Toshiba RAS-18SAV-E2, RAS-22SKV2-E, RAS-18SAV2-E, RAS-22SAV2-E, RAS-22SAV-E2 SERVICE MANUAL
...Page 1
SERVICE MANUAL
AIR-CONDITIONER
SPLIT TYPE
Indoor Unit
<High Wall, Heat Pump Type>
RAS-18, 22SKV-E
FILE NO. SVM-10050-1
RAS-18, 22SKVRRAS-18, 22SKV
RAS-18, 22SKV
E
2-E
-A
RAS-18, 22SKVR-A
RAS-18, 22SKV-ND
Outdoor Unit
<Heat Pump Type>
RAS-18, 22SAV-E2
RAS-18, 22SAV2-E
RAS-18, 22SAV2-
R410A
A
Revised on May, 2010
Page 2
FILE NO. SVM-10050
CONTENTS
1. SAFETY PRECAUTIONS .......................................................................... 3
2. SPECIFICATIONS...................................................................................... 5
3. REFRIGERANT R410A ........................................................................... 12
4. CONSTRUCTION VIEWS ........................................................................ 20
5. WIRING DIAGRAM .................................................................................. 23
6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 24
7. REFRIGERANT CYCLE DIAGRAM ........................................................ 25
8. CONTROL BLOCK DIAGRAM ................................................................ 28
9. OPERATION DESCRIPTION ................................................................... 31
10. INSTALLATION PROCEDURE ................................................................ 56
11. HOW TO DIAGNOSE THE TROUBLE ...................................................... 69
12. HOW TO REPLACE THE MAIN PARTS ................................................... 93
13. EXPLODED VIEWS AND PARTS LIST ................................................. 110
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Page 3
FILE NO. SVM-10050
1. SAFETY PRECAUTIONS
For general public use
Power supply cord of outdoor unit shall be more than 1.5 mm ² (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.
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Page 4
FILE NO. SVM-10050
• 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
REGISTERS, FURNACE, STOVES, ETC.
• WHEN MOVING THE AIR CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT TO ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY
OTHER GASEOUS BODY INTO THE REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS
MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL
BECOME ABNORMALLY HIGH AND IT MAY 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 cables and connect the terminals securely to prevent external
forces applied to the cable from affecting the terminals.
• Be sure to provide grounding.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.
• Conform to the regulations of the local electric company when wiring the power supply.
Inappropriate grounding may cause electric shock.
CAUTION
• Exposure of unit to water or other moisture 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 performed 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.
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Page 5
2. SPECIFICATIONS
2-1. Specifications
RAS-18SKV-E / RAS-18SAV-E2
RAS-22SKV-E / RAS-22SAV-E2
Unit model
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply
Electric
characteristic
COP
Sound pressure
level
Sound power
level
Indoor unit Depth (mm)
Outdoor unit
Piping
connection Gas side (mm)
Refrigerant
Wiring connection
Usable temperature range
Accessory
Indoor
Outdoor
Operation mode
Indoor
Outdoor Power consumption (W)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Unit model
Dimension Width (mm)
Net weight (kg)
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Unit model
Dimension Width (mm)
Net weight (kg)
Compressor Type
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Type
Indoor unit
Outdoor unit
Maximum length (m)
Maximum chargeless length (m)
Maximum height difference (m)
Name of refrigerant
Weight (kg)
Indoor unit
Outdoor unit
Running current (A)
Power consumption (W)
Power factor (%)
Operation mode
Running current (A)
Power factor (%)
Starting current (A)
Height (mm)
Height (mm)
Depth (mm)
Motor output (W)
Model
Liquid side (mm)
Gas side (mm)
Liquid side (mm)
Power supply
Interconnection
Indoor (Cooling/Heating) (°C)
Outdoor (Cooling/Heating) (°C)
Installation plate
Wireless remote controller
Batteries
Remote controller holder
Toshiba New IAQ filter
Mounting screw
Remote controller holder
Pan head wood screw
Plasma air purifier
Installation manual
Owner’s manual
Drain nipple
Water-proof rubber cap
FILE NO. SVM-10050
RAS-18SKV-E RAS-22SKV-E
RAS-18SAV-E2 RAS-22SAV-E2
5.0 6.0
1.1 – 6.0 1.2 – 6.7
5.8 7.0
0.8 – 6.3 1.0 – 7.5
1 Ph / 50Hz / 220 – 240V, 1 Ph / 60Hz / 220 – 230V
Cooling Heating Cooling Heating
0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35
40 40 50 50
60 60 60 60
Cooling Heating Cooling Heating
6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42
1380 1520 1945 2000
98 99 99 99
7.28-6.68 9.56-8.77
3.52 3.72 3.01 3.41
44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35
49 50 53 52
59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50
64 65 68 67
RAS-18SKV-E RAS-22SKV-E
320 320
1050 1050
228 228
13 13
30 30
15.9 / 16.5 17.7 / 18.0
RAS-18SAV-E2 RAS-22SAV-E2
550 550
780 780
290 290
41 41
Twin rotary type with DC-inverter variable speed control
1100 1100
DA130A1F-27F DA150A1F-20F
43 43
36.3 / 31.9 38.6 / 37.2
Flare connection Flare connection
Ø6.35 Ø6.35
Ø12.70 Ø12.70
Ø6.35 Ø6.35
Ø12.70 Ø12.70
20 20
15 15
10 10
R410A R410A
1.40 1.40
3 Wires: includes earth (Outdoor)
21 ~ 32 / ~ 28 21 ~ 32 / ~ 28
–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24
6 (Ø4 × 25L) 6 (Ø4 × 25L)
2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)
4 Wires: includes earth
11
11
22
11
44
—
11
11
11
22
—
• The specifications may be subject to change without notice for purpose of improvement.
