Toshiba RAS-077SKV-E6,RAS-077SAV-E6, RAS-137SKV-E6,RAS-137SAV-E6, RAS-107SKV-E6,RAS-107SAV-E6 Service Manual
SERVICE MANUAL
Indoor Unit Outdoor Unit
<High Wall, Heat Pump Type> <Heat Pump Type>
FILE NO. SVM-13092-2
SPLIT TYPE
RAS-077SKV-E6 RAS-077SAV-E6
RAS-107SKV-E6 RAS-107SAV-E6
RAS-137SKV-E6 RAS-137SAV-E6
R410A
Revised on Apr, 2014
FILE NO. SVM-13092
CONTENTS
1. SAFETY PRECAUTIONS .......................................................................... 2
2. SPECIFICATIONS ..................................................................................... 4
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 ................................................................ 46
11. HOW TO DIAGNOSE THE TROUBLE...................................................... 59
12. HOW TO REPLACE THE MAIN PARTS................................................... 81
13. EXPLODED VIEWS AND PARTS LIST ................................................... 95
– 1 –
FILE NO. SVM-13092
1. SAFETY PRECAUTIONS
For general public use
Power supply cord of outdoor unit shall be more than 1.5 mm2 (H07RN-F or 60245IEC66) 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.
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.
– 2 –
FILE NO. SVM-13092
• 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 VER Y 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 RESULT 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 cab les 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 before 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.
– 3 –
FILE NO. SVM-13092-2
2. SPECIFICATIONS
2-1. Specification
Unit model Indoor RAS -0 7 7 S KV -E 6 RAS -1 0 7 S KV -E 6
Outdoor RAS -0 7 7 S AV -E 6 RAS -1 0 7 S AV -E 6
Cooling capacity (kW)
Cooling capacity range (kW) 1.2-3.0
Heating capacity (kW) 3.2
Heating capacity range (kW)
Power supply 1Ph/50Hz/220-240V , 1Ph/60Hz/220-230V
Electric Indoor Operation mode Cooling Heating Cooling Heating
characteristic Running current (A) 0.21-0.19 0.24-0.22 0.21-0.19 0.24-0.22
Power consumption (W) 35 40 35 40
Power factor (%) 76 76 76 76
Outdoor Operation mode Cooling Heating Cooling Heating
Running current (A) 2.93-2.69 3.19-2.93 3.67-3.36 3.95-3.62
Power consumption (W) 505 550 735 800
Power factor (%) 78 78 91 92
Starting current (A)
COP (Cooling / Heating) 3.70/4.24 3.25-3.81
Operating Indoor High (Cooling / Heating) (dB-A) 38/39 40/41
noise Medium (Cooling / Heating) (dB-A) 32/33 34/35
Low (Cooling / Heating) (dB-A) 26/27 27/28
Outdoor (Cooling / Heating) (dB-A) 47/49 48/50
Indoor unit Unit model RAS -0 7 7 S KV -E 6 RAS -1 0 7 S KV -E 6
Dimension Height (mm) 275 275
Width (mm) 790 790
Depth (mm) 205 205
Net weight (kg) 9 9
Fan motor output (W) 20 20
Air flow rate (Cooling / Heating)
Outdoor unit Unit model RAS -0 7 7 S AV -E 6 RAS -1 0 7 S AV -E 6
Dimension Height (mm) 530 530
Width (mm) 660 660
Depth (mm) 240 240
Net weight (kg) 28 28
Compressor Motor output (W) 750 750
Type
Model ASM89D16UEZ
Fan motor output (W) 43
Air flow rate (Cooling / Heating)
Piping Type Flare connection
connection Indoor unit Liquid side (mm)
Gas side (mm)
Outdoor unit Liquid side (mm)
Gas side (mm)
Maximum length (m) 15 15
Maximum charge-less length (m) 15 15
Maximum height difference (m) 8 8
Refrigerant Name of refrigerant R410A R410A
Weight (kg) 0.63 0.63
Wiring Power supply 3 Wires: Includes earth (Outdoor)
connection Interconnection 4 Wires: Includes earth
Usable temperature range Indoor (Cooling / Heating)
Outdoor (Cooling / Heating)
* The specification may be subject to change without notice for purpose of improvement.
(m3 / min)
Twin rotary type with DC-inverter variable speed control to Single
rotary type with DC-inverter variable speed control
(m3 / min)
(oC)
(oC)
2.0 2.5
1.2-2.3
2.5
0.9-2.9
3.14 3.43 3.88
8.3/8.8 8.8/9.5
27/27 29/29
6.35 6.35
9.52 9.52
6.35 6.35
9.52 9.52
21-32/0-28 21-32/0-28
-10-46/-15-24 -10-46/-15-24
0.9-3.5
4.19
– 4 –
FILE NO. SVM-13092-2
2-2. Specification
Unit model Indoor RAS -1 3 7 S KV -E 6
Outdoor RAS -1 3 7 S AV -E 6
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply 1Ph/50Hz/220-240V , 1Ph/60Hz/220-230V
Electric Indoor Operation mode Co o ling H ea ting
characteristic Running current (A) 0.21-0.19 0.24-0.22
Power consumption (W) 35 40
Power factor (%) 76 76
Outdoor Operation mode Cooling Heating
Running current (A) 5.16-4.72 4.46-4.08
Power consumption (W) 1065 910
Power factor (%) 94 93
Starting current (A)
COP (Cooling / Heating) 2.86/3.79
Operating Indoor High (Cooling / Heating) (dB-A) 41/42
noise Medium (Cooling / Heating) (dB-A) 35/36
Low (Cooling / Heating) (dB-A) 28/29
Outdoor (Cooling / Heating) (dB-A) 48/50
Indoor unit Unit model RAS -1 3 7 S KV -E 6
Dimension Height (mm) 275
Width (mm) 790
Depth (mm) 205
Net weight (kg) 9
Fan motor output (W) 20
Air flow rate (Cooling / Heating)
Outdoor unit Unit model RAS -1 3 7 S AV -E 6
Dimension Height (mm) 530
Width (mm) 660
Depth (mm) 240
Net weight (kg) 28
Compressor Motor output (W) 750
Type
Model ASM89D16UEZ
Fan motor output (W) 43
Air flow rate (Cooling / Heating)
Piping Type Flare connection
connection Indoor unit Liquid side (mm)
Gas side (mm)
Outdoor unit Liquid side (mm)
Gas side (mm)
Maximum length (m) 15
Maximum charge-less length (m) 15
Maximum height difference (m) 8
Refrigerant Name of refrigerant R410A
Weight (kg) 0.63
Wiring Power supply 3 Wires: Includes earth (Outdoor)
connection Interconnection 4 Wires: Includes earth
Usable temperature range Indoor (Cooling / Heating)
Outdoor (Cooling / Heating)
* The specification may be subject to change without notice for purpose of improvement.
(m3 / min)
(m3 / min)
(oC)
(oC)
5.37 4.70
Twin rotary type with DC-inverter variable speed control to Single
rotary type with DC-inverter variable speed control
3.15
1.2-3.6
3.6
0.95-4.0
9.5/9.8
31/31
6.35
9.52
6.35
9.52
21-32/0-28
-10-46/-15-24
– 5 –
FILE NO. SVM-13092
– 6 –
3. REFRIGERANT R410A
FILE NO. SVM-13092
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. b y 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 concentration
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 may 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. Ne ver 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)
FILE NO. SVM-13092
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 ma y 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
FILE NO. SVM-13092
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
Table 3-2-4 Dimensions related to flare processing for R22
Outer
diameter
(mm)
6.35
9.52
12.70
15.88
0.8
0.8
0.8
1.0
Thickness
(mm)
0.8
0.8
0.8
1.0
0 to 0.5
0 to 0.5
0 to 0.5
0 to 0.5
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
FILE NO. SVM-13092
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 b y 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)
FILE NO. SVM-13092
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 f or 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 for 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 –
FILE NO. SVM-13092
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.
(Indoor 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 –
FILE NO. SVM-13092
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 ]
Refrigerant
cylinder
Gauge manifold
OUTDOOR unit
Refrigerant
cylinder
Gauge manifold
OUTDOOR unit
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 alloy 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 oxide film and any foreign
matter on the metal surface, it assists the flow
of brazing filler .
• In the brazing process, it prevents the metal
surface from being oxidized.
• 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 effectiv e temper ature range, flux
is hard to carbonize.
• It is easy to remove 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
FILE NO. SVM-13092
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 brazing.
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 w ater
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. CONSTRUCTION VIEWS
FILE NO. SVM-13092
4-1. Indoor Unit
Front panel
63
7
48
Knock out system
275
Air filter
Heat exchanger
Air inlet
790
62
69
205
Knock out system
49
48
63
7
116
Installation plate hanger
Connecting pipe (0.35m)
Flare
84.5
Minimum
distance
to wall
275
170 or more
Installation plate hanger
9.52mm)
235
215
Hanger
621
Drain hose (0.40m)
Connecting pipe (0.40m)
(Flare 6.35mm)
235
215
Minimum
distance
to ceiling
65 or more
193480
84.5
Minimum
distance
to wall
170 or more
110
58
17.5
Wireless remote controller
64.5
73.5
25
Remote controller holder
45
190
40
Hanger
84.5 150 84.5
160.5 160.5 150
Center line
– 15 –
40
Hanger
Installation plate outline
4-2. Outdoor Unit
FILE NO. SVM-13092
C
L
C
L
280
400
– 16 –
5. WIRING DIAGRAM
FILE NO. SVM-13092
COMPRESSOR
CM
212
3
P09
RED
1
P10
WHI
P11
BLK
3
6
6
5
5
4
4
PMV
3
IPM module
DB01
C08
C07
F02
FUSE
3.15A
SURGE
ABSORBER
COIL
FOR
4WAY
VALVE
VARISTOR
P03
ORN
21 NL
F01
FUSE
25A
3
(From Main Line)
2
1
CN63
CN62
3
2
1
3
3
2
1
1
TS
(SUCTION PIPE
TEMP. SENSOR)
2
2
1
1
TO
(OUTDOOR
TEMP. SENSOR)
3
3
2
1
1
TD
(DISCHARGE PIPE
TEMP. SENSOR)
1
2
3
4
5
6
7
8
9
WP-027
10
10
11
11
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
10
11
YEL
– 17 –
6-1. Indoor Unit
FILE NO. SVM-13092
6. SPECIFICATIONS OF ELECTRICAL PARTS
No. Parts name Type Specifications
1
Fan motor
2 Room temp. sensor (TA-sensor) ( - ) 10kΩ at 25°C
3 Heat exchanger temp. sensor (TC-sensor) ( - ) 10kΩ at 25°C
4 Louver motor 24BYJ48-HTP Output (Rated) 1W, 16 poles, DC12V
(for indoor)
RPG-240-25A
AC 240V, 25W
6-2. Outdoor Unit
No. Parts name Type Specifications
1
Reactor
2 Outdoor fan motor ICF-140-43-4R DC140V, 43W
3 Suction temp. sensor (TS sensor) (Inverter attached) 10kΩ (25°C)
4 Discharge temp. sensor (TD sensor) (Inverter attached) 62kΩ (20°C)
5 Outside air temp. sensor (TO sensor) (Inverter attached) 10kΩ (25°C)
6 Heat exchanger temp. sensor (TE sensor) (Inverter attached) 10kΩ (25°C)
Terminal block (5P)7
Compressor
8
COIL FOR P.M.V.
