TOSHIBA RAS-2M18G3AVG-E RAS Multi-split Inverter Outdoor Installation Guide

AIR CONDITIONER (MULTI-SPLIT TYPE)
Installation Manual
R32
INVERTER
Outdoor Unit
Model name:
RAS-2M18G3AVG-E
RAS-3M18G3AVG-E

* NOTE: Descriptions about operations for the 3 indoor units in RAS- 2M18G3AVG-E.
Please read this Installation Manual carefully before installing the Air Conditioner.

• This Manual describes the installation method of the outdoor unit.
• For installation of the indoor unit, refer to the Installation Manual attached to the indoor unit.

IMPORTANT NOTICE
For details on how to install the indoor units, refer to the installation manual accompanying the indoor units.

Precautions for safety

The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual.
Be sure to read this installation manual carefully before installing.
The supplied CD-ROM contains the installation manual translated into many languages.
Recommend to the owner to perform maintenance periodically when using over long periods of time.
This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
Warning indications on the air conditioner unit

**| WARNING**

(Risk of fire)

| This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit.
In case that refrigerant type is R32, this unit uses a flammable refrigerant.
If refrigerant leaks and comes in contact with fire or heating part,
it will create harmful gas and there is risk of fire.
---|---|---

| **** Read the OWNER’S MANUAL carefully before operation.

| Service personnel are required to carefully read the OWNER’S MANUAL and INSTALLATION MANUAL before operation.

| Further information is available in the OWNER’S MANUAL, INSTALLATION MANUAL, and the like.
Warning indication| Description
---|---

CAUTION
BURST HAZARD
Open the service valves before the operation, otherwise there might be the burst.

| CAUTION BURST HAZARD

Open the service valves before the operation, otherwise there might be the burst.

Be sure to follow the precautions provided here to avoid safety risks. The symbols and their meanings are shown below.

**   DANGER*| It indicates that incorrect use of this unit can result in a high possibility of severe injury(1) or death.
**   WARNING| It indicates that incorrect use of this unit may cause severe injury or death.
  ****CAUTION*| It indicates that incorrect use of this unit may cause personal injury(2), or property damage(*3).

1. A severe injury refers to blindness, injury, burns (hot or cold), electrical shock, bone fracture, or poisoning that leaves after effects and requires hospitalization or extended out-patient treatment.
2.  Personal injury means a slight accident, burn, or electrical shock which does not require admission or repeated hospital treatment.
3.  Property damage means greater damage which affects assets or resources.

For general public use
Power supply cord of parts of appliance for outdoor use shall be at least polychloroprene sheathed
exible cord (design H07RN-F) or cord designation 60245 IEC66 (1.5 mm² or more).
(Shall be installed in accordance with national wiring regulations.)
This appliance is not intended for use by person (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
CAUTION
To disconnect the appliance from the main power supply This appliance must be connected to the main power supply by means of a circuit breaker or a switch with a contact separation of at least 3 mm in all poles.
CAUTION
NEW REFRIGERANT AIR CONDITIONER INSTALLATION THIS AIR CONDITIONER USES THE NEW HFC REFRIGERANT (R32), WHICH DOES NOT DESTROY THE OZONE LAYER.
R32 REFRIGERANT IS APT TO BE AFFECTED BY IMPURITIES SUCH AS WATER, OXIDIZING MEMBRANES, AND OILS BECAUSE THE PRESSURE OF R32 REFRIGERANT IS APPROX. 1.6 TIMES OF REFRIGERANT R22.
CAUTION
AS WELL AS THE ADOPTION OF THIS NEW REFRIGERANT, REFRIGERATING MACHINE OIL HAS ALSO BEEN CHANGED. THEREFORE, DURING INSTALLATION WORK, BE SURE THAT WATER, DUST, FORMER REFRIGERANT, OR REFRIGERATING MACHINE OIL DOES NOT ENTER THE REFRIGERATION CYCLE OF A NEWREFRIGERANT AIR CONDITIONER. TO AVOID MIXING REFRIGERANT AND REFRIGERATING MACHINE OIL, THE SIZES OF CHARGING PORT CONNECTING SECTIONS ON THE MAIN UNIT ARE DIFFERENT FROM THOSE FOR THE CONVENTIONAL REFRIGERANT, AND DIFFERENT SIZE TOOLS ARE ALSO REQUIRED. FOR CONNECTING PIPES, USE NEW AND CLEAN PIPING MATERIALS WITH HIGH PRESSURE WITHSTAND CAPABILITIES, DESIGNED FOR R32 ONLY, AND ENSURE THAT WATER OR DUST DOES NOT ENTER. MOREOVER, DO NOT USE ANY EXISTING PIPING AS ITS PRESSURE WITHSTAND MAY BE INSUFFICIENT AND MAY CONTAIN IMPURITIES.
DANGER

• THE MANUFACTURER SHALL NOT ASSUME ANY LIABILITY FOR THE DAMAGE CAUSED BY NOT OBSERVING THE DESCRIPTION OF THIS MANUAL.

