting of connecting wires 1) Remove the lid(R). 2) Remove the wiring clamp. 3) Connect the connecting wire securely to the terminal block. Terminal block Use cables for interconnection wiring to avoid loosening of the wires.
• Page 27
  (3) Preparation of indoor unit (a) Mounting of connecting wires 1) Remove the lid(R). 2) Remove the wiring clamp. 3) Connect the connecting wire securely to the terminal block. Terminal block Use cables for interconnection wiring to avoid loosening of the wires.
• Page 28
  [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 28
  [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 29: Installation Of Outdoor Unit

  5.3 Installation of outdoor unit (1) Installation of outdoor unit Make sure that the unit is stable in installation. Fix the unit to stable base. When installing the unit at a higher place or where it could be toppled by strong winds, secure the unit firmly with foundation bolts, wire, etc.

• Page 29: Installation Of Outdoor Unit

  5.3 Installation of outdoor unit (1) Installation of outdoor unit Make sure that the unit is stable in installation. Fix the unit to stable base. When installing the unit at a higher place or where it could be toppled by strong winds, secure the unit firmly with foundation bolts, wire, etc.

• Page 30
  (3) Air purge Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak. Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below. Open manifold valve handle Lo to its full width, and perform vacuum or evacuation. Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads –…
• Page 30
  (3) Air purge Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak. Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below. Open manifold valve handle Lo to its full width, and perform vacuum or evacuation. Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads –…

• Page 31: Test Run

  (3) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (4) Make sure that drain flows properly. (5) Standard operation data (220/230/240V) Model SRK20HG-S SRK28HG-S SRK40HG-S Item – –…

• Page 31: Test Run

  (3) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (4) Make sure that drain flows properly. (5) Standard operation data (220/230/240V) Model SRK20HG-S SRK28HG-S SRK40HG-S Item – –…

• Page 32: Maintenance Data

  MAINTENANCE DATA 6.1 Trouble shooting (1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models] All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it is necessary to understand the function controlled by a microcomputer thoroughly, so as not to mistakenly identify correct operations as mis-operations.

• Page 32: Maintenance Data

  MAINTENANCE DATA 6.1 Trouble shooting (1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models] All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it is necessary to understand the function controlled by a microcomputer thoroughly, so as not to mistakenly identify correct operations as mis-operations.

• Page 33
  (2) Self diagnosis display on indoor unit RUN light Outdoor unit LED Trouble Cause ¡ Broken heat exchanger sensor wire, connector Heat exchanger sensor error 1 time flash poor connection ¡ Broken room temperature sensor wire, connector TIMER light Room temperature sensor error 2 time flash poor connection ¡…
• Page 33
  (2) Self diagnosis display on indoor unit RUN light Outdoor unit LED Trouble Cause ¡ Broken heat exchanger sensor wire, connector Heat exchanger sensor error 1 time flash poor connection ¡ Broken room temperature sensor wire, connector TIMER light Room temperature sensor error 2 time flash poor connection ¡…
• Page 34
  [Compressor faulty, compressor Trouble of outdoor unit wiring disconnected.] Short circuit, Check if the heat Overload operation? exchanger is dirty, stopped up, etc. Is the refrigerant level proper? Adjust the level to the proper level. Is the wiring to the compressor Connect it securely.
• Page 34
  [Compressor faulty, compressor Trouble of outdoor unit wiring disconnected.] Short circuit, Check if the heat Overload operation? exchanger is dirty, stopped up, etc. Is the refrigerant level proper? Adjust the level to the proper level. Is the wiring to the compressor Connect it securely.
• Page 35
  [Wiring error including power cable, defective indoor/ Error of signal transmission outdoor unit PCB] Does error persist after power Trouble by transient cause, not unit trouble. reset? Correct improper wire connection on indoor/ Is there any wrong connection on outdoor unit. indoor/outdoor unit wiring? Is DC 0~Approx.
• Page 35
  [Wiring error including power cable, defective indoor/ Error of signal transmission outdoor unit PCB] Does error persist after power Trouble by transient cause, not unit trouble. reset? Correct improper wire connection on indoor/ Is there any wrong connection on outdoor unit. indoor/outdoor unit wiring? Is DC 0~Approx.
• Page 36
  (5) Inspection procedures of indoor electrical equipment Is fuse (3.15A) blown? Replace fuse. Is voltage applied between terminals 1~2 on terminal Replace PCB. block? (AC 220/230/240V) Is DC 0~12V detected between terminals 2~3 on terminal Replace PCB. block? Indoor electrical equipment are normal.
• Page 36
  (5) Inspection procedures of indoor electrical equipment Is fuse (3.15A) blown? Replace fuse. Is voltage applied between terminals 1~2 on terminal Replace PCB. block? (AC 220/230/240V) Is DC 0~12V detected between terminals 2~3 on terminal Replace PCB. block? Indoor electrical equipment are normal.