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Page 6
RAS-18SKVR-E / RAS-18SAV-E2
RAS-22SKVR-E / RAS-22SAV-E2
Unit model
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply
Electric
characteristic
COP
Sound pressure
level
Sound power
level
Indoor unit Depth (mm)
Outdoor unit
Piping
connection Gas side (mm)
Refrigerant
Wiring connection
Usable temperature range
Accessory
Indoor
Outdoor
Operation mode
Indoor
Outdoor Power consumption (W)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Unit model
Dimension Width (mm)
Net weight (kg)
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Unit model
Dimension Width (mm)
Net weight (kg)
Compressor Type
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Type
Indoor unit
Outdoor unit
Maximum length (m)
Maximum chargeless length (m)
Maximum height difference (m)
Name of refrigerant
Weight (kg)
Indoor unit
Outdoor unit
Running current (A)
Power consumption (W)
Power factor (%)
Operation mode
Running current (A)
Power factor (%)
Starting current (A)
Height (mm)
Height (mm)
Depth (mm)
Motor output (W)
Model
Liquid side (mm)
Gas side (mm)
Liquid side (mm)
Power supply
Interconnection
Indoor (Cooling/Heating) (°C)
Outdoor (Cooling/Heating) (°C)
Installation plate
Wireless remote controller
Batteries
Remote controller holder
Toshiba New IAQ filter
Mounting screw
Remote controller holder
Pan head wood screw
Plasma air purifier
Installation manual
Owner’s manual
Drain nipple
Water-proof rubber cap
FILE NO. SVM-10050
RAS-18SKVR-E RAS-22SKVR-E
RAS-18SAV-E2 RAS-22SAV-E2
5.0 6.0
1.1 – 6.0 1.2 – 6.7
5.8 7.0
0.8 – 6.3 1.0 – 7.5
1 Ph / 50Hz / 220 – 240V, 1 Ph / 60Hz / 220 – 230V
Cooling Heating Cooling Heating
0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35
40 40 50 50
60 60 60 60
Cooling Heating Cooling Heating
6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42
1380 1520 1945 2000
98 99 99 99
7.28-6.68 9.56-8.77
3.52 3.72 3.01 3.41
44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35
49 50 53 52
59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50
64 65 68 67
RAS-18SKVR-E RAS-22SKVR-E
320 320
1050 1050
228 228
13 13
30 30
15.9 / 16.5 17.7 / 18.0
RAS-18SAV-E2 RAS-22SAV-E2
550 550
780 780
290 290
41 41
1100 1100
Twin rotary type with DC-inverter variable speed control
DA130A1F-27F DA150A1F-20F
43 43
36.3 / 31.9 38.6 / 37.2
Flare connection Flare connection
Ø6.35 Ø6.35
Ø12.70 Ø12.70
Ø6.35 Ø6.35
Ø12.70 Ø12.70
20 20
15 15
10 10
R410A R410A
1.40 1.40
3 Wires: includes earth (Outdoor)
4 Wires: includes earth
21 ~ 32 / ~ 28 21 ~ 32 / ~ 28
–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24
11
11
22
11
22
6 (Ø4 × 25L) 6 (Ø4 × 25L)
2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)
11
11
11
11
22
• The specifications may be subject to change without notice for purpose of improvement.
– 6 –
Page 7
RAS-18SKV2-E / RAS-18SAV2-E
RAS-22SKV2-E / RAS-22SAV2-E
Unit model
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply
Electric
characteristic
COP
Sound pressure
level
Sound power
level
Indoor unit Depth (mm)
Outdoor unit
Piping
connection Gas side (mm)
Refrigerant
Wiring connection
Usable temperature range
Accessory
Indoor
Outdoor
Operation mode
Indoor
Outdoor Power consumption (W)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Unit model
Dimension Width (mm)
Net weight (kg)
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Unit model
Dimension Width (mm)
Net weight (kg)
Compressor Type
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Type
Indoor unit
Outdoor unit
Maximum length (m)
Maximum chargeless length (m)
Maximum height difference (m)
Name of refrigerant
Weight (kg)
Indoor unit
Outdoor unit
Running current (A)
Power consumption (W)
Power factor (%)
Operation mode
Running current (A)
Power factor (%)
Starting current (A)
Height (mm)
Height (mm)
Depth (mm)
Motor output (W)
Model
Liquid side (mm)
Gas side (mm)
Liquid side (mm)
Power supply
Interconnection
Indoor (Cooling/Heating) (°C)
Outdoor (Cooling/Heating) (°C)
Installation plate
Wireless remote controller
Batteries
Remote controller holder
Toshiba New IAQ filter
Mounting screw
Remote controller holder
Pan head wood screw
Plasma air purifier
Installation manual
Owner’s manual
Drain nipple
Water-proof rubber cap
FILE NO. SVM-10050
RAS-18SKV2-E RAS-22SKV2-E
RAS-18SAV2-E RAS-22SAV2-E
5.0 6.0
1.1 – 6.0 1.2 – 6.7
5.8 7.0
0.8 – 6.3 1.0 – 7.5
1 Ph / 50Hz / 220 – 240V, 1 Ph / 60Hz / 220 – 230V
Cooling Heating Cooling Heating
0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35
40 40 50 50
60 60 60 60
Cooling Heating Cooling Heating
6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42
1380 1520 1945 2000
98 99 99 99
7.28-6.68 9.56-8.77
3.52 3.72 3.01 3.41
44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35
49 50 53 52
59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50
64 65 68 67
RAS-18SKV2-E RAS-22SKV2-E
320 320
1050 1050
228 228
13 13
30 30
15.9 / 16.5 17.7 / 18.0
RAS-18SAV2-E RAS-22SAV2-E
550 550
780 780
290 290
41 41
1100 1100
Twin rotary type with DC-inverter variable speed control
DA130A1F-27F DA150A1F-20F
43 43
36.3 / 31.9 38.6 / 37.2
Flare connection Flare connection
Ø6.35 Ø6.35
Ø12.70 Ø12.70
Ø6.35 Ø6.35
Ø12.70 Ø12.70
20 20
15 15
10 10
R410A R410A
1.40 1.40
3 Wires: includes earth (Outdoor)
4 Wires: includes earth
21 ~ 32 / ~ 28 21 ~ 32 / ~ 28
–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24
11
11
22
11
44
6 (Ø4 × 25L) 6 (Ø4 × 25L)
2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)
——
11
11
11
22
• The specifications may be subject to change without notice for purpose of improvement.