• FOR USE BY QUALIFIED PERSONS ONLY.

• MEANS FOR DISCONNECTION FROM THE SUPPLY HAVING A CONTACT SEPARATION OF AT LEAST 3 MM IN ALL POLES MUST BE INCORPORATED IN THE FIXED WIRING.

• TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

• CONNECT THE CONNECTING CABLES CORRECTLY. IF THE CONNECTING CABLES ARE CONNECTED WRONGLY, ELECTRIC PARTS MAY BE DAMAGED.

• CHECK THE EARTH WIRE THAT IT IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION.

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

• TO PREVENT OVERHEATING THE INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATERS, FURNACE, STOVES, ETC.

• WHEN MOVING THE AIR CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT (R32) WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CYCLE BECOMES ABNORMALLY HIGH AND IT RESULTANTLY CAUSES BURST OF THE PIPE AND INJURIES ON PERSONS.

• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM.
  IF THE REFRIGERANT GAS IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSES GENERATION OF POISONOUS GAS.

• WHEN INSTALLING OR RE-INSTALLING THE AIR CONDITIONER, DO NOT INJECT AIR OR OTHER SUBSTANCES BESIDES THE DESIGNATED REFRIGERANT “R32” INTO THE REFRIGERATING CYCLE.
  IF AIR OR OTHER SUBSTANCES ARE MIXED, AN ABNORMAL PRESSURE CAN OCCUR IN THE REFRIGERATING CYCLE, AND THIS CAN CAUSE AN INJURY DUE TO A PIPE RUPTURE.

WARNING
About the refrigerant

• This product contains uorinated greenhouse gases.

• Do not vent gases to the atmosphere.

• The appliance shall be stored in a room without continuously operating ignition sources (for example: open ames, an operating gas appliance or an operating electric heater).

• Do not pierce or burn refrigerant cycle parts.

• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.

• Be aware that refrigerants may not contain an odour.

• The refrigerant inside the unit is ammable. If the refrigerant leaks in the room and comes in contact with re from a burner, a heater, or a cooker, it may result in re or the formation of a harmful gas.

• Turn off any combustible heating devices, ventilate the room, and contact the dealer from which you purchased the unit.

• Do not use the unit until a service person con rms that the portion from which the refrigerant leaked is repaired.

• When installing, relocating, or servicing the air conditioner, use only the speci ed refrigerant (R32) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines.

• Pipe-work shall be protected from physical damage.

• Compliance with national gas regulations shall be observed.

• Do not use any refrigerant different from the one specied for complement or replacement.
  Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion of the product or an injury to your body.

• Installation work must be requested from the supplying retail dealership or professional vendors. Self-installation may cause water leakage, electrical shock, or re as a result of improper installation.

• Specied tools and pipe parts for model R32 are required, and installation work must be done in accordance with the manual. HFC type refrigerant R32 has 1.6 Times more pressure than that of conventional refrigerant (R22). Use the speci ed pipe parts, and ensure correct installation, otherwise damage and/or injury may be caused. At the same time, water leakage, electrical shock, and re may occur.

•  Be sure to install the unit in a place which can sufciently bear its weight. If the load bearing of the unit is not enough, or installation of the unit is improper, the unit may fall and result in injury.

• Electrical work must be performed by a qualied electrical engineer in accordance with  the code governing such installation work, internal wiring regulations, and the manual.
  A dedicated circuit and the rated voltage must be used. Insuf cient power supply or improper installation may cause electrical shock or re.

• Use a cabtyre cable to connect wires in the indoor/outdoor units. Midway connection, stranded wire, and single-wire connections are not allowed. Improper connection or xing may cause a re.

•  Wiring between the indoor unit and outdoor units must be well shaped so that the cover can be rmly placed. Improper cover installation may cause increased heat, re, or electrical shock at the terminal area.

• Be sure to use only approved accessories or the specied parts. Failure to do so may cause the unit to fall, water leakage, re or electrical shock.

•  After the installation work, ensure that there is no leakage of refrigerant gas. If the refrigerant gas leaks out of the pipe into the room and is heated by re or something else from a fan heater, stove or gas range, it causes generation of poisonous gas.

•  Make sure the equipment is properly earthed. Do not connect the earth wire to a gas pipe, water pipe, lightning conductor, or telephone earth wire. Improper earth work may be the cause of electrical shock.

• Do not install the unit where ammable gas may leak. If there is any gas leakage or accumulation around the unit, it can cause a re.

• Do not select a location for installation where there may be excessive water or humidity, such as a bathroom. Deterioration of insulation may cause electrical shock or re.

• Installation work must be performed following the instructions in this installation manual.
  Improper installation may cause water leakage, electrical shock or re. Check the following items before operating the unit.
  – Be sure that the pipe connection is well placed and there are no leaks.
  – Check that the service valve is open. If the service valve is closed, it may cause overpressure and result in compressor damage. At the same time, if there is a leak in the connection part, it may cause air suction and overpressure, resulting in burst or injury.