• Page 37: Servicing

  6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities..noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging.

• Page 37: Servicing

  6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities..noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging.

• Page 38: Refrigerant Piping Installation/Servicing Manual For Air Conditioners Using R410A

  REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL FOR AIR CONDITIONERS USING R410A (These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association) 7.1 Outline 7.1.1 Refrigerant R410A (1) Adoption of R410A in air conditioners In 1974, it was pointed out that the ozone layer in the upper stratosphere (about 20 ~ 40 km above ground) might have been damaged by the ozone depleting substances such as CFC (chlorofluorocarbon) and HCFC (hydrochlorofluorocarbon).

• Page 38: Refrigerant Piping Installation/Servicing Manual For Air Conditioners Using R410A

  REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL FOR AIR CONDITIONERS USING R410A (These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association) 7.1 Outline 7.1.1 Refrigerant R410A (1) Adoption of R410A in air conditioners In 1974, it was pointed out that the ozone layer in the upper stratosphere (about 20 ~ 40 km above ground) might have been damaged by the ozone depleting substances such as CFC (chlorofluorocarbon) and HCFC (hydrochlorofluorocarbon).

• Page 39
  (3) Lubricating oils for R410A As the lubricating oils for R22, mineral oils, alkylbenze synthetic oils, etc. have so far been used. As R410A features less solubility with these conventional lubricating oils such as mineral oils, the lubricating oils tend to stay within the refrigeration cycle. As the lubricating oils highly soluble with R410A, ester, ethereal and other synthetic oils are available.
• Page 39
  (3) Lubricating oils for R410A As the lubricating oils for R22, mineral oils, alkylbenze synthetic oils, etc. have so far been used. As R410A features less solubility with these conventional lubricating oils such as mineral oils, the lubricating oils tend to stay within the refrigeration cycle. As the lubricating oils highly soluble with R410A, ester, ethereal and other synthetic oils are available.
• Page 40
  (2) Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used.
• Page 40
  (2) Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used.
• Page 41
  d) Flare processing øD Make certain that a clamp bar and copper pipe have been cleaned. By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conventional flare tool. Flare processing dimensions differ according to the type of flare tool. Be careful. When using a conventional flare tool, be sure to secure “dimension A”…
• Page 41
  d) Flare processing øD Make certain that a clamp bar and copper pipe have been cleaned. By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conventional flare tool. Flare processing dimensions differ according to the type of flare tool. Be careful. When using a conventional flare tool, be sure to secure “dimension A”…

• Page 42: Storage Of Piping Materials

  Table 8. Flare and flare nut dimensions for R22 [unit: mm] Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.2 16.0 12.9 15.88 19.4 19.0 16.0 (2) Flare connecting procedures and precautions a) Make sure that the flare and union portions do not have any scar or dust, etc.

• Page 42: Storage Of Piping Materials

  Table 8. Flare and flare nut dimensions for R22 [unit: mm] Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.2 16.0 12.9 15.88 19.4 19.0 16.0 (2) Flare connecting procedures and precautions a) Make sure that the flare and union portions do not have any scar or dust, etc.