– 7 –
Page 8
RAS-18SKV-A / RAS-18SAV2-A
RAS-22SKV-A / RAS-22SAV2-A
Unit model
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply
Electric
characteristic
COP
Sound pressure
level
Sound power
level
Indoor unit Depth (mm)
Outdoor unit
Piping
connection Gas side (mm)
Refrigerant
Wiring connection
Usable temperature range
Accessory
Indoor
Outdoor
Operation mode
Indoor
Outdoor Power consumption (W)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Unit model
Dimension Width (mm)
Net weight (kg)
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Unit model
Dimension Width (mm)
Net weight (kg)
Compressor Type
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Type
Indoor unit
Outdoor unit
Maximum length (m)
Maximum chargeless length (m)
Maximum height difference (m)
Name of refrigerant
Weight (kg)
Indoor unit
Outdoor unit
Running current (A)
Power consumption (W)
Power factor (%)
Operation mode
Running current (A)
Power factor (%)
Starting current (A)
Height (mm)
Height (mm)
Depth (mm)
Motor output (W)
Model
Liquid side (mm)
Gas side (mm)
Liquid side (mm)
Power supply
Interconnection
Indoor (Cooling/Heating) (°C)
Outdoor (Cooling/Heating) (°C)
Installation plate
Wireless remote controller
Batteries
Remote controller holder
Toshiba New IAQ filter
Mounting screw
Remote controller holder
Pan head wood screw
Plasma air purifier
Installation manual
Owner’s manual
Drain nipple
Water-proof rubber cap
FILE NO. SVM-10050-1
RAS-18SKV-A RAS-22SKV-A
RAS-18SAV2-A RAS-22SAV2-A
5.0 6.0
1.1 – 6.0 1.2 – 6.7
5.8 7.0
0.8 – 6.3 1.0 – 7.5
1 Ph / 50Hz / 220 – 240V
Cooling Heating Cooling Heating
0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35
40 40 50 50
60 60 60 60
Cooling Heating Cooling Heating
6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42
1380 1520 1945 2000
98 99 99 99
7.28-6.68 9.56-8.77
3.52 3.72 3.01 3.41
44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35
49 50 53 52
59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50
64 65 68 67
RAS-18SKV-A RAS-22SKV-A
320 320
1050 1050
228 228
13 13
30 30
15.9 / 16.5 17.7 / 18.0
RAS-18SAV2-A RAS-22SAV2-A
550 550
780 780
290 290
41 41
1100 1100
Twin rotary type with DC-inverter variable speed control
DA130A1F-27F DA150A1F-20F
43 43
36.3 / 31.9 38.6 / 37.2
Flare connection Flare connection
Ø6.35 Ø6.35
Ø12.70 Ø12.70
Ø6.35 Ø6.35
Ø12.70 Ø12.70
20 20
15 15
10 10
R410A R410A
1.40 1.40
3 Wires: includes earth (Outdoor)
4 Wires: includes earth
21 ~ 32 / ~ 28 21 ~ 32 / ~ 28
–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24
11
11
22
11
44
6 (Ø4 × 25L) 6 (Ø4 × 25L)
2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)
——
11
11
11
22
• The specifications may be subject to change without notice for purpose of improvement.
– 8 –
Page 9
RAS-18SKVR-A / RAS-18SAV2-A
RAS-22SKVR-A / RAS-22SAV2-A
Unit model
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply
Electric
characteristic
COP
Sound pressure
level
Sound power
level
Indoor unit Depth (mm)
Outdoor unit
Piping
connection Gas side (mm)
Refrigerant
Wiring connection
Usable temperature range
Accessory
Indoor
Outdoor
Operation mode
Indoor
Outdoor Power consumption (W)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Unit model
Dimension Width (mm)
Net weight (kg)
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Unit model
Dimension Width (mm)
Net weight (kg)
Compressor Type
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Type
Indoor unit
Outdoor unit
Maximum length (m)
Maximum chargeless length (m)
Maximum height difference (m)
Name of refrigerant
Weight (kg)
Indoor unit
Outdoor unit
Running current (A)
Power consumption (W)
Power factor (%)
Operation mode
Running current (A)
Power factor (%)
Starting current (A)
Height (mm)
Height (mm)
Depth (mm)
Motor output (W)
Model
Liquid side (mm)
Gas side (mm)
Liquid side (mm)
Power supply
Interconnection
Indoor (Cooling/Heating) (°C)
Outdoor (Cooling/Heating) (°C)
Installation plate
Wireless remote controller
Batteries
Remote controller holder
Toshiba New IAQ filter
Mounting screw
Remote controller holder
Pan head wood screw
Plasma air purifier
Installation manual
Owner’s manual
Drain nipple
Water-proof rubber cap
FILE NO. SVM-10050-1
RAS-18SKVR-A RAS-22SKVR-A
RAS-18SAV2-A RAS-22SAV2-A
5.0 6.0
1.1 – 6.0 1.2 – 6.7
5.8 7.0
0.8 – 6.3 1.0 – 7.5
1 Ph / 50Hz / 220 – 240V
Cooling Heating Cooling Heating
0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35
40 40 50 50
60 60 60 60
Cooling Heating Cooling Heating
6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42
1380 1520 1945 2000
98 99 99 99
7.28-6.68 9.56-8.77
3.52 3.72 3.01 3.41
44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35
49 50 53 52
59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50
64 65 68 67
RAS-18SKVR-A RAS-22SKVR-A
320 320
1050 1050
228 228
13 13
30 30
15.9 / 16.5 17.7 / 18.0
RAS-18SAV2-A RAS-22SAV2-A
550 550
780 780
290 290
41 41
1100 1100
Twin rotary type with DC-inverter variable speed control
DA130A1F-27F DA150A1F-20F
43 43
36.3 / 31.9 38.6 / 37.2
Flare connection Flare connection
Ø6.35 Ø6.35
Ø12.70 Ø12.70
Ø6.35 Ø6.35
Ø12.70 Ø12.70
20 20
15 15
10 10
R410A R410A
1.40 1.40
3 Wires: includes earth (Outdoor)
4 Wires: includes earth
21 ~ 32 / ~ 28 21 ~ 32 / ~ 28
–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24
11
11
22
11
22
6 (Ø4 × 25L) 6 (Ø4 × 25L)
2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)
11
11
11
11
22
• The specifications may be subject to change without notice for purpose of improvement.