9
CH-69-Z-T
ASM89D16UEZ
PQ-M01012-000082
L = 19mH, 10A
20A, AC250V
3-phases 4-poles 750W
DC12V
Coil for 4-way valve
10
SQ-A2522G-000352
AC220-240V
– 18 –
7. REFRIGERANT CYCLE DIAGRAM
7-1. Refrigerant Cycle Diagram
RAS-077SKV-E6 / RAS-077SAV-E6
RAS-107SKV-E6 / RAS-107SAV-E6
INDOOR UNIT
Indoor heat
exchanger
T1
Temp. measurement
TC
FILE NO. SVM-13092
P
Pressure measurement
Gauge attaching port
Vacuum pump connecting port
Deoxidized copper pipe
Outer dia. : 9.52mm
Thickness : 0.8mm
4-way valve
TS
Muffler
Muffler
Compressor
ASM89D16UEZ
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 100
TA
Allowable height
difference : 10m
Pulse Modulating
valve at liquid side
Strainer
Max. : 15m
Min. : 2m
Chargeless : 15m
Allowable pipe length
Temp. measurement
T2
Ø1.2 x 100
TE
Propeller fan
OUTDOOR UNIT
NOTE :
– 19 –
Refrigerant amount : 0.63kg
Gas leak check position
Refrigerant flow (Cooling)
Refrigerant flow (Heating)
RAS-137SKV-E6 / RAS-137SAV-E6
INDOOR UNIT
Indoor heat
exchanger
T1
Temp. measurement
TC
FILE NO. SVM-13092
P
Pressure measurement
Gauge attaching port
Vacuum pump connecting port
Deoxidized copper pipe
Outer dia. : 9.52mm
Thickness : 0.8mm
4-way valve
TS
Muffler
Muffler
Cross flow fan
Deoxidized copper pipe
Outer dia. : 6.35mm
Thickness : 0.8mm
Sectional shape
of heat insulator
TD
Compressor
ASM89D16UEZ
TA
Allowable height
difference : 10m
Pulse Modulating
valve at liquid side
Strainer
Max. : 15m
Min. : 2m
Chargeless : 15m
Allowable pipe length
Temp. measurement
T2
Outdoor heat
exchanger
TO
TE
Propeller fan
OUTDOOR UNIT
NOTE :
– 20 –
Refrigerant amount : 0.63kg
Gas leak check position
Refrigerant flow (Cooling)
Refrigerant flow (Heating)
7-2. Operation Data
<Cooling>
FILE NO. SVM-13092
Tempeature Heat exchanger
condition(°C)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps)
27/19 35/- 077SKV-E6 0.9 to 1.1 13 to 14 45 to 46 High
Model name Standard Indoor Outdoor Compressor
RAS- pressure fan mode fan mode revolution
107SKV -E6 0.9 to 1.0 11 to 12 48 to 49 High High 53
137SKV -E6 0.8 to 1.0 10 to 11 48 to 49 High High 75
pipe temp.
High 40
<Heating>
Tempeature Heat exchanger
condition(°C)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps)
20/- 7/6 077SKV-E6 2.4 to 2.5 36 to 37 0 to 1 High High 51
Model name Standard Indoor Outdoor Compressor
RAS- pressure fan mode fan mode revolution
107SKV -E6 2.4 to 2.5 40 to 41 0 to 1 High High 67
137SKV -E6 2.8 to 2.9 41 to 42 0 to 1 High High 75
pipe temp.
NOTES :
1. Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent.
(Thermistor themometer)
2. Connecting piping condition : 5 m
– 21 –
8-1. Indoor Unit
Heat Exchanger Sensor
8. CONTROL BLOCK DIAGRAM
Indoor Unit Control Panel
M.C.U
Functions
• Louver Control
FILE NO. SVM-13092
Operation
Display
Temperature Sensor
Infrared Rays Signal Receiver
Initiallizing Circuit
Infrared
Rays
36.7KHz
Clock Frequency
Oscillator Circuit
Power Supply
Remote
Control
Noise Filter
Power Supply
(From Outdoor Unit)
Circuit
•
3-minute Delay at Restart for Compressor
•
Motor Revolution Control
•
Processing
(Temperature Processing)
•
Timer
•
Serial Signal Communication
Louver ON/OFF Signal
Louver Driver
Serial Signal Transmitter/Receiver
Serial Signal Communication
Timer
Display
Indoor
Fan Motor
Louver Motor
REMOTE CONTROL
Infrared Rays
Remote Control
Operation ( )
Operation Mode Selection
AUTO, COOL, DRY, HEAT, FAN ONLY
Temperature Setting
Fan Speed Selection
OFF TIMER Setting
Louver Auto Swing
Louver Direction Setting
ECO
Hi-POWER
– 22 –
8-2. Outdoor Unit (Inverter Assembly)
detect
Current
circuit
Gate drive
detect
Current
FILE N. SVM-13092
Compressor
Outdoor
Fan motor
Inverter
(DC → AC)
P.M.V. : Pulse Motor Valve
M.C.U. : Micro Control Unit
MICRO-COMPUTER BLOCK DIAGRAM
M.C.U
WP-030 (P.C.B) OUTDOOR UNIT
• PWM synthesis function
• Input current release control
circuit
Indoor unit
send/receive
circuit
Gate drive
• IGBT over-current detect control
• Outdoor fan control
• High power factor correction control
• Inverter output frequency control
• A/D converter function
• P.M.V. control
• Discharge temp. control
• 4-way valve control
• Signal communication to indoor unit
4MHz
Clock
frequency
circuit
High Power
factor Correction
Converter
(AC → DC)
sensor
Input current
Filter
Noise
Inverter
(DC → AC)
Relay
circuit
of P.M.V.
Driver circuit
valve
4-way
P.M.V.
230V ~60Hz
−
220
220–240V ~50Hz
For INDOOR UNIT
Discharge
temp. sensor
Outdoor air
temp. sensor
Suction temp.
– 23 –
sensor
temp.sensor
Heat exchanger
9. OPERATION DESCRIPTION
FILE NO. SVM-13092
9-1. Outline of Air Conditioner Control
This air conditioner is a capacity-variable type air
conditioner, which uses AC or DC motor for the indoor
for motor and the outdoor fan motor. And the capacityproportional control compressor which can change the
motor speed in the range from 11 to 96 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 Modulating 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 perfor ms 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 transferr ing 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 –
FILE NO. SVM-13092
9-2. Operation Description
1. Basic operation ........................................................................................................... 26
1. Operation control ................................................................................................... 26
2. Cooling/Heating operation ..................................................................................... 27
3. AUTO operation .....................................................................................................
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. Defrost control (Only in heating operation) ................................................................ 33
8. Louver control ............................................................................................................. 34
1) Louver position....................................................................................................... 34
2) Air direction adjustment ......................................................................................... 34
3) Swing ..................................................................................................................... 34
9. ECO operation ............................................................................................................ 35
10. Temporary operation................................................................................................... 36
11.
Discharge temperature control ................................................................................... 36
12.
Pulse Modulating valve (P.M.V.) control ..................................................................... 37
13.
Self-Cleaning function ................................................................................................ 38
14.
Remote-A or B selection ............................................................................................ 39
15.
Hi-POWER Mode ...................................................................................................... 40
27
9-3. Auto Restart Function ..
9-3-1. How to Set the A uto Restart Function .............................. ........................................ 41
9-3-2. How to Cancel the Au to Restar t Function ................................................................. 42
9-3-3. Power Failure During Timer Operation .................................................................... 42
9-4. Remote Controller and Its Fuctions
9-4-1. Parts Name of Remote Contr oller .............................................................................. 44
9-4-2. Operation of remote control ...................................................................................... 44
9-4-3. Name and Functions of Indications on Remote Contr oller ........................................ 45
– 25 -
FILE NO. SVM-13092
Item
1. Basic
operation
Operation flow and applicable data, etc.
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 Modulating valve.
Selection of
operation conditions
ON/OFF
Description
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
• Hi-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 Modulating valve
(P.M.V.)
– 26 –
FILE NO. SVM-13092
Item
1. Basic
operation
Operation flow and applicable data, etc.
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 Modulating valve and
4-way valve according to the operation signal sent from the indoor unit.
Operation ON
Indoor unit control
Sending of operation command signal
Outdoor unit control
Setup of remote controller
Indoor fan motor control / Louver control / Operation Hz
Control (Requierment)
Compressor revolution control / Outdoor fan motor control /
Operation Hz control (Include limit control)
4-way valve control In cooling operation:
In heating operation:
Pulse Modulating valve control
[ ]
Description
OFF
ON
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
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 lower ing of the room temperature and to avoid air
flow from blowing directly to persons.
[˚C]
Ta
L– (W5)
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.
1) Detects the room temperature (Ta) when
the DRY operation started.
2) Star ts 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.
+
+
Tsc
1.0
0.5
(W5+W3) / 2
SUL (W3)
Fan speed
− 27 −
FILE NO. SVM-13092
Item
2. Indoor fan
motor control
COOL ON
Fan speed setup
AUTO
Ta
[˚C]
+2.5
a
+2.0
b
+1.5
c
+1.0
Operation flow and applicable data, etc.
<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
Description
* 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.
+0.5
Tsc
d
e
L(W6)
(Linear approximation
from M+ and L)
(Table 1) Indoor fan air flow rate
Fan speed
level COOL HEAT DR
WF UH 1150 534 1200 565 1250 596
WE H 1150 534 1200 565 1250 596
WD UH M+ 1150 534 1200 565 1250 596
WC H 1100 502 1150 534 1200 565
WB M+ 950 409 1000 440 1050 471
WA 409
W9 M L+ 850 347 900 378 950 409
W8 L 700 253 750 284 800 316
W7 L+ L- L+ 650 222 700 253 750 280
W6 L L 650 222 700 253 750 280
W5 L- UL L- 600 191 650 222 700 253
W4 UL UL 580 179 620 203 650 222
W3 SUL SUL 550 160 580 179 600 191
W2 SUL 520 141 520 141 520 141
W1 500 129 500 129 500 129
Y
Fan speed Air flow rate Fan speed Air flow rate Fan speed Air flow rate
(rpm) (m3/h) (rpm) (m3/h) (rpm) (m3/h)
UH
H
M
M+
M
900
378
RAS-107SKV-E6 RAS-137SKV-E6RAS-077SKV-E6
950
1000 440
– 28 –
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
FILE NO. SVM-13092
Item
2. Indoor fan
motor control
HEAT
Fan speed setup
AUTO
TC ≥ 42˚C
NO
Operation flow and applicable data, etc.
<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
Description
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.
5) In order to prevent Cold draft when
compressor step during heating
operation. Then louver will move to
upper position and fan speed will
reduce or off.
*Fan speed=
TC
Fan spee
AUT
L+ (W9)
*1
*2
*3
M+ (WD)
H (WE
Basic fan contr
A
TS
–0.
d
–1.0
e
–1.5
f
–2.0
g
–2.5
–5.0
(Fig. 4)
*1: Fan speed = (M + -L+) x 1 4 + L+
*2: Fan speed = (M + -L+) x 2 4 + L+
*3: Fan speed = (M + -L+) x 3 4 + L+
(Calculated with linear approximation from M+ and L+)
(Fig. 5)
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 –
FILE NO. SVM-13092
Item
3. Outdoor fan
motor control
1) Outdoor unit
operation command
(Outdoor fan control)
when the motor stopped.
Operation flow and applicable data, etc.
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
Description
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)
To > 38°C
To > 28°C
To To > 15°C
To > 5.5°C
To > 0°C
To
°C f 0 f 0 f 0 f 1 f 1 f 2
< 0
During
ECO mode
When To is abnormal
Tap
f 0 0 0
f 1
f 2
f 3
f 4
f 5
f 6
f 7
f 8
To > 38°C
To < 38°C
RAS-077SAV-E6
300 300
350 350
400 400
450 450
500 500
550 550
600 600
700 700
~ 13.8 ~ 31.7
MIN MAX MIN MAX MIN MAX
f 2 f 3 f C f D f E f F
f 2 f 3 f A f C f D f F
f 2 f 3 f 7 f A f 9 f C
f 1 f 3 f 2 f 5 f 4 f 7
f 1 f 1 f 1 f 2 f 2 f 4
f 2 f 3 f B f C f C f D
f 2 f 3 f 2 f 3 f B f C
f D f F f D f F f F
RAS-107SAV-E6,
YES
Air conditioner
OFF
32.3 ~ MAX
f D
Alarm
display
Compressor speed (rps)
To
During
ECO mode
When To is abnormal
Outdoor fan speed (rpm)
RAS
-137SAV-E6
Tap
f 9
f A
f B
f C
f D
f E
f F
RAS-077SAV-E6
In Heating operation
~16.8 ~47.9
To > 15°C
To < 15°C
To < 5.5°C
To < − 5.0°C
To > 15°C
To < 15°C
To < 5.5°C
To < − 5.5°C
750 750
800 800
800 850
800 850
800 850
800 850
800 850
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
RAS-107SAV-E6, RAS-137SAV-E6
48.5 ~ MAX
– 30 –
FILE NO. SVM-13092
Item
4. Capacity
control
Remote controller Indoor unit
Operation flow and applicable data, etc.