• The installation of pipe work shall be kept to a minimum.

• The following must be certainly done during pump down.

• Do not incorporate air into the refrigeration cycle.

• Close the 2 service valves. Stop the compressor and remove the refrigerant pipe.
  If the refrigerant pipe is removed when the compressor is operating and service valves are opened, the refrigerant cycle will inhale unwanted matter such as air and the pressure in the cycle becomes abnormally elevated. It may cause a burst or injury.

•  Do not modify the power cable, connect the cable midway, or use a multiple outlet  extension cable. Doing so may cause contact failure, insulation failure, or excess current, resulting in re or electrical shock.

•  If you detect any damage, do not install the unit. Contact your supplying dealer immediately.

• Never modify this unit by removing any of the safety guards or bypassing any of the safety interlock switches.

• Do not wash air conditioners with pressure washers. Electric leaks may cause electric shocks or res.

•  Be sure to comply with local regulations/codes when running the wire from the outdoor unit to the indoor unit. (Size of wire and wiring method etc.)

•  When installing the air conditioner in a small room, provide appropriate measures to ensure that the concentration of refrigerant leakage occur in the room does not exceed the critical level. It is not dangerous refrigerant; it has not toxicity. However, a concentration above 0.3 kg/m³ as criterion still causes suffocation. The volume of refrigerant charged to the multi system air conditioner is more than the volume charged to a conventional individual system.

• Before operating the air conditioner after having completed the work, check that the electrical parts control box cover of the indoor unit and valve cover of the outdoor unit are closed, and set the circuit breaker to the ON position. You may receive an electric shock etc. if the power is turned on without rst conducting these checks.

• Make sure drain hose insulation if cooling operation is used at sub-zero ambient temperature.

•  After installation work, make sure below before operation.
  – Connection pipes are connected properly and no leakage.
  – Packed valves are fully open.
  Running compressor without open packed valves may cause abnormal high pressure and parts failure.
  Leakage at connection piping may suck air and make further high pressure cause burst and injure.

•  During pump down work make sure below process.
  – Don’t mix air into the refrigerant cycle.
  – Stop the compressor before removing piping after packed valves are fully closed. Removing piping under the compressor running and packed valves open, air might be sucked and refrigeration cycle pressure becomes abnormally high, and it causes burst or injury on persons.

CAUTION

• Please read this installation manual carefully before installing the unit. It contains further important instructions for proper installation.
• Exposure of unit to water or other moisture before installation could result in electric shock. Do not store it in a wet basement or expose to rain or water.
•  After unpacking the unit, examine it carefully for possible damage.
• Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify the noise level of the unit or where noise and discharged air might disturb neighbours.
• This appliance must be connected to the main power supply by means of a circuit breaker depending on the place where the unit is installed. Failure to do so may cause electrical shock.
• Follow the instructions in this installation manual to arrange the drain pipe for proper drainage from the unit. Ensure that drained water is discharged. Improper drainage can result in water leakage, causing water damage to furniture.
• Tighten the are nut with a torque wrench using the prescribed method. Do not apply excess torque. Otherwise, the nut may crack after a long period of usage and it may cause the leakage of refrigerant.
• Wear gloves (heavy gloves such as cotton gloves) for installation work. Failure to do so may cause personal injury when handling parts with sharp edges.
• Do not touch the air intake section or the aluminium ns of the outdoor unit. It may cause injury.
• Do not install the outdoor unit in a place which can be a nest for small animals. Small animals could enter and contact internal electrical parts, causing a failure or re.
• Request the user to keep the place around the unit tidy and clean.
• Make sure to conduct a test run after the installation work, and explain how to use and maintain the unit to the customer in accordance with the manual. Ask the customer to keep the operation manual along with the installation manual.
• Do not climb onto or place objects on top of the outdoor unit. You may fall or the objects may fall off of the outdoor unit and result in injury.

Requirement of report to the local power supplier
Please make absolutely sure that the installation of this appliance is reported to the local power supplier before installation. If you experience any problems or if the installation is not accepted by the supplier, the service agency will take adequate countermeasures.
Important information regarding the refrigerant used This product contains uorinated greenhouse gases.
Do not vent gases into the atmosphere.
Refrigerant type: R32
GWP (1) value: 675 * (ex. R32 ref. AR4)  (1)
GWP = global warming potential
The refrigerant quantity is indicated on the unit name plate.

• This value is based on F gas regulation 517/2014

Installation / service tools

Changes in the product and components
In air conditioners using R32, in order to prevent any other refrigerant from being accidentally charged, the service port diameter size of the outdoor unit service valve has been changed. (1/2 UNF 20 threads per inch)

• In order to increase the pressure resisting strength of the refrigerant piping, fl are processing diameter and opposing fl are nuts sizes have been changed.
  (for copper pipes with nominal dimensions 1/2 and 5/8)

Specifications

Operating conditions*1

| Cooling operation| –10 to 46 °C
Dry operation| –10 to 46 °C
Heating operation| –20 to 24 °C

Connecting pipe length

| Minimum for 1 unit| (m)| 2| 2
Maximum for 1 unit| (m)| 20| 25
Maximum for total unit| (m)| 30| 50
Height difference| (m)| 10| 10
No additional refrigerant charge| (m)| 30| 50

The specifi cations for performance of this air conditioner differs depending on the combination of the indoor units which are operated.
*1 If the air conditioner is used in conditions other than the above, the safety protection functions may be activated.