– 9 –
Page 10
RAS-18SKV-ND / RAS-18SAV2-E
RAS-22SKV-ND / RAS-22SAV2-E
Unit model
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply
Electric
characteristic
COP
Sound pressure
level
Sound power
level
Indoor unit Depth (mm)
Outdoor unit
Piping
connection Gas side (mm)
Refrigerant
Wiring connection
Usable temperature range
Accessory
Indoor
Outdoor
Operation mode
Indoor
Outdoor Power consumption (W)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Indoor H / M+ / M / L+ / L (dB-A)
Outdoor H (dB-A)
Unit model
Dimension Width (mm)
Net weight (kg)
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Unit model
Dimension Width (mm)
Net weight (kg)
Compressor Type
Fan motor output (W)
Air flow rate (Cooling/Heating) (m³/min)
Type
Indoor unit
Outdoor unit
Maximum length (m)
Maximum chargeless length (m)
Maximum height difference (m)
Name of refrigerant
Weight (kg)
Indoor unit
Outdoor unit
Running current (A)
Power consumption (W)
Power factor (%)
Operation mode
Running current (A)
Power factor (%)
Starting current (A)
Height (mm)
Height (mm)
Depth (mm)
Motor output (W)
Model
Liquid side (mm)
Gas side (mm)
Liquid side (mm)
Power supply
Interconnection
Indoor (Cooling/Heating) (°C)
Outdoor (Cooling/Heating) (°C)
Installation plate
Wireless remote controller
Batteries
Remote controller holder
Toshiba New IAQ filter
Mounting screw
Remote controller holder
Pan head wood screw
Plasma air purifier
Installation manual
Owner’s manual
Drain nipple
Water-proof rubber cap
FILE NO. SVM-10050
RAS-18SKV-ND RAS-22SKV-ND
RAS-18SAV2-E RAS-22SAV2-E
5.0 6.0
1.1 – 6.0 1.2 – 6.7
5.8 7.0
0.8 – 6.3 1.0 – 7.5
1 Ph / 50Hz / 220 – 240V, 1 Ph / 60Hz / 220 – 230V
Cooling Heating Cooling Heating
0.30 – 0.28 0.30 – 0.28 0.38 – 0.35 0.38 – 0.35
40 40 50 50
60 60 60 60
Cooling Heating Cooling Heating
6.40 – 5.87 6.98 – 6.40 8.93 – 8.19 9.18 – 8.42
1380 1520 1945 2000
98 99 99 99
7.28-6.68 9.56-8.77
3.52 3.72 3.01 3.41
44/41/38/35/32 44/41/39/35/32 47/44/41/38/35 47/44/42/38/35
49 50 53 52
59/56/53/50/47 59/56/54/50/47 62/59/56/53/50 62/59/57/53/50
64 65 68 67
RAS-18SKV-ND RAS-22SKV-ND
320 320
1050 1050
228 228
13 13
30 30
15.9 / 16.5 17.7 / 18.0
RAS-18SAV2-E RAS-22SAV2-E
550 550
780 780
290 290
41 41
1100 1100
Twin rotary type with DC-inverter variable speed control
DA130A1F-27F DA150A1F-20F
43 43
36.3 / 31.9 38.6 / 37.2
Flare connection Flare connection
Ø6.35 Ø6.35
Ø12.70 Ø12.70
Ø6.35 Ø6.35
Ø12.70 Ø12.70
20 20
15 15
10 10
R410A R410A
1.40 1.40
3 Wires: includes earth (Outdoor)
4 Wires: includes earth
21 ~ 32 / ~ 28 21 ~ 32 / ~ 28
–10 ~ 46 / –15 ~ 24 –10 ~ 46 /–15 ~ 24
11
11
22
11
44
6 (Ø4 × 25L) 6 (Ø4 × 25L)
2 (Ø3.1L × 16L) 2 (Ø3.1L × 16L)
——
11
11
11
22
• The specifications may be subject to change without notice for purpose of improvement.
