Toshiba RAS-B16GKVP-E, RAS-16GAVP-E, RAS-10GAVP-E, RAS-B13GKVP-E, RAS-13GAVP-E User Manual

FILE NO. A05-008

SERVICE MANUAL

SPLIT TYPE

Indoor Unit Outdoor Unit

<High Wall, Heat Pump Type> <Heat Pump Type>

RAS-B10GKVP-E RAS-10GAVP-E
RAS-B13GKVP-E RAS-13GAVP-E
RAS-B16GKVP-E RAS-16GAVP-E

R410A

PRINTED IN JAPAN, Nov.,2005 ToMo

CONTENTS

1. SAFETY PRECAUTIONS .......................................................................... 3

2. SPECIFICATIONS ..................................................................................... 5

3. REFRIGERANT R410A ............................................................................. 7

4. CONSTRUCTION VIEWS ........................................................................ 15

5. WIRING DIAGRAM .................................................................................. 17

6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 18

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 19

8. CONTROL BLOCK DIAGRAM................................................................ 22

9. OPERATION DESCRIPTION................................................................... 24

10. INSTALLATION PROCEDURE................................................................ 47

11. HO W TO DIA GNOSE THE TROUBLE...................................................... 60

12. HOW TO REPLACE THE MAIN PARTS................................................... 82

13. EXPLODED VIEWS AND PARTS LIST ................................................. 101

Cord Heater Installation Work ........................................................ Appendix-1

– 2 –

1. SAFETY PRECAUTIONS

For general public use

Power supply cord of outdoor unit shall be more than 1.5 mm 2 (H07RN-F or 245IEC66) polychloroprene
sheathed flexible cord.

• Read this “SAFETY PRECAUTIONS” carefully before servicing.

• The precautions described below include the important items regarding safety. Observe them without fail.

• After the servicing work, perform a trial operation to check for any problem.

• Turn off the main power supply switch (or breaker) before the unit maintenance.

CAUTION

New Refrigerant Air Conditioner Installation

• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT
DESTROY OZONE LAYER.

R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because
the working pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the
adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during
installation work, be sure that water , dust, former refrigerant, or refrigeration machine oil does not enter into
the new type refrigerant R410A air conditioner circuit.

To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging
port on main unit and installation tools are different from those used for the conventional refrigerant units.

Accordingly, special tools are required for the new refrigerant (R410A) units . For connecting pipes, use new
and clean piping materials with high pressure fittings made for R410A only, so that water and/or dust does
not enter. Moreover, do not use the existing piping because there are some problems with pressure fittings
and possible impurities in existing piping.

CAUTION

TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY

This appliance must be connected to the main power supply by a circuit breaker or a switch with a contact
separation of at least 3 mm.

The installation fuse (25A D type ) must be used for the power supply line of this air conditioner.

DANGER

• ASK AN AUTHORIZED DEALER OR QUALIFIED INSTALLATION PROFESSIONAL TO IN­STALL/MAINTAIN THE AIR CONDITIONER.

INAPPROPRIATE SERVICING MAY RESULT IN WATER LEAKAGE, ELECTRIC SHOCK OR FIRE.

• 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.

DANGER: HIGH VOLTAGE

The high voltage circuit is incorporated.
Be careful to do the check service, as the electric shock may be caused in case of touching parts

on the P.C. board by hand.

• CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCOR­RECTLY CONNECTED, ELECTRIC PARTS MAY BE DAMAGED.

• CHECK THAT THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE SERVICE AND
INSTALLATION. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

– 3 –

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE

TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

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

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CARE­FUL NOT TO ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY
OTHER GASEOUS BODY INTO THE REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS
MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL
BECOME ABNORMALLY HIGH AND IT MAY RESUL T IN THE PIPE BURSTING AND POSSIBLE PER­SONNEL INJURIES.

• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE
WORK AND THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE
REFRIGERANT GAS IS HEATED, SUCH AS BY FIRE, GENERATION OF POISONOUS GAS MAY
RESULT.

WARNING

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

• Do not install in a place which cannot bear the weight of the unit. Personal injury and property
damage can result if the unit falls.

• After the installation work, confirm that refrigerant gas does not leak.

If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas
may generate.

• The electrical work must be performed by a qualified electrician in accordance with the Installation
Manual. Make sure the air conditioner uses an exclusive circuit.

An insufficient circuit capacity or inappropriate installation may cause fire.

• When wiring, use the specified cables and connect the terminals securely to prevent external
forces applied to the cable from affecting the terminals.

• Be sure to provide grounding.

Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.

• Conform to the regulations of the local electric company when wiring the power supply.

Inappropriate grounding may cause electric shock.

CAUTION

• Exposure of unit to water or other moisture bef ore installation may result in an electrical short.
Do not store in a wet basement or expose to rain or water.

• 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 or discharged air might disturb neighbors.

• To avoid personal injury, be careful when handling parts with sharp edges.

• Perform the specified installation work to guard against an earthquake.

If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

For Reference:

If a heating operation would be continuously perf ormed for a long time under the condition that the outdoor
temperature is 0°C or lower, drainage of defrosted water may be difficult due to freezing of the bottom plate,
resulting in a trouble of the cabinet or fan.

It is recommended to procure an antifreeze heater locally for a safe installation of the air conditioner.
For details, contact the dealer.

– 4 –

2. SPECIFICATIONS

2-1. Specifications

RAS-B10GKVP-E/RAS-B13GKVP-E/RAS-B16GKVP-E, RAS-10GAVP-E/RAS-13GAVP-E/RAS-16GAVP-E

Unit model
Cooling capacity (kW) 2.5 3.5 4.5

Cooling capacity range (kW) 0.5–3.5 0.6–4.5 0.8–5.0
Heating capacity (kW) 3.2 4.2 5.5
Heating capacity range (kW) 0.6–5.8 0.6–6.6 0.8–7.8
Power supply 1 Ph/50Hz/220–240 V, 1 Ph/60Hz/220 V

Electric
characteristics

COP (Cooling/Heating) 4.55/4.51 3.80/4.31 3.26/3.64

Operating
noise

Indoor unit

Outdoor unit

Piping
connection

Refrigerant
Wiring

connection
Usable temperature range

Accessory

Indoor
Outdoor

Operati on mode

Indoor

Outdoor

Indoor

Outdoor (Cooling/Heating) (dB•A) 46/47 48/50 49/50
Unit model

Net weight (kg) 9 9 9
Fan motor output (W) 30 30 30
Air flow rate (Cooling/Heating) (m³/h) 550/610 560/640 640/660
Unit model

Dimension

Net weight (kg) 35 37 37

Fan motor output (W) 43 43 43
Air flow rate (Cooling/Heating) (m³/h) 2150/2150 2410/2410 2410/2410
Type Flare connection F lare con nection Flare connection

Indoor unit

Outdoor unit
Maxi mum length (m) 25 25 25

Maximum chargeless length (m) 15 15 15
Maximum height difference (m) 10 10 10
Name of refrigerant R410A R410A R410A
Weight (kg) 0.82 0.96 0.96
Power supply 3 Wires : includes earth (Outdoor)
Interconnection 4 Wires : includes earth

Indoor unit

Outdoor unit

Running current (A) 0.15 0.15 0.15 0.15 0.15 0.15
Power consumption (W) 30 30 30 30 30 30
Power factor (%)878787878787
Operati on mode
Running current (A)
Power consumption (W) 520 680 890 945 1350 1480
Power factor (%)959595959595
Starting current (A) 3.40/3.25/3.11 4.67/4.46/4.28 7.22/6 .9 1/6.62

High (Cooling/Heating) (dB•A) 42/43 43/44 45/45
Medium (Cooling/Heating) (dB•A) 33/34 34/35 36/36
Low (Cooling/Heating) (dB•A) 27/27 27/27 29/29

Height (mm) 250 250 250
Width (mm) 790 790 790Dimension
Depth (mm) 215 215 215

Height (mm) 550 550 550
Width (mm) 780 780 780
Depth (mm) 290 290 290

Motor output (W) 750 750 750
Type Twin rotary type with DC-inver t er variable speed controlCompressor
Model DA111A1F-20F1 DA111A1F-20F1 DA111A1F-20F1

Liquid side Ø6.35 Ø6.35 Ø6.35
Gas side Ø9.52 Ø9.52 Ø12.7
Liquid side Ø6.35 Ø6.35 Ø6.35
Gas side Ø9.52 Ø9.52 Ø12.7

Indoor (Cooling/Heating) (°C) 21–32/0–28 21–32/0–28 21–32/0–28
Outdoor (Cooling/Heating) (°C) 5–43/–15–24 5–43/–15–24 5–43/–15–24
Installation plate 1 1 1
Wireless remote controller 1 1 1
Batteries 222
Remote controller holder 1 1 1
Zeolite-plus filter 1 1 1
Mounting screw 6 (Ø4 × 25L) 6 (Ø4 × 25L) 6 (Ø4 × 25L)
Remote controller holder

mounting screw
Plasma pure filter 1 1 1
Installation manual 1 1 1
Owner’s manual 1 1 1
Drain nipple 1 1 1
Water-proof rubber cap 2 2 2

• The specifications may be subject to change without notice for purpose of improvement.

RAS-B10GKVP-E RAS-B13GKVP-E RAS-B16GKVP-E

RAS-10GAVP-E RAS-13GAVP-E RAS-16GAVP-E

Cooling Heating Cooling Heating Cooling Heating

Cooling Heating Cooling Heating Cooling Heating

2.48/2.37/2.26 3.25/3.10/2.96 4.25/4.06/3.89 4.52/4.31/4.13 6.45/6.17/5.90 7.07/6.76/6.47

RAS-B10GKVP-E RAS-B13GKVP-E RAS-B16GKVP-E

RAS-10GAVP-E RAS-13GAVP-E RAS-16GAVP-E

2 (Ø3.1 × 16L) 2 (Ø3.1 × 16L) 2 (Ø3.1 × 16L)

– 5 –

2-2. Operation Characteristic Curve

<Cooling> <Heating>

10 10

99

8

7

6

5

4

Current (A)

3

2

1

0

RAS-B10GKVP-E
RAS-B13GKVP-E
RAS-B16GKVP-E

• Conditions
Indoor : DB 27˚C/WB 19˚C
Outdoor : DB 35˚C
Air flow : High
Pipe length : 7.5m
Voltage : 230V

0 20406080 120100

Compressor speed (rps)

8

7

6

5

4

Current (A)

3

2

1

0

0 20406080 120140 140

2-3. Capacity Variation Ratio According to Temperature

RAS-B10GKVP-E
RAS-B13GKVP-E
RAS-B16GKVP-E

• Conditions
Indoor : DB 20˚C
Outdoor : DB 7˚C/WB 6˚C
Air flow : High
Pipe length : 7.5m
Voltage : 230V

100

Compressor speed (rps)

<Cooling> <Heating>

110

100

90

80

Capacity ratio (%)

70

60

50

32

34 36 38 40 4233 35 37 39 41 43 44 45 46

RAS-B10GKVP-E
RAS-B13GKVP-E
RAS-B16GKVP-E

• Conditions
Indoor : DB27˚C/WB19˚C
Indoor air flow : High
Pipe length : 7.5m

Outdoor temp. (˚C)

120

100

80

60

Capacity ratio (%)

40

20

0
–15 –10 –50 510

RAS-B10GKVP-E
RAS-B13GKVP-E
RAS-B16GKVP-E

• Conditions
Indoor : DB 20˚C
Indoor air flow : High
Pipe length : 7.5m

Outdoor temp. (˚C)

Capacity ratio : 100% = 2.5 kW (RAS-B10GKVP-E)

*

3.5 kW (RAS-B13GKVP-E)

4.5 kW (RAS-B16GKVP-E)

– 6 –

3. REFRIGERANT R410A

This air conditioner adopts the new refrigerant HFC
(R410A) which does not damage the ozone layer.

The working pressure of the new refrigerant R410A
is 1.6 times higher than conventional refrigerant
(R22). The refrigerating oil is also changed in
accordance with change of refrigerant, so be careful
that water , dust, and existing refrigerant or refrigerat­ing oil are not entered in the refrigerant cycle of the
air conditioner using the new refrigerant during
installation work or servicing time.

The next section describes the precautions for air
conditioner using the new refrigerant. Conforming to
contents of the next section together with the
general cautions included in this manual, perform
the correct and safe work.

3-1. Safety During Installation/Servicing

As R410A’s pressure is about 1.6 times higher than
that of R22, improper installation/servicing may
cause a serious trouble. By using tools and materi­als exclusive for R410A, it is necessary to carry out
installation/servicing safely while taking the following
precautions into consideration.

1. Never use refrigerant other than R410A in an air
conditioner which is designed to operate with
R410A.

If other refrigerant than R410A is mixed, pressure
in the refrigeration cycle becomes abnormally
high, and it may cause personal injury, etc. by a
rupture.

2. Confirm the used refrigerant name, and use tools
and materials exclusive for the refrigerant R410A.

The refrigerant name R410A is indicated on the
visible place of the outdoor unit of the air condi­tioner using R410A as refrigerant. To prevent
mischarging, the diameter of the service port
differs from that of R22.

3. If a refrigeration gas leakage occurs during
installation/servicing, be sure to ventilate fully.

If the refrigerant gas comes into contact with fire,
a poisonous gas may occur.

4. When installing or removing an air conditioner, do
not allow air or moisture to remain in the refrig­eration cycle. Otherwise, pressure in the refrig­eration cycle may become abnormally high so
that a rupture or personal injury may be caused.

5. After completion of installation work, check to
make sure that there is no refrigeration gas
leakage.

If the refrigerant gas leaks into the room, coming
into contact with fire in the fan-driven heater,
space heater, etc., a poisonous gas may occur.

6. When an air conditioning system charged with a
large volume of refrigerant is installed in a small
room, it is necessary to exercise care so that,
even when refrigerant leaks, its concentr ation
does not exceed the marginal le vel.

If the refrigerant gas leakage occurs and its
concentration exceeds the marginal le vel, an
oxygen starvation accident ma y result.

7. Be sure to carry out installation or removal
according to the installation manual.

Improper installation may cause refrigeration
trouble, water leakage , electric shock, fire, etc.

8. Unauthorized modifications to the air conditioner
may be dangerous. If a breakdown occurs
please call a qualified air conditioner technician
or electrician.

Improper repair’s may result in water leakage,
electric shock and fire, etc.

3-2. Refrigerant Piping Installation

3-2-1. Piping Materials and Joints Used

For the refrigerant piping installation, copper pipes
and joints are mainly used. Copper pipes and joints
suitable for the refrigerant m ust be chosen and
installed. Furthermore, it is necessary to use clean
copper pipes and joints whose interior surfaces are
less affected by contaminants .

1. Copper Pipes

It is necessary to use seamless copper pipes
which are made of either copper or copper alloy
and it is desirable that the amount of residual oil
is less than 40 mg/10 m. Do not use copper
pipes having a collapsed, deformed or discolored
portion (especially on the interior surface).

Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.

As an air conditioner using R410A incurs pres­sure higher than when using R22, it is necessary
to choose adequate materials.

Thicknesses of copper pipes used with R410A
are as shown in Table 3-2-1. Never use copper
pipes thinner than 0.8 mm even when it is
available on the market.

– 7 –

Table 3-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

Nominal diameter

1/4
3/8
1/2
5/8

Outer diameter (mm)

6.35

9.52

12.70

15.88

R410A R22

0.80 0.80

0.80 0.80

0.80 0.80

1.00 1.00

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.

Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 3-2-3 to 3-2-6 below.

b) Socket Joints

Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose
diameter is larger than 20 mm.

Thicknesses of sock et joints are as shown in Table 3-2-2.

Table 3-2-2 Minimum thicknesses of socket joints

Nominal diameter

1/4
3/8
1/2
5/8

Reference outer diameter of

copper pipe jointed (mm)

6.35

9.52

12.70

15.88

Minimum joint thickness

(mm)

0.50

0.60

0.70

0.80

3-2-2. Processing of Piping Materials

When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not
enter the pipe interior, that no other oil than lubricating oils used in the installed air-water heat pump is used,
and that refrigerant does not leak. When using lubricating oils in the piping processing, use such lubricating oils
whose water content has been removed. When stored, be sure to seal the container with an airtight cap or any
other cover.

1. Flare processing procedures and precautions

a) Cutting the Pipe

By means of a pipe cutter, slowly cut the pipe so that it is not deformed.

b) Removing Burrs and Chips

If the flared section has chips or burrs, refrigerant leakage may occur.
Carefully remove all burrs and clean the cut surface before installation.

c) Insertion of Flare Nut

– 8 –

d) Flare Processing

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. When using a con­ventional flare tool, be sure to secure “dimen-
sion A” by using a gauge for size adjustment.

Table 3-2-3 Dimensions related to flare processing for R410A

Nominal

diameter

Outer

diameter

(mm)

Thickness

(mm)

Fig. 3-2-1 Flare pr ocessing dimensions

Flare tool for R410A

clutch type

ØD

A

A (mm)

Conventional flare tool

Clutch type Wing nut type

1/4
3/8
1/2
5/8

Nominal

diameter

1/4
3/8
1/2
5/8

6.35

9.52

12.70

15.88

0.8

0.8

0.8

1.0

0 to 0.5
0 to 0.5
0 to 0.5
0 to 0.5

Table 3-2-4 Dimensions related to flare processing for R22

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

0.8

0.8

1.0

Flare tool for R22

clutch type

0 to 0.5
0 to 0.5
0 to 0.5
0 to 0.5

1.0 to 1.5 1.5 to 2.0

1.0 to 1.5 1.5 to 2.0

1.0 to 1.5 2.0 to 2.5

1.0 to 1.5 2.0 to 2.5

A (mm)

Conventional flare tool

Clutch type Wing nut type

0.5 to 1.0 1.0 to 1.5

0.5 to 1.0 1.0 to 1.5

0.5 to 1.0 1.5 to 2.0

0.5 to 1.0 1.5 to 2.0

Nominal

diameter

1/4
3/8
1/2
5/8

Table 3-2-5 Flare and flare nut dimensions for R410A

Outer diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

0.8

0.8

1.0

Dimension (mm)

ABCD

9.1 9.2 6.5 13

13.2 13.5 9.7 20

16.6 16.0 12.9 23

19.7 19.0 16.0 25

– 9 –

Flare nut width

(mm)

17
22
26
29

Table 3-2-6 Flare and flare nut dimensions for R22

Nominal

diameter

1/4
3/8
1/2
5/8
3/4

Outer diameter

(mm)

6.35

9.52

12.70

15.88

19.05

45˚ to 46˚

Thickness

(mm)

0.8

0.8

0.8

1.0

1.0

B A

Dimension (mm)

ABCD

9.0 9.2 6.5 13

13.0 13.5 9.7 20

16.2 16.0 12.9 20

19.7 19.0 16.0 23

23.3 24.0 19.2 34

D

C

43˚ to 45˚

Flare nut width

(mm)

17
22
24
27
36

Fig. 3-2-2 Relations between flare nut and flare seal surface

2. Flare Connecting Procedures and Precautions

a) Make sure that the flare and union portions do not have any scar or dust, etc.
b) Correctly align the processed flare surface with the union axis .
c) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A is

the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur.
When it is strong, the flare nut may crack and may be made non-removable. When choosing the tighten-

ing torque, comply with values designated by man ufacturers. Table 3-2-7 shows reference values.

NOTE :

When applying oil to the flare surface, be sure to use oil designated by the manufacturer.
If any other oil is used, the lubricating oils may deteriorate and cause the compressor to burn out.

Table 3-2-7 Tightening torque of flare for R410A [Reference values]

Nominal

diameter

Outer diameter

(mm)

Tightening torque

N•m (kgf•cm)

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

1/4
3/8
1/2
5/8

6.35

9.52

12.70

15.88

14 to 18 (140 to 180)
33 to 42 (330 to 420)
50 to 62 (500 to 620)
63 to 77 (630 to 770)

– 10 –

16 (160), 18 (180)

42 (420)
55 (550)
65 (650)

3-3. Tools

3-3-1. Required T ools

The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is
changed to prev ent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing
dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are
lengthened.

The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,
clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.

1. Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))

2. Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)

3. Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

air-water heat pump installation

No.

1

2

3

4
5
6

7
8

9

10

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection

(Note 2) Charging cylinder for R410A is being currently developed.

Used tool

Flare tool
Copper pipe gauge for

adjusting projection
margin

Torque wrench
(For Ø12.7)

Gauge manifold
Charge hose
Vacuum pump adapter

Electronic balance for
refrigerant charging

Refrigerant cylinder
Leakage detector
Charging cylinder

margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

Pipe flaring
Flaring by

conventional flare tool

Connection of flare nut

Evacuating, refrigerant
charge, run check, etc.

Vacuum evacuating
Refrigerant charge
Refrigerant charge

Gas leakage check
Refrigerant charge

Usage

Existence of
new equipment
for R410A

Yes

Yes

Yes

Yes

Yes
Yes
Yes

Yes

(Note 2)

R410A

Whether conven­tional equipment
can be used

*(Note 1)

*(Note 1)

×
×

×
×
×

×
×

Conventional air-water
heat pump installation

Whether new equipment
can be used with
conventional refrigerant

¡

*(Note 1)

×
×

¡

¡

×

¡

×

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also f or R22 are necessary
as the general tools.

1. Vacuum pump
Use vacuum pump by attaching
vacuum pump adapter.

2. Torque wrench (For Ø6.35, Ø9.52)

3. Pipe cutter

4. Reamer

5. Pipe bender

6. Level vial

7. Screwdriver (+, –)

8. Spanner or Monkey wrench

9. Hole core drill (Ø65)

10. Hexagon wrench
(Opposite side 4mm)

11 . Tape measure

12. Metal saw

Also prepare the following equipments for other installation method and run check.

1. Clamp meter

2. Thermometer

3. Insulation resistance tester

4. Electroscope

– 11 –

3-4. Recharging of Refrigerant

When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the
following steps .

Recover the refrigerant, and check no refrigerant
remains in the equipment.

Connect the charge hose to packed valve service
port at the outdoor unit’s gas side.

Connect the charge hose to the vacuum pump
adapter.

Open fully both packed valves at liquid and gas
sides.

When the compound gauge’s pointer has indicated
–0.1 Mpa (–76 cmHg), place the handle Low in the
fully closed position, and turn off the vacuum pump’s
power switch.

Keep the status as it is for 1 to 2 minutes, and ensure
that the compound gauge’s pointer does not return.