• Example of indoor unit class: RAS-B10UFV-E1 is abbreviated as “10”.

36 (RAS-3M18G3AVG-E)

All combinations that do not exceed the “Total” number can be installed.
2 or more indoor units must be connected to an outdoor unit.
When 2 indoor units are connected to an outdoor unit, note that some combinations of indoor units are not compatible.
For the further details, refer to the catalogue.
2 Need the reducer (07, 10, 13 class 12.7 to 9.52 mm).
3 Need the expander (16 class 9.52 to 12.7 mm).

Installation parts, accessories

*Installation parts Locally procured**

1 ea.

07, 10, 13| 6.35 mm| 9.52 mm
16| 6.35 mm| 12.7 mm
Putty, PVC tapes| —| 1 ea.

*4 Refrigerant piping covered with insulating material (Polyethylene foam, 6 mm thick) When duct-type or cassette-type unit is to be installed, it shall be covered with thicker insulating material (Polyethylene foam, 10 mm thick)

Installation manual| 1| | Rubber cap (Water-proof)| 2| | CD-ROM
(Installation manual)| 1| | F-GAS label| 1| | Drain nipple| 1|
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
Product specification| 1| |

 Installation of outdoor unit

Installation Location

• A place which can bear the weight of the outdoor unit and does not cause an increase in noise level and vibration.
• A place where the operation noise and air discharge do not disturb neighbours.
• A place which is not exposed to strong wind.
• A place free of combustible gas.
• A place which does not block a passageway.
• A place where the drain water does not cause any problems.
• A place where there are no obstructions near its air intake or air discharge.

Installation in the following places may result in trouble:

• A place with a lot of machine oil.
• A place with saline-rich atmosphere such as a coastal area.
• A place with high level of sulfi de gas.
• A place where high-frequency waves are likely to be generated, such as from audio equipment, welders, or medical equipment.
  Do not install the unit in such places.

CAUTION
When the outdoor unit is installed in a place where the drain water might cause any problems, Seal the water leakage point tightly using a silicone adhesive or caulking compound.
Precautions for Installation

• When the outdoor unit is to be installed in an elevated position, be sure to secure its feet.
• If the outdoor unit is to be mounted on a wall, make sure the base plate supporting it is sturdy enough.
• The base plate should be designed and manufactured to maintain its strength over a long period of time, and suffi cient consideration should be given to ensure that the outdoor unit will not fall.
• When the outdoor unit is installed in a place that is always exposed to strong wind such as a coastal area or on a high story of a building, secure the normal fan operation using a duct or a wind shield.
• Especially in windy areas, install the unit in such a way as to prevent the admission of wind.
• When the outdoor unit is to be mounted high on a wall, take particular care to ensure that parts do not fall, and that the installer is protected.
• When doing installation work at ground level, it is usual to make wiring and pipe connections to the indoor units fi rst, and then to make connections to the outdoor units.
• However, if outdoor work is diffi cult, you can change the procedure.
• For example, by making adjustments to the wiring and piping lengths on the inside (rather than the outside).
• When using an air conditioner under low outside temperature conditions (Outside temp: -5°C or lower) In COOL mode, prepare a duct or wind shield so that it is not affected by the wind.

Necessary Space for Installation

If you need to install the outdoor unit in a location where there are some obstructions or a wall, secure suffi cient space as shown in the fi gure below.
The cooling/heating effect may be reduced by 10%.

Draining Off the Water from the Outdoor Unit
Install 2 waterproof rubber caps and the drain nipple to drain off the water from the outdoor unit.

• Seal the knock-out holes and screw/thread areas tightly using a silicon adhesive or a caulking compound.
• Use a drain pan to apply a centralized drain.

Installation in Regions with Snowfall and Cold Temperatures
Do not use waterproof rubber caps or a drain nipple.

• If you need to install the outdoor unit in a location where there is a possibility of the drain freezing, pay close attention so that the drain does not become frozen.
• To protect the outdoor unit from snow, install the outdoor unit on a holding frame, and attach a snow protection hood and plate.
• Keep the outdoor unit at least 500 mm above the snow accumulation line.

Fixing the Outdoor Unit
Fix the outdoor unit using attachment bolts.

• Use 8 mm or 10 mm anchor bolts and nuts.
• Do not allow the attachment bolts to protrude by more than 15 mm.
• Install the outdoor unit at ground level.
• Attach the vibration-proof rubber pads under the fi xing legs.

Support the bottom surface of the mounting leg that is in contact with and underneath the bottom plate of the outdoor unit.