– 10 –
Page 11
2-2. Operation Characteristic Curve
<Cooling> <Heating>
FILE NO. SVM-10050
10.00
9.00
8.00
7.00
6.00
5.00
Current (A)
4.00
3.00
2.00
1.00
0.00
0 102030405060708090100110120 0 102030405060708090100110120
RAS-22SKV-E
RAS-22SKVR-E
RAS-22SKV2-E
RAS-22SKV-A
RAS-22SKVR-A
RAS-22SKV-ND
RAS-18SKV-E
RAS-18SKVR-E
RAS-18SKV2-E
RAS-18SKV-A
RAS-18SKVR-A
RAS-18SKV-ND
Compressor Speed (RPS)
10.00
9.00
8.00
7.00
6.00
5.00
Current (A)
4.00
3.00
2.00
1.00
0.00
RAS-22SKV-E
RAS-22SKVR-E
RAS-22SKV2-E
RAS-22SKV-A
RAS-22SKVR-A
RAS-22SKV-ND
RAS-18SKV-E
RAS-18SKVR-E
RAS-18SKV2-E
RAS-18SKV-A
RAS-18SKVR-A
RAS-18SKV-ND
Compressor Speed (RPS)
2-3. Capacity Variation Ratio According to Temperature
<Cooling> <Heating>
105
100
95
90
85
80
75
70
Capacity Ratio (%)
65
60
Capacity Ratio: 100% =
5.0kW (RAS-18SKV-E, RAS-18SKVR-E, RAS-18SKV2-E,
RAS-18SKV-A, RAS-18SKVR-A, RAS-18SKV-ND)
55
6.0kW (RAS-22SKV-E, RAS-22SKVR-E, RAS-22SKV2-E,
RAS-22SKV-A, RAS-22SKVR-A, RAS-22SKV-ND)
50
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 –15
RAS-18SKV-E
RAS-18SKVR-E
RAS-18SKV2-E
RAS-18SKV-A
RAS-18SKVR-A
RAS-18SKV-ND
RAS-22SKV-E
RAS-22SKVR-E
RAS-22SKV2-E
RAS-22SKV-A
RAS-22SKVR-A
RAS-22SKV-ND
Condition
Indoor: DB27°C/WB19°C
Indoor Air-Flow Volume: High
Pipe Length: 7.5m
Outdoor Temperature (°C)
120
100
80
60
Capacity Ratio (%)
40
20
0
RAS-18SKV-E
RAS-18SKVR-E
RAS-18SKV2-E
RAS-18SKV-A
RAS-18SKVR-A
RAS-18SKV-ND
RAS-22SKV-E
RAS-22SKVR-E
RAS-22SKV2-E
RAS-22SKV-A
RAS-22SKVR-A
RAS-22SKV-ND
Condition
Indoor: DB20°C
Indoor Air-Flow Volume: High
Pipe Length: 7.5m
Capacity Ratio: 100% =
kW (RAS-18SKV-E, RAS-18SKVR-E, RAS-18SKV2-E,
5.8
RAS-18SKV-A, RAS-18SKVR-A, RAS-18SKV-ND)
7.0kW (RAS-22SKV-E, RAS-22SKVR-E, RAS-22SKV2-E,
RAS-22SKV-A, RAS-22SKVR-A, RAS-22SKV-ND)
–10–50 510
Outdoor Temperature (°C)
– 11 –
Page 12
3. REFRIGERANT R410A
FILE NO. SVM-10050
This air conditioner adopts the new refrigerant HFC
(R410A) which does not damage the ozone layer.
The working pressure of the new refrigerant R410A
is 1.6 times higher than conventional refrigerant
(R22). The refrigerating oil is also changed in
accordance with change of refrigerant, so be careful
that water, dust, and existing refrigerant or
refrigerating oil are not entered in the refrigerant
cycle of the air conditioner using the new refrigerant
during installation work or servicing time.
The next section describes the precautions for air
conditioner using the new refrigerant. Conforming
to contents of the next section together with the
general cautions included in this manual, perform
the correct and safe work.
3-1. Safety During Installation/Servicing
As R410A’s pressure is about 1.6 times higher than
that of R22, improper installation/servicing may
cause a serious trouble. By using tools and
materials exclusive for R410A, it is necessary to
carry out installation/servicing safely while taking
the following precautions into consideration.
1. Never use refrigerant other than R410A in an air
conditioner which is designed to operate with
R410A.
If other refrigerant than R410A is mixed,
pressure in the refrigeration cycle becomes
abnormally high, and it may cause personal
injury, etc. by a rupture.
2. Confirm the used refrigerant name, and use
tools and materials exclusive for the refrigerant
R410A.
The refrigerant name R410A is indicated on the
visible place of the outdoor unit of the air conditioner using R410A as refrigerant. To prevent
mischarging, the diameter of the service port
differs from that of R22.
3. If a refrigeration gas leakage occurs during
installation/servicing, be sure to ventilate fully.
If the refrigerant gas comes into contact with fire,
a poisonous gas may occur.
4. When installing or removing an air conditioner,
do not allow air or moisture to remain in the
refrigeration cycle. Otherwise, pressure in the
refrigeration cycle may become abnormally high
so that a rupture or personal injury may be
caused.
5. After completion of installation work, check to
make sure that there is no refrigeration gas
leakage.
If the refrigerant gas leaks into the room, coming
into contact with fire in the fan-driven heater,
space heater, etc., a poisonous gas may occur.
6. When an air conditioning system charged with a
large volume of refrigerant is installed in a small
room, it is necessary to exercise care so that,
even when refrigerant leaks, its concentration
does not exceed the marginal level.
If the refrigerant gas leakage occurs and its
concentration exceeds the marginal level, 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 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
must be chosen and installed.
Furthermore, it is necessary to use clean copper
pipes and joints whose interior surfaces are less
affected by contaminants.
1. Copper Pipes
It is necessary to use seamless copper pipes
which are made of either copper or copper alloy
and it is desirable that the amount of residual oil
is less than 40 mg/10 m.
Do not use copper pipes having a collapsed,
deformed or discolored portion
(especially on the interior surface).
Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary
to choose adequate materials.
Thicknesses of copper pipes used with R410A
are as shown in Table 3-2-1.
Never use copper pipes thinner than 0.8 mm
even when it is available on the market.
– 12 –
Page 13
Table 3-2-1 Thicknesses of annealed copper pipes
Thickness (mm)
FILE NO. SVM-10050
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 socket joints are as shown in Table 3-2-2.
Table 3-2-2 Minimum thicknesses of socket joints
Nominal diameter
1/4
3/8
1/2
5/8
Reference outer diameter of
copper pipe jointed (mm)
6.35
9.52
12.70
15.88
Minimum joint thickness
(mm)
0.50
0.60
0.70
0.80
3-2-2. Processing of Piping Materials
When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not
enter the pipe interior, that no other oil than lubricating oils used in the installed air-water heat pump is used,
and that refrigerant does not leak.
When using lubricating oils in the piping processing, use such lubricating oils whose water content has been
removed. When stored, be sure to seal the container with an airtight cap or any other cover.
1. Flare processing procedures and precautions
a) Cutting the Pipe
By means of a pipe cutter, slowly cut the pipe so that it is not deformed.
b) Removing Burrs and Chips
If the flared section has chips or burrs, refrigerant leakage may occur.
Carefully remove all burrs and clean the cut surface before installation.
c) Insertion of Flare Nut
– 13 –
Page 14
A
ØD
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 “dimension A” by using a gauge for
size adjustment.