Set the refrigerant cylinder to the electronic balance,
connect the connecting hose to the cylinder and the
connecting port of the electronic balance, and charge
liquid refrigerant.

Place the handle of the gauge manifold Low in the
fully opened position, and turn on the vacuum pump’s
power switch. Then, evacuating the refrigerant in the
cycle.

(For refrigerant charging, see the figure below.)

1. Never charge refrigerant exceeding the specified amount.

2. If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.

3. Do not carry out additional charging.
When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the

refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the
specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high
pressure, and may cause a rupture or personal injury.

(Water heat
exchanger unit)

Opened

(Outdoor unit)

Refrigerant cylinder

(with siphon)

Check valve

Opened
Open/close
valve for charging

Electronic balance for refrigerant charging

Fig. 3-4-1 Configuration of refrigerant charging

Opened

Closed

Service port

– 12 –

1. Be sure to make setting so that liquid can be charged.

2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.

It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.
Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the
cylinder upside down if cylinder is not equipped with siphon.

[ Cylinder with siphon ] [ Cylinder without siphon ]

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

cylinder

Refrigerant

Electronic

balance

R410A refrigerant is HFC mixed refrigerant.
Therefore, if it is charged with gas, the composi­tion of the charged refrigerant changes and the
characteristics of the equipment varies.

3-5. Brazing of Pipes

3-5-1. Materials for Brazing

1. Silver brazing filler

Silver brazing filler is an allo y mainly composed
of silver and copper. It is used to join iron, copper
or copper alloy, and is relatively expensive though
it excels in solderability.

2. Phosphor bronze brazing filler

Phosphor bronze brazing filler is generally used
to join copper or copper alloy.

Electronic

balance

Siphon

Fig. 3-4-2

1. Phosphor bronze brazing filler tends to react
with sulfur and produce a fragile compound
water solution, which may cause a gas
leakage. Therefore, use any other type of
brazing filler at a hot spring resort, etc., and
coat the surface with a paint.

2. When performing brazing again at time of
servicing, use the same type of brazing filler.

3-5-2. Flux

3. Low temperature brazing filler

Low temperature brazing filler is generally called
solder, and is an alloy of tin and lead. Since it is
weak in adhesive strength, do not use it for
refrigerant pipes.

1. Reason why flux is necessary

• By removing the o xide 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.

• By reducing the brazing filler’s surface tension,
the brazing filler adheres better to the treated
metal.

– 13 –

2. Characteristics required for flux

• Activated temperature of flux coincides with the
brazing temperature.

• Due to a wide eff ective temperature range, flux
is hard to carbonize.

• It is easy to remov e slag after brazing.

• The corrosive action to the treated metal and

brazing filler is minimum.

• It excels in coating performance and is harm­less to the human body.

As the flux works in a complicated manner as
described above, it is necessary to select an
adequate type of flux according to the type and
shape of treated metal, type of brazing filler and
brazing method, etc.

3. Types of flux

• Noncorrosive flux

Generally, it is a compound of borax and boric
acid.
It is effective in case where the brazing tem­perature is higher than 800°C.

• Activated flux

Most of fluxes generally used for silver brazing
are this type.
It features an increased o xide film removing
capability due to the addition of compounds
such as potassium fluoride, potassium chloride
and sodium fluoride to the borax-boric acid
compound.

4. Piping materials for brazing and used
brazing filler/flux

3-5-3. Brazing

As brazing work requires sophisticated techniques,
experiences based upon a theoretical knowledge, it
must be performed by a person qualified.

In order to prev ent the oxide film from occurring in
the pipe interior during brazing, it is effective to
proceed with brazing while letting dry Nitrogen gas
(N2) flow.

Never use gas other than Nitrogen gas.

1. Brazing method to prevent oxidation

1) Attach a reducing valve and a flow-meter to
the Nitrogen gas cylinder.

2) Use a copper pipe to direct the piping mate­rial, and attach a flow-meter to the cylinder.

3) Apply a seal onto the clearance between the
piping material and inserted copper pipe for
Nitrogen in order to prevent backflow of the
Nitrogen gas.

4) When the Nitrogen gas is flowing, be sure to
keep the piping end open.

5) Adjust the flow rate of Nitrogen gas so that it
is lower than 0.05 m3/Hr or 0.02 MPa
(0.2kgf/cm2) by means of the reducing valve.

6) After performing the steps above, keep the
Nitrogen gas flowing until the pipe cools down
to a certain extent (temperature at which
pipes are touchable with hands).

7) Remove the flux completely after br azing.

Piping material

Copper - Copper

Copper - Iron

Iron - Iron

Used brazing filler

Phosphor copper

Silver
Silver

Used flux

Do not use

Paste flux
Vapor flux

1. Do not enter flux into the refrigeration cycle.

2. When chlorine contained in the flux remains
within the pipe, the lubricating oil deteriorates.
Therefore, use a flux which does not contain
chlorine.

3. When adding water to the flux, use water
which does not contain chlorine (e.g. distilled
water or ion-exchange water).

4. Remove the flux after brazing.

M

Flow meter

Stop valve

Nitrogen gas

cylinder

From Nitrogen cylinder

Pipe

Nitrogen
gas

Rubber plug

Fig. 3-5-1 Prevention of oxidation during brazing

– 14 –

4-1. Indoor Unit

RAS-B10GKVP-E
RAS-B13GKVP-E
RAS-B16GKVP-E

4. CONSTRUCTION VIEWS

790

Plasma pure filter

Front panel

Indoor heat exchanger

790

Air filter

215

250

60
7

53

Knockout system Knockout system

Zeolite-plus filter

53

Air ionizer

53

6054.5

60 54.5

Installation plate hanging section

53

64

Wireless remote controller

60
7

Remote controller holder

5

125.5

250

Installation plate
hanging section

Minimum
distance
to wall

140 or more

167.5
42

3

91

Lower part
hanging section

Center line
of main unit

290

Connecting pipe
(Outside length:0.4m)
Flare Ø9.52
(RAS-B16GKVP-E : Ø12.7)

674

Hanging
section

450
288

47 or more

Minimum
distance
to ceilinfg

1010

Outline of
installation plate

Center line of
installation plate

790

Drain hose
(Outside length:0.54m)

Connecting pipe
(Outside length:0.45m)
Flare Ø6.35

25

1010

Stud bolt hole
for Ø6

Stud bolt hole
for Ø8 to Ø10

Minimum
distance
to wall

74 or more

42

9130430491

58

19

163

Parts name of remote controller

WH-H03JE

– 15 –

4-2. Outdoor Unit

RAS-10GAVP-E, RAS-13GAVP-E, RAS-16GAVP-E

69.5 147

leg part

A

2-Ø20x88 drain long hole

145.5

320

306

290

30

Ø7 hole pitch

(Anchor bort

long hole pitch)

leg part

B

218

550

449

483 6

52

35

Fan guard

Ø25 drain hole

600 90

108

60

483

50032

125

108

780

Ø11-14U-shape hole

54

30

(for Ø8-Ø10 anchor bolt)

Connecting pipe port

Pipe dia. Ø9.52:RAS-10GAVP-E, RAS-13GAVP-E

( )

Ø12.7:RAS-16GAVP-E

Connecting pipe port
(Pipe dia. Ø6.35)

8-Ø7 hole

20

(for fixing outdoor unit)
Ø11x14 long hole

(for Ø8-Ø10 anchor bolt)

257

Packed valve cover

25
22

93

71

31 143

137

157 79

21

145

Z

54

342

Charging port

4-Ø4.5 embossment

When installing the outdoor unit,
leave open in at least two of
directions (A), (B), (C) and (D)
shown in the figure below.

Mounting dimensions of anchor bolt

2-Ø11x14U- Shape hole
(for Ø8-Ø10 anchor bolt)

Intake

320

C

100 or more

200 or more

D

50 or more

B

Outlet

600

Z

Intake

Outside line
of product

view

250 or more

A

Minimum distance
from wall

2-Ø11x14 long hole
(for Ø8-Ø10 anchor bolt)

Fin guard

Detailed leg part

320 320

Detailed leg part

R5.5

A

600

54

38

11

R15

2-Ø7 hole

Outside line
of product

11

Outside line
of product

2-

Ø7 hole

R15

R5.5

38

54

600

B

– 16 –

5. WIRING DIAGRAM

5-1. Outdoor Unit

RAS-10GAVP-E, RAS-13GAVP-E, RAS-16GAVP-E

5-2. Indoor Unit

RAS-B10GKVP-E, RAS-B13GKVP-E, RAS-B16GKVP-E

1
2
3
4
5
6

FUSE

F01

AC 250V

T3.15A

CN08 (WHI)

BLK

1
2
3
4
5
6

21 43

High-voltage

Power supply

Ion electrode

Air purifier

TNR

Electrode

BLK
BLK

HEAT EXCHANGER

SENSOR (TC)

BLK
BLK

THERMO SENSOR

(TA)

CN100

(WHI)

BLU

1

1

BLU

2

2

BLU

3

3

BLU

4

4

BLU

5

5

BLU

6

6

BLU

7

7

BLU

8

8

9

10 10

WHI

9

Wireless Unit Assembly

MCC-899

1 2 3 4
1 2 3 4

RED

BRW

1 2 3 4
1 2 3 4

CN01
(BLU)

121

CN03
(WHI)

121

CN13
(WHI)

9
8
7
6
5
4
3
2
1

CN33
(WHI)

2

2

9
8
7
6
5
4
3
2

MAIN P.C. BOARD

1

(MCC-5020)

BLK

BRW

BRW

INDOOR

TERMINAL

BLOCK

CN22

LINE

FILTER

21

BLK WHI

3 1

CN23

DB01

220-240V ~50Hz

3

RED

CN21

DC5V

DC12V

220V ~60Hz

Heat

exchanger

GRN & YEL

CN34

POWER SUPPLY

121

2

(RED)

CN10
(WHI)

1

1

3

3

4

4

5

5

66

CN07
(WHI)

1

1

2

2

3

3

4

4

CIRCUIT

5

5

RED
WHI
BLK
BLU
BRW
ORN
PUR
YEL
GRY
PNK
GRN&
YEL

Color

Identification

RED

:

WHITE

:

BLACK

:

BLUE

:

BROWN

:

ORANGE

:

PURPUL

:

YELLOW

:

GRAY

:

PINK

:

GREEN&

:

YELLOW

BRW

RED

BLK
WHI
YEL
BLU

WHI
YEL
YEL
YEL
YEL

LOUVER MOTOR

BLU

FAN MOTOR

DC MOTOR

1

1

2

2

3

3

4

4

5

5

Micro SW

– 17 –

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

RAS-B10GKVP-E, RAS-B13GKVP-E, RAS-B16GKVP-E

No.

1

Fan motor (for indoor)

2

Room temp. sensor (TA-sensor)

3

Heat exchanger temp. sensor (TC-sensor)

4

Louver motor

Parts name

6-2. Outdoor Unit

RAS-10GAVP-E, RAS-13GAVP-E, RAS-16GAVP-E

No.

1

Reactor

2

Outside fan motor

3

Suction temp. sensor (TS sensor)

Parts name

(Inverter attached)

Type

MF-280-30-5R

( – )

( – )

MP24Z

Model name

CH-57

ICF-140-43-4R

Specifications

DC280–340V, 30W

10kΩ at 25°C

10kΩ at 25°C

Output (Rated) 1W, 16 poles, DC12V

Rating

L = 10mH, 16A × 2

DC140V, 43W

10kΩ (25°C)

4

Discharge temp. sensor (TD sensor)

5

Outside air temp. sensor (TO sensor)

6

Heat exchanger temp. sensor (TE sensor)

7

Terminal block (6P)

8

Compressor

9

Coil for P.M.V.

10

Coil for 4-way valve

(Inverter attached)

(Inverter attached)

(Inverter attached)

——

DA111A1F-20F1

CAM-MD12TF

VHV

62kΩ (20°C)

10kΩ (25°C)

10kΩ (25°C)

20A, AC250V

3-phases 4-poles 750W

DC12V

AC220–240V

– 18 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-B10GKVP-E/RAS-10GAVP-E

INDOOR UNIT

Indoor heat

exchanger

T1

Temp. measurement

TC

P

Pressure measurement
Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe
Outer dia. : 9.52mm
Thickness : 0.8mm

4-way valve
(STF-0108Z)

TS

Muffler

Muffler

Compressor
DA111A1F-20F1

Outdoor heat

exchanger

Cross flow fan

Deoxidized copper pipe
Outer dia. : 6.35mm
Thickness : 0.8mm

Sectional shape
of heat insulator

TD

TO

TA

Allowable height

difference : 10m

Strainer

Pulse motor
valve at liquid side
(CAM-B22YGTF-3)

Strainer

Max. : 25m
Min. : 2m
Chargeless : 15m
Charge : 20g/m
(16 to 25m)

Allowable pipe length

Temp. measurement

T2

Propeller fan

OUTDOOR UNIT

TE

NOTE :

Refrigerant amount : 0.82kg

Gas leak check position
Refrigerant flow (Cooling)
Refrigerant flow (Heating)

NOTE :

• The maximum pipe length of this air conditioner is 25 m. When the pipe length exceeds 15m, the additional
charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 200g)

– 19 –

RAS-B13GKVP-E/RAS-13GAVP-E, RAS-B16GKVP-E/RAS-16GAVP-E

T1

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

TC

P

Pressure measurement
Gauge attaching port

Vacuum pump connecting port
Deoxidized copper pipe

Outer dia. : 9.52mm(13),

12.7mm(16)
Thickness : 0.8mm

4-way valve
(STF-0108Z)

TS

Muffler

Muffler

Compressor
DA111A1F-20F1

Outdoor heat

exchanger

Cross flow fan

Deoxidized copper pipe
Outer dia. : 6.35mm
Thickness : 0.8mm

Sectional shape
of heat insulator

TD

TO

Split capillary

Ø1.2 x 80

TA

Allowable height

difference : 10m

Strainer

Pulse motor
valve at liquid side
(CAM-B22YGTF-3)

Max. : 25m
Min. : 2m
Chargeless : 15m
Charge: 20g/m
(16 to 25m)

Allowable pipe length

Temp. measurement

T2

Propeller fan

OUTDOOR UNIT

Ø1.2 x 80

TE

NOTE :

Refrigerant amount : 0.96kg

Gas leak check position
Refrigerant flow (Cooling)
Refrigerant flow (Heating)

NOTE :

• The maximum pipe length of this air conditioner is 25 m. When the pipe length exceeds 15m, the additional
charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 200g)

– 20 –

7-2. Operation Data

<Cooling>

Temperature

condition (°C)

Indoor Outdoor

27/19 35/–

<Heating>

Temperature

condition (°C)

Indoor Outdoor

20/– 7/6

Model name

RAS-

B10GKVP-E

B13GKVP-E

B16GKVP-E

Model name

RAS-

B10GKVP-E

B13GKVP-E

B16GKVP-E

Standard
pressure

P (MPa)

0.9 to 1.1

0.8 to 1.0

0.7 to 0.9

Standard
pressure

P (MPa)

2.2 to 2.4

2.5 to 2.7

2.8 to 3.0

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

13 to 15 42 to 44
11 to 14 42 to 45

8 to 11 43 to 47

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

37 to 39 0 to 3
42 to 45 0 to 2
48 to 49 0 to 2

Indoor

fan mode

High
High
High

Indoor

fan mode

High
High
High

Outdoor

fan mode

High
High
High

Outdoor

fan mode

High
High
High

Compressor

revolution

(rps)

37
59
82

Compressor

revolution

(rps)

54
65
86

NOTES :

1. Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent.

(Thermistor themometer)

2. Connecting piping condition : 7.5 m

– 21 –

8. CONTROL BLOCK DIAGRAM

8-1. Indoor Unit

RAS-B10GKVP-E, RAS-B13GKVP-E, RAS-B16GKVP-E

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Converter

(D.C circuit)

Noise Filter

M.C.U.

Functions

• Cold draft preventing Function

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver

Motor

Louver Motor
Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

Air purifier

unit

Micro Switch

From Outdoor Unit

~

220-240V

220V

50Hz

~

60Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)
Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

– 22 –

Air Purifier

SLEEP

RAS-10GAVP-E, RAS-13GAVP-E, RAS-16GAVP-E

8-2. Outdoor Unit (Inverter Assembly)

For INDOOR UNIT

220–240 V ~50Hz

220 V ~60Hz

MICRO-COMPUTER BLOCK DIAGRAM

MCC5009 (P.C.B) OUTDOOR UNIT

Indoor unit

send/receive

circuit

M.C.U

• PWM synthesis function

• Input current release control

Discharge

temp. sensor

• IGBT over-current detect control

• Outdoor fan control

Gate drive

• High power factor correction control

Outdoor air

temp. sensor

– 23 –

Suction temp.

sensor

• Inverter output frequency control

• A/D converter function

• P.M.V. control

• Discharge temp. control

Current

detect

• 4-way valve control

Heat exchanger

temp.sensor

• Signal communication to indoor unit

High Power

factor Correction

circuit

Clock

frequency

4MHz

Gate drive

circuit

circuit

Current

detect

Noise

Filter

Input current

sensor

Driver circuit

of P.M.V.

P.M.V.

Converter

(AC → DC)

Relay
circuit

4-way

valve

Inverter

(DC → AC)

Inverter

(DC → AC)

P.M.V. : Pulse Motor Valve
M.C.U. : Micro Control Unit

Outdoor

Fan motor

Compressor

9. OPERATION DESCRIPTION

9-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air
conditioner, which uses DC motor for the indoor fan
motor and the outdoor fan motor. And the capacity­proportional control compressor which can change the
motor speed in the range from 13 to 115 rps is
mounted. The DC motor drive circuit is mounted to the
indoor unit. The compressor and the inverter to control
fan motor are mounted to the outdoor unit.

The entire air conditioner is mainly controlled by the
indoor unit controller.

The indoor unit controller drives the indoor fan motor
based upon command sent from the remote controller,
and transfers the operation command to the outdoor
unit controller.

The outdoor unit controller receives operation com­mand from the indoor unit side, and controls the
outdoor fan and the pulse motor valve. (P.M.V)
Besides, detecting revolution position of the compres­sor motor, the outdoor unit controller controls speed of
the compressor motor by controlling output voltage of
the inverter and switching timing of the supply power
(current transfer timing) so that motors drive according
to the operation command.
And then, the outdoor unit controller transfers reversely
the operating status information of the outdoor unit to
control the indoor unit controller.

As the compressor adopts four-pole brushless
DC motor, the frequency of the supply power
from inverter to compressor is two-times cycles
of the actual number of revolution.

1. Role of indoor unit controller

The indoor unit controller judges the operation
commands from the remote controller and assumes
the following functions.

• Judgment of suction air temperature of the indoor
heat exchanger by using the indoor temp. sensor.
(TA sensor)

• Judgment of the indoor heat exchanger tempera­ture by using heat exchanger sensor (TC sensor)
(Prevent-freezing control, etc.)

• Louver motor control

• Indoor fan motor operation control

• LED (Light Emitting Diode) display control

• Transferring of operation command signal (Serial

signal) to the outdoor unit

• Reception of information of operation status
(Serial signal including outside temp. data) to the
outdoor unit and judgment/display of error

• Air purifier operation control

2. Role of outdoor unit controller

Receiving the operation command signal (Serial
signal) from the indoor unit controller, the outdoor
unit performs its role.

• Compressor operation control

• Operation control of outdoor fan motor

• P.M.V. control

• 4-way valve control



Operations follow ed to judgment



of serial signal from indoor side.



• Detection of inverter input current and current
release operation

• Over-current detection and prevention operation
to IGBT module (Compressor stop function)

• Compressor and outdoor fan stop function when
serial signal is off (when the serial signal does not
reach the board assembly of outdoor control by
trouble of the signal system)

• Transferring of operation information (Serial
signal) from outdoor unit controller to indoor unit
controller

• Detection of outdoor temperature and operation
revolution control

• Defrost control in heating operation (Temp.
measurement by outdoor heat exchanger and
control for 4-way valve and outdoor fan)

3. Contents of operation command signal
(Serial signal) from indoor unit controller to
outdoor unit controller

The following three types of signals are sent from
the indoor unit controller.

• Operation mode set on the remote controller

• Compressor revolution command signal defined

by indoor temperature and set temperature
(Correction along with variation of room tempera­ture and correction of indoor heat exchanger
temperature are added.)

• Temperature of indoor heat exchanger

• For these signals ([Operation mode] and [Com-

pressor revolution] indoor heat exchanger tem­perature), the outdoor unit controller monitors the
input current to the inverter, and performs the
followed operation within the range that current
does not exceed the allowable value.

4. Contents of operation command signal
(Serial signal) from outdoor unit controller
to indoor unit controller

The following signals are sent from the outdoor unit
controller.

• The current operation mode

• The current compressor revolution

• Outdoor temperature

• Existence of protective circuit operation

For transferring of these signals, the indoor unit
controller monitors the contents of signals, and
judges existence of trouble occurrence.

Contents of judgment are described below.

• Whether distinction of the current operation
status meets to the operation command signal

• Whether protective circuit operates
When no signal is received from the outdoor

unit controller, it is assumed as a trouble.

– 24 –

9-2. Operation Description

9-2. 1. Basic operation ........................................................................................................... 26

1. Operation control ................................................................................................... 26

2. Cooling/Heating operation ..................................................................................... 27

3. AUTO operation ..................................................................................................... 27

4. DRY operation........................................................................................................ 27

2. Indoor fan motor control ............................................................................................. 28

3. Outdoor fan motor control........................................................................................... 30

4. Capacity control.......................................................................................................... 31

5. Current release control ............................................................................................... 31

6. Release protective control by temperature of indoor heat exchanger........................ 32

7. Quick heating control.................................................................................................. 33

8. Defrost control (Only in heating operation) ................................................................ 33

9. Louver control............................................................................................................. 34

1) Louver position....................................................................................................... 34

2) Air direction adjustment ......................................................................................... 34

3) Swing ..................................................................................................................... 34

10. ECO operation............................................................................................................ 35

11. Temporary operation................................................................................................... 36

12. Air purifying control [Detection of abnor mality] .......................................................... 37

13. Discharge temperature control ................................................................................... 37

14. Pulse motor valve (P.M.V.) control .............................................................................. 38

15. Clean operation .......................................................................................................... 39

16. Clean operation release ............................................................................................ 40

17. Select switch on remote controller ............................................................................. 41

9-3. Auto Restart Function.............................................................................................42

9-3-1. How to Set the Auto Restart Function.................................................................... 42

9-3-2. How to Cancel the Auto Restart Function ............................................................. 43

9-3-3. Power Failure During Timer Operation ................................................................... 43

9-4. FILTER Indicator ......................................................................................................43

9-4-1. How to Turn Off FILTER Indicator............................................................................ 43

9-5. Remote Controller and Its Fuctions ......................................................................44

9-5-1. Parts Name of Remote Controller........................................................................... 44

9-5-2. Name and Functions of Indications on Remote Controller ................................. 45

9-6. Hi-PO WER Mode

([Hi-POWER] button on the remote controller is pressed) ..................................46

– 25 –

Item

Operation flow and applicable data, etc.