Refrigerant piping

CAUTION
Install in rooms that are 5 m 3 or larger. If a leak of refrigerant gas occurs inside the room, an oxygen de ciency may occur.
Detaching the Valve cover Remove the 5 screws.

• Pull the valve cover in the direction of the arrow, and remove it.

Refrigerant Piping Connection
Flaring

1. Cut the pipe with a pipe cutter.

2. Remove the burr inside of the pipe.
   When removing the burr, be careful so that chips do not fall into the pipe.

3. Remove the are nuts attached to the outdoor/indoor unit, then insert them into each of the pipes.

4.  Flare the pipes. See the following table for the projection margin (A) and aring size (B)

2 tool

| Imperial (wing nut type) R32 tool| | Width across flat| Tighten torque
mm| mm| mm| mm| mm| mm| N•m| kgf•m
6.35| 0.8| 0 to 0.5| 1.5 to 2.0| 9.1| 17| 14 to 18| 1.4 to 1.8
9.52| 0.8| 0 to 0.5| 1.5 to 2.0| 13.2| 22| 33 to 42| 3.3 to 4.2
12.7| 0.8| 0 to 0.5| 2.0 to 2.5| 16.6| 26| 50 to 62| 5.0 to 6.2

CAUTION

• Do not scratch the inner surface of the ared part when removing burrs.
• Flare processing under the condition of scratches on the inner surface of are processing part will cause refrigerant gas leak.

Pipe connection

1. Make wire and pipe connections for each indoor unit separately.
2.  Align the centres of the connecting pipes and tighten the are nut as much as possible with your ngers, then tighten the nut using a torque wrench.

Be sure to tighten the nut at the specied torque value.

• If you use one outdoor unit for several indoor units of a different class, connect the largest one rst A, then connect the rest in the order B to C.
• Do not remove the are nuts for any ports you are not going to use for connection.
• Do not leave the are nut unattached for a long period of time.
• Use a different-diameter joint if the diameters of the connection port and connection piping are different.
•  Mount the different-diameter joint on the connection port of the outdoor unit.

CAUTION

• KEEP IMPORTANT 7 POINTS FOR
  PIPING WORK.
  (1) Take away dust and moisture (inside of the connecting pipes).
  (2) Tighten the connections (between pipes and unit).
  (3) Evacuate the air in the connecting pipes using a VACUUM PUMP.
  (4) Check gas leak (connected points).
  (5) Be sure to fully open the packed valves before operation.
  (6) Reusable mechanical connectors and ared joints are not allowed indoors. When mechanical connectors are reused indoors, sealing parts shall be renewed.
  When ared joints are reused indoors, the are part shall be refabricated.
  (7) Don’t operate air conditioner in case no refrigerant in the system.

Air Purge
From the sake of environmental protection, use a vacuum pump to extract the air during installation.

• Prepare a 4 mm hexagon wrench.

  1. Connect a charge hose.
     • Make sure that the Handle Hi of the gauge manifold valve is closed fully.
     • Connect the port of the gauge manifold valve and the service port (Valve core (Setting Pin)) using the charge hose.
     NOTE
     If a control valve or charge valve is attached to the charge hose, leak of R32 refrigerant can be avoided.

  2. Open the Handle Low of the gauge manifold valve fully, then operate the vacuum pump.
     • Loosen the
     are nut of the at the gas end a little to make sure that air is taken in, then tighten the nut.
     • If yound air is not taken in, make sure that the charge hose is connected to the port(s) securely.
     • Perform extraction for about 15 or more minutes and make sure that the compound pressure gauge reading is –101 kPa (–76 cmHg).
     • If the compound pressure gauge reading is not –101 kPa (–76 cmHg), there is a possibility air is being taken in from the port(s).
     • Make sure that the charge hose is connected to the port(s) securely.

  3. Close the Handle Low of the gauge manifold valve fully, then stop operating the vacuum pump.
     • Leave the gauge and pump as they are for 1 or 2 minutes, then make sure that the compound pressure gauge reading stays at –101 kPa (–76 cmHg).
     • You need not add refrigerant.

  4. Disconnect the charge hose from the service port, then open the valve stem fully using a 4 mm hexagon wrench.

  5. Tighten the service valve stem cap and service port cap securely.
     CAUTION
     Use a torque wrench and tighten the nut at the specifi ed torque value.

  6. Tighten all the caps on the valves securely, then perform a gas leak inspection.

Insulation of the Refrigerant Pipes

• Insulate the refrigerant pipes for liquid and gas separately.

Gas Leak Inspection

• Perform a gas leak inspection for the fl are nut connections, valve stem connection, and service port cap without fail.
• Use a leak detector exclusively manufactured for R32.

Performing Additional Installation of an Indoor Unit

1. Collect refrigerant from the outdoor unit.
2.  Turn off the circuit breaker.
3.  Perform additional installation referring to the procedure from “Refrigerant Piping Connection” on the previous page.