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.
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)
Description
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.
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
Reduce compressor speed
Current decrease
Cooling current release value Heating current release value
RAS-077,107,137SAV-E6
RAS-077,107,137SAV-E6
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.
45°C 5.1A
40°C 44°C 5.7A
16°C 39°C 7.2A
11°C 15.5°C
10.5°C 7.2A
– 31 –
7.2A
7.2A
FILE NO. SVM-13092
Item
6. Release protective
control by temperature of indoor heat
exchanger
7˚C
6˚C
5˚C
Indoor heat exchanger temperature
Operation flow and applicable data, etc.
<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
Description
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
52˚C
48˚C
Indoor heat exchanger temperature
<In heating operation>
(Prevent-overpressure 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 52°C to 55°C, the
compressor speed is kept.
(Q zone)
When temperature of the indoor
heat exchanger drops in the
range from 48°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
52°C, or when it drops below to
48°C, the capacity control
operation returns to the usual
control in heating operation.
(R zone)
– 32 –
FILE NO. SVM-13092
Item
7. Defrost control
(Only in heating
operation)
Start of heating operation
TE [˚C]
0 10 15 90
(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.
–2
–5
–10
–25
Operation flow and applicable data, etc.
∗
Description
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)
3529
A zone
zone
A
zoneB zone
B
C
zoneC zone
[min.]
D zoneD zone
Table 1
A zone
B zone
C zone
D zone
∗ The minimum TE value and To value between 10 and 15 minutes after heating operation has
started are stored in memory as TE0 and To0, respectively.
In normal To In abnormal To
TE0-TE≥3°C & SH-SH0≤2 (TE0-TE)-(TO0-TO)≥3°C & SH-SH0≤2
TE0-TE≥2°C & SH-SH0≤2 (TE0-TE)-(TO0-TO)≥2°C & SH-SH0≤2
TE≤ –25°C & SH-SH0≤2
More than 90 minutes accumulated heating operation time condition TE≤ -2°C
<Defrost operation>
• Defrost operation in A to C zones
1) Stop operation of the compressor for
40 seconds.
2) Invert (OFF) 4-way valve 40 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 for 3 seconds.
2) Temper ature of outdoor heat exchanger
is kept at +7°C or higher for 60 seconds.
3) Defrost operation continues for
10 minutes.
<Returning from defrost operation>
1) Stop operation of the compressor for
approx. 40 seconds.
2) Invert (ON) 4-way valve approx. 30
seconds after stop of the compressor.
3) The outdoor fan starts rotating at the
same time when the compressor starts.
– 33 –
FILE NO. SVM-13092
Item
8. Louver control
1) Louver
position
Operation flow and applicable data, etc.
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 memory by the microcomputer,
and the louver returns to the stored position when the next operation
is performed. (Cooling/Heating memory position)
The angle of the louver is indicated as the louver closes fully is 0°.
1) Louver position in cooling operation
Initial setting of "Cooling storage position"
Louver : Directs downward (35.3°)
2) Louver position in heating operation
Description
2) Air direction adjustment
Horizontal
blowing
3) Swing
• Swing operation is perfor in range 35° with the Fixed position as
the center.
• If the swing range exceeded either upper or lower limit position,
swing operation is perfomed in range 35° from the limit.
Heating operation/
AUTO (HEAT)
Initial setting of “Heating storage position”
Louver : Directs downward (80.5˚)
Air direction
Inclined
blowing
Blowing
downward
Inclined
blowing
• The louver position can
be arbitrarily set up by
pressing [FIX] button.
Horizontal
blowing
• Swing
When pressing
[SWING] button during
operation, the louver
starts swinging.
Upper Limit
Position.
Swing
o
range 35
Fixed Position
before start
swing.
o
17.5
17.5
Lower Limit
Position.
Upper Limit
Position.
Fixed
o
Position
before start
swing
Swing
range 35
o
5
o
30
o
Lower Limit
Position
– 34 –
FILE NO. SVM-13092
Item
9. ECO
operation
+5.5
+4.5
+4.0
+1.5
+1.0
TSC
-0.5
+6.5
+6.0
+5.0
+3.5
+3.0
+2.5
+2.0
+0.5
-1.0
-2.0
Operation flow and applicable data, etc.
When pressing [ECO] button on the remote controller, a
Economic operation is performed.
<Cooling operation>
This function operates the air conditioner with the difference
between the set and the room temperature as shown in the
following figure.
Frequency
Zone
12
Dry Max
11
*12
*11
10
*10
9
*
8
7
*8
6
5
4
3
2
Min
1
Hz
OFF
1H 2H
3H
4H
Time
Description
<Cooling operation>
1) The control target temperature
increase 0.5ºC per hour up to 2ºC
starting from the set temperature
when ECONO has been received.
2) The indoor fan speed is depend
on presetting and can change
FAN
every speed after setting ECO
operation.
3) The compressor speed is
controlled as shown in the left
figure.
Fan speed depend on presetting and can change every speed.
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
Hz 077SKV-E6 107SKV-E6 137SKV-E6
Cool min
DRY max
20 20 20
35 35 37
<Heating operation>
30 minutes
A
B
C
→ Time Compressor
A
B
C
speed
0Hz
A zone
aHz
B zone
a to cHz
C zone
cHz
<Heating operation>
1) Setting the compressor speed to
Max. aHz, the temperature zone
in which the operation can be
performed with Max. cHz is
gradually widened after 30
minutes passed when starting
ECO operation.
2) The indoor fan speed is depend
on presetting and can change
every speed after setting ECO
operation.
Hz 077SKV-E6 107SKV-E6 137SKV-E6
a
c
20 20 20
52 52 52
– 35 –
FILE NO. SVM-13092
Item
10. Temporary
operation
Operation flow and applicable data, etc.
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.
1) When pressing [RESET] button, the
temporary [AUTO] operation starts.
2) When keeping [RESET] button pressed
for 3 seconds or more, Pi, Pi, Pi sound is
heard and [AUTO RESTART] control is
changed.
Press RESET button.
3) When keeping [RESET] button pressed
for 10 seconds or more, “Pi” sound is
heard and the temporary [COOL]
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.
NO
Temporary [AUTO] operation
YES
Temporary [COOL] Operation
operation starts.
4) To stop the temporary operation, press
the button again.
11. Discharge temperature control 1. Purpose
Td value
117°C
115°C
103°C
100°C
93°C
Control operation
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.
This function detects error on the
refrigerating cycle or error on the compressor, and performs 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.
Description
– 36 –
FILE NO. SVM-13092
Item
12. Pulse
Modulating
valve (P.M.V.)
control
SH control
Operation flow and applicable data, etc.
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 Modulation.
Starting up
Initialize
Move to
initial position
Compressor ON
Td
release control
Description
1) When star ting 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 Modulating Valve
Defrost
– 37 –
FILE NO. SVM-13092
Item
Operation flow and applicable data, etc.
13. Self-Cleaning
function
Unit now performing cooling or dry operation
Press “STOP” button
Only timer indicator lights, and Self Cleaning operation starts
Time set now elapses
Operation stops
Description
1. Purpose
The Self-Cleaning 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.
Self-Cleaning operation
When the cooling or dry operation shuts
down, the unit automatically starts the SelfCleaning 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
Self-Cleaning operation stops.
(The Self-Cleaning operation is not
performed after a heating operation.)
2. Operation
1) When the stop signal from the remote
controller or timer-off function is received,
only the timer indicator light.
2) The period of the Self-Cleaning operation
is determined by the duration of the
operation performed prior to the
reception of the stop code.
3) After the Self-Cleaning operation has
been performed for the specified period,
the unit stops operating.
• During Self-Cleaning operations: The louver opens
slightly. The indoor fan operates continuously at
a speed of 500 rpm.
Self-Cleaning operation times
Self-Cleaning operation time
No Self-Cleaning operation
performed (0 minutes)
30 mins.
Cooling: Auto (cooling) Dry
Heating: Auto (heating)
Auto (fan only)
Shutdown
Operation time
Up to 10 minutes
10 minutes
or longer
No Self-Cleaning operation performed
• To stop an ongoing Self-Cleaning operation at any time
Press the start/stop button on the remote controller twice during the Self-Cleaning
operation. (After pressing the button for the first time, press it for the
second time without delay (within 10 minutes).)
– 38 –
FILE NO. SVM-13092
Item
13. Self-Cleaning
• Self-Cleaning diagram
Operation flow and applicable data, etc.
Description
function
Operation display ON OFF OFF
FCU fan
FCU louver OPEN OPEN (12.7º) CLOSE
Timer display
Compressor
CDU fan ON or OFF
14. Remote-A or B
selection
rpm is depend on presetting. (500RPM)
depend on presetting of timer function. depend on presetting of timer function.
depend on presetting per room temperature.
depend on presetting per room temperature.
Cool mode or dry mode
operation more than 10 mins.
Setting the remote controller
To separate using of remote control for each indoor
unit in case of 2 air conditioner are installed nearly.
Remote Control B Setup.
1) Press RESET button on the indoor unit to turn
the air conditioner ON.
2) Point the remote control at the indoor unit.
3) Push and hold CHK • button on the Remote
Control by the tip of the pencil. "00" will be shown
shown on the display.
4) Press MODE • during pushing CHK • . "B" will
show on the display and "00" will disappear and
the air conditioner will turn OFF. The Remote
Control B is memorized.
ON ON
ON or OFF
ON or OFF
Turn off by remote controller or
timer-off function.
ON
OFF OFF
OFF OFF
Self-Cleaning mode
operate 30 mins.
Automatically turn-off.
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 control-
Note : 1. Repeat above step to reset Remote Control
to be A.
2. Remote Control A has not "A" display.
3. Default setting of Remote Control from
ler 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.)
factory is A.
OFF
ON or OFF
Operation time
12
− 39 −
FILE NO. SVM-13092
Item
15. Hi-POWER
Mode
Operation flow and applicable data, etc.
([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 1ºC
(The value of the preset temperature on the
remote controller does not change.)
The indoor unit's fan speed level increase 1 tap
3. Heating operation
• The preset temperature increases 2ºC
(The value of the preset temperature on the
remote controller does not change.)
The indoor unit's fan speed level increase 1 tap
4. The Hi-POWER mode can not be set in Dry
operation
Description
− 40 −
.
FILE NO. SVM-13092
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 Restart 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)
RESET
RESET button
• 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
RESET button
RESET
once more or use the remote controller to turn it on.
• While the filter check indicator is on, the RESET button has the function of filter reset betton.
– 41 –
FILE NO. SVM-13092
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)
RESET
RESET button
• 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.
The unit beeps three times.
If the unit is required to operate at this time, press [RESET] button
RESET button
RESET
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 Daily Timer is reset while a command signal
can be received from the remote controller even if it
stopped due to a power failure .
↓ After approx. three seconds,
– 42 –
5. ECO OPERATION
To automatically control room to save energy (except in DRY and FAN ONLY mode)
Press : Start and stop the operation.
Note: Cooling operation; the set temperature will increase automatically 1 degree/
hour for 2 hours (maximum 2 degrees increase). For heating operation the
set temperature will decrease.
6. TEMPORARY OPERATION
In case of the misplaced or discharged remote control
· Pressing the RESET button, the unit can start or stop
without using the remote control.
· Operation mode is set on AUTOMATIC
operation, preset temperature is 25°C
and fan operation is automatic speed.
7. AUTO RESTART OPERATION
To automatically restart the conditioner after the power failure (Power of the unit
must be on.)
Setting
1. Press and hold the RESET button on the indoor unit for 3 seconds to set the
operation. (3 beep sound and OPERATION lamp blink 5 time/sec for 5 secpmds)
· Do not operate ON timer and OFF timer.