Description

1. Basic
operation

1. Operation control

Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are
controlled.

1) The operation conditions are selected by the remote controller as shown in the below.

2) A signal is sent by ON button of the remote controller.

3) The signal is received by a sensor of the indoor unit and processed by the indoor controllers as
shown in the below.

4) The indoor controller controls the indoor fan motor and louver motor.

5) The indoor controller sends the operation command to the outdoor controller, and sends/receives
the control status with a serial signal.

6) The outdoor controller controls the operation as shown in the left, and also controls the compres­sor, outdoor fan motor, 4-way valve and pulse motor valve.

Selection of

operation conditions

ON/OFF

Remote controller

Control contents of remote controller

• ON/OFF (Air conditioner/Air purifier)

• Operation select (COOL/HEAT/AUTO/DRY)

• Temperature setup

• Air direction

• Swing

• Air volume select (AUTO/LOW/LOW+/MED/MED+/HIGH)

• ECO

• ON timer setup

• OFF timer setup

• High power

Signal receiving

Indoor unit control

Operation command

Serial signal send/receive

Serial signal send/receive

Outdoor unit control

Indoor unit

Indoor unit control

• Command signal generating function of
indoor unit operation

• Calculation function (temperature calculation)

• Activation compensation function of indoor fan

• Cold draft preventive function

• Timer function

• Indoor heat exchanger release control

Outdoor unit

Outdoor unit control

• Frequency control of inverter output

• Waveform composite function

• Calculation function

(Temperature calculation)

• AD conversion function

• Quick heating function

• Delay function of compressor reactivation

• Current release function

• GTr over-current preventive function

• Defrost operation function

• Indoor fan motor

• Louver motor

~

Inverter

• Compressor

• Outdoor fan motor

• 4-way valve

• Pulse motor valve

(P.M.V.)

– 26 –

Item

Operation flow and applicable data, etc.

Description

1. Basic
operation

2. Cooling/Heating operation

The operations are performed in the following parts by controls according to cooling/heating conditions.

1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal
starts being transferred form the indoor controller to the outdoor unit.

2) At the indoor unit side, the indoor fan is operated according to the contents of “2. Indoor fan
motor control” and the louver according to the contents of “9. Louver control”, respectively.

3) The outdoor unit controls the outdoor fan motor, compressor, pulse motor valve and
4-way valve according to the operation signal sent from the indoor unit.

*1. The power coupler of 4-way valve is usually turned off, and it is turned on dur ing defrost

operation. (Only in heating)

Operation ON

Indoor unit control

Sending of operation command signal

Outdoor unit control

3. AUTO operation

Selection of operation mode
As shown in the following figure, the operation starts by
selecting automatically the status of room temperature
(Ta) when starting AUTO operation.

*1. When reselecting the operation mode, the fan

speed is controlled by the previous operation mode.

Ta

Cooling operation

Ts + 1

Monitoring (Fan)

Ts – 1

Heating operation

Setup of remote controller

Indoor fan motor control / Louver control

Compressor revolution control / Outdoor fan motor control /
4-way valve control In cooling operation: ON

In heating operation: OFF
Pulse motor valve control

[ ]

1) Detects the room temperature (Ta) when
the operation started.

2) Selects an operation mode from Ta in
the left figure.

3) Fan operation continues until an
operation mode is selected.

4) When AUTO operation has started
within 2 hours after heating operation
stopped and if the room temperature is
20°C or more, the fan operation is
performed with ”Super Ultra LOW” mode
for 3 minutes.
Then, select an operation mode.

5) If the status of compressor-OFF
continues for 15 minutes the room
temperature after selecting an operation
mode (COOL/HEAT), reselect an
operation mode.

4. DRY operation

DRY operation is performed according to the difference
between room temperature and the setup temperature as
shown below.

In DRY operation, fan speed is controlled in order to
prevent lowering of the room temperature and to avoid air
flow from blowing directly to persons.

[˚C]

Ta

+

1.0

+

0.5

L– (W5)

(W5+W3) / 2

SL (W3)

Tsc

Fan speed

– 27 –

1) Detects the room temperature (Ta) when
the DRY operation started.

2) Starts operation under conditions in the
left figure according to the temperature
difference between the room tempera­ture and the setup temperature (Tsc).
Setup temperature (Tsc)
= Set temperature on remote controller
(Ts) + (0.0 to 1.0)

3) When the room temperature is lower
1°C or less than the setup temperature,
turn off the compressor.

Item

Operation flow and applicable data, etc.

Description

2. Indoor fan
motor control

COOL ON

Fan speed setup

AUTO

Ta

[˚C]

+2.5

a

+2.0

b

+1.5

c

+1.0

<In cooling operation>

(This operation controls the fan speed at indoor unit side.)
The indoor fan (cross flow fan) is operated by the phase-

control induction motor. The fan rotates in 5 stages in
MANUAL mode, and in 5 stages in AUTO mode, respec­tively. (Table 1)

MANUAL

(Fig. 1)

Indication

L
L+
M
M+
H

Fan speed

W6

(L + M) / 2

W9

(M + H) / 2

WC

(Fig. 2)

Air volume AUTO

M+(WB)

*3
*4
*5

*3 : Fan speed = (M + –L) x 3/4 + L
*4 : Fan speed = (M + –L) x 2/4 + L
*5 : Fan speed = (M + –L) x 1/4 + L

* Symbols

UH : Ultra High
H : High
M+ : Medium+
M : Medium
L+ : Low+
L: Low
L- : Low–
UL : Ultra Low
SUL : Super Ultra Low

* The fan speed broadly varies due

to position of the louver, etc.
The described value indicates one
under condition of inclining
downward blowing.

1) When setting the fan speed to L,
L+, M, M+ or H on the remote
controller, the operation is
performed with the constant
speed shown in Fig. 1.

2) When setting the fan speed to
AUTO on the remote controller,
revolution of the fan motor is
controlled to the fan speed level
shown in Fig. 2 and Table 1
according to the setup tempera­ture, room temperature, and heat
exchanger temperature.

d

+0.5

e

Tsc

Fan speed

level

WF
WE
WD
WC
WB

WA

W9

W8

W7

W6

W5

W4

W3

W2

W1

COOL

UH

H

M+

M

L+

L

L–

UL

SUL

HEAT

UH

H

M+

M

L+

L

L–

UL

SUL

L(W6)

DRY

L+

L

L–

UL

SUL

(Linear approximation
from M+ and L)

(Table 1) Indoor fan air flow rate

RAS-B10GKVP-E

Fan speed Air flow rate

(rpm) (m

1630 684
1480 609
1400 569
1350 544
1200 468
1110 423
980 358
910 323
900 318
890 313
880 308
730 232
580 157
430 82
400 67

3

/h)

Fan speed Air flow rate

RAS-B13GKVP-E

(rpm) (m

1650 694
1530 634
1440 589
1390 564
1240 488
1150 443
1010 373
910 323
900 318
890 313
880 308
730 232
580 157
430 82
400 67

RAS-B16GKVP-E

3

/h)

Fan speed Air flow rate

(rpm) (m

1650 694
1580 659
1550 644
1530 634
1380 559
1230 483
1080 408
970 353
960 348
950 343
940 338
790 263
640 187
490 112
400 67

3

/h)

– 28 –

Item

d

O

ol

y.

c

e

C

[C]

b

5

c

5.5

)

)

)

U

.

)

c

U

g

y

g

ON

l

52

51

(

8

t

Operation flow and applicable data, etc.

Description

2. Indoor fan
motor control

HEAT

Fan speed setup

TC ≥ 42˚C

NO

AUTO

<In heating operation>

MANUAL

Indication Fan speed

L
L+
M
M+
H

YES

Tc

(Fig. 3)

(L + M) / 2

(M + H) / 2

Min air flow rate contro

Limited to Min WD tap

W8

WA

WE

1) When setting the fan speed to L,
L+, M, M+ or H on the remote
controller, the operation is per­formed with the constant speed
shown in Fig. 3 and Table 1.

2) When setting the fan speed to
AUTO on the remote controller,
revolution of the fan motor is
controlled to the fan speed level
shown in Fig. 5 according to the set
temperature and room temperature.

3) Min air flow rate is controlled by
temperature of the indoor heat
exchanger (Tc) as shown in Fig. 4.

4) Cold draft prevention, the fan
speed is controlled by temperature
of the indoor heat exchanger (Tc)
as shown in Fig. 6.

Basic fan contr

A

TS

–0.

d

–1.0

e

–1.5

f

–2.0

g

–2.5
–5.0

*
*

(Fig. 4)

(Fig. 5)

*Fan speed=

TC

Fan spee

AUT

L (W8

*1
*2

*3

M+ (WD)

H (WE

No limi

W8) + W

Cold draft preventive control

T
46 46
45 45 33

33 33 21
32 32 20

*A+4 *A+4 *A+4

*A-4 *A-4 *A-4

* No limitation while fan speed MANUAL mode is in stabilit
* A: When Tsc 24, A is 24, and when Tsc < 24, A is Ts

Tsc: Set valu

34

Fan speed MAN
Fan speed AUTO in stabilit
Fan speed AUTO in startin

H (WE

Line-approximate
H and S

SUL (W2

L with Tc

Stop

AL in startin

(Fig. 6)

[In starting and in stability]

FAN AUTO

F AN Man ual

In starting

• Until 12 minutes passed after operation start

• When 12 to 25 minutes passed after operation
start and room temp. is 3°C or lo w er than set temp.

• Room temp. < Set temp. –4°C

• When 12 to 25 minutes passed after operation start
and room temp. is higher than (set temp. –3°C)

• When 25 minutes or more passed after operation start

• Room temp. ≥ Set temp. –3.5°C

In stability

– 29 –

Item

Operation flow and applicable data, etc.

Description

3. Outdoor fan
motor control

1) Outdoor unit
operation command
(Outdoor fan control)

when the motor stopped.

The blowing air volume at the outdoor unit side is controlled.
Receiving the operation command from the controller of

indoor unit, the controller of outdoor unit controls fan speed.
* For the fan motor, a DC motor with non-stage variable

speed system is used. However, it is limited to 8 stages for
reasons of controlling.

Air conditioner ON

(Remote controller)

Indoor unit controller

2) Fan speed ≥ 400

YES

OFF status of

fan motor continues.

NO

Fan motor ON

1) The operation command sent
from the remote controller is
processed by the indoor unit
controller and transferred to the
controller of the outdoor unit.

2) When strong wind blows at
outdoor side, the operation of air
conditioner continues with the
fan motor stopped.

3) Whether the fan is locked or not
is detected, and the operation of
air conditioner stops and an
alarm is displayed if the fan is
locked.

4) According to each operation
mode, by the conditions of
outdoor temperature (To) and
compressor revolution, the speed
of the outdoor fan shown in the
table is selected.

3) Fan lock
NO

4) Motor operates as shown in the table below.

In cooling operation

Compressor speed (rps)

>

38°C

To

>

28°C

To

>

To To

During

ECO mode

When To is abnormal

Tap

f 1
f 2
f 3
f 4
f 5
f 6
f 7
f 8

15°C

>

5.5°C

To

>

0°C

To

>

To

38°C

To < 38°C

10GAVP-E 13GAVP-E 16GAVP-E

200 200 200
300 300 300
390 390 390
450 450 450
500 500 500
500 500 500
600 600 600
600 600 600

YES

Air conditioner

OFF

~ 13.8 ~ 31.7

MIN MAX MIN MAX MIN MAX

f 2f 3f Cf Df Ef F
f 2 f 3 f B f C f E f F
f 2 f 3 f 8 f 9 f A f B
f 2 f 3 f 6 f 7 f 8 f 9
f 1 f 2 f 4 f 5 f 6 f 7
f 2 f 3f B f Cf Cf D
f 2 f 3 f 2 f 3 f B f C
f Df Ff Df Ff Df F

32.3 ~ MAX

Outdoor fan speed (rpm)

Alarm

display

In Heating operation

Compressor speed (rps)

>

To

To

During

ECO mode

When To is abnormal

Tap

f 9
f A

f B
f C
f D

f E

f F

To < 15°C
To < 5.5°C
To < –5.0°C

>

To
To < 15°C
To < 5.5°C
To < –5.5°C

10GAVP-E 13GAVP-E 16GAVP-E

700 700 700
700 700 700
700 700 700
700 700 700
750 840 920
750 840 920
750 840 920

15°C

15°C

~16.8 ~47.9

f 3 f 8 f 9
f 3 f 9 f A
f 8 f A f D

f B f C f D

f 3 f 3 f 6
f 3 f 3 f 8
f 5 f 9 f 9
f 7 f A f B

f A f B f D

48.5 ~ MAX

– 30 –

Item

Operation flow and applicable data, etc.

Description

4. Capacity
control

The cooling or heating capacity depending on the load is
adjusted.

According to difference between the setup value of tempera­ture and the room temperature, the capacity is adjusted by
the compressor revolution.

Remote controller Indoor unit

Set temp. (Ts)

Ts –Ta

Correction of Hz signal

Detection of electromotive force

of compressor motor winding

Detection of motor speed and rotor position

Correction value of Hz signal ≤ Operating Hz

Inverter output change

Commutation timing change

Room temp. (Ta)

1) The difference between set
temperature on remote controller
(Ts) and room temperature (Ta)
is calculated.

2) According to the temperature
difference, the correction value of
Hz signal which determines the
compressor speed is set up.

3) The rotating position and speed
of the motor are detected by the
electromotive force occurred on
the motor winding with operation
of the compressor.

4) According to the difference
resulted from comparison of the
correction value of Hz signal with
the present operation Hz, the
inverter output and the commuta­tion timing are varied.

5) Change the compressor motor
speed by outputting power to the
compressor.

* The contents of control

operation are same in cooling
operation and heating
operation

5. Current release
control

Outdoor unit inverter main

circuit control current

Operating current ≤

Setup value

Low

Capacity control continues.

Outdoor temp.

45˚C
40˚C44˚C
16˚C39˚C
11˚C 15.5˚C

Change of compressor speed

This function prevents troubles on the electronic parts of the
compressor driving inverter.

This function also controls drive circuit of the compressor
speed so that electric power of the compressor drive circuit
does not exceed the specified value.

Outdoor temp. To

Setup of current release point

High

Cooling current

release value

10.5˚C

Reduce compressor speed

Current decrease

Heating current

release value

6.45A

6.75A

8.47A

7.72A

9.22A

10.80A

1) The input current of the outdoor
unit is detected in the inverter
section of the outdoor unit.

2) According to the detected
outdoor temperature, the
specified value of the current is
selected.

3) Whether the current value
exceeds the specified value or
not is judged.

4) If the current value exceeds the
specified value, this function
reduces the compressor speed
and controls speed up to the
closest one commanded from the
indoor unit within the range
which does not exceed the
specified value.

– 31 –

Item

Operation flow and applicable data, etc.

Description

6. Release protective
control by tempera­ture of indoor heat
exchanger

7˚C

6˚C

5˚C

Indoor heat exchanger temperature

<In cooling/dry operation>

(Prevent-freezing control for indoor heat exchanger)
In cooling/dry operation, the sensor of indoor heat

exchanger detects evaporation temperature and
controls the compressor speed so that temperature of
the heat exchanger does not exceed the specified
value.

Usual cooling capacity control

R

When the value is
in Q zone, the

Q

compressor speed
is kept.

P

Reduction of compressor speed

1) When temperature of the indoor
heat exchanger drops below 5°C,
the compressor speed is
reduced. (P zone)

2) When temperature of the indoor
heat exchanger rises in the
range from 6°C to under 7°C, the
compressor speed is kept.
(Q zone)

3) When temperature of the indoor
heat exchanger rises to 7°C or
higher, the capacity control
operation returns to the usual
control in cooling operation.
(R zone)

55˚C

50˚C

46˚C

Indoor heat exchanger temperature

<In heating operation>

(Prevent-over pressure control for refrigerating cycle)
In heating operation, the sensor of indoor heat ex-

changer detects condensation temperature and controls
the compressor speed so that temperature of the heat
exchanger does not exceed the specified value.

Reduction of compressor speed

P

When the value is

Q

in Q zone, the
compressor speed
is kept.

R

Usual heating capacity control

1) When temperature of the indoor
heat exchanger rises in the
range from 50°C to 55°C, the
compressor speed is kept.
(Q zone)

When temperature of the indoor
heat exchanger drops in the
range from 46°C to under 55°C,
the compressor speed is kept.
(Q zone)

2) When temperature of the indoor
heat exchanger rises to 55°C or
higher, the compressor speed is
reduced. (P zone)

3) When temperature of the indoor
heat exchanger does not rise to
50°C, or when it drops below to
46°C, the capacity control
operation returns to the usual
control in heating operation.
(R zone)

– 32 –

Item

Operation flow and applicable data, etc.

Description

7. Quick heating
control

2 hours passed after the operation had stopped.

20˚C

Indoor temperature

Outdoor heat exchanger

This function quickens the starting of heating opera­tion when indoor/outdoor temperature is low.
(Available only in heating operation)

When indoor temperature is low, this function stores
the heat by heating winding depended on the outdoor
temperature and then it enables the hot air blowing
out quickly.

In case of operation stop

The previous operation was heating and

YES

Winding is not heated.

Heating output for winding

OFF

20W or equivalent

20W or equivalent

temperature

–1˚C
–3˚C

–6˚C
–8˚C

NO

When the following conditions are
satisfied, winding is heated by output
varied by the outdoor heat exchanger
temperature.

Condition 1 :

The previous operation was heating.

Condition 2 :

2 hours passed after operation stop.

Condition 3 :

The room temperature is 20°C or lower.
The indoor temperature sensor detects

the room temperature.
If the detected room temperature is 20°C
or lower, the outdoor heat exchanger
temperature sensor detects the outdoor
heat exchanger temperature. As shown in
the left figure, winding of the compressor
is heated for each division of the tempera-

for each outdoor temperature) and

ture (
the heat is stored.

8. Defrost control
(Only in heating
operation)

Start of heating operation

–5˚C
–7˚C

–20˚C

Outdoor heat exchanger temperature

A zone

B zone

C zone

(This function removes frost adhered to the outdoor
heat exchanger.)

The temperature sensor of the outdoor heat ex­changer (Te sensor) judges the frosting status of the
outdoor heat exchanger and the defrost operation is
performed with 4-way valve reverse defrost system.

0’ 10’ 15’ 27’40” 34’

Operation time
(Minute)

C zone

A zone

B zone

*

* The minimum value of Te sensor 10 to 15 minutes

after start of operation is stored in memory as Te0.

Table 1

When T e0 - TE ≥ 2.5 continued for 2 minutes in A zone,
defrost operation starts.

When the operation continued for 2 minutes in B zone,
defrost operation starts.

When T e0 - TE ≥ 3 continued for 2 minutes in C zone,
defrost operation starts.

The necessity of defrost operation is
detected by the outdoor heat exchanger
temperature. The conditions to detect the
necessity of defrost operation differ in A,
B, or C zone each. (Table 1)

<Defrost operation>

• Defrost operation in A to C zones

1) Stop operation of the compressor for
20 seconds.

2) Invert (ON) 4-way valve 10 seconds
after stop of the compressor.

3) The outdoor fan stops at the same time
when the compressor stops.

4) When temperature of the indoor heat
exchanger becomes 38°C or lower,
stop the indoor fan.

<Finish of defrost operation>

• Returning conditions from defrost

operation to heating operation

1) Temperature of outdoor heat exchanger
rises to +8°C or higher.

2) Temperature of outdoor heat exchanger
is kept at +5°C or higher for 80 seconds.

3) Defrost operation continues for
15 minutes.

<Returning from defrost operation>

1) Stop operation of the compressor for
approx. 50 seconds.

2) Invert (OFF) 4-way valve approx. 40
seconds after stop of the compressor.

3) The outdoor fan starts rotating at the
same time when the compressor starts.

– 33 –

Item

Operation flow and applicable data, etc.

Description

9. Louver control

1) Louver
position

This function controls the air direction of the indoor unit.

• The position is automatically controlled according to the operation mode (COOL/HEAT).

• The set louver position is stored in memor y by the microcomputer, and the louver returns to the

stored position when the next operation is performed. (Cooling/heating memor y position)
The angle of the louver is indicated as the horizontal angle is 0°.
When the louver closes fully, it directs approx. 49° upward.

1) Louver position in cooling operation

Initial setting of “Cooling storage position”
Louver : Directs downward (9˚)

Cooling/AUTO

(COOL)/DRY operation

Cooling memory

Powerful

operation

NO

position

Louver angle

Horizontal
(0˚)

Powerful

Room temp. (Ta) < Set temp. (Tsc) + 3.5 Room temp. (Ta) ≥ Set temp. (Tsc) + 3.5

Initial setting of “Cooling storage position”
Louver : Directs downward (9˚)

YES

Room temp. ≥

Set temp. +3.5

YES

NO

Cooling memory

position

Inclined
blowing

“Inclined blowing”
Louver : Directs downward (14˚)

NO

Room temp. ≥ Set temp. +3.5

YES

2) Louver position in heating operation

Heating operation/

AUTO (HEAT)

Initial setting of “Heating storage position”
Louver : Directs downward (76˚)

Heating operation

ECO

operation

NO

Heating memory

position

2) Air direction adjustment

Horizontal

blowing

Inclined
blowing

Room temp. (Ta) < Set temp. (Tsc) – 3

or 25 minutes after start of operation

“Heating storage position”
Louver : Directs downward (76˚)

YES

Room temp. ≥

Set temp. –3.0

YES

NO

Heating memory

Air direction

Blowing

downward

Inclined
blowing

ECO operation

Room temp. (Ta) ≥ Set temp. (Tsc) – 3

“Cooling storage position”

Louver : Directs downward (9˚)

Horizontal

position

position

Horizontal

blowing

NO

Room temp. ≥ Set temp. –3.0

YES

• The louver position can
be arbitrarily set up by
pressing [FIX] button.