Electrical work

WARNING

• Be sure to comply with local regulations/  codes when running the wire from the outdoor unit to the indoor unit.
  (Size of wire and wiring method etc.)

• A lack of electrical capacitance or incorrect wiring may cause an electric shock or a fi re.

• To make sure that the wiring connection are secure, use designated cables.

• Fix the cables securely so that no external force applied to the cables may effect the terminals.

• If wiring connections are incomplete or cables are not fi xed securely, it may cause a fi re.

• Be sure to ground the outdoor unit.

• Incomplete grounding may lead to an electric shock.
  CAUTION

• Incorrect/incomplete wiring will cause electrical fi res or smoke.

• Prepare the power source for exclusive use with the air conditioner.

• This product can be connected to the main power.
  Fixed wire connections:
  A switch that disconnects all poles and has a contact separation of at least 3 mm must be incorporated into the fi xed wiring.

Wire Connection

• The dash lines show on-site wiring.
  

• Connect the indoor/outdoor connecting cables to the identical terminal numbers on the terminal block of each unit.

• Incorrect connection may cause a failure.

1. Remove the valve cover screws.

2. Pull the valve cover in the direction of arrow, and remove it.

3. Remove the cord clamp and the terminal cover.

4. Connect the wires for the power source and each indoor unit.
   Connect the connecting cable to the terminal as identifi ed by the matching numbers on the terminal block of the indoor and the outdoor unit.

5.  Fix the wiring connections for the power source and each indoor unit securely using a cord clamp.

6.  Attach the terminal cover and the valve cover.

Stripping Length of connecting cable for outdoor unit

Grounding

This air conditioner must be grounded without fail.

• Grounding is necessary not only to safeguard against the possibility of receiving an electric shock but also to absorb both static, which is generated by high frequencies and held in the surface of the outdoor unit, and noise since the air conditioner incorporates a frequency conversion device (called an inverter) in the outdoor unit.
• If the air conditioner is not grounded, users may receive an electric shock if they touch the surface of the outdoor unit and that unit is charged with static.

Test run

Wiring/Piping Check
CAUTION
Electric current is applied on the control board. Beware of electric shock.

1. Remove the valve cover screws.
2. Pull the valve cover in the direction of arrow, and remove it.
3. Turn on the circuit breaker to supply electricity.
   In the initial LED display status, D805 is lighted as below.
   : ON,
   : OFF, : Rapid Flashing (5 times/sec.),
   ¯ : Slow Flashing (1 time/sec.)D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   | | | | |

Start running all the indoor units connected to the outdoor unit in the cooling mode.
(The indoor unit in the room that doesn’t operate the cooling mode cannot be checked.)

4. After 5 minutes, hold down SW01 for at least 5 seconds, and check that D800 is lighted and D804 light is ashing (1 time/sec.).
   D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   | | | | ◇|
5.  Press the SW01 4 times until the LED is displayed as below.
   D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   | | | | |
6.  Press SW02 for 1 times. Then D805 light is ashing (5 times/sec.).
   D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   | | | | |
7. Hold down SW02 for at least 5 seconds. Then the wiring/piping check starts automatically. (The LED display is lighted for a moment.)
   D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   | | | | ◇|

• If no problems are detected, the checking operation returns to the normal operation automatically. The LED is displayed as below.

8. The below is displayed when the error is detected.
   (* Repetition of 3 sec ON / 0.5 sec OFF)D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   | | | | |

Press the SW01 3 times until the LED is displayed as below, to check the room judged as error.

Incorrect wiring/piping can be checked by pressing SW02. The LED is displayed as below. Turn off the circuit breaker, then check wiring/piping again.

Check result

D800| D801| D802| D803| D804| D805| Description
| | | | | ◇| Normal operation (no error)
| | | | | ◇| Trouble in unit A
| | | | | ◇| Trouble in unit B
| | | | | ◇| Trouble in unit C
| | | | | ◇| Trouble in unit A and B
| | | | | ◇| Trouble in unit A and C
| | ****| | | ◇| Trouble in unit B and C
| | | | | ◇| Trouble in unit A, B and C

• The D800 LED represents unit A.
• The D801 LED represents unit B.
• The D802 LED represents unit C.

9. When you want to start over the operation of the SW01 and SW02, press the SW01 and the SW02 at the same time for 5 sec. (The procedure will set back to step 3.) However, do not execute the operation during the check. If by any chance the check is stopped by the operation, start over the check after turning off the power once.
10.  Notes
    • It sometimes takes about 30 minutes maximum for the check.
    • During the check, the compressor and the fan of the outdoor/indoor unit repeat ON/OFF.
    • You cannot check wiring/piping when the external temperature is 5°C or less. Also, there is a possibility to misjudge if the indoor temperature becomes too low by cooling operation. In that case, execute the cooling operation for per room and check if the connection is normal.

Gas Leak Inspection
Refer to the “
Gas Leak Inspection” on page 12.
Test run

1. If you perform the test run in summer, start running in the cooling mode rst to decrease the temperature of the room, then run in the heating mode.
   (Heating mode: Set the temperature to 30°C.)
   • If you perform the test run in winter, start running in the heating mode rst to increase the temperature of the room, then run in the cooling mode.
   (Cooling mode: Set the temperature to 17°C.)