2. Press and hold the RESET button on the indoor unit for 3 seconds to cancel the
operation. (3 beep sound but OPERATION lamp does not blink)
FILE NO. SVM-13092
– 43 –
9-4. Remote Controller and Its Fuctions
9-4-1. Parts Name of Remoe Controller
FILE NO. SVM-13092
1
Infrared signal emitter
Start/Stop button
2
3
Mode select button (MODE)
4
Temperature button (TEMP)
5
Fan speed button (FAN)
6
Swing louver button (SWING)
7
Set louver button (FIX)
8
Off timer button (OFF)
9
High power button (Hi-POWER)
10
18
Economy button (ECO)
11
19
Clear button (CLEAR)
12
Check button (CHECK)
9-4-2. Operation of remote control
1. AUTOMATIC OPERATION
To automatically select cooling, or fan only operation.
1. Press : Select A.
MODE
12
1
3
2
7
9
8
4
6
5
10
11
2. Press : Set the desired temperature.
3. Press : Select AUTO, LOW , LOW+ , MED , MED+ , or
FAN
HIGH .
2. COOLING / HEATING / FAN ONLY OPERATION
To automatically select cooling, or fan only operation.
1. Press : Select Cool , Heat , or Fan only .
MODE
2. Press : Set the desired temperature.
Cooling / Heating : Min 17°C - Max 30°C, Fan Only: No temperature indication
3. Press : Select AUTO, LOW , LOW+ , MED , MED+ , or
FAN
HIGH .
3. DRY OPERATION (COOLING ONLY)
For dehumidification, a moderate cooling performance is controlled automatically.
1. Press : Select Dry .
MODE
2. Press : Set the desired temperature.
4. Hi-POWER OPERATION
To automatically control room temperature and airflow for faster cooling or heating
operation (except in DRY and FAN ONLY mode)
Press : Start and stop the operation.
– 44 –
9-4-3. Name and Functions of Indications on Remote Controller
[Display]
FILE NO. SVM-13092
All indications, except for the clock time indicator, are displayed by pressing the
1. Transmission mark
This transmission mark
remote controller transmits signals to the indoor
unit.
indicates when the
2. Mode indicator
Indicates the current operation mode.
(A : Auto, : Cool, : Dry, : Fan only)
3. Temperature indicator
Indicates the temperature setting.
(17°C to 30°C)
1
2
3
6
4. FAN speed indicator
Indicates the selected fan speed.
AUTO or five fan speed levels
(LOW
HIGH
Indicates AUTO when the operating mode is
either AUTO or
, LOW+ , MED
5. OFF TIMER indicator
Indicates when the OFF timer is setting press the
OFF timer button and select off time by TEMP
botton after that back to press OFF timer again to
timer setting and push CLEAR button to stop the
operation.
6. 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.
7. ECO indicator
Indicates when the ECO is in activated.
Press the ECO button to start and press it again
to stop operation.
button.
) can be shown.
: Dry.
, MED+ ,
8. 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.)
9. Swing
8
4
5 7
Press swing button to start the swing operation
and press it again to stop the swing operation.
– 45 –
10. INSTALLATION PROCEDURE
10-1. Installation Diagram of Indoor and Outdoor Units
FILE NO. SVM-13092
3 Batteries
170 mm or more
(Attach to the front panel)
Flat head
wood screw
Air filter
6
65 mm or more
H
o
o
k
4
Remote control holder
Vinyl tape
Apply after carrying
out a drainage test.
Hook
Installation
1
plate
170 mm or more
Shield pipe
For the rear left and left piping
Wall
Insert the cushion between the
indoor unit and wall, and tilt the
indoor unit for better operation.
Do not allow the drain hose to
get slack.
Cut the piping
hole sloped
slightly.
Make sure to run the drain hose
sloped downward.
The auxiliary piping can be
connected to the left, rear left,
rear right, right,bottom right
or bottom left.
2
Wireless remote control
100 mm or m
ore
mm or more
400
Before installing the wireless remote controller
• Loading Batteries
1. Remove the battery cover.
2. Insert 2 new batteries (AAA type)
-
following the (+) and (
) positions.
2 Wireless remote controller
or more
mm
45
600 mm or more
A
C
L
Saddle
Extension
drain hose
(Not available,
provided by installer)
600 mm or more
3 Batteries
Right
Rear
right
Bottom
right
Rear
left
Bottom left
Insulate the refrigerant pipes
separately with insulation, not
together.
6 mm thick heat resisting
polyethylene foam
Left
– 46 –
10-2. Installation
10-2-1. Optional installation parts
FILE NO. SVM-13092
Part
Code
Parts name
Refrigerant piping
A
Liquid side : ∅ 6.35 mm
Gas side : ∅ 9.52 mm
Pipe insulating material
B
(polyethylene foam, 6 mm thick)
Putty, PVC tapes
C
<Fixing bolt arrangement of outdoor unit>
500 mm
Air inlet
280 mm
97 mm
Ø25 mm
53 mm
Q'ty
One
each
1
One
each
Air outlet
Drain outlet
Fig. 10-2-1
·
Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind.
Use ∅ 8 mm or ∅ 10 mm anchor bolts and nuts.
·
·
If it is necessary to drain the defrost water, attach drain nipple 7 to the bottom plate of the outdoor
unit before installing it.
– 47 –
10-2-2. Accessory and installation parts
Part
No.
Part name (Q’ty)
Part
No.
Part name (Q’ty)
Part
No.
FILE NO. SVM-13092
Part name (Q’ty)
1
Installation plate x 1
2
Wireless remote control x 1
3
Battery x 2
Others
Name
Owner’s manual
Installation manual
4
Remote control holder x 1
5
Mounting screw ∅4 x 25 s x 6
6
Flat head wood screw
∅3.1 x 16 s x 2
7
Drain nipple* x 1
The part marked with asterisk (*) is packaged with the
outdoor unit.
– 48 –
FILE NO. SVM-13092
10-2-3. Installation/Servicing T ools
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 way v alve) 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 por ts-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 the spaces around the
indoor unit as shown in the above diagram.
• A place where there is no obstacle near the air inlet
and outlet.
• A place that 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 as top of the
indoor unit comes to at least 2 m height.
Also, it must be avoided to put anything on the top
of the indoor unit.
CAUTION
• Direct sunlight to the indoor unit’s wireless
receiver should be avoided.
• The microprocessor in the indoor unit should not
be too close to RF noise sources.
(For details, see the owner’s manual.)
FILE NO. SVM-13092
10-3-2. Cutting a hole and mounting installation
plate
<Cutting a hole>
When installing the refrigerant pipes from the rear.
Pipe
hole
∅
65 mm
The center of the pipe
hole is above he arow
Fig. 10-3-2
1. After determining the pipe hole position on the
mounting plate (A), drill the pipe hole (∅65 mm) at
a slight downward slant to the outdoor side.
100 mm
<Remote control>
• A place where there are no obstacles such as a
curtain that may block the signal from the indoor
unit.
• Do not install the remote control in a place exposed
to direct sunlight or close to a heating source, such
as a stove.
• Keep the remote control at least 1 m apart from the
nearest TV set or stereo equipment. (This is
necessary to prevent image disturbances or noise
interference.)
• The location of the remote control should be
determined as shown below.
Remote
control
(Top view)
Indoor unit
Reception
range
45°
°
5
4
Remote
control
Indoor unit
(Side view)
°
75
Reception
range
Fig. 10-3-1
NOTE
• When drilling 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
62
82.5
•
Installation
plate
170
85
Pipe hole
Indoor unit
Hook
Thread
Hook
Weight
Hook
Pipe hole
Mounting screw
…
Fig. 10-3-3
2 m or more from floor
– 50 –
FILE NO. SVM-13092
<When the installation plate is directly mounted on
the wall>
1. Securely fit the installation plate onto the wall by
screwing it in the upper and lower parts to hook up
the indoor unit.
2. To mount the installation plate on a concrete wall
with anchor bolts, utilize the anchor bolt holes as
illustrated in the above figure.
3. Install the installation plate horizontally in the wall.
CAUTION
When installing the installation plate with a
mounting screw, do not use the anchor bolt hole.
Otherwise the unit may fall down and result in
personal injury and property damage.
Installation plate
<Keep horizontal direction>
Anchor
bolt
Projection
15 mm 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 the power source for exclusive use with the
air conditioner.
NOTE
• Wire type : More than H07RN-F or 60245 IEC66
(1.5 mm2 or more).
CAUTION
• This appliance can be connected to the mains 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 incorporate in the fixed
wiring. An approved circuit breaker or
switches must 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.
-4
…
Mounting
screw
∅4 x 25
ss
s
ss
5 mm dia. hole
Clip anchor
(local parts)
Fig. 10-3
Fig. 10-3-5
CAUTION
Failure to firmly install the unit may result in
personal injury and property damage if the unit falls.
• In case of block, brick, concrete or similar type
walls, make 5 mm dia. holes in the wall.
•
Insert clip anchors for appropriate mounting screws
….
NOTE:
• Secure four corners and lower parts of the
installation plate with 4 to 6 mounting screws to
install it.
NOTE:
• Perform wiring works so as to allow a general
wiring capacity.
– 51 –
FILE NO. SVM-13092
10-3-4. Wiring connection
CAUTION
<How to connect the connecting cable>
Wiring of the connecting cable can be carried out
without removing of the front panel.
1. Remove the air inlet grille.
Open the air inlet grille upward and pull it toward
you.
2. Remove the terminal cover and cord clamp.
3. Insert the connecting cable (according to the local
cords) into the pipe hole on the wall.
4. Take out the connecting cable through the cable
slot on the rear panel so that it protrudes about
15 cm from the front.
5. Insert the connecting cable fully into the terminal
block and secure it tightly with screws.
6. Tightening torque : 1.2 N·m (0.12 kgf·m)
7. Secure the connecting cable with the cord clamp.
8. Fix the terminal cover, rear plate bushing and air
inlet grille on the indoor unit.
CAUTION
• Be sure to refer to the wiring system diagram
labeled inside the front panel.
• Check local electrical cords and also any specific
wiring instructions or limitations.
Cord clamp
Terminal cover
Screw
Terminal block
-5. Piping and drain hose installation
10-3
<Piping and Drain Hose Forming>
* Since dewing results in a machine trouble, make
sure to insulate both the connecting pipes. (Use
polyethylene foam as insulating material.)
Rear right
Rear left
Bottom left
Left
Bottom right
Right
Die-cutting
Front panel slit
Changing
drain hose
Piping preparation
Fig. 10-3-8
1. Die-cutting Front panel slit
Cut out the slit on the leftward or right side of the front
panel for the left or right connection and the slit on the
bottom left or right side of the front panel for the
bottom left or right connection with a pair of nippers.
2. Changing drain hose
For leftward connection, bottom-leftward connection
and rearleftward connection’s piping, it is necessary to
change the drain hose and drain cap.
<How to remove the Drain Cap>
Clip the drain cap by needle-nose pliers and pull out.
Earth line
Screw
Connecting cable
about 15 cm
Stripping length of the connecting cable
Screw
Connecting cable
110 mm
10 mm
10 mm
Earth line
50 mm
NOTE :
• Use stranded wire only.
• Wire type : More than H07RN-F or 60245 IEC66
(1.0 mm2 or more).
<How to install the air inlet grille on the indoor unit>
• When attaching the air inlet grille, the contrary of the
removed operation is performed.
Fig. 10-3
-9
<How to remove the drain hose>
The drain hose can be removed by removing the
•
screw securing the drain hose and then pulling out
the drain hose.
When removing the drain hose, be careful of any
•
sharp edges of steel plate. The edges can injuries.
• To install the drain hose, insert the drain hose firmly
until the connection part contacts with heat insulator,
and the secure it with original screw.
Heat insulator
Fig. 10-3-10
– 52 –
Drain hose
FILE NO. SVM-13092
<How to fix the Drain Cap>
1) Insert hexago wrench (4 mm) in a center head.
4 mm
Fig. 10-3-11
2) Firmly insert drain cap.
No gap
Do not apply lubricating oil
(refrigerant machine oil) when
inserting the drain cap. Application
causes deterioration and drain
Insert a hexagon
wrench (4 mm)
leakage of the plug.
Fig. 10-3
-12
CAUTION
<Left-hand connection with piping>
Bend the connecting pipe so that it is laid within 43 mm
above the wall surface. If the connecting pipe is laid
exceeding 43 mm above the wall surface, the indoor
unit may unstably be set on the wall. When bending the
connecting pipe, make sure to use a spring bender so
as not to crush the pipe.