Table 3-2-3 Dimensions related to flare processing for R410A
FILE NO. SVM-10050
Fig. 3-2-1 Flare processing dimensions
Nominal
diameter
1/4 6.35 0.8
3/8 9.52 0.8
1/2 12.70 0.8
5/8 15.88 1.0
Nominal
diameter
1/4 6.35 0.8
3/8 9.52 0.8
Outer
diameter
(mm)
Table 3-2-4 Dimensions related to flare processing for R22
Outer
diameter
(mm)
Thickness
(mm)
Thickness
(mm)
Flare tool for R410A
clutch type
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
A (mm)
Conventional flare tool
Clutch type Wing nut type
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
1/2 12.70 0.8
5/8 15.88 1.0
Table 3-2-5 Flare and flare nut dimensions for R410A
Nominal Outer diameter Thickness
diameter (mm) (mm)
1/4 6.35 0.8
3/8 9.52 0.8
1/2 12.70 0.8
5/8 15.88 1.0
– 14 –
0 to 0.5
0 to 0.5
Dimension (mm)
ABCD
9.1 9.2 6.5 13
13.2 13.5 9.7 20
16.0 16.6 12.9 23
19.0 19.7 16.0 25
0.5 to 1.0 1.5 to 2.0
0.5 to 1.0 1.5 to 2.0
Flare nut width
(mm)
17
22
26
29
Page 15
Table 3-2-6 Flare and flare nut dimensions for R22
FILE NO. SVM-10050
Nominal Outer diameter Thickness
diameter (mm) (mm)
1/4 6.35 0.8
3/8 9.52 0.8
1/2 12.70 0.8
5/8 15.88 1.0
3/4 19.05 1.0
45˚ to 46˚
B A
Dimension (mm)
ABCD
9.0 9.2 6.5 13
13.0 13.5 9.7 20
16.0 16.2 12.9 20
19.0 19.7 16.0 23
23.3 24.0 19.2 34
D
C
43˚ to 45˚
Flare nut width
(mm)
17
22
24
27
36
Fig. 3-2-2 Relations between flare nut and flare seal surface
2. Flare Connecting Procedures and Precautions
a) Make sure that the flare and union portions do not have any scar or dust, etc.
b) Correctly align the processed flare surface with the union axis.
c) Tighten the flare with designated torque by means of a torque wrench.
The tightening torque for R410A is the same as that for conventional R22.
Incidentally, when the torque is weak, the gas leakage may occur.
When it is strong, the flare nut may crack and may be made non-removable.
When choosing the tightening torque, comply with values designated by manufacturers.
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)
1/4 6.35 14 to 18 (140 to 180)
torque wrenches available on the market
Tightening torque of
N•m (kgf•cm)
16 (160), 18 (180)
3/8 9.52 33 to 42 (330 to 420)
1/2 12.70 50 to 62 (500 to 620)
5/8 15.88 63 to 77 (630 to 770)
– 15 –
42 (420)
55 (550)
65 (650)
Page 16
FILE NO. SVM-10050
3-3. Tools
3-3-1. Required Tools
The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is
changed to prevent mixing of other refrigerant.
To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare
nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.
The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,
clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.
1. Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
2. Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
3. Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.
Tools exclusive for R410A (The following tools for R410A are required.)
Tools whose specifications are changed for R410A and their interchangeability
No.
1
2
3
4
5
6
7
8
9
10
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
Usage
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
air-water heat pump installation
R410A
Existence of Whether conventional
new equipment equipment can be
for R410A used
Ye s ∗ (Note 1)
Ye s ∗ (Note 1)
Ye s N o
Ye s N o
Ye s N o
Ye s N o
Ye s N o
Ye s N o
∗ (Note 2) No
Conventional air-water
heat pump installation
Whether new equipment
can be used with
conventional refrigerant
Ye s
∗ (Note 1)
No
No
Ye s
Ye s
No
Ye s
No
(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
(Note 2) Charging cylinder for R410A is being currently developed.
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
– 16 –
Page 17
FILE NO. SVM-10050
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
– 17 –
Page 18
FILE NO. SVM-10050
1. Be sure to make setting so that liquid can be charged.
2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.
It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.
Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the
cylinder upside down if cylinder is not equipped with siphon.
[ Cylinder with siphon ] [ Cylinder without siphon ]
Gauge manifold
OUTDOOR unit
Refrigerant
cylinder
Gauge manifold
OUTDOOR unit
cylinder
Refrigerant
Electronic
balance
R410A refrigerant is HFC mixed refrigerant.
Therefore, if it is charged with gas, the composition of the charged refrigerant changes and the
characteristics of the equipment varies.
3-5. Brazing of Pipes
3-5-1. Materials for Brazing
1. Silver brazing filler
Silver brazing filler is an 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.
– 18 –
Page 19
Nitrogen gas
cylinder
Pipe
Flow meter
M
Stop valve
From Nitrogen cylinder
Nitrogen gas
Rubber plug
FILE NO. SVM-10050
2. Characteristics required for flux
• Activated temperature of flux coincides with
the brazing temperature.
• Due to a wide effective temperature 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 oxide film removing
capability due to the addition of compounds
such as potassium fluoride, potassium chloride
and sodium fluoride to the borax-boric acid
compound.
4. Piping materials for brazing and used
brazing filler/flux
3-5-3. Brazing
As brazing work requires sophisticated techniques,
experiences based upon a theoretical knowledge, it
must be performed by a person qualified.
In order to prevent 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
3
is lower than 0.05 m
/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
1. Do not enter flux into the refrigeration cycle.
2. When chlorine contained in the flux remains
3. When adding water to the flux, use water
4. Remove the flux after brazing.
Copper - Iron
Iron - Iron
Used brazing filler
Phosphor copper
Silver
Silver
Used flux
Do not use
Paste flux
Vapor flux
within the pipe, the lubricating oil deteriorates. Therefore, use a flux which does not
contain chlorine.
which does not contain chlorine
(e.g. distilled water or ion-exchange water).