2.  For the test run, be sure to satisfy the following conditions below:
   – Perform the test run for each indoor unit respectively.
   – Perform the test run for about 10 minutes in both the cooling mode and the heating mode.
   • You can perform the test run in the cooling/heating mode by utilizing the thermo sensor of the indoor unit. Cooling mode: Warm the thermo sensor using an appliance such as a hair dryer.
   Heating mode: Put a cold towel on the thermo sensor.

Instructions for the Customers

• Explain to the customers the proper operation procedure and let them operate the air conditioner along with the supplied instruction manual.

• When multiple indoor units are connected to the outdoor unit, the cooling mode and the heating mode are not available at the same time.
  When multiple indoor units are running at the same time, the operation mode of the unit which starts running rst is applied to the other units.

• When you start running the indoor unit or change the operation mode, the unit starts running after 3 minutes. This is due to the protection function of the unit, not a malfunction.

• When the external temperature becomes low, the pre-heating of the compressor starts to protect it. Keep the circuit breaker on for use. The electricity consumption during pre-heating is about 30 W. If the circuit breaker is turned off, the indoor unit may not start running for about 10 minutes or more.

• Electronic expansion valves are used for the outdoor unit.
  When you turn on the power, the outdoor unit starts clattering every 1 or 2 months. This clattering is not a malfunction, but occurs when the unit is returning to the default setting for optimised control.

• While an indoor unit is running in the heating mode, the outdoor unit supplies refrigerant to the other indoor units which are not running. Therefore, noise may come from the other indoor units or the exterior of them may become warm.

 Pump-down Operation

Pump-down Operation (Recovering refrigerant)
CAUTION
Since the forcible running for collecting refrigerant stops automatically after 10 minutes, nish collecting refrigerant within 10 minutes.
**** Electric current is applied on the control board. Beware of electric shock.

• The following must be certainly done during pump down.
• Do not incorporate air into the refrigeration cycle.
•  Close the service valves. Stop the compressor and remove the refrigerant pipe.
  If the refrigerant pipe is removed when the compressor is operating and service valves are opened, the refrigerant cycle will inhale unwanted matter such as air and the pressure in the cycle becomes abnormally elevated. It may cause a burst or injury.

1. Remove the valve cover screws.
2.  Pull the valve cover in the direction of arrow, and remove it.
3. Turn on the circuit breaker to supply electricity.
   In the initial LED display status, D805 is lighted as below.
   : ON,
   : OFF, : Rapid Flashing (5 times/sec.),
   ¯ : Slow Flashing (1 time/sec.)D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   | | | | |
4. Hold down SW01 for at least 5 seconds, and check that D800 is lighted and D804 light is ashing (1 time/sec.).
   D800| D801| D802| D803| D804| D805
   ---|---|---|---|---|---
   | | | | |

5. Press SW01 for 1 time. Then D804 light is ashing (5 times/sec.).

6. Press SW02 for 1 time. Then D805 light is ashing (5 times/sec.).

7. Hold down SW02 for at least 5 seconds. Then outdoor unit start cooling mode.
(The display is kept during the refrigerants collection operation.)

8. Close the valve stem of the service valve at the liquid end.
9. Make sure that the compound pressure gauge reading is –101 kPa (–76 cmHg)
10. Close the valve stem of the service valve at the gas end.
11. The refrigerants collection operation is nished in maximum 10 minutes. After the collection is nished, promptly stop the operation of all the indoor unit.
(There are cases that the compressor restarts.)
12. When you want to start over the operation of the SW01 and SW02, press the SW01 and SW02 at the same time for 5 sec. (It back to the initial condition of 3.)
However, do not execute the operation during the refrigerants collection.
If by any chance the collection is stopped by the operation, start over the refrigerants collection operation.

Troubleshooting

You can perform fault diagnosis of the outdoor unit with the LEDs on the P.C.
board of the outdoor unit in addition to using the check codes displayed on the remote controller of the indoor unit.
Use the LEDs and check codes for various checks. Details of the check codes displayed on the remote controller of the indoor unit are described in the Installation Manual of the indoor unit.
LED displays and check codes
: ON ( * : 3 sec ON/0.5 sec OFF), : OFF

Display| Indoor check code|

Description

---|---|---
D800 (YL)| D801 (YL)| D802 (YL)| D803 (YL)| D804 (YL)| D805 (GN)
| | | | |

| –| Normal operation (no error)
| | | | | 1C| Compressor case thermostat error
| | | | | 21| High pressure switch error
| | | | | 1C| Compressor system error
| | | | | 1D| Compressor lock
| | | | | 1F| Compressor breakdown
| | | | | 14| Driving element short circuit
| | | | | 16| Position detection circuit error
| | | | | 17| Current detection circuit error
| | | | | 1C| Communication error between MCU
| | | | | 1A| Fan system error
| | | | | 1E| Discharge temperature error
| | | | |