Bend the connection pipe within a radius of 30 mm.
To connect the pipe after installation of the unit (figure)
(To the forefront of flare)
270 mm
230 mm
R 30 mm (Use polisin (polyethylene)
43 mm
core or the like for bending pipe.)
80
Gas side
Liquid side
Outward form of indoor unit
Use the handle of screwdriver, etc.
Firmly insert the drain hose and drain cap;
otherwise, water may leak.
<In case of right or left piping>
• After scribing slits of the front panel with a knife or a
making-off pin, cut them with a pair of nippers or an
equivalent tool.
Slit
Fig. 10-3
-13
<In case of bottom right or bottom left piping>
• After scribing slits of the front panel with a knife or a
making-off pin, cut them with a pair of nippers or an
equivalent tool.
Slit
Fig. 10-3
-14
Fig. 10-3
-15
NOTE
If the pipe is bent incorrectly, the indoor unit may
unstably be set 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.
CAUTION
• 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
• Carefully arrange pipes so that any pipe does not
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 double-taping at the joint, moreover, seal
the joint with the vinyl tape, etc.
• Since dewing results in a machine trouble, make
sure to insulate both the connecting pipes. (Use
polyethylene foam as insulating material.)
• When bending a pipe, carefully do it, not to crush it.
Connecting cable
– 53 –
FILE NO. SVM-13092
10-3-6. Indoor unit fixing
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 up 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 up on the installation plate.
1
2
Hook
Hook here
1 Installation
plate
Press
(unhook)
Fig. 10-3-16
• For detaching the indoor unit from the installation
plate, pull the indoor unit toward you while pushing
its bottom up at the specified parts.
10-3-7. Drainage
1. Run the drain hose sloped downwards.
NOTE
• Hole should be made at a slight downward slant on
the outdoor side.
Do not form the
Do not rise the
drain hose.
50 mm
or more
Do not put
the drain
hose end
into water.
Fig.
drain hose into
a wavy shape.
10-3-1
Do not put
the drain
hose end in
the drainage
ditch.
8
2. Put water in the drain pan and make sure that the
water is drained out of doors.
3. When connecting extension drain hose, insulate the
connecting part of extension drain hose with shield
pipe.
PushPush
Fig. 10-3-17
Shield pipe
Drain hose
Inside the room
10-3-
Fig.
Extension drain hose
19
CAUTION
Arrange the drain pipe for proper drainage from the
unit.
Improper drainage can result in dew-dropping.
This air conditioner has the structure designed to drain
water collected from dew, which forms on the back of
the indoor unit, to the drain pan.
Therefore, do not store the power cord and other parts
at a height above the drain guide.
Wall
Drain guide
Space for pipes
– 54 –
Fig.
10-3-
20
FILE NO. SVM-13092
10-4. Outdoor Unit
10-4-1. Installation place
• A place which provides the spaces around the
outdoor unit as shown in the left 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 users neighbors.
• A place which is not exposed to a strong wind.
• A place free of a leakage of combustible gases.
• A place which does not block a passage.
• When the outdoor unit is to be installed in an
elevated position, be sure to secure its feet.
• An allowable length of the connecting pipe is up
10 m.
• An allowable height level is up to 8 m.
• A place where the drain water does not raise any
problem.
10-4-2. Precautions about Installation in
Regions with Snowfall and Cold Temperatures
Do not use the supplied drain nipple for draining water.
Drain the water from all the drain holes directly.
To protect the outdoor unit from snow accumulation,
install a holding frame, and attach a snow protection
hood and plate.
Do not use a double-stacked design.
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 waves are likely
to be generated as from audio equipment,
welders, and medical equipment.
Strong
wind
2
10-4-
Fig.
10-4-3. Refrigerant piping connection
<Flaring>
1. Cut the pipe with a pipe cutter.
90°
Obliquity
Roughness
Fig. 10-4-3
Warp
Snow protection plate
Front
Anchor
bolts
Snow protection hood
At least
50 cm
Snow accumulation line
Holding frame
10-4-1
Fig.
Install at least 50 cm
above the snow
accumulation line.
CAUTION
1. Install the outdoor unit without anything blocking
the air discharging.
2. When the outdoor unit is installed in a place
exposed always exposed to strong wind like a
coast or on a high storey of a building, secure
the normal fan operation using a duct or a wind
shield.
3. In particularly windy areas, install the unit such
as to avoid admission of wind.
2. Insert a flare nut into the pipe, and flare the pipe.
· Projection margin in flaring : A (Unit : mm)
A
Die
Pipe
Fig. 10-4-4
Rigid (Clutch type)
Outer dia. R410A Conventional
of copper pipe tool used tool used
6.35 0 to 0.5 1.0 to 1.5
9.52 0 to 0.5 1.0 to 1.5
ial (wing nut type)
Imper
Outer dia.
of copper pipe
R410A
6.35 1.5 to 2.0
9.52 1.5 to 2.0
– 55 –
<Tightening connection>
Align the centers of the connecting pipes and tighten
the flare n
tighten the n
sho
ut as f.ar as possib
ut with a spanner and torque wrench as
wn in the figure..
Externally
threaded side
Use a wrench to secure.
le with y
our fingers
Flare nutHalf union
Internally
threaded side
Use a torque wrench to tighten.
Then
Fig. 10-4-5
FILE NO. SVM-13092
Incused line
Fig. 10-4-7
10-4-4. Evacuating
After the piping has been connected to the indoor unit,
you can perform the air purge together at once.
CAUTION
•
Do not apply excess torque.
•
Otherwise, the nut may crack depending on the
conditions.
(Unit : N•m)
Outer dia.
of copper pipe
∅6.35 mm 16 to 18 (1.6 to 1.8 kgf·m)
∅
9.52 mm 30 to 42 (3.0 to 4.2 kgf·m)
Tightening torque of flare pipe connections
The operating pressure of R410A is higher than that of
R22. (Approx. 1.6 times).
It is therefore necessary to firmly tighten the flare pipe
connecting sections (which connect the indoor and
outdoor units) up to the specified tightening torque.
Incorrect connections may cause not only a gas
leakage, but also damage to the refrigerant cycle.
Fig. 10-4-6
<Shaping pipes>
1. How to shape the pipes
Shape the pipes along the incused line on the
outdoor unit.
2. How to fit position of the pipes
Put the edges of the pipes to the place with a
distance of 85 mm from the incused line.
Tightening torque
Flare at
indoor unit side
Flare at
outdoor unit side
.
AIR PURGE
Ev
acuate the air in the connecting pipes and in the
indoor unit using a v
refr
iger
ant in the outdoor unit.. F or details
man
ual of the v
<Using a v
acuum pump>
acuum pump
acuum pump
Do not use the
, see the
Be sure to use a vacuum pump with counter-flow
prevention function so that inside oil of the pump does
not flow backward into pipes of the air conditioner
when the pump stops. (If oil inside of the vacuum pump
enters into the air conditioner, which use R410A,
refrigeration cycle trouble may result.)
1. Connect the charge hose from the manif
old valv
e 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 start 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. Then confirm that the compound
pressure gauge reading is -101 kP
a (76 cmHg).
5. Close the low pressure side valve handle of gauge
manifold.
6. Open fully the valve stem of the packed valves
(both side of Gas and Liquid).
7. Remove the charging hose from the service port.
8. Securely tighten the caps on the packed valves.
Compound pressure gauge
-
101 kPa ( 76 cmHg)
Handle Lo
Charge hose
Connecting pipe
Service port
(Valve core (Setting pin))
Packed valve at liquid side
Packed valve at gas side
Pressure gauge
Manifold valve
Handle Hi
(Keep full closed)
Charge hose
Vacuum pump
adapter for
counter-flow
prevention
Vacuum
pump
– 56 –
Fig. 10-4-8
FILE NO. SVM-13092
CAUTION
•
KEEP IMPORTANT 5 POINTS FOR PIPING WORK
(1) Take away dust and moisture (Inside of the
connecting pipes.)
(2) Tight connection (between pipes and unit)
(3) Evacuate the air in the connecting pipes using
VACUUM PUMP.
(4) Check gas leak (connected points)
(5) Be save to fully open the packed valves
before operation.
<Packed valve handling precautions>
• Open the valve stem all the way out, but do not try
to open it beyond the stopper.
Pipe size of Packed Valve
12.70 mm and smallers
15.88 mm
• Securely tighten the valve cap with torque in the
following table
Cap Torque
Valve Rod
Cap
Service
Port Cap
Cap Size (H)
H17 - H19
H22 - H30
H14
H17
Size of Hexagon wrench
A = 4 mm
A = 5 mm
14~18 N.m
(1.4 to 1.8 kgf·m)
33~42 N.m
(3.3 to 4.2 kgf·m)
8~12 N.m
(0.8 to 1.2 kgf·m)
14~18 N.m
(1.4 to 1.8 kgf·m)
<Stripping length of connection cable>
Terminal block
Connecting cable
Earth line
Connecting cable Power cord
Power cord
Earth line
Fig. 10-4-10
Model
Power source
Maximum
running current
Installation fuse
rating
Power cord
50Hz, 220-240V Single phase
60Hz, 220-230V Single phase
H07RN-F or 60245 IEC66 (1.5 mm
or more)
RAS-077,107
137SKV Series
8A
10A
2
Hexagon wrench
is required.
CAUTION
Service Port Cap
Valve Rod Cap
H
A
Fig. 10-4-9
10-4-5. Wiring connection
1. Remove the valve cover from the outdoor unit.
2. Connect the connecting cable to the terminal as
identified with their respective matched numbers on
the terminal block of indoor and outdoor unit.
3. When connecting the connecting cable to the
outdoor unit terminal, make a loop as shown in the
installation diagram of indoor and outdoor unit, to
prevent water coming in the outdoor unit.
4. Insulate the unused cords (conductors) from any
water coming in the outdoor unit. Proceed them so
that they do not touch any electrical or metal parts
CAUTION
• Wrong wiring connection may cause some
electrical parts burn out.
• Be sure to comply with local codes on running
the wire from indoor unit to outdoor unit (size of
wire and wiring method etc).
• Every wire must be connected firmly.
• This installation circuit breaker must.
be used specified for the power supply line of
this air conditioner.
· If incorrect or incomplete wiring is carried out, it
will cause an ignition or smoke.
· Prepare the power supply for exclusive use with
the air conditioner.
· This product can be connected to the mains.
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.
NOTE: Connecting cable
• Wire type: More than H07RN-F or 60245 IEC66
(1.0 mm2 or more)
.
– 57 –
10-5. Others
10-5-1. Gas leak test
Check places for
indoor unit (Flarenut
connection)
Check places
for outdoor unit
Fig. 10-5-1
• Check the flare nut connections for the gas leak with
a gas leak detector or soap water.
FILE NO. SVM-13092
NOTE : 1. Repeat above step to reset Remote
Control to be A.
2. Remote Control A has not "A" display.
3. Default setting of Remote Control from
factory is A.
12
Fig. 10-5-2
10-5-3. Test operation
To switch the TEST RUN (COOL) mode, press
[RESET] button for 10 sec.
(The beeper will make a short beep.)
10-5-2. Remote Control A-B Selection
• When two indoor units are installed in the same room or
adjacent two rooms, if operating a unit, two units may
receive the remote control signal simultaneously and
operate. In this case, the operation can be preserved
by setting either one remote control to B setting.
(Both are set to A setting in factory shipment.)
•
The remote control signal is not received when the
settings of indoor unit and remote control are different.
•
There is no relation between A setting/B setting and A
room/B room when connecting the piping and cables.
<Remote control A-B selection>
To separate using of remote control for each indoor unit
in case of 2 air conditioners are installed nearly.
<Remote Control B Setup>
1. Press [RESET] button on the indoor unit to turn the air
conditioner ON.
2. Point the remote control at the indoor unit.
3. Push and hold [CHECK] button on the Remote Control
by the tip of the pencil. "00" will be shown on the display
(Picture ).
1
4. Press [MODE] during pushing [CHECK]. "B" will show
on the display and "00" will disappear and the air
conditioner will turn OFF. The Remote Control B
is memorized (Picture ).