3) Swing

• Swing operation is performed in width 35° with the stop position as
the center.

• If the stop position exceeds either upper or lower limit position,
swing operation is perfor med in width 35° from the limit which the
stop position exceeded.

– 34 –

• Swing

When pressing
[SWING] button during
operation, the louver
starts swinging.

Item

Operation flow and applicable data, etc.

Description

10. ECO
operation

TA

[˚C]
+4.0
+3.5
+3.0
+2.5
+2.0
+1.5
+1.0
+0.5
TSC

–0.5
–1.0

–2.0

When pressing [ECO] button on the remote controller, a quiet
and mild operation is performed by reducing the fan speed and
the compressor speed.

<Cooling operation>

This function operates the air conditioner with the difference
between the set and the room temperature as shown in the
following figure.

The time correction is performed for 8 minutes each.
(However, the first correction is performed 150 seconds after
start of the operation.)

Zone

12
11
10

9
8
7
6
5
4
3
2
1

0

Frequency

DRY max

*12
*11
*10

*9
*8

COOL min

OFF

Fan

L+ (W7)

L (W6)

L– (W5)

UL (W4)

Time correction

+ 1

± 0

–1 zone: min 1

<Cooling operation>

1) The room temperature (Tao) at
the start time of DRY operation is
detected.

2) According to difference between
the room temperature and the
set temperature (Tsc), the
operation starts with the condi­tions shown in the left figure.
Set temp.
(Tsc) = Set temp. on remote
controller (Ts) + (0.0 to 1.0)

3) If the room temperature is down
by 2°C or more, turn off the
compressor.

0

–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–4.0
–5.0
–6.0
–7.0
–8.0

(Room temp. – Set temp.)

–9.0
–10.0
–11.0

* 12 (DRY max - COOL min) /6 x 5 + COOL min
* 11 (DRY max - COOL min) /6 x 4 + COOL min
* 10 (DRY max - COOL min) /6 x 3 + COOL min

* 9 (DRY max - COOL min) /6 x 2 + COOL min
* 8 (DRY max - COOL min) /6 x 1 + COOL min

<Heating operation> <Heating operation>

1) The indoor fan speed is con-

30 minutes

A

B

→ Time Compressor

A

speed

0Hz

A zone

16Hz

trolled within (W7) as maximum
value.

2) Setting the compressor speed to
Max. 52Hz, the temperature zone
in which the operation can be
performed with Max. 16Hz is
gradually widened after 30
minutes passed when starting
ECO operation.

3) The louver position is set
horizontally (Standard cooling
position) when the room tem­perature comes close to the set

C

B

B zone

16 to 52Hz

temperature or when 25 minutes
passed after starting ECO
operation.

C

C zone

52Hz

– 35 –

Item

Operation flow and applicable data, etc.

Description

11. Temporary
operation

Pressing [RESET] button starts the temporary opera­tion of [AUTO] operation. When keeping [RESET]
button pressed for 10 seconds or more, the temporary
[COOL] operation is performed.

Filter lamp ON

NO

Did you press [RESET] button

for 3 seconds or more?

YES

Did you press [RESET] button

for 10 seconds or more?

NO

Switch to [AUTO RESTART] control.

12. Air
purifying
control

This function generates nagative ion while cleaning the air in the room.
If air purifier-ON signal is received while the air conditioner stops, the air purifier starts operation,

and if it is received while the air conditioner operates, the air conditioner and the air purifier start
operation.
The air ion generator operates linked with the air purifying operation.

Present status

Stop
Air purifier only
Air conditioner
Joint use of AC and air purifier

Air purifying operation

AC + Air purifying operation

YES

NO

YES

PURE button Air conditioner

Air purifier AC operation*

Stop (All) AC + Air purifier

AC + Air purifier All stop

AC operation All stop

Louver*1

Cooling position

Follows to AC operation

Press RESET button.

Temporary [AUTO] operation

Temporary [COOL] Operation

Operation button

AUTO, L, L+, M, M+, H
Follows to AC operation

Fan speed *2

1) When pressing [RESET] button, the
temporary [AUTO] operation star ts.

2) When keeping [RESET] button pressed
for 3 seconds or more, Pi, Pi, Pi sound is
heard and [AUTO RESTART] control is
changed.

3) When keeping [RESET] button pressed
for 10 seconds or more, “Pi” sound is
heard and the temporary [COOL]
operation starts.

4) If the filter lamp goes on, press [RESET]
button to go off the filter lamp, and then
press [RESET] button again.

5) To stop the temporar y operation, press
the button again.

* When the previous operation was the

operation of air conditioner + air purifier,
an operation of air conditioner + air purifier
starts by pushing AC button on the remote
controller.
(Operation of air conditioner + air purifier
is stored in memory.)

*1 Swing is available
*2 Fan speed is Fan Auto mode varies in

order, (M + 1) → (L) → (L–) → (SL).

Sending air purifier-ON

1 2

Operation lamp ON

Memory position

of louver/COOL

Fan ON

Air purifier ON

Air purifying operation

*1

*2

1,2

Air conditioner operatesAir conditioner stops

Start of air purifier-ON

Air conditioner +

air purifier operate

Sending air purifier-OFF

3

3 4

4

,

Air purifier operates Air conditioner +

Air purifier operate

Operation lamp OFF Filter-OFF

Fan stop

Air conditioner operates

Air purifier-OFF

Louver close

All stop

– 36 –

Item Operation flow and applicable data, etc. Description

12. Air purifying control [Detection of abnormality]

Purifying operation

YES

Total operation

time 1000H

NO

Purifier power ON

Error input

YES

Purifier power ON

NO

NO

Filter lamp-OFF

1 minute or less

YES

Filter lamp ON

Purifier power OFF

Purifier power OFF

Purifier power ON
after 10 minutes
from the error input.

Filter lamp ON

Purifier power OFF

1 2 3

Purifier power OFF

1) Reset by RESET button.

2) Reset by RESET button or by the stop direction
from the remote controller.

* When the breaker is turned [ON] (In restart time

after power failure) or RESET button is pressed
while the FILTER indicator is turned on, the air
purifier is not turned on until the integrated
operation time of the indoor fan exceeds 1 hour
after operation start (It is nor the air purifier
operation time).
It is the safety measures considering an incom­plete drain when electric dust collector has been
cleaned with water.

continues.

Error input

YES

NO

1. Purpose

The air purifying control function is to

alert the user to trouble in the ionizing or
air purifying operation.

2. Description

Trouble is determined to have occurred

(indicated by the FILTER indicator) in the
following four cases.

1) When a count of 1000H has been
reached on the timer

2) When the panel switch has been set to
OFF by the opening of the air inlet
grile, etc.

3) When an abnormal discharge caused
by a symptom such as the build-up of
dirt has been detected while the air
purifier is ON

4) When the electr ic dust collector has
not been installed correctly

* Trouble case (2) or (3) is deemed to

have occurred when the action
concerned continues for more than
one second.

3. Operation

The sequence that FILTER indicator is

turned on are described in the left
flowchart.

1) When 1000H timer counts up, the
FILTER indicator keeps lighting even if
the operation is stopped by the remote
controller.
The timer is stored in memory of the
microcomputer, and the operation time
is cleared by filter RESET button on
the indoor unit or a power failure.
(FILTER indicator goes off.)

2) A trouble detected within 1 minute
after activation of the air is immedi­ately judged as an error and the
FILTER indicator goes on.

3) In case that 1 minute passed after
activation of the purifier, the purifier is
turned off while the PURE indicator
keeps ON. After 10 minutes passed,
restart the purifier and an error is
judged again.

13. Discharge temperature control

Td value

117°C
112°C
108°C
105°C

98°C

Judges as an error and stops the compressor.
Reduce the compressor speed.
Reduce slowly compressor speed.
Keeps the compressor speed.
If the operation is performed with lower speed than one

commanded by the serial signal, speed is slowly raised
up to the commanded speed.

Operates with speed commanded by the serial signal.

Control operation

1. Purpose

This function detects error on the

refrigerating cycle or error on the com­pressor, and perfor ms protective control.

2. Operation

• Control of the compressor speed

The speed control is performed as
described in the left table based upon
the discharge temperature.

– 37 –

Item

Operation flow and applicable data, etc.

Description

14. Pulse motor
valve (P.M.V.)
control

SH control

This function controls throttle amount of the
refrigerant in the refrigerating cycle.

According to operating status of the air conditioner,
this function also controls the open degree of valve
with an expansion valve with pulse motor.

Starting up

Initialize

Move to

initial position

Compressor ON

Td

release control

1) When starting the operation, move the
valve once until it fits to the stopper.
(Initialize)

* In this time, “Click” sound may be

heard.

2) Adjust the open degree of valve by super
heat amount. (SH control)

3) If the discharge temperature was exces­sively up, adjust the open degree of valve
so that it is in the range of set tempera­ture.
(Discharge temp. control)

4) When defrost operation is performed, the
open degree of valve is adjusted accord­ing to each setup conditions during
preparation for defrost and during defrost
operation (4-way valve is inversed.).

5) To turn off the compressor while the air
conditioner stops by control of the
thermostat or by remote controller, adjust
the open degree of valve to the setup
value before stop of the compressor.

PMV open degree control

Stop by

remote controller

Room temp. sensor

(Ta sensor) control

Power OFF

* SH (Super Heat amount) =

Ts (Temperature of suction pipe of the compressor) –
Tc or Te (Heat exchanger temperature at evaporation side)

* PMV: Pulse Motor Valve

Defrost

– 38 –

Item

Operation flow and applicable data, etc.

Description

15. Clean operation

Unit now performing cooling or dry operation

Only S.CLEAN indicator lights, and clean operation starts

Press “STOP” button

Time set now elapses

Operation stops

• Dur ing clean operations: The louver opens
slightly. The indoor fan operates continuously at
a speed of 260 rpm.

Clean operation times

1. Purpose

The clean operation is to minimize the

growth of mold, bacteria etc. by running
the fan and drying so as to keep the
inside of the air conditioner clean.

Clean operation

When the cooling or dry operation shuts

down, the unit automatically starts the
clean operation which is then performed
for the specified period based on duration
of the operation which was performed
prior to the shutdown, after which the
clean operation stops.
(The clean operation is not performed
after a heating operation.)

2. Operation

1) When the stop signal from the remote
controller is received, the S.CLEAN
indicator (green) on the main body
lights, and the clean operation starts.
(Neither the OPERATION indicator nor
the TIMER indicator light.)

2) The period of the clean operation is
determined by the duration of the
operation performed prior to the
reception of the stop code.

3) After the clean operation has been
performed for the specified period, the
unit stops operating.

Operation mode

Cooling: Auto (cooling) Dry

Heating: Auto (heating)
Auto (fan only)
Shutdown

Operation time Clean operation time

Up to 10 minutes
From 10 minutes up

to 1 hour
1 hour or longer 4 hours

No clean operation performed

No clean operation
performed (0 minutes)

2 hours

• To stop an ongoing clean operation at any time
Press the start/stop button on the remote controller twice during the clean
operation. (After pressing the button for the first time, press it for the
second time without delay (within 10 minutes).)

– 39 –

Item

Operation flow and applicable data, etc.

Description

16. Clean operation
release

Setting the clean operation release

Add J04 of the indoor P.C. board assembly.
* This cancels the auto restart function.

Hold down the auto operation switch on the indoor unit
for at least 3 seconds but not more than 10 seconds.

The indoor unit’s buzzer emits three beeps, and
the OPERATION indicator flashes at 5 Hz intervals.

This completes the clean operation release setting.

Setting the clean operation

Cut J04 of the indoor P.C. board
* This step may be skipped if the auto restart function
is not required.

* J04 will be near the MCU so take

steps to ensure that it will not be
exposed to excessive levels of
heat.

Also take care to avoid solder
bridging with the surrounding
components.

Hold down the auto operation switch on the indoor unit
for at least 3 seconds but not more than 10 seconds.

The indoor unit’s buzzer emits three beeps, and
the OPERATION indicator flashes at 5 Hz intervals.

This completes the clean operation setting.

Indoor P.C. board

J04

– 40 –

Item

Operation flow and applicable data, etc.

Description

17. Select switch on
remote controller

Press the operation button

on the remote controller.

Both indoor units

start operation.

NO

Unnecessary set

[Remote controller select]

HiPOWER

SWING

CLR

CLOCK

RESET

ECO

FIX

ON

CHECK

YES

MEMO

1.3.5.9H

FAN

SLEEP

SET

OFF

Cutting direction

Select “B” as the setting for
one of the two indoor units and
for the remote controller.
(See below for details.)

Setting the remote controller

Switching between A and B is enabled by cutting the jumper wire
inside the battery box using pliers.

1) Slide open the remote controller cover and remove the
batteries.

2) Cut the jumper wire inside the batter y compartment using

Jumper wire

nippers.

• The jumper wire should not remain in contact after being cut.

Also, be careful not to let plastic scraps, jumper wire cuttings
or other debris enter the inside of the remote controller.

3) Insert the batteries. “B” appears in the remote controller
display.

* Even after the jumper wire has been cut, switching between

A and B is still possible by pressing the CHECK button and
FIX button together.
The A or B setting, which was switched by pressing the
CHECK button and FIX button together, is restored to the
setting established prior to the switching when the battery is
replaced or the RESET button is pressed.

Setting the selector switch on the main unit

• Remove the front panel, and then set the selector switch to “B”.

• After making the switch setting, remount the front panel.

1. Purpose

This operation is to operate only one

indoor unit using one remote controller.

2. Description

When operating one indoor unit in a

situation where two indoor units have
been installed in the same room or
nearby rooms, this operation prevents the
remote controller signal from being
received simultaneously by both units,
thus preventing both units from operating.

3. Operation

The indoor unit on which the remote

controller selection has been set to B
receives the signal of the remote control­ler also set to B.
(At the factory the remote controller
selection is set to A on all the indoor
units. There is no A setting display.)

When switching between
settings “A” and “B”, always
switch the indoor unit board and
the remote controller as a pair.
(Otherwise, the indoor unit will
not accept the remote
controller’s signals.)

Position of remote controller selector switch

Selector switch

– 41 –

9-3. Auto Restart Function

This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with
the set operating conditions in the ev ent of a power supply being accidentally shut down.
The operation will resume without warning three minutes after power is restored.

This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work.

9-3-1. How to Set the Auto Restar t Function

To set the auto restart function, proceed as follows:
The power supply to the unit must be on ; the function will not set if the power is off.
Press the [RESET] button located in the center of the front panel continuously f or three seconds.
The unit receives the signal and beeps three times.
The unit then restarts operating automatically in the event of power supply being accidentally shut down.

• When the unit is standby (Not operating)

Operation

Press [RESET] button for more than
three seconds. (Less than 10 seconds)

• When the unit is in operation

Operation

Press [RESET] button for more than
three seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

The unit starts to operate. The green indicator is on.

↓ After approx. three seconds,

The unit beeps three times The green indicator flashes
and continues to operate. for 5 seconds.

If the unit is not required to operate at this time, press [RESET]
button once more or use the remote controller to turn it off.

Motions

The unit is in operation. The green indicator is on.

↓

The unit stops operating. The green indicator is turned off.

↓ After approx. three seconds,

The unit beeps three times. The green indicator flashes

for 5 seconds.

If the unit is required to operate at this time, press [RESET] button
once more or use the remote controller to turn it on.

• When the unit is turned on by this function, the louver will not swing even though it was s winging automatically
before shutting down.

• While the filter check indicator is on, the RESET button has the function of filter reset button.

– 42 –

9-3-2. How to Cancel the Auto Restart Function

To cancel auto restart function, proceed as follows :
Repeat the setting procedure : the unit receives the signal and beeps three times.
The unit will be required to be turned on with the remote controller after the main power supply is turned off.

• When the system is on stand-by (not operating)

Operation

Press [RESET] button for more than
three seconds. (Less than 10 seconds)

• When the system is operating

Operation

Press [RESET] button for more than
three seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

The unit starts to operate. The green indicator is on.

↓ After approx. three seconds,
The unit beeps three times and continues to operate.
If the unit is not required to operate at this time, press [RESET]

button once more or use the remote controller to turn it off.

Motions

The unit is in operation. The green indicator is on.

↓

The unit stops operating. The green indicator is turned off.

↓ After approx. three seconds,
The unit beeps three times.
If the unit is required to operate at this time, press [RESET] button

once more or use the remote controller to turn it on.

9-3-3. Power Failure During Timer Operation

When the unit is turned off because of power failure
during timer operation, the timer operation is can­celled. In that case, set the timer operation again.

NOTE :

The Everyday Timer is reset while a command signal
can be received from the remote controller even if it
stopped due to a power failure .

9-4. FILTER Indicator

When the elapsed time reaches 1000 hours after air
purifier operation, the FILTER indicator lights.

After cleaning the filters, turn off the FILTER indicator.

9-4-1. How to Turn Off FILTER Indicator

Press [RESET] button on the indoor unit.

NOTE :

If [RESET] button is pushed while the FILTER indica­tor is not lit, the indoor unit will start the automatic
operation.

When you want a temporary operation while the
FILTER lamp lights, press [RESET] button to turn off
the FILTER lamp. (See page 36)

– 43 –

9-5. Remote Controller and Its Fuctions

P

9-5-1. Parts Name of Remote Controller

1

Infrared signal emitter

Transmits signal to the indoor unit.

2

button

Press the button to start operation.
(A receiving beep is heard.)

Press the button again to stop operation.
(A receiving beep is heard.)

If no receiving sound is heard from the indoor unit,
press the button twice.

3

Mode select button (MODE)

Press this button to select a mode.
Each time you press the button, the modes cycle in

order from A : Auto changeover control,

: Cool, : Dry, : Heat and back to A.

(A receiving beep is heard.)

4

Temperature button (

..The temperature setting is increased to 30°C.
..The temperature setting is reduced to 17°C.

(A receiving beep is heard.)

5

Fan speed button (FAN)

Press this button to select the fan speed.
When you select AUTO, the fan speed is automati­cally adjusted according to the room temperature.

You can also manually select the desired fan speed
from five available settings.
(LOW , LOW+ , MED , MED+ ,
HIGH ) (A receiving beep is heard.)

6

Auto louver button (SWING)

Press this button to swing the louver.
(A receiving beep is heard.)

Press this button again to stop the louver from
swinging. (A receiving beep is heard.)

7

Set louver button (FIX)

Press this button again to adjust the air flow
direction. (A receiving beep is heard.)

TEM

)

11

Cancel button (CLR)

Press this button to cancel the ON timer and OFF
timer. (A receiving beep is heard.)

12

High power button (Hi POWER)

Press this button to start high power operation.

13

Memory button (MEMO)

Press this button to ready for storing the settings.
Hold down the button for more than 3 seconds to
store the setting indicated on the remote controller
and until the

14

Automatic operation button (AUTO)

Press this button to operate the air conditioner
automatically. (A receiving beep is heard.)

15

Economy button (ECO)

Press this button to operate the air conditioner
economically.

16

PRESET button

Press this button to operate the air conditioner to
the settings stored using the MEMO button.

17

PURE button (PURE)

Press this button to start the electrical air purifying
operation.

Press the button again to stop operation.

18

Sleep time button (SLEEP)

Press this button to start the sleep timer (OFF
timer) operation.

You can select the OFF timer time from among four
settings (1, 3, 5 or 9 hours).

mark is displayed.

1

8

ON timer button (ON)

Use this button to change the clock and ON timer
times.

To move up the time, press
button.

To move down the time, press
button.

9

OFF timer button (OFF)

Use this button to change the OFF timer times.
To move up the time, press

button.
To move down the time, press

button.

10

Reserve button (SET)

Press this button to store the time settings.
(A receiving beep is heard.)

of the “ON ON”

of the “ON ON”

of the “OFF

of the “OFF

4

TEMP

ECO

FAN

OFF

AUTO

PRESET

MEMO

1.3.5.9H

SLEEP

SET

14

16

15

5

13

18

10

9

17

3

OFF

”

OFF

”

2

7

12

6

11

8

PURE

MODE

HiPOWER

SWING

CLR

CLOCK
RESET

FIX

ON

CHECK

– 44 –

AUTO

9-5-2. Name and Functions of Indications on Remote Controller

[Display]

All indications, except for the clock time indicator, are displayed by pressing the button.

1

Transmission mark

This transmission mark
remote controller transmits signals to the indoor
unit.

2

Mode indicator

Indicates the current operation mode.
(AUTO : Automatic control, A : Auto changeover
control,

3

T emperature indicator

Indicates the temperature setting.
(17°C to 30°C)

4

PURE indicator

Shows that the electrical air purifying operation is
in progress.

5

FAN speed indicator

Indicates the selected fan speed.
AUTO or five fan speed levels

(

LOW , LOW+ , MED , MED+ ,
HIGH ) can be shown.
Indicates AUTO when the operating mode is

either AUTO or

: Cool, : Dry, : Heat)

: Dry.

indicates when the

6

TIMER and clock time indicator

The time setting for timer operation or the clock
time is indicated.

The current time is always indicated except
during TIMER operation.

7

Hi-POWER indicator

Indicates when the Hi-POWER operation starts.
Press the Hi-POWER button to start and press it

again to stop the operation.

8

(MEMORY) indicator

Flashes for 3 seconds when the MEMO button is
pressed during operation.

The
button for more than 3 seconds while the mark is
flashing.

Press another button to turn off the mark.

9

ECO indicator

Indicates when the ECO is in activated.
Press the ECO button to start and press it again

to stop operation.

10

A, B change indicator remote controller

When the remote controller switching function is
set, “B” appears in the remote controller display.
(When the remote controller setting is “A”, there is
no indication at this position.)

mark is shown when holding down the

1

3

95

4

AUTO

76

2

10

8

• In the illustration, all indications are shown for
purposes of explanation.

During operation, only the relevant indicators are
shown on the remote controller.

– 45 –

9-6. Hi-PO WER Mode

([Hi-POWER] button on the remote controller is pressed)

When [Hi-POWER] button is pressed while the indoor unit is in Auto, Cooling or Heating operation, Hi-POWER
mark is indicated on the display of the remote controller and the unit operates as follows.

1. Automatic operation

• The indoor unit operates in according to the current operation.

2. Cooling operation

• The preset temperature drops 1°C.
(The value of the preset temperature on the remote controller does not change.)

• If the diff erence betw een the preset temperature and the room temperature is big, the horizontal louver
moves to the Hi-POWER position automatically.
Then when the difference between them gets smaller, the horizontal louver returns automatically.

3. Heating operation

• The preset temperature increases 2°C.
(The value of the preset temperature on the remote controller does not change.)