• Page 43
  (2) Identification a) Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 (see on page 37), and, as shown in Tables 5 and 6 (see on page 39), 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 43
  (2) Identification a) Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 (see on page 37), and, as shown in Tables 5 and 6 (see on page 39), it also differs from R22 in flare processing and flare nut dimensions. So, it is necessary to choose a piping set suitable for R410A.
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  (3) Flux a) Reasons for the use of flux • By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler. • In the brazing process, it prevents the metal surface from being oxidized. •…
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  (3) Flux a) Reasons for the use of flux • By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler. • In the brazing process, it prevents the metal surface from being oxidized. •…
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  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.
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  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.
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  (1) Tools exclusive for R410A a) Gauge manifold • As R410A is characterized by high pressure, conventional tools cannot be used. Table 11. Differences between conventional high/low pressure gauges and those for R410A Conventional gauges Gauges exclusive for R410A High pressure -0.1~3.5MPa -0.1~5.3MPa gauge (red)
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  (1) Tools exclusive for R410A a) Gauge manifold • As R410A is characterized by high pressure, conventional tools cannot be used. Table 11. Differences between conventional high/low pressure gauges and those for R410A Conventional gauges Gauges exclusive for R410A High pressure -0.1~3.5MPa -0.1~5.3MPa gauge (red)
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  e) Flare tool (clutch type) • A flare tool for R410A is provided with a large clamp bar receiving hole so that the projection of the copper pipe from the clamp bar can be set at 0~0.5 mm in flare processing, and also features higher spring strength for increased expansion pipe torque.
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  e) Flare tool (clutch type) • A flare tool for R410A is provided with a large clamp bar receiving hole so that the projection of the copper pipe from the clamp bar can be set at 0~0.5 mm in flare processing, and also features higher spring strength for increased expansion pipe torque.
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  7.3.2 New installation work (when using new refrigerant piping) (1) Air purge by vacuum pump and gas leakage inspection (see Fig. 6) a) Connect the charge hose to the outdoor unit. 1 b) Connect the charge hose to the vacuum pump adapter. 2 At this time, keep the control valves in the fully closed position.
• Page 48
  7.3.2 New installation work (when using new refrigerant piping) (1) Air purge by vacuum pump and gas leakage inspection (see Fig. 6) a) Connect the charge hose to the outdoor unit. 1 b) Connect the charge hose to the vacuum pump adapter. 2 At this time, keep the control valves in the fully closed position.
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  f) After charging liquid refrigerant into the air conditioner by closing the charging valve, stop operation by fully closing the gauge manifold’s valve Lo. 2 5 g) Quickly remove the charge hose from the service port. 6 When stopped halfway, refrigerant being cycled will be released. h) After securing the caps on the service port and control valve, check the caps’…
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  f) After charging liquid refrigerant into the air conditioner by closing the charging valve, stop operation by fully closing the gauge manifold’s valve Lo. 2 5 g) Quickly remove the charge hose from the service port. 6 When stopped halfway, refrigerant being cycled will be released. h) After securing the caps on the service port and control valve, check the caps’…

• Page 50: Refrigerant Recovery

  7.3.6 Refrigerant recharging at servicing When it becomes necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. (For details, see the instruction manual prepared by the equipment manufacturer) 1) Connect the charge hose to the outdoor unit’s service port. 2) Connect the charge hose to the vacuum pump adapter.

• Page 50: Refrigerant Recovery

  7.3.6 Refrigerant recharging at servicing When it becomes necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. (For details, see the instruction manual prepared by the equipment manufacturer) 1) Connect the charge hose to the outdoor unit’s service port. 2) Connect the charge hose to the vacuum pump adapter.

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  (4) Recovering procedures a) According to the instructions for handling the refrigerant recovering equipment (described in the attached instruction manual), operate the equipment to recover refrigerant. b) During the operation, take care of the following cautions. 1 Ascertain that the refrigerant recovering equipment is running as required and always monitor the state of operation so that adequate steps can be taken in an emergency.
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  (4) Recovering procedures a) According to the instructions for handling the refrigerant recovering equipment (described in the attached instruction manual), operate the equipment to recover refrigerant. b) During the operation, take care of the following cautions. 1 Ascertain that the refrigerant recovering equipment is running as required and always monitor the state of operation so that adequate steps can be taken in an emergency.
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  b) Charge hose (pressure resistant hose for fluorocarbon) and packing • It is 1/4B in thickness and available in various lengths, etc. • Use a hose whose pressure resisting performance is higher than 5.2 MPa (52 kg/cm • Generally, a setting fixture is provided only on one end. Hose (4) Gauge manifold Setting…
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  b) Charge hose (pressure resistant hose for fluorocarbon) and packing • It is 1/4B in thickness and available in various lengths, etc. • Use a hose whose pressure resisting performance is higher than 5.2 MPa (52 kg/cm • Generally, a setting fixture is provided only on one end. Hose (4) Gauge manifold Setting…
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  WALL MOUNTED TYPE ROOM AIR-CONDITIONER Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 No.073(1A) RO…
• Page 53
  WALL MOUNTED TYPE ROOM AIR-CONDITIONER Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 No.073(1A) RO…