2
RESET
RESET button
Fig. 10-5-3
10-5-4. 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 power 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>
1. Press and hold the [RESET] button on the indoor unit
3 seconds to set the operation. (3 beep sound and
OPERATION lamp blink 5 time/sec for 5 seconds)
2. Press and hold the [RESET] button on the indoor
unit for 3 seconds to cancel the operation. (3 beep
sound but OPERATION lamp does not blink)
· In case of ON timer or OFF timer are set, AUTO
RESTART OPERATION dose not activate.
– 58 –
FILE NO. SVM-13092
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. (Refer 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
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
CAUTION: HIGH VOLTAGEN
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
will be incorporated starting with this unit.
K The control circuitry has an uninsulated construction.
Fig. 11-1
– 59 –
FILE NO. SVM-13092
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 par ts 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 power
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) by 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 C07 (“CAUTION HIGH VOLTAGE” is indicated.) electrolytic capacitor
(500µF/400V or 760µF/400V) on P.C. board, and then perform discharging.
Inverter cover
P. C. board
(Soldered surface)
– 60 –
Fig. 11-3
FILE NO. SVM-13092
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, F AN (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 [ ] 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.
– 61 –
FILE NO. SVM-13092
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 troubles.
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.
– 62 –
FILE NO. SVM-13092
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, execute the self-diagnosis by the remote controller.
2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condition 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 [TEMP ] or [TEMP ] 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 :
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 [TEMP ] or [TEMP ] 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.)
3
Press [CLEAR] button. After service finish for clear
service code in memory.
• "7F" is indicated on the display of the remote
control.
4
Press [ ] button to release the service mode.
• The display of the remote controller returns to as it
was before service mode was engaged.
Fig. 11-4-1
– 63 –
FILE NO. SVM-13092-1
11-4-2 Caution at Servicing
1. After using the service mode of remote controller finished, press the [ ] button to reset the remote controller to
normal function.
2. After finished the diagnosis by the remote controller, turn OFF power supply and turn its ON again to reset the air
conditioner to normal operation. However, the check codes are not deleted from memory of the microcomputer.
3. After servicing finished, press [CLR] button of remote controller under service mode status to send code "7F" to the
indoor unit. The check code stored in memory is cleared.
Table 11-4-1
Block distinction Operation of diagnosis function
Check
code
Block
Indoor P.C. TA sensor ; The room Operation Flashes when 1. Check the sensor TA and connection.
board. temperature sensor is continues. error is detected. 2. In case of the sensor and its
Check
code
Cause of operation
short-Circuit or disconnection. connection is normal, check the
Air
conditioner
status
Display flashing
error
P.C. board.
Action and Judgment
TC sensor ; The heat Operation Flashes when 1. Check the sensor TC and connection.
exchanger temperature continues. error is detected. 2. In case of the sensor and its
sensor of the indoor unit connection is normal, check the
is out of place, disconnection, P.C. board.
short-circuit or migration.
Fan motor of the indoor unit All OFF Flashes when 1. Check the fan motor and connection.
is failure, lock-rotor, short- error is detected. 2. In case of the motor and its
circuit, disconnection, etc. connection is normal, check the
Or its circuit on P.C. board P.C. board.
has problem.
Other trouble on the indoor Depend on Depend on Replace P.C. board.
P.C. board. cause of cause of
failure. failure.
– 64 –
FILE NO. SVM-13092-1
Block distinction Operation of diagnosis function
Check
code
Block
Serial signal 1) Defective wiring of the Indoor unit Flashes when 1) to 3) The outdoor unit never
and connecting connecting cable or operates error is detected. operate.
cable. miss-wiring. continue. Flashing stop Check connecting cable and correct
Check
code
Cause of operation
2) Operation signal has not Outdoor unit and outdoor unit if defective wiring.
send from the indoor unit stop. start to operate Check 25A fuse of inverter P.C. board.
when operation start. when the return Check 3.15A fuse of inverter
3) Outdoor unit has not signal from the P.C. board.
send return signal to the outdoor unit is Check operation signal of the indoor
indoor unit when operation normal. unit by using diode. Measure voltage
started. at terminal block of the indoor unit
4) Return signal from the between No.2 and No.3 (or L2 and S)
outdoor unit is stop during If signal is varied 15-60V continuously,
operation. replace inverter P.C. board.
Some protector If signal is not varied, replace indoor
(hardware, if exist) of the P.C. board.
outdoor unit open 4) The outdoor unit abnormal stop at
circuit of signal. some time.
Signal circuit of indoor If the other check codes are found
P.C. board or outdoor concurrently, check them together.
P.C. board is failure Check protector (hardware) such
in some period. as Hi-Pressure switch,
Note : Operation signal of the indoor unit shall be measured in the sending period as
picture below.
Sending signal of the indoor unit when have not return
VDC
signal from the outdoor unit.
60
3 minutes Delay, start
counting from power
supply ON or remote
OFF.
*
3 minutes stop
Voltage variation stop
or have not voltage
output.
**
conditioner
***
Air
status
Display flashing
error
Thermal-Relay, etc.
Check refrigerant amount or any
possibility case which may caused
high temperature or high pressure.
Check operation signal of the indoor
unit by using diode. Measure voltage
at terminal block of the indoor unit
between No.2 and No.3 (or L2 and S)
If signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.
15
Action and Judgment
Measured signal voltage by apply diode
0
34 78
Time (Min)
* Signal send only 1 minute and stop. Because of return signal from outdoor unit has not received.
Signal resend again after 3 minutes stop. And the signal will send continuously.
**
* 1 minute after resending, the indoor unit display flashes error.
**
– 65 –
Block distinction Operation of diagnosis function
Check
code
Block
Outdoor P.C. Current on inverter circuit All OFF Flashes after 1. Remove connecting lead wire of the
board is over limit in short time. error is detected compressor, and operate again.
Check
code
Cause of operation
Inverter P.C. board is 4 times*. 2. If outdoor fan does not operate or
failure, IGBT shortage, etc. operate but stop after some period,
Compressor current is replace the inverter P.C. board.
higher than limitation, 3. If outdoor fan operates normally,
lock rotor, etc. measure 3-Phase output of inverter
Compressor position-detect All OFF Flashes after 1. Remove connecting lead wire of the
circuit error or short-circuit error is detected compressor, and operate again.
between winding of 4 times*. 2. If outdoor fan does not operate or
compressor. operation but stop after some period,
Air
conditioner
status
Display flashing
error
FILE NO. SVM-13092-1
Action and Judgment
P.C. board (150-270VAC) at the
connecting lead wire of compressor.
4. If 3-Phase output is abnormal, replace
inverter P.C.Board.
5. If 3-Phase output is normal, replace
compressor. (lock rotor, etc.)
replace the inverter P.C. board.
3. If outdoor fan operates normally,
measure resistance of compressor
winding. If circuit is shortage, replace
the compressor.
Current-detect circuit of All OFF Flashes after Even if trying to operate again, all
inverter P.C. board error. error is detected operations stop, replace inverter
4 times*. P.C. board.
TE sensor ; The heat All OFF Flashes after 1. Check sensors TE, TS and connection.
exchanger temperature error is detected 2. In case of the sensors and its
sensor of the outdoor unit 4 times*. connection is normal, check the
either TS sensor ; Suction inverter P.C. board.
pipe temperature sensor,
out of place, disconnection
or shortage.
TD sensor ; Discharge pipe All OFF Flashes after 1. Check sensors TD and connection.
temperature sensor is error is detected 2. In case of the sensor and its
disconnection or shortage. 4 times*. connection is normal, check the
inverter P.C. board.
Outdoor fan failure or its All OFF Flashes after 1. Check the motor, measure winding
drive-circuit on the inverter error is detected resistance, shortage or lock rotor.
P.C. board failure. 4 times*. 2. Check the inverter P.C. board.
TO sensor ; The outdoor Operation Record error 1. Check sensors TO and connection.
temperature sensor is continues. after detected 2. In case of the sensor and its
disconnection or shortage. 4 times*. connection is normal, check the
But does not inverter P.C. board.
flash display.
– 66 –
Block distinction Operation of diagnosis function
Check
code
Block
Check
code
Cause of operation
Compressor drive output error. All OFF Flashes after 1. Check installation conditions such as
(Relation of voltage, current error is detected packed valve opening, refrigerant
and frequency is abnormal) 4 times*. amount and power supply (rate +
Overloading operation of both of operation and non operation
compressor caused by condition).
over-charge refrigerant, 2. Check P.M.V. by measure the
P.M.V. failure, etc. resistance of the coil and confirm its
Compressor failure (High operation (sound of initial
current). operation, etc.)
Air
conditioner
status
Display flashing
error
FILE NO. SVM-13092-1
Action and Judgment
10%,
3. Observe any possibility cause which
may affect operation load of
compressor.
4. Operate again. If compressor
operation is failure when 20 seconds
passed (count time from operation
starting of compressor), replace
compressor.
* 8 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started.
After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times)
When error count comes 4 times, record error to check code. But after re-starting operation, if no error is
detected and air conditioner can operate more than 6 minutes, error count is cleared.
The others Return signal of the outdoor Indoor unit Flashes when 1. Check power supply (Rate +
(including unit has been sent when operates error is detected. 2. If the air conditioner repeat operates
compressor) operation start. But after continue. Flashing stop and stop with interval of approx. 10
that, signal is stop some time. Outdoor unit and outdoor unit to 40 minutes.
Instantaneous power stop. start to operate Check protector (hardware) such
failure. when the return as Hi-Pressure switch,
Some protector signal from the Thermal-Relay, etc.
(hardware) of the outdoor unit is Check refrigerant amount, packed
outdoor unit open normal. valve opening and any possibility
circuit of signal. cause which may affect high
Signal circuit of indoor temperature or high pressure.
P.C. board or outdoor 3. Check operation signal of the indoor
P.C. board is failure unit by using diode. Measure voltage
in some period. at terminal block of the indoor unit
between No.2 and No.3 (or L2 and S)
If signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.
10%)
– 67 –
Block distinction Operation of diagnosis function
Check
code
Block
Check
code
Cause of operation
Compressor does not rotate. All OFF Flashes after 1. Remove connecting lead wire of the
Because of missed wiring, error is detected compressor, and operate again.
missed phase or shortage. 4 times*. 2. If outdoor fan does not operate or
Discharge temperature All OFF Flashes after 1. Check sensors TD.
exceeded 117
o
C.
Air
conditioner
status
FILE NO. SVM-13092-1
Display
flashing error
operation but stop after some period,
replace the inverter P.C. board.
3. If outdoor fan operates normally,
measure 3-Phase output of inverter
P.C. board (150-270VAC) at the
connecting lead wire of compressor.
4. If 3-Phase output is abnormal, replace
inverter P.C.Board.
5. If 3-Phase output is normal, measure
resistance of compressor winding.
6. If winding is shortage, replace the
compressor.
error is detected 2. Check refrigerant amount.
4 times*. 3. Check P.M.V. by measure the
resistance of the coil and confirm its
operation (sound of initial
operation, etc.)
4. Observe any possibility cause which
may affect high temperature of
compressor.
Action and Judgment
Compressor is high current All OFF Flashes after 1. Check installation conditions such as
though operation Hz is error is detected packed valve opening, refrigerant
decreased to minimum limit. 4 times*. amount and power supply (rate +
Installation problem. both of operation and non operation
Instantaneous power condition).
failure. 2. Check P.M.V. by measure the
Refrigeration cycle resistance of the coil and confirm its
problem. operation (sound of initial
Compressor break down. operation, etc.)
Compressor failure (High
current).operation, etc.)
* 8 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started.
After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times)
When error count comes 4 times, record error to check code. But after re-starting operation, if no error is
detected and air conditioner can operate more than 6 minutes, error count is cleared.
3. Observe any possibility cause which
may affect high current of compressor.
4. If 1, 2 and 3 are normal, replace
compressor.
10%,
– 68 –
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 v oltage normal?
2. Is the normal voltage provided to the outdoor unit?
3. Is the crossover cable connected properly?
4. Is the fuse (F01) blown?
FILE NO. SVM-13092
supply once, and 5
second later, turn it
NO
Is fuse (F01)
of indoor control
board blown?
NO
Turn off power
on again.
Is OPERATION
lamp blinking?