4. The Hi-POWER mode can not be set in Dr y operation

– 46 –

10-1. Safety Cautions

140 mm or more

10. INSTALLATION PROCEDURE

Hook

47 mm or more

1 Installation plate

Hook

74 mm
or more

Hook

For the rear left and left piping

Wall

Insert the cushion between
the indoor unit and wall, and
tilt the indoor unit for better
installation work.

5 Zeolite-plus filter

Air filters

2 Wireless
remote controller

100 mm or more
from wall

4 Remote controller holder
(Mounting holes on both
left and right sides)

8 Remote controller
holder mounting screw

When installing the outdoor unit,
leave open in at least two of
directions (A), (B), (C) and (D)
shown in the right figure.

80 mm or more only
when unobstructed to
the front and both sides

In principle,
leave open

(C)

200 mm
or more

(B)

Ensure sufficient space
to allow drainage

6 Plasma pure filter

50 mm or more
from wall

(D)

7 Mounting screw

Z Shield pipe
(for extension
drain hose)

Y

(A)

250 mm or more
from wall

Extension drain hose
(Option: RB-821SW)

Do not allow the drain hose
to become slack.

Cut the piping
hole slightly
sloped

Make sure the drain hose is
sloped downward.

The auxiliary piping can be
connected at the left, rear left,
rear right, right, bottom right or
bottom left as shown below.

Right

Rear
right

As shown in the figure, position power cord and
connecting cable downward, and lead out along
piping connection port.

Bottom left

Bottom right

Rear left

Insulate the refrigerant pipes
separately, not together.

Power cord

6 mm thick heat resisting
polyethylene foam

Left

Before installing the wireless remote controller

• With the remote controller cover
removed, correctly load the
supplied batteries while
observing their polarity.

2 Wireless remote controller

Cover

3 Batteries

– 47 –

10-2. Optional Parts, Accessories and Tools

10-2-1. Optional Installation Parts

Part Code

Y

Z

Indoor unit name Liquid side (Outer diameter) Gas side (Outer diameter)

RAS-B10GKVP-E, B13GKVP-E 6.35 mm 9.52 mm

RAS-B16GKVP-E 6.35 mm 12.7 mm

Shield pipe (for extension drain hose) (polyethylene foam, 6 mm thick)

Parts name

Refrigerant piping

Attachment bolt arrangement of outdoor unit

• Secure the outdoor unit with the attachment bolts and
nuts if the unit is likely to be exposed to a strong wind.

• Use Ø8 mm or Ø10 mm anchor bolts and nuts.
If it is necessary to drain the defrost water, attach drain

nipple to the base plate of the outdoor unit before
installing it.

Elongated
drain hole

(

)



Suction side

Diffuser

Drain hole

(

)



Q’ty

1 ea.

1

10-2-2. Accessory and Installation Parts

Part No.







Part name (Q’ty)

Installation plate × 1

Wireless remote control × 1

Battery × 2

Part No.







Part name (Q’ty)

Zeolite-plus filter × 1

Plasma pure filter × 1

Mounting screw Ø4 × 25L × 6

Part No.





Parts marked with asterisk (*) are
packaged with the outdoor unit.

Part name (Q’ty)

Drain nipple* × 1

(RAS-10GAVP-E,

13GAVP-E, 16GAVP-E)

Water-proof rubber cap* × 2

(RAS-10GAVP-E,

13GAVP-E, 16GAVP-E)

<Others>

Name



Remote control holder × 1

This model is not equipped with an extension drain hose.



holder mounting screw

– 48 –

Remote control
Ø3.1 × 16L × 2

Owner’s manual

Installation manual

Important information and warning*

B/W strips*

(Energy efficiency labels)

10-2-3. Installation/Servicing Tools

Changes in the product and components

In the case of an air conditioner using R410A, in order to prev ent any other refrigerant from being charged
accidentally, the service port diameter of the outdoor unit control valve (3 wa y valve) has been changed.
(1/2 UNF 20 threads per inch)

• In order to increase the pressure resisting strength of the refrigerant piping flare processing diameter and size
of opposite side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

New tools for R410A

New tools for R410A

Gauge manifold

Charge hose

Electronic balance
for refrigerant charging

Torque wrench
(nominal diam. 1/2, 5/8)

Flare tool (clutch type)

Gauge for projection
adjustment

Vacuum pump adapter

Applicable to R22 model

×
×

¡

×

¡

——

¡

Changes

As pressure is high, it is impossible to measure by means of
conventional gauge. In order to prevent any other refrigerant from
being charged, each port diameter has been changed.

In order to increase pressure resisting strength, hose materials
and port size have been changed (to 1/2 UNF 20 threads per inch).
When purchasing a charge hose, be sure to confirm the port size.

As pressure is high and gasification speed is fast, it is difficult to
read the indicated value by means of charging cylinder, as air
bubbles occur.

The size of opposite sides of flare nuts have been increased.
Incidentally,
a common wrench is used for nominal diameters 1/4 and 3/8.

By increasing the clamp bar’s receiving hole, strength of spring in
the tool has been improved.

Used when flare is made by using conventional flare tool.

Connected to conventional vacuum pump. It is necessary to use
an adapter to prevent vacuum pump oil from flowing back to the
charge hose. The charge hose connecting part has two ports-one
for conventional refrigerant (7/16 UNF 20 threads per inch) and
one for R410A. If the vacuum pump oil (mineral) mixes with R410A
a sludge may occur and damage the equipment.

Gas leakage detector

• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the
U. S’s ARI specified rose color (ARI color code: PMS 507).

• Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to
the charge hose’s port size.

×

Exclusive for HFC refrigerant.

– 49 –

10-3. Indoor Unit

10-3-1. Installation Place

• A place which provides enough spaces around the
indoor unit as shown in the diagram.

• A place where there are no obstacle near the air
inlet and outlet.

• A place which allows easy installation of the piping
to the outdoor unit.

• A place which allows the front panel to be opened.

• The indoor unit shall be installed so that the top of

the indoor unit is positioned at least 2m in height.

• Also , avoid putting anything on the top of the
indoor unit.

10-3-2. Drilling a Hole and Mounting Instal-

lation Plate

Drilling a hole

When install the refrigerant pipes from the rear.

The center of the
pipe hole

Pipe
hole

65 mm

CAUTION

• Direct sunlight on the indoor unit wireless

receiver should be avoided.

• The microprocessor in the indoor unit should

not be too close to r-f sources.
(For details, see the owner's manual.)

Remote controller

• Should be placed where there are no obstacles,
such as curtains, that may block the signal.

• Do not install the remote controller in a place

exposed to direct sunlight or close to a heating
source, such as a stove.

• Keep the remote controller at least 1 m away from

the nearest TV set or stereo equipment.
(This is necessary to prevent image disturbances or
noise interference.)

• The location of the remote controller should be

determined as shown below.

42 mm

Fig. 10-3-2

1. After determining the pipe hole position on the
installation plate ( ð ) drill the pipe hole (Ø65
mm) at a slight downward slant to the outdoor
side.

NOTE :

• When drilling into a wall that contains a metal lath,

wire lath or metal plate, be sure to use a pipe hole
brim ring sold separately.

Mounting the installation plate

Anchor bolt holes

(Side view)

Indoor unit

Reception
range

(Top vi ew)

Indoor unit

Remote
controller

*: Axial distance

Fig. 10-3-1

Reception
range

Remote controller

91 mm

Pipe hole

Indoor unit

7 Mounting screw

Fig. 10-3-3

25 mm

Pipe hole

1 Installation plate

– 50 –

When the installation plate is directly
mounted on the wall

1. Securely fit the installation plate onto the wall by
screws with the upper and lower catches, that
hold the indoor unit, facing out.

2. To mount the installation plate on a concrete wall
use anchor bolts. Drill the anchor bolt holes as
illustrated in the above figure.

3. Install the installation plate horizontally and level.

CAUTION

When installing the installation plate with mount­ing screw, do not use the anchor bolt hole.
Otherwise the unit may fall down and result in
personal injury and property damage.

Anchor bolt

Projection
15mm or less

10-3-3. Electrical Work

1. The supply voltage must be the same as the
rated voltage of the air conditioner.

2. Prepare a power source for the exclusive use of
the air conditioner.

NOTE :

• Wire type :

More than H07RN-F or 245IEC66 (1.0mm²)

CAUTION

• This appliance can be connected to a main
circuit breaker in either of the following two
ways.

1. Connection to fixed wiring:

A switch or circuit breaker which discon­nects all poles and has a contact separa­tion of at least 3 mm must be incorporated
in the fixed wiring. An approved circuit
breaker or switch must be used.

2. Connection with power supply plug:

Attach power supply plug with power cord
and plug it into wall outlet. An approved
power supply cord and plug must be used.

Fig. 10-3-4

5 mm dia. hole

7 Mounting screw
Ø4 × 25L

Clip anchor
(local parts)

Fig. 10-3-5

CAUTION

Failure to securely install the unit may result in
personal injury and/or property damage if the
unit falls.

• In case of block, brick, concrete or similar type
walls, drill 5 mm dia. holes in the wall.

• Insert clip anchors for the  mounting screws.

NOTE :

• Install the installation plate using mounting screws
between 4 to 6, being sure to secure all four
corners.

NOTE :

• Perform wiring work being sure the wire length is
long enough.

10-3-4. Wiring Connection

How to connect the connecting cable

Wiring the connecting cable can be carried
out without removing the front panel.

1. Remove the air inlet grille. Open the air inlet g rille

upward and pull it toward y ou.

2. Remove the terminal cover and cord clamp.

3. Insert the connecting cable (or as according to

local regulations/codes) into the pipe hole on the
wall.

4. Pull the connecting cable through the cable slot

on the rear panel so that it protrudes about
15 cm out of the front.

5. Insert the connecting cable fully into the terminal

block and secure it tightly with scre ws.

6. Tightening torque: 1.2 N•m (0.12 kgf•m)

7. Secure the connecting cable with the cord clamp.

8. Attach the terminal cover, rear plate bushing and

air inlet grille on the indoor unit.

– 51 –

CAUTION

10-3-5. Piping and Drain Hose Installation

• Be sure to refer to the wiring system diagr am
labeled inside the front panel.

• Check local electrical regulations f or any
specific wiring instructions or limitations.

Terminal cover

Screw

Terminal block

Earth wire

Connecting cable

Screw

Cord clamp

Fig. 10-3-6

Terminal block

Piping and drain hose forming

• Since condensation results in machine trouble,
make sure to insulate both the connecting pipes
separately.
(Use polyethylene foam as insulating material.)

Rear right

Rear left

Bottom left

Changing

Left

drain hose

Bottom right

Die-cutting

Right

Front panel slit

Fig. 10-3-10

1. Die-cutting front panel slit

Cut out the slit on the left or right side of the front
panel for the left or right connection and the slit
on the bottom left or side of thefront panel for the
bottom left or right connection with a pair of
nippers.

Piping preparation

Connecting cable

About 15 cm

10 mm

10 mm

Fig. 10-3-7

Fig. 10-3-8

70 mm

50 mm

Earth line

2. Changing drain hose

For left connection, left-bottom connection and
rear-left connection’s piping, it is necessary to
relocate the drain hose and drain cap.

How to remove the drain cap

Clip drain cap with needle-nose pliers, and pull out.

Fig. 10-3-11

How to remove the drain hose

The drain hose is secured in place by a screw.
Remove the screw securing the drain hose, then pull

out the drain hose.

Fig. 10-3-9

NOTE :

WIRE TYPE : more than H07 RN-F or 245 IEC 66.
(1.0mm²)

– 52 –

Screw

Drain hose

Fig. 10-3-12

How to attach the drain cap

In case of bottom right or bottom left piping

1. Insert hexagonal wrench (4 mm).

4 mm

Fig. 10-3-13

2. Firmly insert drain cap.

No gap

Do not apply lubricating oil
(refrigerant machine oil)
when inserting the drain cap.
If applied, deterioration and

Insert a hexagon
wrench (Ø4mm)

drain leakage of the drain
plug may occur.

• After making slits on the front panel with a knife or
similar tool, cut them out with a pair of nippers or
an equivalent tool.

Slit

Fig. 10-3-16

Left-hand connection with piping

Bend the connecting pipes so that they are posi­tioned within 43 mm above the wall surface.

If the connecting pipes are positioned more than
43 mm above the wall surface, the indoor unit may
be unstable.

When bending the connecting pipe, make sure to
use a spring bender to avoid crushing the pipe.

Refer to the table below for the bending
radius of each connection pipe.

Fig. 10-3-14

How to attach the drain hose

Always use the original scre w that secured the
drain hose to the unit. If using a different screw
may cause water to leak.

Insert the drain hose firmly until the connector
contacts with the insulation, then secure it in place
using the original screw.

CAUTION

Securely insert the drain hose and drain cap;
otherwise, water may leak.

In case of right or left piping

• After making slits on the front panel with a knife or
similar tool, cut them out with a pair of nippers or
an equivalent tool.

Outer diameter

6.35 mm

9.52 mm

12.7 mm

Bending radius

30 mm
40 mm
50 mm

To connect the pipe after installation of the
unit (figure)

(To the front flare)

220 mm
170 mm

Liquid side

R30 or less (Ø6.35), R40 or less (Ø9. 52), R50 or less (Ø12. 7)
Use polishing (polyethylene core or the like for bending pipe).

43 mm

Gas side

Outward form of indoor unit

Use a screwdriver handle, etc.

Slit

Fig. 10-3-15

Fig. 10-3-17

NOTE :

If the pipe is incorrectly bent, the indoor unit may be
unstable on the wall.

After passing the connecting pipe through the pipe
hole, connect the connecting pipe to the auxiliary
pipes and wrap the facing tape around them.

– 53 –

CAUTION

50 mm
or more

Do not rise the drain hose.

Do not form the drain hose
into the waved shape.

Do not put the
drain hose end
into water.

Do not put the drain
hose end in the
drainage ditch.

• Bind the auxiliary pipes (two) and connecting

cable with facing tape tightly.
In case of leftward piping and rear-leftward

piping, bind the auxiliary pipes (two) only with
facing tape.

Indoor unit

Auxiliary pipes

Installation
plate

Fig. 10-3-18

• Carefully arrange the pipes so that none of the

pipes stick out of the rear plate of the indoor unit.

• Carefully connect the auxiliary pipes and

connecting pipes to each other and cut off the
insulating tape wound on the connecting pipe
to avoid doub le-taping at the joint, moreo ver,
seal the joint with the vinyl tape, etc.

• Since condensation can result in machine

performance trouble, be sure to insulate both
connecting pipes. (Use polyethylene foam as
insulating material.)

• When bending a pipe, be careful not to crush it.

Connecting
cable

10-3-7. Drainage

1. Run the drain hose at a downward sloped angle.

NOTE :

• Hole should be made at a slight downward slant
on the outdoor side.

Fig. 10-3-21

2. Put water in the drain pan and make sure that the

water is being drained outside.

3. When connecting extension drain hose, insulate

the connection part of extension drain hose with
shield pipe.

Shield pipe

10-3-6. Indoor Unit Installation

1. Pass the pipe through the hole in the wall, and
hook the indoor unit on the installation plate at
the upper hooks.

2. Swing the indoor unit to right and left to confirm
that it is firmly hooked on the installation plate.

3. While pressing the indoor unit onto the wall, hook
it at the lower part on the installation plate.
Pull the indoor unit toward you to confirm that it is
firmly hooked on the installation plate.

1

2

Hook

• F or detaching the indoor unit from the installation

plate pull the indoor unit toward you while pushing
the bottom up at the specified places.

Hook here
1

Installation
plate

Fig. 10-3-19

Push (unhook)

Drain hose

Inside the room

Extension drain hose

Fig. 10-3-22

CAUTION

Install the drain pipe for proper drainage.
Improper drainage can result in water dripping

inside the room.

This air conditioner has been designed to drain
water collected from condensation which forms on
the back of the indoor unit, to the drain pan.

Therefore, do not locate the po w er cord and other
parts at a high place than the drain guide.

Wall

Drain
guide

Push

Push

Fig. 10-3-20

– 54 –

Space for
pipes

Fig. 10-3-23

10-4. Outdoor Unit

10-4-1. Installation Place

• A place which provides enough space around the

outdoor unit as shown in the diagram.

• A place which can bear the weight of the outdoor

unit and does not allow an increase in noise level
and vibration.

• A place where the operation noise and discharged

air do not disturb neighbors.

• A place which is not exposed to a strong wind.

• A place free of combustible gases.

• A place which does not block a passageway.

• When the outdoor unit is to be installed in an

elev ated position, be sure to secure its feet.

• This air conditioner accepts a connection piping

length of up to 25 m.

• There is no need to add refrigerant as long as
the length of the connection piping is 15 m or
less.

• You will need to add 20 g of refrigerant per meter
of added connection piping for installations
requiring connection piping to be between 16 m
to 25 m.

• An allowable height level is up to 10 m.

• A place where the drain water does not cause an y

problems.

Precautions for adding refrigerant

• Use a scale having a precision with at least 10 g
per index line when adding the refrigerant.

Do not use a bathroom scale or similar instrument.

• Use liquid refrigerant when refilling the refrigerant.
Since the refrigerant is in liquid form, it can fill
quickly.

Therefore, perf orm the filling operation carefully
and insert the refrigerant gradually.

CAUTION

1 . Install the outdoor unit without anything

blocking the discharging air.

2. When the outdoor unit is installed in a place

always exposed to strong winds like on the
coast or on a high story of a building, secure
the normal fan operation using a duct or a
wind shield.

3. Especially in windy areas, install the unit to

prev ent the admission of wind.

4. Installation in the following places may result

in trouble.
Do not install the unit in such places.

• A place full of machine oil.

• A saline-place such as the coast.

• A place full of sulfide gas.

• A place where high-frequency wa ves are

likely to be generated, such as from audio
equipment, welders, and medical equip­ment.

Strong
wind

Fig. 10-4-1

– 55 –

10-4-2. Draining the Water

• Holes are provided on the base plate of the
outdoor unit to ensure that the defrost water
produced during heating operations is drained off
efficiently.

If a centralized drain is required when installing the
unit on a balcony or wall, follow the steps below to
drain off the water.

1 . Proceed with water-proofing by installing the

water-proof rubber caps  in the 2 elongated
holes on the base plate of the outdoor unit. [How
to install the water-proof rubber caps]

1) Place four fingers into each cap, and insert
the caps into the water drain holes by pushing
them into place from the underside of the
base plate.

2) Press down on the outer circumferences of
the caps to ensure that they hav e been
inserted tightly.
(Water leaks may result if the caps have not
been inserted properly, if their outer circumfer­ences lift up or the caps catch on or wedge
against something.)

10-4-3. Refrigerant Piping Connection

Flaring

1. Cut the pipe with a pipe cutter.

90˚

Obliquity Roughness Warp

Fig. 10-4-4

2. Insert a flare nut into the pipe, and flare the pipe.

• Projection margin in flaring : A (Unit : mm)

Rigid (Clutch type)

Outer dia. of

copper pipe

6.35

9.52

R410A

tool used

0 to 0.5
0 to 0.5

Conventional

tool used

1.0 to 1.5

1.0 to 1.5

10

Water-proof rubber caps

(supplied with the outdoor unit)

Base plate

9 Drain nipple

Fig. 10-4-2

2. Install the drain nipple  and a commercially
available drain hose (with 16 mm inside diam­eter), and drain off the water.
(For the position where the drain nipple  is
installed, refer to the installation diagr am of the
indoor and outdoor units.)

• Check that the outdoor unit is horizontal, and

route the drain hose at a downward sloped
angle while ensuring that it is connected tautly.

12.7

0 to 0.5

Imperial (Wing nut type)

Outer dia. of

copper pipe

6.35

9.52

12.7

R410A

1.5 to 2.0

1.5 to 2.0

2.0 to 2.5

• Flaring size : B (Unit : mm)

Fig. 10-4-6

Outer dia. of copper pipe

6.35

9.52

1.0 to 1.5

Die Pipe

Fig. 10-4-5

B

+0

B

–0.4

R410A R22

9.1 9.0

13.2 13.0

A

Base plate

9 Drain nipple

Commercially available
drain hose

Do not use ordinary garden hose, but one can
flatten and prevent water from draining.

Fig. 10-4-3

12.7

16.6 16.2

• In case of flaring for R410A with the conventional
flare tool, pull it out approx. 0.5 mm more than that
of R22 to adjust to the specified flare size.

The copper pipe gauge is useful for adjusting
projection margin size.

– 56 –

Tightening Connection

Use a vacuum pump

Align the centers of the connecting pipes and tighten
the flare nut as much as possible with y our fingers.
Then tighten the nut with a wrench and torque
wrench as shown in the figure.

Half union

Externally
threaded side

Use a wrench
to secure.

Flare nut

Internally
threaded side

Use a torque wrench
to secure.

Fig. 10-4-7

CAUTION

• Do not apply excessiv e force.
Otherwise, the nut may break.

(Unit : N·m)

Outer dia. of copper pipe

Ø6.35 mm
Ø9.52 mm
Ø12.7 mm

Tightening torque

14 to 18 (1.4 to 1.8 kgf•m)
33 to 42 (3.3 to 4.2 kgf•m)
50 to 62 (5.0 to 6.2 kgf•m)

Be sure to use a vacuum pump with counter-flow
prevention function so that oil inside the pump does
not flow back into the air conditioner pipes when the
pump stops. (If oil inside the vacuum pump enters
into the air conditioner circuit which uses R410A,
trouble with the refrigeration system may de velop.)

1. Connect the charge hose from the manifold valve
to the service port of the gas side packed valve.

2. Connect the charge hose to the port of the
vacuum pump.

3. Open fully the low pressure side handle of the
gauge manifold valve.

4 . Operate the vacuum pump to begin evacuating.

Perform evacuating for about 15 minutes if the
piping length is 20 meters (15 minutes for 20
meters) (assuming a pump capacity of 27 liters
per minute).

Confirm that the compound pressure gauge
reading is –101 kPa (–76 cmHg).

5. Close the low pressure valv e handle of gauge
manifold.

6. Open fully the valve stem of the packed valves
(both sides of Gas and Liquid).

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

• Tightening torque for connection of flare pipe
The pressure of R410A is higher than R22.

(Approx. 1.6 times.) Therefore securely tighten the
flare pipes which connect the outdoor unit and the
indoor unit with the specified tightening torque
using a torque wrench.
If any flare pipe is
incorrectly connected,
it may cause not only

Flare at
indoor unit
side

a gas leakage but also
trouble in the
refrigeration cycle.