19

| Discharge temperature sensor (TD) error
| | | | |

1B

| Outdoor air temperature sensor (TO) error
| | | | |

18

| Suction temperature sensor (TS) error
| | | | |

18

| Heat exchanger temperature sensor (TE) error
| | | | |

1C

| Gas pipe (unit A) temperature sensor (TGa) error
| | | | |

1C

| Gas pipe (unit B) temperature sensor (TGb) error
| | | | |

1C

| Gas pipe (unit C) temperature sensor (TGc) error
| | | | | –| PMV error (SH•20)
| | | | | –| PMV error (SH”–8)
| | | | | 20| PMV leakage error (unit A)
| | | | | 20| PMV leakage error (unit B)
| | | | | 20| PMV leakage error (unit C)
| | | | | –| Miswiring (mispiping) check error

Appendix

Work instructions
The existing R22 and R410A piping can be reused for inverter R32 product installations.
WARNING
rming the existence of scratches or dents on the existing pipes and con Con rming the reliability of the pipe strength are conventionally referred to the local site.
If the specied conditions can be cleared, it is possible to update existing R22 and R410A pipes to those for R32 models.
Basic conditions needed to reuse existing pipes
Check and observe the presence of three conditions in the refrigerant piping works.

1. Dry (There is no moisture inside of the pipes.)
2. Clean (There is no dust inside of the pipes.)
3.  Tight (There are no refrigerant leaks.)

Restrictions for use of existing pipes
In the following cases, the existing pipes should not be reused as they are.
Clean the existing pipes or exchange them with new pipes.

1. When a scratch or dent is heavy, be sure to use new pipes for the refrigerant piping works.
2. When the existing pipe thickness is thinner than the specied “Pipe diameter and thickness,” be sure to use new pipes for the refrigerant piping works.
   • The operating pressure of R32 is high (1.6 times that of R22). If there is a scratch or dent on the pipe or a thinner pipe is used, the pressure strength may be inadequate, which may cause the pipe to break in the worst case.

• Pipe diameter and thickness (mm)Pipe outer diameter	Ø6.4	Ø9.5	Ø12.7
  Thickness	R32, R410A	0.8	0.8

  R22
  3.  When the outdoor unit was left with the pipes
  disconnected, or the gas leaked from the pipes and
  the pipes were not repaired and relled.
  • There is the possibility of rain water or air, including moisture, entering the pipe.

  4.  When refrigerant cannot be recovered using a refrigerant recovery unit.
     • There is the possibility that a large quantity of dirty oil or moisture remains inside the pipes.

  5. When a commercially available dryer is attached to the existing pipes.
     • There is the possibility that copper green rust has been generated.

  6. When the existing air conditioner is removed after refrigerant has been recovered.
     Check if the oil is judged to be clearly different from normal oil.
     • The refrigerator oil is copper rust green in color:
     There is the possibility that moisture has mixed with the oil and rust has been generated inside the pipe.
     • There is discolored oil, a large quantity of residue, or a bad smell.
     • A large quantity of shiny metal dust or other wear residue can be seen in the refrigerant oil.

  7.  When the air conditioner has a history of the  compressor failing and being replaced.
     • When discolored oil, a large quantity of residue, shiny metal dust, or other wear residue or mixture of foreign matter is observed, trouble will occur.

  8.  When temporary installation and removal of the air conditioner are repeated such as when leased etc.

  9.  If the type of refrigerator oil of the existing air conditioner is other than the following oil (Mineral oil), Suniso, Freol-S, MS (Synthetic oil), alkyl benzene (HAB, Barrel-freeze), ester series, PVE only of ether series.
     • The winding-insulation of the compressor may deteriorate.

  10.  When total pipe length is longer than the maximum length for total unit, speci ed in clause 3, be sure to use new pipes for the refrigerant piping works.

NOTE
The above descriptions are results have been conrmed by our company and represent our views on our air conditioners, but do not guarantee the use of the existing pipes of air conditioners that have adopted
R32 in other companies.
Curing of pipes
When removing and opening the indoor or outdoor unit for a long time, cure the pipes as follows:

• Otherwise rust may be generated when moisture or foreign matter due to condensation enters the pipes.
• The rust cannot be removed by cleaning, and new pipes are necessary.

Toshiba Carrier (Thailand) Co.;Ltd.
144 / 9 Moo 5, Bangkadi Industrial Park, Tivanon Road, Tambol Bangkadi, Amphur Muang, Pathumthani 12000, Thailand
1116691096

Documents / Resources

| TOSHIBA RAS-2M18G3AVG-E RAS Multi-split Inverter Outdoor [pdf] Installation Guide
RAS-2M18G3AVG-E, RAS-3M18G3AVG-E, RAS-2M18G3AVG-E RAS Multi-split Inverter Outdoor, RAS Multi-split Inverter Outdoor, Multi-split Inverter Outdoor, Inverter Outdoor, Outdoor
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