Fig. 3-5-1
Prevention of oxidation during brazing
– 19 –
Page 20
4-1. Indoor Unit
RAS-18SKVR-E, RAS-22SKVR-E
RAS-18SKVR-A, RAS-22SKVR-A
FILE NO. SVM-10050
4. CONSTRUCTION VIEWS
1050
Front panel
73.5
7
50
Knock out system Knock out system
Air filter
320
Heat exchanger
Installation plate hanger
132 568
Air inlet Plasma air purifier
Air ionizer
72
78
200 150
50
228
50
7
56
73.5
157
19
Installation plate hanger
Connecting plate (0.39m)
(For 18, 22 series; Flare Ø12.70mm)
132
85
320
40
47 215.5 262.5 262.5 153.5 109
Center line Instrallation plate outline
Drain hose
(0.5mm)
786 132
235 235
215 215
Hanger
Wireless remote controller
125
Connecting pipe (0.49m)
(Flare Ø6.35mm)
23
40
HangerHanger
63
Remote controller holder
26
– 20 –
Page 21
RAS-18SKV-E, RAS-22SKV-E
RAS-18SKV-A, RAS-22SKV-A
RAS-18SKV-ND, RAS-22SKV-ND
RAS-18SKV2-E, RAS-22SKV2-E
FILE NO. SVM-10050
1050
Front panel
73.5
7
50
Knock out system Knock out system
Air filter
320
Heat exchanger
Installation plate hanger
132 568 200 150
Air inlet
228
50
50
72 78
56
Wireless remote controller
73.5
7
157
19
Installation plate hanger
Connecting plate (0.39m)
(For 18, 22 series; Flare Ø12.70mm)
132 786
85
320
40
47 215.5 262.5 262.5 153.5 109
235
215 215
Hanger
Hanger
Drain hose
(0.5mm)
235
Hanger
Connecting pipe (0.49m)
(Flare Ø6.35mm)
132
23
40
125
63
Remote controller holder
26
Center line Instrallation plate outline
– 21 –
Page 22
4-2. Outdoor Unit
28
FILE NO. SVM-10050
A
108 125
600
320
50
36
306
R5.5
R
Ø
15
6 hole
A detail Drawing (Back leg)
290
86
320
FAN-GUARD
436
Ø
550
275
Ø
25 Drain outlet
2
-
Ø
11 x 14
(For 8 -
Ø
Hole
10 anchor bolt)
Ø
80
306
320
Ø
6 hole
11x14 hole
Ø
36
50
R
15
B Detail Drawing (Front leg)
COVER-PV
Z
9060090
69
320
342
100 or more
320
100 or more
Air outlel
Z View
600
Air intlel
600 or more
137
92
2 - R5-5 x 17L Ushape
(For ∅ 8 - ∅10 anchor bolt)
600 or more
2 - ∅11 x 14 Long holes (For ∅8- ∅10 anchor bolt)
Electrical part cover
Liquid side
(Flare 6.35)
Ø
Gas side
(Flare ∅ 12.7)
5
4
Service port
Installation dimension
– 22 –
Page 23
5-1. Indoor Unit / Outdoor Unit
FILE NO. SVM-10050-1
5. WIRING DIAGRAM
Compressor
CM
Reactor
Ion
Electrode
High-voltage
Power Supply
4433221
P04
RED
1
2
3
YEL
YEL
BRW
YEL
ORN
121
1
2
3
2
P05
WHI
P06
BLK
P25
P24
P23
P22
P21
P20
P35 L03
P34
P19
P18
P11
P08
P33 P30 BLK
DB01
Q404
P32
PUR
SKVR-E only
1
121
343
Air Purifier
Electrode
RED
BRW
2
BRW
BRW
4
121
343
Micro
SW
BLU
221
CN42
(WHI)
2
4
Q200 ~ 205
IGBT
Power Relay
DB02
P31
Reactor
BRW
1
R221
R220
R219
+ + +
C12 C14
CT
Relay
CN701 P07
112
2
Sheet
Metal
BLK
F01 Fuse
T3.15A
AC 250V
Q300 ~ 305
MOS-FET
R321
R320
R319
C13
P. C. Board
MCC-5009
F03 Fuse
250V ~, T3.15A
L01
Varistor
Varistor
Surge
Absorber
11223
3
Fuse, T6.3A
AC 250V
Coil for
4-way Valve
Indoor Terminal Block
113
CN01CN02 CN51
F01 Fuse
250V ~, T25A
BLK
WHI
CN300
CN700
CN603
CN602
CN601
CN600
P10
P03
BLK
ORN WHI
321
RED
P02
N
NL321
Power Supply
220-240V~, 50Hz / 220-230V~, 60Hz
220-240V~, 50Hz (RAS-18,22SKV-A, 18,22SKVR-A)
Heat Exchanger
3
2
1
6
5
4
3 3
2 2
1 1
3
2
1
212
3
2
1
212
GRN & YEL
BLK
3
WHI
2
1
6
5
4
3
2
1
1
3
2
1
1
FM
RED
Fan Motor
PMV
Pulse Motor Valve
Suction pipe
Temp. Sensor
Temp. Sensor
Discharge pipe
Temp. Sensor
Condenser pipe
Temp. Sensor
(TS)
(TO)
Outdoor
(TD)
(TE)
Heat Exchanger Sensor (TC)
Thermo Sensor (TA)
1
2
3
CN10
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
WHI
1
2
3
4 4
5 5
6 6
7 7
8 8
MCC-5044
9 9
10 10
Wireless Unit Assembly
11 11 11 11
(WHI)
121
121
1
2
3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
CN21
(WHI)
CN62
(BLU)
2
CN61
2
(WHI)
1
2
3
Line Filter
Main P. C. Board
MCC-5045
Varistor
– 23 –
1
1
2
2
3
3
4 4
CN31
5 5
(WHI)
6 6
WHI
1
Circuit
2
3
4
5 5
1
2
3
4
1
2
3
4
CN22
(WHI)
CN32
(WHI)
~
+
~
DC5V
DC12V
+
Power Supply
YEL
YEL
YEL
YEL
1
2
3
4 4
5 5
Fan Motor
DC Motor
1
2
3
Louver Motor
Page 24
6-1. Indoor Unit
FILE NO. SVM-10050
6. SPECIFICATIONS OF ELECTRICAL PARTS
No.