Flare at
outdoor unit
side

Fig. 10-4-8

10-4-4. Evacuating

After the piping has been connected to the indoor
unit, perform the air purge.

AIR PURGE

Evacuate the air in the connecting pipes and in
the indoor unit using a vacuum pump.
Do not use the refrigerant in the outdoor unit.

For details, see the vacuum pump manual.

Compound
pressure
gauge

-101kPa
(-76cmHg)

Handle Lo

Charge hose
(For R410A only)

Connecting
pipe

Pressure gauge

Manifold valve

Handle Hi
(Keep full closed)

Charge hose
(For R410A only)

Vacuum pump
adapter for
counter-flow
prevention
(For R410A only)

Vacuum
pump

Packed valve at liquid side

Packed valve at gas side
Service port
(Valve core (Setting pin))

Fig. 10-4-9

CAUTION

• IMPORTANT POINTS FOR PIPING WORK

1. Keep dust and moisture from entering the
pipes.

2. Tighten connections carefully (between pipes
and unit).

3. Evacuate the air in the connecting pipes
using a VACUUM PUMP.

4. Check for gas leaks at all connections.

– 57 –

Packed Valve handling precautions

• Open the valve stem all the way; but do not try to
open it beyond the stopper.

• Securely tighten the valve stem cap with torque in
the following tab le:

Gas side (Ø12.7 mm)
Gas side (Ø9.52 mm)
Liquid side (Ø6.35 mm)

Service port

50 to 62 N•m (5.0 to 6.2 kgf•m)

33 to 42 N•m (3.3 to 4.2 kgf•m)
14 to 18 N•m (1.4 to 1.8 kgf•m)

14 to 18 N•m (1.4 to 1.8 kgf•m)

Hexagonal wrench is required.

4mm

Fig. 10-4-10

10-4-5. Wiring Connection

1. Remove the valve cover, the electric parts cover

and the cord clamp from the outdoor unit.

2. Connect the connecting cable to the terminal as

identified by the matching numbers on the
terminal block of indoor and outdoor unit.

3. Insert the power cord and the connecting cable

fully into the terminal block and secure it tightly
with screws.

4. Insulate the unused cords (conductors) from

water entering in the outdoor unit. Locate them
so that they do not touch any electrical or metal
parts.

5. Secure the power cord and the connecting cable

with the cord clamp.

6. Attach the electric parts cover and the valve

cover on the outdoor unit.

Stripping length of connecting cable

Terminal block

123 LN

3

L

1012

N

10

10

40

Earth line Earth line

10

30

Connecting
cable

30

40

Power cord

Fig. 10-4-12

Model RAS-

Power source

Maximum running
current

Installation fuse
rating

Power cord
Connection cable

10GAVP-E 13GAVP-E 16GAVP-E

220 – 240 V ~50 Hz

220 V ~60 Hz

12 A

25A (D type )

H07RN-F or 245IEC66 (1.5 mm²)
H07RN-F or 245IEC66 (1.0 mm²)

CAUTION

• Incorrect wiring connection may cause electri­cal parts to burn out.

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

• Every wire must be securely connected.

• This installation fuse (25A D type )

must be used for the power supply line.

• If incorrect or incomplete wiring is carried out,
fire or smoke may result.

• Prepare the power supply for the exclusive use
of the air conditioner.

• This product can be connected to the main
breaker.

Connection to fixed wiring:
A switch which disconnects all poles and has a
contact separation of at least 3 mm must be
incorporated in the fixed wiring when connect­ing to a main breaker circuit.

Connecting cable Power cord

Fig. 10-4-11

– 58 –

10-5. Test Operation

10-5-1. Gas Leak Test

• Check the flare n ut connections for gas leaks with
a gas leak detector and/or soapy water.

Check places for
flare nut connections
(indoor unit)

Electric parts

Check places
for outdoor unit

Fig. 10-5-1

10-5-2. Test Operation

To test the system, press and hold RESET button for
10 sec. (There will be one short beep.)

Valve cover

10-5-4. Remote Controller Selector Switch

Setting

Remote controller selector switch

• If two indoor units are installed in the same room
or adjoining rooms, the second unit can inadvert­ently receive a remote controller signal and start
operation when operating the first unit. This can be
prev ented by setting one of the indoor units and
the corresponding remote controller to the B
setting (the A setting is the default setting).

1. Setting the selector switch on the main unit

• Remove the front panel, and then set the
selector switch to “B”.

• After making the switch setting, remount the
front panel.

2. Setting the remote controller

1) Slide open the remote controller cover and

remove the batteries.

2) Cut the jumper wire inside the battery

compartment using nippers.

• The jumper wire should not remain in
contact after being cut. Also, be careful
not to let plastic scraps, jumper wire
cuttings or other debris enter the inside of
the remote controller.

3) Insert the batteries. “B” appears in the
remote controller display.

3. Check that the indoor unit can be operated by
the modified remote controller.

Fig. 10-5-2

10-5-3. Auto Restart Setting

This product is designed so that, after a power
failure, it can restart automatically in the same
operating mode as before the pow er failure.

Information

The product was shipped with Auto Restart
function in the OFF position.
Turn it ON as required.

How to Set the Auto Restart

• Press and hold the RESET button for about 3
seconds. After 3 seconds, three short electric
beeps will be heard to inform you that the Auto
Restart has been selected.

• To cancel the Auto Restart, follow the steps
described in the section Auto Restart Function on
Owner’s Man ual.

Position of remote controller selector switch

Selector switch

Fig. 10-5-3

Cutting direction

HiPOWER

SWING

CLR

CLOCK
RESET

FIX

CHECK

ECO

FAN

OFF

ON

MEMO

1.3.5.9H

SLEEP

SET

Jumper wire

When switching between settings “A” and
“B”, always switch the indoor unit board
and the remote controller as a pair.
(Otherwise, the indoor unit will not
accept the remote controller’s signals.)

Fig. 10-5-4

– 59 –

11. HOW TO DIAGNOSE THE TROUBLE

The pulse motor circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according
to the trouble diagnosis procedure as described below. (Ref er to the check points in servicing written on the
wiring diagrams attached to the indoor/outdoor units.)

Table 11-1

No.

1
2
3
4
5

Troubleshooting Procedure

First Confirmation
Primary Judgment
Judgment by Flashing LED of Indoor Unit
Self-Diagnosis by Remote Controller
Judgment of Trouble by Every Symptom

Page

62
63
63
64
67

No.

6
7
8
9

10

Troubleshooting Procedure

How to Check Simply the Main Parts
Troubleshooting
How to Diagnose Trouble in Outdoor Unit
How to Check Simply the Main Parts
How to Simply Judge Whether Outdoor

Fan Motor is Good or Bad

K Precautions when handling the new inverter (3DV Inverter)

CAUTION: HIGH V OLTA GEN

The high voltage circuit is incorporated.
Be careful to do the check service, as the electric shock may be caused in case of touching parts on the

P.C. board by hand.

The new inverter (3D V inverter) will be incorporated starting with this unit.

(3DV: 3-shunt Discrete Vector control)

K The control circuitry has an uninsulated construction.

Page

72
73
75
76

81

Shared potential

Shared potential

G-Tr

Photocoupler

MCU

JAVP-E series (insulated type)

IGBT × 6

MCU

Driver

Driver

Amplifier

Amplifier

Compressor

Fan motor

FET
(6IN1)

Hall device

Photocoupler

Compressor

Fan motor

FET × 6

GAVP-E, EAVP-E series (uninsulated type)

Fig. 11-1

– 60 –

CAUTION

A high voltage (equivalent to the supply voltage) is also energized to ground through the
sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered
with insulated tubes for protection. Nevertheless, care must be taken to ensure that these
wires are not pinched.

Take sufficient care to avoid directly touching any of the circuit parts without first turning off
the power.

At times such as when the circuit board is to be replaced, place the circuit board assembly in
a vertical position.

Laying the board flat on an electrically conductive object (such as the top panel of the air conditioner's
outdoor unit) while a charge is still retained by the electrolytic capacitors of the inverter's main circuit may
cause short-circuiting between the electrolytic capacitors and secondary circuit components and result in
damage to the components.

Fig. 11-2

Do NOT lay the circuit board assembly flat.

K Precautions when inspecting the control section of the outdoor unit

NOTE :

A large-capacity electrolytic capacitor is used in the outdoor unit controller (inverter). Therefore, if the po wer
supply is turned off, charge (charging voltage DC280 to 380V) remains and discharging takes a lot of time.
After turning off the power source, if touching the charging section before discharging, an electrical shock may
be caused. Discharge the electrolytic capacitor completely by using soldering iron, etc.

< Discharging method >

1. Remove the inverter cover (plating) b y opening four mounting claws.

2. As shown below, connect the discharge resistance (approx. 100Ω40W) or plug of the soldering iron to

voltage between + – terminals of the C14 (“CAUTION HIGH VOLTAGE” is indicated.) electrolytic capacitor
(500µF/400V) on P.C. board, and then perform discharging.

Discharging position
(Discharging period
10 seconds or more)

Plug of
soldering iron

Inverter cover

P. C. board
(Soldered surface)

– 61 –

Fig. 11-3

11-1. First Confirmation

11-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON) normally.

11-1-2. Confirmation of Power Voltage

Confirm that power voltage is AC 220–230–240 ± 10%.
If power voltage is not in this range, the unit may not operate normally.

11-1-3. Operation Which is not a Trouble (Program Operation)

For controlling the air conditioner, the program operations are built in the microcomputer as described in the
following tabl e.

If a claim is made for running operation, check whether or not it meets to the contents in the following table.
When it does, we inform you that it is not trouble of equipment, but it is indispensable for controlling and main-

taining of air conditioner.

Table 11-1-1

No.

1

When power breaker is turned “ON”, the
operation indicator (Green) of the indoor
unit flashes.

2

Compressor may not operate even if the
room temperature is within range of
compressor-ON.

3

In Dry and ECO mode, FAN (air flow)
display does not change e ven though FAN
(air flow select) button is operated.

4

Increasing of compressor motor speed
stops approx. 30 seconds after operation
started, and then compressor motor speed
increases again approx. 30 seconds after.

5

In AUTO mode, the operation mode is
changed.

Operation of air conditioner

Description

The OPERATION lamp of the indoor unit flashes when
power source is turned on. If [START/STOP] button is
operated once, flashing stops.
(Flashes also in power failure)

The compressor does not operate while compressor
restart delay timer (3-minutes timer) operates.
The same phenomenon is found after power source has
been turned on because 3-minutes timer operates.

The air flow indication is fixed to [AUTO].

For smooth operation of the compressor, the compres­sor motor speed is restricted to Max. 41 rps for 2 min­utes, and Max.91 rps for 2 minutes to 3 minutes, respec­tively after the operation has started.

After selecting Cool or Heat mode, select an operation
mode again if the compressor keeps stop status for 15
minutes.

6

In HEAT mode, the compressor motor
speed does not increase up to the maxi­mum speed or decreases before the
temperature arrives at the set temperature.

The compressor motor speed may decrease by high­temp. release control (Release protective operation by
temp.-up of the indoor heat exchanger) or current
release control.

– 62 –

11-2. Primary Judgment

To diagnose the troubles, use the following methods.

1) Judgment by flashing LED of indoor unit

2) Self-diagnosis by service check remote controller

3) Judgment of trouble by every symptom

Firstly use the method 1) for diagnosis. Then, use the method 2) or 3) to diagnose the details of troub les.

11-3. Judgment by Flashing LED of Indoor Unit

While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the
contents of self-diagnosis are displayed with block on the indoor unit indication section.

Table 11-3-1

Indoor indication

lamp flashes.

Which lamp

does flash?

Item

A

B

C

D

E

Check

code

Block display Description for self-diagnosis

OPERATION (Green)
Flashing display (1 Hz)

OPERATION (Green)
Flashing display (5 Hz)

OPERATION (Green)
TIMER (Yellow)
Flashing display (5 Hz)

OPERATION (Green)
FILTER (Orange)
Flashing display (5 Hz)

OPERATION (Green)
TIMER (Yellow)
FILTER (Orange)
Flashing display (5 Hz)

Power failure (when power is ON)

Protective circuit operation for indoor P.C. board

Protective circuit operation for connecting cable
and serial signal system

Protective circuit operation for outdoor P.C. board

Protective circuit operation for others
(including compressor)

NOTES :

1. The contents of items B and C and a part of item E are displayed when air conditioner operates.

2. When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B.

3. The check codes can be confirmed on the remote controller for servicing.

– 63 –

11-4. Self-Diagnosis by Remote Controller (Check Code)

1. If the lamps are indicated as shown B to E in Table 11-3-1, ex ecute the self-diagnosis b y the remote controller.

2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condi-

tion and indicates the information of the self-diagnosis on the display of the remote controller with the check
codes. If a fault is detected, all lamps on the indoor unit will flash at 5Hz and it will beep for 10 seconds
(Beep, Beep, Beep ... ). The timer lamp usually flashes (5Hz) during self-diagnosis.

11-4-1. How to Use Remote Controller in Service Mode

1

Press [CHECK] button with a tip of pencil to set the
remote controller to the service mode.

• “ ” is indicated on the display of the remote
controller.

2

Press [ON ] or [OFF ] button

If there is no fault with a code, the indoor unit will beep
once (Beep) and the display of the remote controller will
change as follows :

FIX

ON

CHECK

TEMP

ECO

FAN

OFF

AUTO

PRESET

MEMO

1.3.5.9H

SLEEP

SET

PURE

MODE

HiPOWER

SWING

CLR

CLOCK

RESET

Alphanumeric characters are
used for the check codes.
is 5. is 6.
is A. is B.
is C. is D.

• • •

• The TIMER indicator of the indoor unit flashes continuously.

(5 times per 1 sec.)

• Check the unit with all 52 check codes ( to )
as shown in Table-11-4-1.

• Press [ON ] or [OFF ] button to change the check
code backward.

If there is a fault, the indoor unit will beep for 10
seconds (Beep, Beep, Beep...).

Note the check code on the display of the remote
controller.

• 2-digits alphanumeric will be indicated on the display.

• All indicators on the indoor unit will flash.

(5 times per 1 sec.)

Press [START/STOP] button to release the service mode.

3

• The display of the remote controller returns to as it
was before service mode was engaged.

Time shortening method.

4

1. Press SET button while pushing CHECK button.

2. Press [START/STOP] button.

Fig. 11-4-1

– 64 –

11-4-2. Caution at Servicing

1. After servicing, press the START/STOP button to return to the normal mode.

2. After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power

supply again so that memory in the microcomputer returns the initial status.
Howe ver, the check codes are not deleted even if the power supply is turned off because they are stored in

the fixed memory.

3. After servicing, press [CLR] button under check mode status and then send the check code “7F” to the

indoor unit. The error code stored in memory is cleared.

Table 11-4-1

Block distinction

Check

code

Indoor P.C.
board etc.

Not
displayed

Connecting
cable and
serial signal

Block

Check

code

Operation of diagnosis function

Cause of operation

Short-circuit or discon­nection of the room
temperature sensor
(TA sensor).

Being out of place,
disconnection, short­circuit, or migration of
heat exchanger sensor
(TC sensor)

Lock of indoor fan or
trouble on the indoor fan
circuit

Trouble on other indoor
P.C. boards

Return serial signal is not
sent to indoor side from
operation started.

1) Defective wiring of
connecting cable

2) Operation of compres­sor thermo Gas
shortage Gas leak

Air

conditioner

status

Operation
continues.

Operation
continues.

All off

Operation
continues.

Operation
continues.

Remarks

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Flashes when
trouble is detected
on Return serial
signal, and normal
status when signal
is reset.

Judgment and action

1. Check the room temp. sensor.

2. When the room temp. sensor is
normal, check P.C. board.

1. Check heat exchanger sensor.

2. When heat exchanger sensor is
normal, check P.C. board.

1. Check the motor.

2. When the motor is normal,
check P.C. board.

Replace P.C. board.

1. When the outdoor unit never
operate:

1) Check connecting cable, and

correct if defective wiring.

2) Check 25A fuse of inverter

P.C. board.

3) Check 3.15A of inverter P.C.

board.

2. To display [Other] block during
operation, check compressor
thermo. operation and supply
gas (check gas leak also).

3. Unit operates normally during
check.
If return serial signal does not
stop between indoor terminal
board 2 and 3, replace inverter
P.C. board.
If signal stops between indoor
terminal board 2 and 3, replace
indoor P.C. board.

– 65 –

Block distinction

Check

code

Block

Outdoor P.C.
board

Not
displayed

Outdoor P.C.
board

Others
(including
compressor)

Check

code

Operation of diagnosis function

Cause of operation

Inverter over-current
protective circuit
operates. (Short time)

Position-detect circuit
error or short-circuit
between windings of
compressor

Current-detect circuit
error

Being out of place,
disconnection or short­circuit of the outdoor
heat exchanger sensor
(TE) or suction temp.
sensor (Ts)

Disconnection or short­circuit of discharge
temp. sensor

Outdoor fan drive
system error

Outdoor heat exchanger
temp. sensor error

Compressor drive output
error, Compressor error
(lock, missing, etc.),
Break down

Return serial signal has
been sent when
operation started, but it
is not sent from halfway.

1) Compressor thermo.
operation
Gas shortage
Gas leak

2) Instantaneous power
failure

Compressor does not
rotate.
(Current protective
circuit does not operate
when a specified time
passed after compressor
had been activated.)

Discharge temp.
exceeded 117°C

Break down of
compressor

4-way valve inverse error
(TC sensor value
lowered during heating
operation.)

Air

conditioner

status

All off

All off

All off

All off

All off

All off

Operation
continues

All off

Operation
continues

All off

All off

All off

Operation
continues

Remarks

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

——

Displayed when
error is detected.

Flashes when
trouble is detected
on return serial
signal, and normal
status when signal
is reset.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

——

Judgment and action

Even if trying operation again, all
operations stop immediately. :
Replace P.C. board.

1. Even if connecting lead wire of
compressor is removed,
position-detect circuit error
occurred. : Replace P.C. board.

2. Measure resistance between
wires of compressor, and
perform short-circuit. : Replace
compressor.

Even if trying operation again, all
operations stop immediately. :
Replace P.C. board.

1. Check sensors (TE, TS).

2. Check P.C. board.

1. Check discharge temp. sensor
(TD).

2. Check P.C. board

Position-detect error, over-current
protective operation of outdoor fan
drive system, fan lock, etc. :
Replace P.C. board or fan motor.

1. Check outdoor temp. sensor
(TO).

2. Check P.C. board.

When 20 seconds passed after
start-up, position-detect circuit error
occurred. : Replace compressor.
Trouble on P.M.V.

1. Repeat Start and Stop with
interval of approx. 10 to 40
minutes. (Code is not displayed
during operation.)
Supply gas.
(Check also gas leak).

2. Unit operates normally during
check.
If return serial signal does not
stop between indoor terminal
block 2 and 3, replace inverter
P.C. board.
If signal stops between indoor
terminal block 2 and 3, replace
indoor P.C. board.

1. Trouble on compressor

2. Trouble on wiring of compressor
(Missed phase)

1. Check dischage temp. sensor
(TD).

2. Gas leakage

3. Trouble on P.M.V.

1. Check power voltage.
(220–230–240 V +10%)

2. Overload operation of refrigera­tion cycle
Check installation condition
(Short-circuit of outdoor diffuser).

1. Check 4-way valve operation.

– 66 –

11-5. Judgment of Trouble by Every Symptom

11-5-1. Indoor Unit (Including Remote Controller)

(1) Power is not turned on (Does not operate entirely)
<Primary check>

1. Is the supply voltage normal?

2. Is the normal voltage provided to the outdoor unit?

3. Is the crossover cable connected properly?

4. Is the fuse (F01) blown?

Operation

Check Item

Considerable principle cause

NO

indicated on rear of

Is DC310–340V

supplied between

CN10 1 – 3 ?

Turn off power supply once, and
5 second later, turn it on again.

NO

Is OPERATION indicator flashing?

Is fuse (F01)

of indoor control

board blown?

NO

Is voltage

(DC12V or 5V)

indoor control

board normal?

NO

Parts of a power supply circuit

YES

Is it possible to turn on

power supply by pushing

[START/STOP] button

on remote controller?

YES YES

Unit operates normally.

YES YES

Parts (R04, R05, DB01, C01,

C03, IC01 and T01) are defective.

YES

defective.

Does transmission mark

NO NO

on remote controller flash

normally,and is its signal

transmitted properly?

Does fan

motor connector

between CN10 1 –

3 short-circuit?

Microcomputer

is defective.

NO

Measures

Item by symptoms

Remote controller is defective.

Refer to (5) “Troubleshooting
for remote controller”.

Replace main
P.C. board

YES

Replace fan
motor.

• Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of
damage of the motor.

(2) Power is not turned on though Indoor P.C. board is replaced
<Confirmation procedure>

Turn on power supply.

Does OPERATION indicator flash?

YES YES

NO

Is wired correctly to white and

black lead wires of terminal block?

NO

Correct wiring.

To item of

“Power supply is not turned on”.

– 67 –

(3) Only the indoor motor fan does not operate
<Primary check>

1. Is it possible to detect the power supply voltage (AC220–240V) between Q and R on the terminal block?

2. Does the indoor fan motor operate in cooling operation?

(In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned
on, to prev ent a cold air from blowing in.)

Turn off power
supply once, and
turn it on again.

Does fan motor

continue to operate?

NO

Start to operate
indoor unit in cooling
operation at airflow
level “LOW”.

Does indoor

fan operate?

YES

Change airflow level
to “HIGH”.

Is it possible to

change airflow level

to “HIGH”?

YES

YES

Is it possible to detect

DC 1V or more between

5

+ and 3 – of

motor connector (CN10).

YES

Is it possible to detect

NO

DC 310–340V between

1

+ and 3 – of motor

connector (CN10).

YES

(Motor connection condition)

Is it possible to detect DC 15V

between

4

motor connector (CN10).

+ and 3 – of

YES

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible to

detect DC 1V or more between

5

+ and 3 – of motor

connector (CN10)?

YES

NO

Is it possible to

rotate cross-flow fan by

hand properly?

YES

NO

NO

Turn off indoor unit and remove
connector from motor.

NO

Then push START/STOP button
on remote controller to stop
flashing lamp on indoor unit.

Is it possible to detect

DC 15V between 4 +

and 3 – of motor

connector (CN10).