YES
Is it possible to
turn on power
supply by pressing
[ ]
button
on remote
control?
YES
YES
(DB01,C27,T01
and IC02)
are defective.
Parts
NO
Does
transmission
mark on
remote control
flash normally,
and is its signal
transmitted
properly?
YES
NO
Does
fan motor
connector
between 1
3
and
short-circuit?
Remote control is
defective.
Refer to (4)
"Troubleshooting for
Remote Control.
YES
"
Operation
Check item
Conceivable principle
cause
Measure
Item by symptoms
Unit operates
normally.
Is voltage
(DC 12V or 5V)
NO
indicated on
rear of indoor
control board
normal?
Is the
voltage
across C27
mesured
DC 310V~340V?
YES
Are DC 5V,
DC 12V
supplied
to main
P.C. board?
YES YES
NO
NO
Refer to
<Primary check>
or this problem
is one step short
of power P.C.
board block.
Turn off breaker
once and turn it
on again after
removing motor.
YES
Are DC 5V,
or DC 12V
supplied
to main
P.C. board?
NO
NO
Microcomputer
is defective.
Regulator IC
(IC02) or T01
are defective
Replace main
P.C. board.
Replace motor
• Be sure to disconnect the motor connector CN31 after shut off the power supply, or it will be a cause of
damage of the motor.
– 69 –
.
(2) Power is not turned on though Indoor P.C. board is replaced
<Confirmation procedure>
Turn on power supply.
FILE NO. SVM-13092
Does operation lamp flash?
YES YES
NO NO
Is wired correctly to white and black
lead wires of terminal board?
Correct wiring.
To item of
“Power is not turned on”.
– 70 –
FILE NO. SVM-13092
(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 prevent a cold air from blowing in.)
Shut off the
power supply once.
Turn the power supply.
Does the fan stop in
no operating status?
YES
Start the operation
with low fan setting
in cool operation.
Does the fan rotate?
YES
Change the setting of
cooling to high fan.
Does the fan speed
become higher?
NO
NO
NO
Control P.C. board is defective.
Does AC 120 V
or higher voltage apply
to between red and black
lead of fan motor?
YES
Shut off the power supply.
Does the cross flow
fan rotate normally?
YES
Turn on the power supply.
Operation
stops
Replace the P.C. board.
Does connecting
terminal, connecting
NO NO
NO
cable or power supply
cord completely?
Does not found the short
wire about connecting
cable and power cord?
YES
Repair the
bearing of
the fan.
Motor control circuit failure
(IC31, Q301) or 12 V
Switching power supply failure.
YES
Normal
−
Is the rotation signal (DC+5 V
output between 2 (gray lead wire)
and 3 (brown lead wire) of the motor
connector (CN33) when rotating the
cross flow fan by hand in no operating
status? (1 pulse/one turn)
YES
Replace the control
P.C. board.
0 V)
– 71 –
NO
Replace the P.C. board.
Replace the fan motor.
Replace connecting the
cable (or power cord),
thermal fuse and
terminal block.
(For AC fan motor)
<Inspection procedure>
1. Remove the front panel. (Remove 2 screws.)
2. Remove the cover of the fan motor lead wires.
3. Check AC voltage with CN31 connector while the fan motor is rotating.
NOTE :
• Using a tester, measure the resistance value of each winding coil.
• Use a thin test rod.
RPG-240-25A
• Do not disconnect the connector while the fan motor is rotating.
• For P.C. board side, proceed to the item "Only indoor fan does not operate"
of "Judgment of Trouble by Every Symptom".
WHI
5
CN31
BLK
3
RED
1
BLK
WHI
RED
BLK
3
3
WHI
2
2
RED
1
1
FILE NO. SVM-13092
P.C. board
CN33
BLU
3
PUR
2
GRY
1
BLU
PUR
GRY
3
3
2
2
1
1
Position (P.C. board)
Between 3 (Black) - 1 (Red)
Between 3 (Black) - 5 (White)
Between 1 (Red) - 5 (White)
BLU
PUR
GRY
Resistance value
218
± 33 Ω
388
± 58 Ω
606
± 91 Ω
– 72 –
FILE NO. SVM-13092
(4) 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 there direct
sunlight on the
receptor of the air
conditioner?
YES
NO
Is there any
thyristor
fluorescent light
nearly?
YES
YES
NO NO
Push the [ ] button.
Does the transmission
indicator blink?
Is operation
possible when the
transmitter is moved
nearer to the infrared
signal receiver of the
air conditioner?
YES
Battery life
There is no beep from the indoor unit
The OPERATION lamp of the
air conditioner main unit does not light
NO
Reset the remote
control by take off
batteries
Push the [ ]
button
Avoid direct
sunlight.
NO
Keep the air
conditioner away
from thyristor
fluorescent light.
Is operation possible
when setting the
temporary switch of the
air conditioner main unit
to “TEST RUN” or
“TEMPORARY AUTO”?
YES
Can any signal tone
be heard in a transistor
radio when transmitting
within 5 cm distance
from the radio?
YES
P.C. board is failure.
Replace
P.C. board
NO
Replace the
batteries
NO
indicator light?
Normal
Dose the
transmission
YES
Is there any
beep and
operation?
YES
NO
Remote control
is failure.
Replace remote
control.
– 73 –
FILE NO. SVM-13092
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
S5277G
2
S5277G or equivalent (G or J type)
(Diode with rated voltage of 400V
or more is acceptable.)
Tester
7-1.)
Normal time
1
Terminal block
:
Voltage swings between DC15 and 60V. ...................Inverter Assembly check (11-
Abnormal time : Voltage does not vary.
(2) Outdoor unit stops in a little while after operation started
<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 power 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.
– 74 –
11-6. How to Check Simple the Main Parts
<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)
FILE NO. SVM-13092
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
– 75 –
Replace valve.
Add gas.
11-7. How to Diagnose Trouble in Outdoor Unit
11-7-1. Summarized Inner Diagnosis of Inverter Assembly
Table 11-7-1
FILE NO. SVM-13092
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
Tur n “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 electro-
lytic capacitor (500µF or
760µF) of C07 (with printed
CAUTION HIGH VOLTAGE)
on P.C. board.
Does outdoor
fan rotate?
YES
NG
Replace
outdoor
fan motor.
NO
Remove connector
CN31 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.
500µF:400WV x 2
760
µ
F:400WV x 2
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 500µF or 760µF →
DC280 to 380V
Remove CN31 while pushing
the part indicated by an
by an arrow because CN31
is a connector with lock.
→ Resistance between
phases should be
approx. 55 to 77Ω
→ Should be 10MΩ or
more.
– 76 –
FILE NO. SVM-13092
Diagnosis/Process flowchart Item
BA
Replace control
board assembly.
Check
compressor
winding
resistance.
OK
Replace
control board.
NG
Replace
compressor.
Operation
Check
Contents
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 CN31 of
the outdoor fan motor, turn
on the power supply breaker,
and perform the operation.
(Stops though activation is
prompted.)
Check operation within 2
minutes 20 seconds after
activation stopped.
Summary
→ OK if 10MΩ or more
→ OK if 0.51Ω → 0.57Ω
(Check by a digital tester.)
11-8. How to Check Simply the Main Parts
11-8-1. 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 power 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 f or 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, 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.
– 77 –
FILE NO. SVM-13092
(3) Check procedures
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 [ ] button once
to start the unit. (Do not set the
mode to On-Timer operation.)
4
Shorten the restart delay timer
and start unit.
Procedure
Table 11-8-1
Check points
Check whether or not the fuse (F01)
is blown.
Check power supply voltage :
1. Between No. 1 and No. 3 of CN01
(AC 220–240V)
2. Between and of C27
(DC 310–340V)
3. Between 12V and GND
4. Between 5V and GND
Check power supply voltage :
1. Between CN51 and
No. 1 of CN01 (DC 15–60V)
Check whether or not all indicators
(OPERATION,TIMER,FILTER,PRE.DEF,
Hi POWER) are lit for 3 seconds and
they return to normal 3 seconds later.
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 (R64), or the diode
(DB01) is defective.
3. T01 is defective.
4. IC02 and T01 are defective.
IC51 and IC52 are defective.
The indicators are defective or the
housing assembly (CN21) is defective.
5
Push [ ] 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.)
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 whether or not the
compressor operates.
2. Check whether or not the
OPERATION indicator flashes.
1. Check it is impossible to detect
the voltage (AC120V or higher
voltage) between red and black
lead of the motor.
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.
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.)
(CN62)
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 temperature of the indoor heat
exchanger is extremely high.
2. The connection of the heat
exchanger sensor short-circuited.
(CN62)
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.
– 78 –
11-8-2. P .C . Board Layout
FILE NO. SVM-13092
+ 5V
[1] Sensor characteristic table
100
90
80
70
60
50
40
30
Resistance value (k )
20
10
0
010203040 5 600
Temperature (˚C)
+ 12V
+12V
TD
TA, TC, TO, TS, TE
GND
TD : Discharge temp. sensor
TA : Room temp. sensor
TC : Heat exchanger temp. sensor
TO : Outdoor temp. sensor
TS : Suction temp. sensor
TE : Outdoor heat exchanger temp
sensor
– 79 –
11-8-3. Indoor Unit (Other Parts)
k
FILE NO. SVM-13092
No.
1
Room temp. (TA) sensor
Heat exchanger (TC) sensor
23Remote controller
Louver motor
24BYJ48-HTP
4 Indoor fan motor
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
Refer to 11-5-1. (3) and (4).
11-8-4. Outdoor Unit
No. Part name Checking procedure
1 Compressor
(Model : ASM89D16UEZ)
Measure the resistance value of each winding by using the tester.
Back
Position Resistance value
Red - White
White - Black 1.44Ω (20°C)
White Red
Black - Red
Resistance value
250Ω ± 7%
2
Outdoor fan motor
(Model : ICF-140-43-4R)
3
4-way valve coil
(Model : SQ-A2522G-000352)
4
Pulse modulating valve coil
Measure the resistance value of winding by using the tester.
Red
Position
Resistance value
Red - White
White - Black
White Blac
Black- Red
Measure the resistance value of winding by using the tester.
Resistance value
2210 ± 221Ω
Measure the resistance value of winding by using the tester.
COM
1
6
GR
3
O
Position
Gray - White
Gray - Orange
Resistance value
Gray- Yellow
COM
YWGR BL
254
Gray- Blue
Under 20°C
20 to 22Ω
20 to 22Ω
20 to 22Ω
Under 20°C
42 to 50Ω
42 to 50Ω
42 to 50Ω
42 to 50Ω
Under 20°C
– 80 –
FILE NO. SVM-13092
5 Outdoor temperature sensor
(TO), discharge temperature
sensor (TD), suction temperature
e
xchanger temper
(TE)
ature sensor
Disconnect the connector, and measure resistance value with the tester.
(Normal temperature)
Temperature
Sensor
TA, TC (kΩ ) 105 64 41 27 18
TGa : Heat pump model only.
TO, TE : Refer to the TA, TC characteristic table in Indoor
(Refer to Table 10-8-3, No.1).
10°C 20°C 30°C 40°C 50°C
11-8-5. Checking Method for Each Part
No. Part name Checking procedure
1 Electrolytic capacitor 1. Turn OFF the power supply breaker.
(For raising pressure, smoothing) 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 show in
continuity test by the tester.
Case that product is good
Pointer swings once, and
returns slowly. When
performing test once again
under another polarity, the
pointer should return.
C07, C08, C09 → 500µF/400V or 760µF/400V
2 Converter module 1. Turn OFF the power supply breaker.
2. Discharge all three capacitors completely.
3 Check that the normal rectification characteristics are shown in continuity
test by the tester.
2
1
Diode check
Tester rod
ed
~
1
\
d
~
\2
~
1
\
e
~
2
\
+–~
~
123
(DB01)
Resistance value
in good product
50kΩ or more
(0Ω in trouble)
4
– 81 –
FILE NO. SVM-13092
11-9. 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 f an 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
CN31
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.
– 82 –
11-10. How to setting the CLEAN OPERATION cancel
1. Add J201 of indoor PC board assembly.
(If AUTO RESTART set before, will automatic cancel when add J201)
J201
FILE NO. SVM-13092
2. Turn ON breaker, then hold down the [RESET] button on the indoor unit
for 3 seconds but not more than 10 seconds.