Turn off indoor unit and

NO

remove connector from motor.
Then start to operate indoor
unit with remote controller.

Start to operate the

indoor unit in except

heating operation.
At this time, is it possible
to detect DC 1V or more

between

of motor connector (CN10)?

within 15 seconds after

5

+ and 3 –

(Check this condition

starting unit.)

NO

YES

YES

NO

NO

Peplace indoor
fan motor.

Peplace main
P.C. board.

Peplace
bearing.

Fan motor
operates normally.

Turn off indoor unit

and rotate cross-flow

fan by hand when the

unit is on standby.

At this time, is it possible to

detect DC 1V or more

5

between

+ and 3 –

of motor connector

(CN10).

YES

NO

– 68 –

(4) Indoor fan motor automatically starts to rotate by turning on power supply
<Cause>

The IC is built in the indoor f an motor. Therefore the P.C . board is also mounted to inside of the motor.
If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning

on power supply.

<Inspection procedure>

1. Remove the front panel. (Remove 2 screws.)

2. Remove the cover of the fan motor lead wires.

3. Check DC voltage with CN10 connector while the fan motor is rotating.

NOTE :

• Do not disconnect the connector while the fan motor is rotating.

• Use a thin test rod.

Indoor fan starts rotating when power supply is turned on.

P.C. board

(Check output DC voltage of fan motor on P.C. board.)

Measure voltage between 3 (GND : BLACK)

and 5 (V line : YELLOW) of motor connector (CN10)

while indoor fan motor is rotating.

DC 1.0V or more

P.C. board is defective.

Replace P.C. board. Replace motor.

Under DC 1.0V

Motor is defective.

Yellow

Black

DC

CN10

6 (Blue)
5 (Yellow)
4 (White)
3 (Black)
2 –
1 (Red)

– 69 –

(5) Troubleshooting for remote controller
<Primary check>

Check that A or B selected on the main unit is matched with A or B selected on the remote controller.

Is receiver

on indoor unit

exposed to

direct sunlight?

YES

NO

Is there any

thyristor

fluorescent light

nearby?

YES

NO

Push the START/STOP button.

Is transmission
mark indicated?

YES

Does indoor unit

NO

operate when moving

remote controller

near receiver or

indoor unit?

YES

Batteries are

exhausted.

The unit does not beep at all.
Operation lamp on indoor
unit is not indicated.

NO

Push RESET button
on remote controller
with tip of pencil.

Avoid direct
sunlight.

NO

Keep indoor unit
away from thyristor
fluorescent light.

Does indoor unit

start to operate by

automatic restart

function?

YES

Does radio sound

is affected by remote

controller when a signal is

transmitted at distance of

5 cm from radio?

YES

P.C. board
is defective.

Replace
P.C. board.

NO

NO

Replace
batteries.

Push the START/
STOP button

Is transmission

mark indicated?

YES

Does indoor unit

beep and operate?

YES

Normal

operation

NO

Remote controller

is defective.

Replace
remote controller.

NOTE : After replacing batteries,

push the RESET button
with a tip of a pencil.

– 70 –

11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)

(1) Outdoor unit does not operate

1) Is the voltage between R and S of the indoor terminal block varied?
Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the follow-

ing diagram.

NOTE:

• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.

• Be sure to prepare a diode for judgment.

Terminal block at indoor side

Red

White

3
2

Terminal block

1

S5277G

S5277G or equivalent (G or J type)
(Diode with rated voltage of 400V
or more is acceptable.)

Tester

Normal time : V oltage swings between DC15 and 60V. ...................Inverter Assembly check (11-8-1.)

Abnormal time : Voltage does not vary.

(2) Outdoor unit stops in a little while after operation star ted
<Check procedure> Select phenomena described below.

1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are required to
restart the unit.

Gas circulation amount is down.

Measure gas pressure.

Thermo. operation of compressor

Gas shortage
Gas leak
Pipe clogging

2) If the unit stops once, it does not operate until the pow er will be turned on again.

To item of Outdoor unit does not operate.

3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed.
(Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)

Gas leak
P.M.V. is defective.
Miswiring of connecting wires of indoor/outdoor units
Clogging of pipe and coming-off of TC sensor

Refer to the chart in 11-6.

– 71 –

11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E

<Check procedure>

1C 1E

Gas leakage,
disconnection of TS/TC
sensors (Check code 02, 1C)

Valve drive check

Discharge temp. error,
gas leakage
(Check code 03, 1E)

Is coil of the pulse motor valve

(P.M.V.) correctly set?

YES

Is connecter of coil connected to inverter?

YES

from valve when the air conditioner starts the operation after turning off power

Is positioning sound of valve (sound hitting to stopper) heard

of the air conditioner once?

YES

Are temp. sensors of indoor/outdoor units correctly set to the holder?

NOTE :

The temperature sensors which are used to control pulse motor valve
include indoor heat exchanger sensor (TC), outdoor heat exchanger temp.
sensor (TE), outdoor suction temp. sensor (TS) and outdoor sensor (TO).

YES

NO

NO

NO

NO

Set it correctly.

Set it correctly.

Replace coil valve.

Set it correctly.

Gas amount check and valve clogging check

Remove TC sensor connector from the P.C. board in indoor unit.
(Remove connector from the P.C. board.)
Operate the air conditioner in COOL mode by TEMP button
(“Beep” sound is heard if keeping pushed for 10 seconds.).
The operation enters temporary operation mode which fixes opening degree of compressor speed.
Check condensation at outlet of PMV, and then check operating pressure from the service port.

If there is condensation at outlet (1/4 inch=Ø6.35mm valve side),

Check the operating pressure from service port, and add gas if pressure is low.

Existence of condensation at outlet of P.M.V.

the valve is clogged.

YES

– 72 –

Replace valve.

Add gas.

11-7. Troubleshooting

11-7-1. How to Check Whether the Air Purifier is Good or Not

Turn off the power breaker once,
and turn on again after 10 seconds.

Does the OPERATION indicator flash?

YES

Turn off the power breaker and remove
CN34 (Micro switch connector).
Short-circuit between and pin
of CN34 at PC side, and turn on the
power breaker after 10 seconds.

Is DC12V applied

between (Red/DC12V) and

(Brown/GND) of CN1 of the

Primary checkOperation check

micro-switch connector under

OFF status of the micro-switch

micro-switch connector under
ON status of the micro-switch

1) Check operation while short-circuiting CN34 of the main P.C. board.

2) Perform air purifying operation by the remote controller.

• In this time, check that the remote controller is in status which is shortened by time on
the reactivation preventive timer and all display indicators go on for approx. 3 seconds
when a signal is received.
If time on the reactivation preventive timer is not shortened,
the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed.
(Because the power ON/OFF is controlled on the program)

3) Be sure not to touch the electric dust collector, ionizer, or ionized wire unit with the human body.

Does the PURE indicator (Blue) or

the FILTER indicator (Orange) go on?

it was ON, and does the FILTER

Refer to items, cleaning and check
for the electric dust collector/ionizer/
ionized wire units.
When the ionized wire is
disconnected or when dirt is

( )

not cleaned even cleaned,
replace each unit.

1 1 2

high-voltage generator?

Is there conduction of

(Front panel opened)?

Is there conduction of

(Front panel closed)?

( )

Does the indoor fan rotate?

Does the PURE indicator

go off within 2 seconds after

indicator (Orange) go on?

Are the electric dust

collector and ionizer dried?

(Electrode check)

1 2

YES

NO

YES

YES

YES

YES

YES

NO

NO NO

YES

NO

NO

NO

NO

Dry the electric

NO

dust collector
and ionizer.

Referring to the right figure, check the
high-output voltage of the air filter unit.
(NOTE)
Use an exclusive high voltage tester;
otherwise the tester may be broken.

YES

Is DC12V applied

between (+) and (–)

of CN33 of the main

P.C. board (MCC5020)?

YES

Micro-switch is stuck

Micro-switch malfunction

Is DC-5V to DC-10V

applied between

(Brown/Negative voltage)

4

2

and (Brown/GND)

of CN33 of the main

P.C. board?

YES

YES

Is output of the ionizer

approx. 4.0 kV to 4.8 kV?

Is output of the collector

approx. 3.0 kV to 3.8 kV?

YES

Are the electric dust

collector/ionizer/ionized

wire units dirty?

Is an abnormal sound

(cracking noise) heard

from the electrode?

To item “Power supply is not turned on”

Replace the main P.C. board (MCC5020)

Replace micro-switch.

• Conduction check of micro-switch

Push the switch

ON

→ ON
Release the switch
→ OFF

Tester

To item “Only indoor fan does not operate”

Replace the main P.C. board (MCC5020).

• How to check output of the air purifier

NO

Be sure not to come
to contact to the gray
part or not to touch
the ionized cables.

NO

NO

<Caution on High Voltage!!>

High-voltage tester

Replace the high-voltage generator.

No trouble

GND

Collector
output

Ionizer
output

– 73 –

11-7-2. How to Check Whether the Minus Ion Generator is Good or Not

Turn off the power breaker once,
and turn on again after 10 seconds.

Does the OPERATION indicator flash?

YES

Turn off the power breaker and remove
CN34 (Micro switch connector).
Short-circuit between and pin
of CN34 at PC side, and turn on the
power breaker after 10 seconds.

Is DC12V applied

between (Red/DC12V) and

(Brown/GND) of CN1 of the

2

Primary checkOperation check

micro-switch connector under

OFF status of the micro-switch

micro-switch connector under
ON status of the micro-switch

1) Check operation while short-circuiting CN34 of the main P.C. board.

2) Perform air purifying operation by the remote controller.

• In this time, check that the remote controller is in status which is shortened by time on
the reactivation preventive timer and all display indicators go on for approx. 3 seconds
when a signal is received.
If time on the reactivation preventive timer is not shortened,
the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed.
(Because the power ON/OFF is controlled on the program)

3) Be sure not to touch the electrode with the human body.

1

high-voltage generator

in the air purifier?

Is there conduction of

(Front panel opened)?

Is there conduction of

(Front panel closed)?

( )

12

YES

NO

YES

NO

NO

YES

NO

Micro-switch is stuck

Micro-switch malfunction

To item “Power supply is not turned on”

Replace the power P.C. board

(MCC5020) or the housing assembly.

Replace micro-switch.

• Conduction check of micro-switch

Push the switch
→ ON

ON

Release the switch
→ OFF

Tester

Does the indoor fan rotate?

YES

Does the PURE indicator (Blue) or

the FILTER indicator (Orange) go on?

YES

Does the PURE indicator

go off within 2 seconds after

it was ON, and does the FILTER

indicator (Orange) go on?

NO

Referring to the right figure, check the
high-voltage output of the air ionizer.
In this time, peel the thermal insulator, and attach
it to the original position after check operation.

NOTE :
Use an exclusive high voltage tester; otherwise
the tester may be broken.

NO

Does the electrode

output approx. –6kV?

NO

Replace the

high-voltage generator

NO

NO

YES

YES

No trouble

To item “Only indoor fan does not operate”

Replace the main P.C. board (MCC5020).

To item “How to check whether

the air purifier is good or not”

• How to check output of minus ion
<Caution on High Voltage!!>

high-voltage
unit

Electrode

GND

– 74 –

High-voltage tester

11-8. How to Diagnose T rouble in Outdoor Unit

11-8-1. Summariz ed Inner Diagnosis of Inverter Assembly

Table 11-8-1

Diagnosis/Process flowchart Item

Preparation

Remove connector
of compressor.

Check 25A fuse

(Part No.F01).

OK

Check

terminal voltage

of electrolytic

capacitor.

OK

NG

Replace fuse.

Check

electrolytic

capacitor, diode

block (DB01),

etc.

NG

Check

electrolytic

capacitor, diode

(DB01),

etc.

Check

Check

Contents

Turn “OFF” the power supply
breaker, and remove 3P
connector which connects
inverter and compressor.

• Check whether 25A fuse
on the control board
assembly is blown or not.
(F01)

Summary

If fuse was blown, be sure to
check the electrolytic
capacitor and diode block.
(DB01)

• Connect discharge
resistance (approx. 100Ω,
40W) or soldering iron
(plug) between +, –
terminals of the electro­lytic capacitor (760µF) of
C14 (with printed CAU­TION HIGH VOLTAGE) on
P.C. board.

Discharging position
(Discharging period
10 seconds or more)

Plug of
soldering
iron

Does outdoor

fan rotate?

YES

NG

Replace
outdoor
fan motor.

NO

Remove connector

CN300 of outdoor fan

motor, and using a

tester, check resistance

value between every
phases at motor side.

OK

BA

Operation

Measure-

ment

Check

Stop

Check

Measure-

ment

Turn on the power breaker,
and operate the air condi­tioner in COOL mode by time
shortening.

Measure terminal voltage of
the electrolytic capacity.

760µF:400WV × 3

After operation, turn off the
power breaker after 2
minutes 20 seconds passed,
and discharge the electro­lytic capacitor by soldering
iron.
Check voltage between
motor phases.

• Is not winding between

R‚ R-S

, or Q-S opened

Q

or short-circuited?

• Is not frame grounded with
, or S?

Q, R

OK if 760µF →
DC280 to 380V

Remove CN300 while
pushing the part indicated
by an arrow because CN300
is a connector with lock.

­→ Resistance between

phases should be
approx. 55 to 77Ω

→ Should be 10MΩ or

more.

– 75 –

Diagnosis/Process flowchart Item

Contents

Summary

Check

compressor

winding

resistance.

OK

Replace

control board.

BA

Replace control
board assembly.

NG

Replace

compressor.

Check

Operation

Check winding resistance
between phases of compres­sor, and resistance between
outdoor frames by using a
tester.

• Is not grounded.

• Is not short-circuited

between windings.

• Winding is not opened.

Remove connector CN300 of
the outdoor fan motor, tur n
on the power supply breaker,
and perform the operation.
(Stops though activation is
prompted.)

Check operation within 2
minutes 20 seconds after
activation stopped.

→ OK if 10MΩ or more



→ OK if 0.51Ω → 0.57Ω



(Check by a digital tester.)



11-9. How to Check Simply the Main Parts

11-9-1. How to Check the P.C. Board (Indoor Unit)

(1) Operating precautions

1) When removing the front panel or the P.C. board, be sure to shut off the pow er supply breaker.

2) When removing the P.C. board, hold the edge of the P.C. board and do not apply force to the parts.

3) When connecting or disconnecting the connectors on the P.C. board, hold the whole housing. Do not pull
at the lead wire.

(2) Inspection procedures

1) When a P.C. board is judged to be defective , check for disconnection, burning, or discoloration of the
copper foil pattern or this P.C. board.

2) The P.C. board consists of the following 2 parts

a. Main P.C. board part :

DC power supply circuit (5V, 12V, 15V), Indoor fan motor control circuit, CPU and peripheral circuits,
buzzer, and Driving circuit of louver.

b. Indication unit of infrared ray receiving infrared ray receiving circuit, LED :

To check defect of the P.C. board, follow the procedure described below.

– 76 –

(3) Check procedures

Table 11-9-1

No.

1

Turn off the power supply breaker
and remove the P.C. board
assembly from electronic parts
base. Remove the connecting
cables from the terminal block.

2

Remove the connector of the
motor and turn on the power
supply breaker. If OPERATION
indicator flashes (once per
second), it is not necessary to
check steps (1 to 3) in the right
next column.

3

Push [START/STOP] button once
to start the unit. (Do not set the
mode to On-Timer operation.)

4

Shorten the restart delay timer
and start unit.

5

Push [START/STOP] button once
to start the unit,

• Shorten the restart delay timer.

• Set the operation mode to

COOL.

• Set the fan speed level to
AUTO.

• Set the preset temperature
much lower than the room
temperature. (The unit (com­pressor) operates continuously
in the above condition.)

Procedure

Check points

Check whether or not the fuse (F01)
is blown.

Check power supply voltage :

1. Between No. 1 and No. 3 of CN23
(AC 220–240V)

2. Between and of C03
(DC 310–340V)

3. Between of C10 and output
side of IC08 (DC 15V)

4. Between 12V and GND

5. Between 5V and GND

Check power supply voltage :

1. Between CN21 and
No. 1 of CN23 (DC 15–60V)

Check whether or not all indicators
(OPERATION, TIMER, FILTER,
PURE) are lit for 3 seconds and they
return to normal 3 seconds later.

1. Check whether or not the com­pressor operates.

2. Check whether or not the OP­ERATION indicator flashes.

Causes

Impulse voltage was applied or the
indoor fan motor short-circuited.

1. The terminal block or the crossover
cable is connected wrongly.

2. The capacitor (C01), line filter
(L01), resistor (R05), or the diode
(DB01) is defective.

3. IC01, IC08 and T01 are defective.

4. IC01, IC08 and T01 are defective.

5. IC01, IC08, IC07 and T01 are
defective.

IC03 and IC04 are defective.

The indicators are defective or the
housing assembly (CN13) is defective.

1. The temperature of the indoor heat
exchanger is extremely low.

2. The connection of the heat ex­changer sensor is loose.
(The connector is disconnected.)
(CN01)

3. The heat exchanger sensor and the
P.C. board are defective.
(Refer to Table 11-4-1.)

4. The main P.C. board is defective.

6

If the above condition (No. 5) still
continues, start the unit in the
following condition.

• Set the operation mode to
HEAT.

• Set the preset temperature
much higher than room tem­perature.

7

Connect the motor connector to
the motor and turn on the power
supply.
Start the unit the following
condition.

• Set the fan speed level to HIGH.
(The unit (compressor) operates
continuously in the above
condition in No. 5.)

1. Check whether or not the com­pressor operates.

2. Check whether or not the OP­ERATION indicator flashes.

1. Check it is impossible to detect
the voltage (DC 15V) between 3
and 4 of the motor terminals.

2. The motor does not operate or
the fan motor does not rotate with
high speed.
(But it is possible to receive the
signal from the remote controller.)

3. The motor rotates but vibrates
strongly.

– 77 –

1. The temperature of the indoor heat
exchanger is extremely high.

2. The connection of the heat ex­changer sensor short-circuited.
(CN01)

3. The heat exchanger sensor and the
P.C. board are defective.
(Refer to Table 11-4-1.)

4. The main P.C. board is defective

1. The indoor fan motor is defective.
(Protected operation of P.C. board.)

2. The P.C. board is defective.

3. The connection of the motor
connector is loose.

11-9-2. P.C. Board Layout

GND

+12V

[1] Sensor characteristic table

100

90
80
70
60
50
40
30

Resistance value (k )

20
10

0

01020304050

Temperature (˚C)

TD

TA, TC, TO, TE, TS

+5V

TD : Discharge temp. sensor
TA : Room temp. sensor
TC : Heat exchanger temp. sensor
TO : Outdoor temp. sensor
TE : Outdoor heat exchanger temp. sensor
TS : Suction temp. sensor

– 78 –

11-9-3. Indoor Unit (Other Parts)

k

k

No.

1

Room temp. (TA) sensor

Part name

Heat exchanger (TC) sensor

23Remote controller

Louver motor
MP24Z

4 Indoor fan motor

11-9-4. Outdoor Unit

No.

1

Compressor
(Model : DA111A1F-20F1)

Part name

Checking procedure

Disconnect the connector and measure the resistance value with tester.
(Normal temp.)

Sensor

Temperature

TA, TC (kΩ)

10°C20°C25°C30°C40°C

20.7 12.6 10.0 7.9 4.5

Refer to 11-5-1. (5).
Measure the resistance value of each winding coil by using the tester.

(Under normal temp. 25°C)

White
Yellow
Yellow
Yellow
Yellow

1

1

2

2

3

3

4

4

5

5

Position

1 to 2
1 to 3
1 to 4
1 to 5

Resistance value

380 ± 40Ω

Refer to 11-5-1. (3) and (4).

Checking procedure

Measure the resistance value of each winding by using the tester.

Red

Position

Resistance value

Red - White

White - Black

0.88 to 0.98Ω

Black - Red

White Blac

Under 20°C

2

Outdoor fan motor
(Model : ICF-140-43-4R)

3

4-way valve coil
(Model : VHV)

4

Pulse motor valve coil
(Model : CAM-MD12TF-6)

Outdoor temperature sensor

5

(TO), discharge temperature
sensor (TD), suction
temperature sensor (TS),
outdoor heat exchanger
temperature sensor (TE)

Measure the resistance value of winding by using the tester.

Red

White Blac

Position

Red - White

White - Black

Black- Red

Resistance value

17 to 25kΩ
17 to 25kΩ
17 to 25kΩ

Measure the resistance value of winding by using the tester.

Resistance value

1435 ± 144Ω

Under 20°C

Measure the resistance value of winding by using the tester.

COM

1
6

R

3

O

Position

Red - White

White - Orange

Brown- Yellow

COM

YWBR BL

254

Brown- Blue

Resistance value

42 to 50kΩ
42 to 50kΩ
42 to 50kΩ
42 to 50kΩ

Under 20°C

Disconnect the connector, and measure resistance value with the tester.
(Normal temperature)

Sensor

Temperature

TD (kW)

TO,TS,TE (kW)

10°C20°C25°C30°C40°C50°C

100 64 50 41 27 18

20.7 12.6 10.0 7.9 4.5 —

– 79 –

11-9-5. Checking Method for Each Part

No.

1

2 Diode block 1. Turn OFF the power supply breaker.

Part name

Electrolytic capacitor
(For boost, smoothing)

Checking procedure

1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely.

3. Check that safety valve at the bottom of capacitor is not broken.

4. Check that vessel is not swollen or exploded.

5. Check that electrolytic liquid does not blow off.

6. Check that the normal charging characteristics are shown in continuity test by
the tester.

C12 C13 C14

MCC-5009
Soldered

Heat sink IGBT side

C12, C13, C14 → 760µF/400V

2. Completely discharge the four electrolytic capacitors.

3. Remove the diode block from the PCB (which is soldered in place).

4. Use a multimeter with a pointer to test the continuity, and check that the
diode block has the proper rectification characteristics.

+

1

~~

23

123

–

4

surface

~

+ –~

(DBO1)

4

Case that product is good

Pointer swings once, and returns
slowly. When performing test
once again under another
polarity, the pointer should retur n.

Tester rod

+ –

~

2

~

+

3

~

–

4

~

10 to 20 Ω when the multimeter probe
is reversed

Resistance value

in good product

1

2
3

∞

– 80 –

11-10. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

1. Symptom

• Outdoor fan motor does not rotate.

• Outdoor fan motor stops within several tens seconds though it started rotating.

• Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc.
Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”

2. Cause

The following causes are considered when the outdoor fan motor does not normally rotate.

1) Mechanical lock of the outdoor fan motor

2) Winding failure of the outdoor fan motor

3) Position-detect circuit failure inside of the outdoor fan motor

4) Motor drive circuit failure of the outdoor P.C. board

3. How to simply judge whether outdoor fan motor is good or bad

Turn OFF the breaker.

Disconnect two connectors (CN300) of the

outdoor fan motor from the outdoor P.C. board.

Does the fan rotate without trouble

when rotating it with hands?

YES

If the resistance value between
1 (Red lead) – 2 (White lead)
2 (White lead) – 3 (Black lead)
3 (Black lead) – 1 (Red lead)

of the connector
(CN300 : Motor winding)
is 17 to 25Ω, it is normal.

YES

Fan motor is normal.

(Outdoor P.C. board error)

NO

NO

CN300

Fan motor error

NOTE :

However, GND circuit error inside of the motor may be accepted in some cases when the above check is
performed.

When the fan motor does not become normal even if P.C. board is replaced, replace the outdoor fan motor.

– 81 –

12. HOW TO REPLACE THE MAIN PARTS

WARNING

• Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with
the repairs.

Electric shocks may occur if the power plug is not disconnected.

• After the repairs have been completed (after the front panel and cabinet have been installed), perform a
test run, and check for smoking, unusual sounds and other abnormalities.

If this check is omitted, a fire and/or electric shocks may occur.
Before proceeding with the test run, install the front panel and cabinet.

• Ensure that the fo llowing steps are taken when doing repairs on the refrigerating cycle.

1. Do not allow any naked flames in the surrounding area.

If a gas stove or other appliance is being used, extinguish the flames before proceeding.
If the flames are not extinguished, the y may ignite any oil mixed with the refrigerant gas.

2. Do not use welding equipment in an airtight room.

Carbon monoxide poisoning ma y result if the room is not properly ventilated.

3. Do not bring welding equipment near flammable objects.

Flames from the equipment may cause the flammable objects to catch fire .

• If keeping the power on is absolutel y unavoidable while doing a job such as inspecting the cir-

cuitry, wear rubber gloves to avoid contact with the live parts.

Electric shocks may be received if the live parts are touched.
High-voltage circuits are contained inside this unit.

Proceed very carefully when conducting checks since directly touching the parts on the control circuit
board may result in electric shocks.

12-1. Indoor Unit

No.Part name

Front panel

Procedures

1) Stop operation of the air conditioner and
turn off its main power supply.

2) Open the air inlet grille, push the arm
toward the outside, and remove the grille.

3) Remove the left and right air filters, and
remove the electric dust collector.

Remarks

– 82 –

No.Part name

Holder

Protrusion

Electric dust

collector

Holder

Protrusion

Electric dust

collector

Procedures

Remarks

Front panel

4) Press “ ” part under the front panel
and remove hooks of the front panel from
the installation plate.

Installation plate

Front panel

Press

5) Remove the front panel fixing screws.
(2 pcs.)

6) Press the electric parts box with the right
thumb while pulling the both sides of the
front panel toward you.

<How to assemble the front panel>

Electric dust

Holder

Holder

Protrusion

Protrusion

Electric dust

collector

collector

Electric dust

Electric dust

collector

collector

Holder

Holder

Protrusion

Protrusion

1) Press three center positions and two lower center positions of the air outlet, and
then hang the hanging hooks (4 pcs.) at the top side of the front panel to the rear
plate.

2) Insert the electric dust collector and left and right air filters.
Press in the electric dust collector until the protrusions on both sides are completely
inserted into the holders.
If installation is incomplete, the FILTER indicator (orange) may light.

3) Tighten two screws.

• Incomplete hanging or incomplete pressing may cause a dewdrops or generation

of a fluttering sound.

– 83 –

Air ionizer

No.Part name

Procedures

Remarks

High voltage
generator

1) Follow to the procedure in the item .

2) Remove the drain guide.

3) To remove the air ionizer from the back body,
pull it toward you while pressing down on its left
and right claws.

Disconnect the two leads (black) connected to
the air ionizer from where they are fitted into
the other components.
(Caution: do not remove the Faston.)

4) Disconnect the connectors of the high-voltage
generator , and disconnect the four leads from
where they are fitted into the other compo­nents.

5) Remove the fixing screw which secures the
high voltage generator, and remove the high
voltage generator from the evaporator.

<How to assemble the high voltage generator>

1) Insert the high voltage generator straight into
the ev apor ator, and secure it using the fixing
screw.

2) Pass the leads of the high voltage generator
through the area designated and insert them
into its connectors.

3) Attach the air ionizer to the back body, and
pass the two leads (black) through the area
designated on the electric parts box assembly.

4) Attach the drain guide.

– 84 –

No.Part name

TC sensor

Procedures

Remarks

Electric parts
box assembly

1) Follow the procedure up to 4) in  above.

2) Remove screw of earth lead attached to the
end plate of the ev apor ator.

3) Remove the lead wire cover, and remove
connector (5P) for the fan motor and connec­tor (5P) for the louver motor from the electric
parts box assembly.

4) Pull out TC sensor from sensor holder of the
evaporator.

5) Disengage the two claws at the top of the
display unit.
(They can be easily disengaged by pressing
the drain pan above the claws and at the
same time pulling the display unit toward you.)

6) Remove the fixing screw that secures the
electric parts box assembly, and remove the
assembly.

<How to assemble the electric parts box>

1) Hook the top part of the electric parts box
assembly onto the claws on the back body,
and secure it using the fixing screw.
Now attach the display unit. Connect the
connectors for the fan motor and louver motor.

2) Secure the grounding wire using the fixing
screw. Insert the TC sensor into the sensor
holder.

* Be absolutely sure to loop the grounding

wire and TC sensor leads once at the
bottom.

– 85 –

No.

fixing holder

Part name

Procedures

Remarks

Horizontal louver



Evaporator



(Heat exchanger)

1) Remove shaft of the horizontal
louver from the back body.
(First remove the left shaft, and
then remove other shafts while
sliding the horizontal louver
leftward.)

1) Follow to the procedure in the item .

2) Remove the pipe holder from the rear side of the main unit.

3) Remove two fixing screws at the left side of the end plate of the heat exchanger.

4) Remove the heat exchanger fixing holder
by removing the two fixing screws used to
secure it.

5) Remove right side of the end plate from
two fixing ribs while sliding slightly the
heat exchanger rightward.

– 86 –

No.Part name

Procedures

Remarks

Bearing

1) Follow to the procedure in the items .

2) Remove the two fixing screws used to secure
the left edge panel of the heat exchanger, and
remove the two screws used to secure the
bearing base.

3) Raise the left side of the heat exchanger
slightly, and remove the bearing base.

<Caution at assembling>

• If the bearing is out from the housing, push it

into the specified position and then incorporate
it in the main body.

• After assembling the bearing base, check that it

is fitted into the stepped part of the drain pipe.

– 87 –

No.Part name

screw

the fixing screw

the fixing screw

eads

Procedures

Remarks

F an motor

1) Follow to the procedure in the item .

2) Loosen the set screw of the cross flow fan.

3) Remove two fixing screws of the motor band
(Right), and then remove the motor band
(Right).

4) Pull the fan motor outward.
In assembling work, install the fan motor as

follows.

• When assembling the fan motor, the fan

motor must be installed in such a way that
the fan motor leads will be taken out is
positioned at the bottom front.

• After assembling the two hooking claws of

the motor band (right) into the main body,
position the fan motor, insert it, and then
secure the motor band (right) using the two
fixing screws.

Cross flow fan



Fan motor l

1) Follow to the procedure in the item .

2) Remove the heat exchanger fixing holder by
removing the two fixing screws used to
secure it.

3) Loosen the set screw of the cross flow fan.

4) Lift the left side of the heat exchanger, and
pull out the cross flow fan.

– 88 –

No.Part name

Procedures

Remarks

Cross flow fan

<Caution at reassembling>

1) At assembling work of the bearing base,
check that the drain pipe is surely incorpo­rated in the back body.
(Otherwise, water leak is caused.)

2) To incorporate the fan motor, remove the fan
motor rubber (at shaft core side), incorporate
the motor into the position in the following
figure, and then install the fan motor.

Drain pipe

• Install the cross flow fan so that the right

end of the 1st joint from the right of the
cross flow fan is set keeping 70.5 mm from
wall of rear plate of the main unit.

• Holding the set screw, install the cross flow

fan so that U-groove of the fan motor comes
to the mounting hole of the set screw.

Joint

• Perf orm positioning of the fan motor as

follows:

• When assembling the fan motor, the fan

motor must be installed in such a way that
the fan motor leads will be taken out is
positioned at the bottom front.

• After assembling the two hooking claws of

the motor band (right) into the main body,
position the fan motor, insert it, and then
secure the motor band (right) using the two
fixing screws.

U groove

70.5mm

– 89 –

12-2. Microcomputer

No.



Part name

Common procedure

<P.C. board layout>

Procedure

1) Turn the power supply off to stop the
operation of air-conditioner .

2) Remove the front panel.

• Remove the 2 fixing screws .

3) Remove the electrical part base.

R05 L01 C01 CN23 FUSE R04 R01 CN10

Remarks

Replace terminal block,
microcomputer ass’y and the
P.C. board ass’y.

DB01

C03

T01

IC03C20IC01

J04

– 90 –

12-3. Outdoor Unit

e

er

g

g

e

ace

No.Part name

Common
procedure

Procedure

1. Detachment

NOTE

Wear gloves for this job.
Otherwise, you may injure your
hands on the parts, etc.

1) Stop operation of the air conditioner,
and turn off the main switch of the
breaker for air conditioner.

2) Remove the valve co ver.
(ST1TØ4 × 8L 1 pc.)

• After removing screw, remove the

valve co ver pulling it downward.

3) Remove wiring cover (ST1TØ4 × 8L
2 pcs.), and then remove connecting
cable.

4) Remove the upper cabinet.
(ST1TØ4 × 8L 5 pcs.)

• After removing screws, remove the

upper cabinet pulling it upward.

Remarks

Upper cabinet

Water
proof
cover

Valve cover

2. Attachment

1) Attach the water-proof cov e r.

NOTE

The water-proof co ver must be
attached without fail in order to
prevent rain water, etc. from entering
inside the indoor unit.

2) Attach the upper cabinet.
(ST1TØ4 × 8L 5 pcs.)

3) Perform cabling of connecting cable,
and attach the wiring cover.

• Place the wiring cover over the

opening used to work on the con­necting wires of the side cabinet,
and secure it using the two fixing
screws (ST1TØ4 × 8L 2 pcs.).
At this point, the top cushion of the
wiring cover must be on the inside of
the opening.

4) Attach the valve cover.
(ST1TØ4 × 8L 1 pc.)

• Insert the upper part into the square

hole of the side cabinet, set hook
claws of the valve cover to square
holes (at three positions) of the main
unit, and attach it pushing upward.

Insert the bent part
into the rear panel

invert

of th

Align the stitch line
with the top ed
of the front cabinet

How to mount the water-proof cover

e

Bring into contact

Bend downward, and ali
with th

inside surf

of the front cabinet

n

– 91 –

No.Part name

Procedure

Remarks

Front cabinet

1. Detachment

1) Perform step 1 in .

2) Remove the fixing screws (ST1TØ4 × 8L
2 pcs.) used to secure the front cabinet
and inverter cover, the screws (ST1TØ4
× 8L 3 pcs.) used to secure the front
cabinet at the bottom, and the fixing
screws (ST1TØ4 × 8L 2 pcs.) used to
secure the motor base.

• The front cabinet is fitted into the side

cabinet (left) at the front left side so
pull up the top of the front cabinet to
remove it.

2. Attachment

1) Insert the claw on the front left side into
the side cabinet (left).

2) Hook the bottom part of the front right
side onto the concave section of the
bottom plate. Insert the claw of the side
cabinet (right) into the square hole in the
front cabinet.

3) Return the screws that were removed
above to their original positions, and
attach them.the main unit, and attach it
pushing upward.

Front cabinet

Claw

Square
hole

Concave section

– 92 –

No.Part name

eac

eads

r

screw

)

ck

Procedure

Remarks

Inverter
assembly

1) Perform work of item 1 in .

2) Remove screw (ST1TØ4 × 8L 2 pcs.) of the
upper part of the front cabinet.

• If removing the inverter cover in this

condition, P.C. board can be checked.

• If there is no space above the unit, perform

work of 1 in .

Be careful to check the inverter because
high-voltage circuit is incorporated in it.

3) Perform discharging by connecting ,
polarity by discharging resistance (approx.
100Ω40W) or plug of soldering iron to ,
terminals a of the C14 (printed “CAUTION
HIGH VOLT A GE” is attached.) electrolytic
capacitor (760µF) on P.C. board.

Be careful to discharge the capacitor
because the electrolytic capacitor
cannot naturally discharge and voltage
remains according to trouble type in
some cases.

Inverter cover

Discharging position
(Discharging period
10 seconds or more)

A

STIT-4X8MSZN

P. C. board
(Soldered surface)

Plug of
soldering
iron

Terminal blo

NOTE

This capacitor is one with mass capacity.
Therefore, it is dangerous that a large
spark generates if short-circuiting
between , polarity with screwdriver,
etc. for discharging.

4) Remove screw (ST1TØ4 × 8L 2 pcs.) fixing
the main body and the inverter box.

5) Remove the front cabinet b y performing step
1 in , and remove the fixing screws
(ST1TØ4 × 8L) for securing the main body
and inverter box.

6) Remove various lead wires from the holder
at upper part of the inverter box.

7) Pull the inverter box upward.

8) Disconnect connectors of various lead wires.

Requirement

As each connector has a lock mecha­nism, avoid to remove the connector by
holding the lead wire, but by holding the
connector.

Put the compresso
leads through
the hole

The connector is one
with lock, so remove
it while pushing the
part indicated by an
arrow.

Put
through the hole

h l

Be sure to remove the connector by
holding the connector, not by pulling
the lead wire.

– 93 –

No.Part name

Procedure

Remarks

Control board
assembly

1. Disconnect the leads and connectors connected to
the other parts from the control board assembly.

1) Leads

• 3 leads (black, white, orange) connected to
terminal block.

• Lead connected to compressor :
Disconnect the connector (3P).

• Lead connected to reactor :
Disconnect the two connectors (2P).

2) Connectors (×8)
CN300 : Outdoor fan motor (3P: white)*

(See NOTE)
CN701 : 4-way valve (2P: yellow)*
CN600 : TE sensor (2P: white)*
CN700 : PMW (6P: white)
CN603 : TS sensor (3P: white)*
CN601 :TD sensor (3P: white)*
CN602 : TO sensor (2P: white)

NOTE

These connectors have a disconnect prevention
mechanism: as such, the lock on their housing
must be released before the y are disconnected.

CN603

CN601 CN600

CN700 CN602 CN300

CN701

CN300, CN701, CN600 and
CN603 are connectors with
locking mechanisms: as such,
to disconnect them, they must
be pressed in the direction of
the arrow while pulling them
out.

2. Remove the control board assembly from the P.C.
board base. (Remove the heat sink and control
board assembly while keeping them scre wed
together.)

NOTE

Disengage the four claws of the P.C. board base,
hold the heat sink, and lift to remove it.

3. Remove the two fixing screws used to secure the
heat sink and control board assembly.

4. Mount the new control board assembly.

NOTE

When mounting the new control board assembly,
ensure that the P.C. board is inserted properly
into the P.C. board support groove.

P.C. board

P.C. board base

– 94 –

No.Part name

Procedure

Remarks

Side cabinet

1. Side cabinet (right)

1) Perform step 1 in  and all the steps in
.



2) Remove the fixing screw (ST1TØ4 × 8L

5 pcs.) used for securing the side
cabinet to the bottom plate and valve
fixing panel.

2. Side cabinet (left)

1) Perform step 1 in .

2) Remove the fixing screw (ST1TØ4 × 8L

1 pcs.) used to secure the side cabinet
(left) onto the heat exchanger.

3) Remove the fixing screw (ST1TØ4 × 8L

2 pc.) used for securing the side cabinet
to the bottom plate and heat exchanger.

Hook the claw onto
the bottom plate here.

A

B

C

The back body section is hooked
onto the bottom plate here.



F an motor

Detail A Detail B Detail C

1) Perform work of item 1 of  and .

2) Remove the flange nut fixing the fan motor
and the propeller.

• Flange nut is loosened by turning clock-

wise. (To tighten the flange nut, turn
counterclockwise.)

3) Remove the propeller fan.

4) Disconnect the connector for fan motor
from the inverter .

5) Remove the fixing screws (2 pc.) holding
by hands so that the fan motor does not
fall.

* Precautions when assembling the fan

motor
Tighten the flange nut using a tightening
torque of 4.9 N•m.

Propeller fan

Fan motor

Flange nut

– 95 –

No.Part name

Procedure

Remarks

Compressor

1) Perform work of item 1 of  and , , ,
.



2) Extract refrigerant gas.

3) Remove the partition board.

(ST1TØ4 × 8L 3 pcs.)

4) Remove the sound-insulation material.

5) Remove terminal cover of the compressor,

and disconnect lead wire of the compressor
from the terminal.

6) Remove pipe connected to the compressor

with a burner.

• Take care to keep the 4-way valve away
from naked flames. (Otherwise, it may
malfunction.)

7) Remove the fixing screw of the bottom plate
and heat exchanger. (ST1TØ4 × 8L 1 pc.)

8) Remove the fixing screw of the bottom plate
and valve fixing plate .
(ST1TØ4 × 8L 1 pc.)

9) Pull upward the refrigeration cycle.

10) Remove BOLT (3 pcs.) fixing the compres-

sor to the bottom plate.

* Precautions when assembling the com-

pressor.
Tighten the compressor bolts using a
tightening torque of 4.9 N•m.

Partition
board

Compressor

Valve
fixing
plate

Reactor 1) Perform work of item 1 of , and .



2) Remove screws fixing the reactor.
(ST1TØ4 × 8L 4 pcs.)

Reactor

– 96 –

No.

Part name

Procedure

Remarks



Electronic

1. Detachment

expansion valve
coil

2. Attachment

<Handling precaution>

When handling the parts, do not pull the leads.
When removing the coil from the valv e body, use
your hand to secure the body in order to prevent
the pipe from being bent out of shape.

F an guard 1. Detachment



Perform work on a corrugated cardboard,
cloth, etc. to prevent flaw to the pr oduct.

1) Perform step 1 in , all the steps in



and 1 in .

2) Remove the coil by pulling it up from the
electronic control valve body.

1) When assembling the coil into the valve
body, ensure that the coil anti-turn lock is
installed properly in the pipe.

1) Perform work of item 1 of .

2) Remove the front cabinet, and put it down
so that fan guard side directs downw ard.

Coil
anti-turn
lock

Coil anti-turn
lock position

Coil inserting
position

Minus screwdriver

Hooking claw

3) Remove the hooking claws by pushing minus
screwdriver according to the arrow mark in
the right figure, and remove the f an guard.

2. Attachment

1) Insert claws of the fan guard in the holes

of the front cabinet. Push the hooking
claws (9 positions) by hands and fix the
claws.

All the attaching works have completed.
Check that all the hooking claws are fixed
to the specified positions.

– 97 –

No.

11

Part name Procedure Remarks

TE sensor (outdoor heat exchanging temperature sensor)

• Attachment

With the leads pointing downward and the sensor leads
pointing in the direction shown in the figure, install the sensor
onto the straight pipe part of the condenser output pipe.

Detail A

Arrow D

Detail C for 10GAVP-E

TS sensor (Suction pipe temperature sensor)

12

• Attachment

With its leads pointing downward, point the sensor in the
direction of the packed valve, and install it onto the straight
pipe part of the suction pipe.

TD sensor (Discharge pipe temperature sensor)

13

• Attachment

With its leads pointed downward, install the sensor onto the
vertical straight pipe part of the discharge pipe.

TO sensor (Outside air temperature sensor)

14

• Attachment

Insert the outdoor air temperature sensor into the holder, and
install the holder onto the heat exchanger.

Detail C for 13, 16GAVP-E

Detail B

Detail C

• Shown in the above figure is the
model 13GA VP-E.

• The sensor mounting positions
in the model 10GAVP-E are all
the same with the sole excep­tion of the TE sensor. Refer to
the figure shown on the left.

Detail B

TS sensor

Detail A

TD sensor

Arrow D

TO sensor

CAUTION

During the installation work (and on its completion), take care not to damage the coverings of
the sensor leads on the edges of the metal plates or other parts. It is dangerous f or these
coverings to be damaged since damage may cause electric shocks and/or a fire.

CAUTION

After replacing the parts, check whether the positions where the sensors were installed are the
proper positions as instructed. The product will not be controlled properly and trouble will result
if the sensors have not been installed in their proper positions.

– 98 –

No.

Part name

Procedure

Remarks

Replacement of

15

temperature sensor
for servicing only

Common service
parts of sensor TO,
TS, TE, TD

1) Cut the sensor 100 mm longer than old
one.

2) Cut the protective tube after pulling out
it (200 mm).

3) Move the protective tube tow ard the
thermal sensor side and tear the tip of
lead wire in two then strip the covering
part.

4) Pass the stripped part through the
thermal constringent tube.

5) Cut the old sensor 100 mm length on
the connector side, and recycle that
connector.

6) Tear the lead wire in two on the con­nector side and strip the covering part.

7) Twist the leads on the connector and
sensor sides, and solder them.

8) Move the thermal constringent tubes
toward the soldered parts and heat
them with the dryer and constring
them.

9) Wind the attached color tape round the
both terminals of the protective tube
when colored protective tube is used.

10) Fix the sensor again.

Thermal
sensor part

200

Thermal
constringent tube

Cutting here

100

15

70

Winding the color tape

Connector

Soldered part

Dryer

Cutting here

100

Cutting here

15

70

These are parts for
servicing sensors.

Please check that
the accessories
shown in the right
table are pack ed.

NOTE

1) Store the joint part of the sensor and the connector in the electric parts

box.

2) Never joint them near the thermal sensor part. Otherwise it would cause

insulation inferiority because of dew drops.

3) When replacing the sensor using the colored protective tube, wind the

color tape matching the color of that tube.

Parts name

1

Sensor

2

Sensor Spring (A)

3

Sensor Spring (B)

4

Thermal constringent tube

5

Color tape

6

Terminal

Q'ty

1
1
1
3
1
3

Length : 3m
For spare
For spare
Including one spare
9 colors

Remarks

– 99 –

MCC-5009

– 100 –