(The indoor unit 's buzzer will emits 3 beeps)
RESET button
RESET
3. To operate a cooling mode for 20 minutes, then turn off by remote control
to ensure that "Clean operation" is cancelled.
Remark If Auto restart still require, take off J201 when finish a "Clean operation cancelling" procedure.
– 83 –
FILE NO. SVM-13092
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 following 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, they 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 absolutely 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.
Remarks
– 84 –
FILE NO. SVM-13092
No.Part name
Front panel
Procedures
4) Press "PUSH" part under the front panel
and remove hooks of the front panel from
the installation plate.
5) Remove the front panel fixing screws.
(2 pcs.)
6) Take off three hooks of panel from rear
side.
Remarks
Installation plate
Front panel
Press
2 Screws
Three hooks
<How to assemble the front panel>
1) Press three center positions and two lower center positions of the air outlet, and
then hang the hanging hooks (3 pcs.) at the top side of the front panel to the rear
plate.
2) Tighten two screws.
• Incomplete hanging or incomplete pressing may cause a de wdrops or generation
of a fluttering sound.
– 85 –
r
FILE NO. SVM-13092
No.
Part name
Electric parts
box assembly
Procedures
1) Follow the procedure up to 3) 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 for the fan motor and connector for the louver motor from the electric
parts box assembly.
4) Pull out TC sensor from sensor holder of the
evaporator.
5) Disengage the display unit by simply pushing
at the top of the display unit.
6
) Remove the fixing screw that secures the
electric parts box assembly, and remove the
assembly.
TC sensor
Earth Screw
Remarks
Electric part
box cove
Fan motor
connector
<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,
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.
Fixing screw
Louver motor
connecto
AC fan motor
connector
– 86 –
FILE NO. SVM-13092
No.
Part name
Horizontal louver
Evaporator
(Heat exchanger)
Procedures
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.
2 screws
Remarks
4) Remove one fixing screw on the
heat exchage fixing holder to separate the
heat exchage from the back body.
5) Remove right side of the end plate from
two fixing rib while sliding slightly the
heat exchanger rightward.
Heat exchanger fixing
holder
Rib on the right side of the end plate
Screw
– 87 –
FILE NO. SVM-13092
No. Part name
Bearing
Procedures
1) Follow to the procedure in the item .
2) Remove the two screws used to secure the
bearing base.
3) 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.
…
Remarks
Two screws
Bearing
Bearing base
– 88 –
FILE NO. SVM-13092
No.
Part name
F an motor
Procedures
1) Follow to the procedure till item .
…
2) Loosen the set screw of the cross flow fan.
3) Remove two fixing screws of the motor cover
and them remove the motor cover.
4) Remove two more fixing screws of the
motor band and remove the motor band.
Two screws
Remarks
Set screw
Two screws on
motor band
Motor cover
5) Pull the fan motor outward.
– 89 –
FILE NO. SVM-13092
No. Part name
Cross flow fan
Procedures
<Caution at reassembling>
1) To incorporate the fan motor incorporate the
motor into the position in the following figure,
and then install the fan motor.
• 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 5.0 mm from
closed wall of the main unit.
• Holding the set screw, install the cross flow
fan so that flat area on shaft of the fan motor
comes to the mounting hole of the set screw.
• Perform 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.
Remarks
Fan motor D shaft 5mm Double point set screw
– 90 –
12-2. Microcomputer
FILE NO. SVM-13092
No.
Part name
Common procedure
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.
Remarks
Replace terminal block,
microcomputer ass’y and the
P.C. board ass’y.
– 91 –
FILE NO. SVM-13092
12-3. Outdoor Unit
No. Part name Procedures Remarks
1 Common
procedure
1. Detachment
1) Stop operation of the air conditioner, and
turn off the main switch and breaker of the
air conditioner.
2) Remove the valve cover. (ST1T∅4 x 10s
1 pc)
• After removing screw, remove the valve
cover pulling it downward.
3) Remove the wiring cover (ST1T∅4 x 10s 2
pcs.), and then remove the power cord,
connecting cable, and cord clamp
(ST2T∅4 x 16s 3 pcs.).
4) Remove the upper cabinet.
(ST1T∅4 x 10s 5 pcs.)
• After removing screws, remove the
upper cabinet pulling it upward.
2. Attachment
1) Attach the upper cabinet.
(ST1T∅4 x 10s 5 pcs.)
• Hook the rear side of the upper cabinet
to the claw of the rear cabinet, and then
place it on the front cabinet.
2) After connecting the power cord and
connecting cable, attach the cord clamp
and wiring cover.
• Insert the upper part into the upper
cabinet, and insert the claw which has
been hooked to the lower part into the
square hole, and then fix it with screw.
(ST1T∅4 x 10s 1 pc.)
3)
Attach the valve cover. (ST1T∅4 x 10s 1 pc.)
• Insert the upper part to the upper
cabinet, set the hook claw of the valve
cover to square holes (at three
positions) of the main unit, and attach it
pushing upward.
Upper cabinet
Wiring cover
Valve cover
Upper cabinet
2 Front cabinet
1. Detachment
1) Perform work of item 1 of 1.
2) Remove upper screw (ST1T∅4 x 10s 4 pcs.)
of the front cabinet, and lower screws
(ST1T∅4 x 10s 8 pcs.) of the front cabinet.
• Both side of front cabinet envelop the
unit, so remove it by pulling sideward.
2. Attachment
1) Assemble front cabinet to the unit.
2) Attach the removed screws to the original
positions.
– 92 –
FILE NO. SVM-13092
No.Part name
Inverter
assembly
Procedure Remarks
1) Perform work of item 1 in .
2) Remove screw (ST1TØ4 × 10L 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) P erform discharging by connecting ,
polarity by discharging resistance (approx.
100Ω40W) or plug of soldering iron to ,
terminals a of the C07 (printed “CAUTION
HIGH VOLTAGE” is attached.) electrolytic
capacitor (760µF or 500µF) 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.
A screw
(ST1T-4x8MSZN)
Inverter cover
P.C. board
(Soldered surface)
PC. board
(Soldered surface)
NOTE
This capacitor is one with mass capacity.
Therefore, it is dangerous that a large
spark generates if short-circuiting
between ,
4) Remove screw (ST1T∅4 x 10L 4pcs.) fixing
the terminal part of inverter box to the main
body.
5) Remove the front cabinet by performing step
1 in , and remove the fixing screws
k
(ST1T∅4 x 10L) 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.
The connector is one
with lock, so remove
it while pushing the
part indicated by an
arrow.
− 93 −
Be sure to remove the connector by
holding the connector, not by pulling
the lead wire.
FILE NO. SVM-13092
No. Part name Procedures Remarks
Fan motor
„
1) Perform work of item 1 of 1 and 1 of 2.
2) Remove the flange nut fixing the fan motor
and the propeller fan.
• Flange nut is loosened by turning
clockwise.
(To tighten the flange nut, turn counterclockwise.)
3) Remove the propeller fan.
4) Disconnect the connector for the fan motor
from the inverter .
5) Remove the fixing screws (4 pcs.) holding
the fan motor by hand so that it does not
fall.
6) Cut the motor lead at the point which is
100 mm apart from the connector toward
the fan.
7) Use the connector used for the inverter,
and pinch the lead wires using the closed
end splice.
Propeller fan
Fan motor
100
Flange nut
Closed end
splice
…
†
Compressor
Reactor
1)
Perform work of item 1 of 1
ƒ
.
and
, 1 of
2
2) Extract refrigerant gas.
3) Remove the partition board.
(ST1T∅4 x 10s 3 pcs.)
4) Remove the sound-insulation material.
5) Remove the terminal cover of the
compressor, and disconnect the lead wire
of the compressor thermo and the
compressor from the terminal.
6) Remove the pipe connected to the
compressor with a burner.
• Make sure the flame does not touch the
4 way valve.
7) Remove the fixing screw of the base plate
and heat exchanger.
(ST1T∅4 x 10s 2 pcs.)
8) Pull upward the refrigeration cycle.
9) Remove the nut fixing the compressor to
the base plate.
1) Perform work of item 1 of 1, 1 of 2,
and 3.
2) Remove the screw fixing the reactor.
(ST1T∅ 4 x 10 2 PCS.)
s
Compressor
Reactor
− 94 −
FILE NO. SVM-13092
No. Part name Procedures Remarks
7
Fan guard
1. Detachment
1) Perform work of item 1 of 1 and 1 of 2.
Requirement:
Perform the work on a corrugated
cardboard, cloth, etc. to prevent
scratches to the product.
2) Remove the front cabinet, and place it
down so that the fan guard side faces
downwards.
3) Remove the hooking claws by pushing a
minus screwdriver according to the arrow
mark in the right figure, and remove the
fan guard.
2. Attachment
1) Insert the claws of the fan guard in the
hole of the front cabinet. Push the hooking
claws (8 positions) by your hand and fix
the claws.
Minus screwdriver
Hooking claw
8
Pulse Modulating
Valve coil
Requirement:
This completes all the attaching
work. Check that all the hooking
claws are fixed to the specified
positions.
1. Detachment
1) Perform work of item 1 of 1 and 1 of 2
3
and
.
2) Turn the coil by 90 degrees then remove
by pull it upward.
2. Attachment
1) Insert the coil at position which
perpendicular with pipe of PMV then turn
the coil 3 steps.
Make sure that lead wire of coil
is opposite with pipe of PMV
– 95 –
FILE NO. SVM-13092
No. Part name
9
Control board
assembly
Procedure
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)
CN31 : Outdoor fan motor (3P: white)*
(* : See Note)
CN72 : 4-way valve (2P: yellow)*
CN61 : TE sensor (2P: white)*
CN73 : PMV (6P: white)
CN64 : TS sensor (3P: white)*
CN62 :TD sensor (3P: white)*
CN63 : 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.
Remarks
CN31,CN72,CN61,CN73,CN64,
CN62 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
– 96 –
FILE NO. SVM-13092
No. P art name
10
Replacement of
temperature sensor
for servicing only
Common service
parts of sensor TO,
TS, TE, TD
Procedure
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 toward 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.
Remarks
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
– 97 –
13. EXPLODED VIEWS AND PARTS LIST
13-1. Indoor Unit (Part-E)
FILE NO. SVM-13092
Location Part Location Part
No. No. No. No.
401 43T69319 TEMPERATURE SENSOR 405 43T6V376 PC BOARD ASSY;WRS-LED
402 43T60365 TERMINAL BLOCK; 3P 406 43T6V439 PC-BOARD (RAS-077SKV-E6)
403 43T69320 TEMPERATURE SENSOR 406 43T6V448 PC-BOARD (RAS-107SKV-E6)
404 43T62003 CORD CLAMP 406 43T6V449 PC-BOARD (RAS-137SKV-E6)
Description Description
– 98 –
13-2. Indoor Unit
FILE NO. SVM-13092
Location Part Location Part
No. No. No. No.
201 43T21442 STEPPING-MOTOR 214 43T39327 BEARING BASE
202 43T21433 FAN-MOTOR 215 43T39328 MOTOR BAND (LEFT)
203 43T22312 BEARING ASSY, MOLD 216 43T39329 MOTOR BAND (RIGHT)
204 43T70316 HOSE, DRAIN(Made in Thailand) 217 43T09409 HORIZONTAL LOUVER
205 43T20328 CROSS FLOW FAN ASSEMBLY 218 43T79313 CAP, DRAIN
206 43T49359 PIPE, SHIELD 219 43T44505 REFRIGERANT CYCLE ASSEMBLY
207 43T83310 HOLDER, REMOTE CONTROL 221 43T00627 PANEL SERVICE ASSEMBLY
208 43T60382 MOTOR CORD 222 43T80327 FILTER-AIR-R
209 43T82310 INSTALLATION PLATE 223 43T80328 FILTER-AIR-L
211 43T19333 HOLDER, SENSOR 224 43T09438 GRILLE OF AIR INLET
212 43T09408 PIPE HOLDER 226 43T62328 TERMINAL COVER
213 43T03360 BACK BODY ASSEMBLY 227 43T66333 REMOTE CONTROLLER WIRELESS
Description Description
– 99 –
Loading...