1
Fan motor (for indoor)
2
Room temp. sensor (TA-sensor)
3
Heat exchanger temp. sensor (TC-sensor)
4
Louver motor
6-2. Outdoor Unit
No.
1
Reactor
2
Outdoor fan motor
3
Suction temp. sensor (TS sensor)
Parts name
Parts name
Type
ICF-340-30-2Β
( — )
( — )
MP24Z3T
Model name
CH-57
ICF-140-43-4R
(Inverter attached)
Specifications
DC340V, 30W
10kΩ at 25°C
10kΩ at 25°C
Output (Rated) 1W, 16 poles, DC12V
Rating
L = 10mH, 16A
DC140V, 43W
10kΩ (25°C)
4
Discharge temp. sensor (TD sensor)
5
Outside air temp. sensor (TO sensor)
6
Heat exchanger temp. sensor (TE sensor)
7
Terminal block (5P)
18SAV-E2, 18SAV2-E,
8
Compressor
9
Coil for PMV
10
Coil for 4-way valve
18SAV2-A
22SAV-E2, 22SAV2-E,
22SAV2-A
(Inverter attached)
(Inverter attached)
(Inverter attached)
——
DA130A1F-27F
DA150A1F-20F
CAM-MD12TCTH-2
STF
62kΩ (20°C)
10kΩ (25°C)
10kΩ (25°C)
20A, AC250V
3-phases 4-poles 1100W
DC12V
AC220–240V
– 24 –
Page 25
7. REFRIGERANT CYCLE DIAGRAM
7-1. Refrigerant Cycle Diagram
RAS-18SKV-E / RAS-18SAV-E2
RAS-18SKVR-E / RAS-18SAV-E2
RAS-18SKV2-E / RAS-18SAV2-E
RAS-18SKV-A / RAS-18SAV2-A
RAS-18SKVR-A / RAS-18SAV2-A
RAS-18SKV-ND / RAS-18SAV2-E
FILE NO. SVM-10050
P
Pressure measurement
Gauge attaching port
Vacuum pump connecting port
Deoxidized copper pipe
Outer dia. : 12.7mm
Thickness : 0.8mm
4-way valve
(STF-0108Z)
Accumulater tank
Deoxidized copper pipe
Outer dia. : 6.35mm
Thickness : 0.8mm
Muffler
Muffler
Compressor
DA130A1F-27F
INDOOR UNIT
Indoor heat
exchanger
Cross flow fan
Sectional shape
of heat insulator
TD
T1 Temp. measurement
TC
TA
difference: 10m
Allowable height
Strainer
Pulse Modulating valve
at liquid side
(CAM-B22YGTF-3)
Max. : 20m
Min. : 2m
Chargeless : 15m
Charge : 20g/m
(16 to 20m)
Allowable pipe length
TS
TO
Outdoor heat
exchanger
Propeller fan
Split capillary
2-dia. 1.2 × 80
TE
Distributor
OUTDOOR UNIT
Refrigerant amount: 1.40kg
NOTE:
Refrigerant flow (Cooling)
Refrigerant flow (Heating)
Gas leak check position
NOTE :
• The maximum pipe length of this air conditioner is 20m. When the pipe length exceeds 15m, the additional
charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 100g)
– 25 –
Page 26
RAS-22SKV-E / RAS-22SAV-E2
RAS-22SKVR-E / RAS-22SAV-E2
RAS-22SKV2-E / RAS-22SAV2-E
RAS-22SKV-A / RAS-22SAV2-A
RAS-22SKVR-A / RAS-22SAV2-A
RAS-22SKV-ND / RAS-22SAV2-E
FILE NO. SVM-10050
P
Pressure measurement
Gauge attaching port
Vacuum pump connecting port
Deoxidized copper pipe
Outer dia. : 12.7mm
Thickness : 0.8mm
4-way valve
0213Z
(STF-
Accumulater tank
)
Deoxidized copper pipe
Outer dia. : 6.35mm
Thickness : 0.8mm
Muffler
Muffler
Compressor
DA150A1F-20F
INDOOR UNIT
Indoor heat
exchanger
Cross flow fan
Sectional shape
of heat insulator
TD
T1 Temp. measurement
TC
TA
difference: 10m
Allowable height
Strainer
Pulse Modulating valve
at liquid side
(CAM-B22YGTF-3)
Max. : 20m
Min. : 2m
Chargeless : 15m
Charge : 20g/m
(16 to 20m)
Allowable pipe length
TS
TO
Split capillary
Outdoor heat
exchanger
Propeller fan
OUTDOOR UNIT
1 -dia. 2 × 100
2 - 4 -dia. 2 × 66
1
2
3
4
Distributor
TE
NOTE:
Refrigerant flow (Cooling)
Refrigerant flow (Heating)
Gas leak check position
NOTE :
• The maximum pipe length of this air conditioner is 15m. When the pipe length exceeds 15m, the additional
charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 100g)
– 26 –
Page 27
7-2. Operation Data
<Cooling>
FILE NO. SVM-10050
Temperature
condition (°C)
Indoor Outdoor
27/19 35/24
<Heating>
Temperature
condition (°C)
Indoor Outdoor
20/15 7/6
Model name
RAS-
18SKV-E
18SKV2-E
18SKV-A
18SKV-ND
18SKVR-E
18SKVR-A
22SKV-E
22SKV2-E
22SKV-A
22SKV-ND
22SKVR-E
22SKVR-A
Model name
RAS-
18SKV-E
18SKV2-E
18SKV-A
18SKV-ND
18SKVR-E
18SKVR-A
22SKV-E
22SKV2-E
22SKV-A
22SKV-ND
22SKVR-E
22SKVR-A
Standard
pressure
P (MPa)
0.9 to 1.1
0.9 to 1.1
0.9 to 1.1
0.9 to 1.1 High 77
Standard
pressure
P (MPa)
2.5 to 2.6
2.5 to 2.6
2.6 to 2.8
2.6 to 2.8
Heat exchanger
pipe temp.
T1 (°C) T2 (°C)
11 to 13 40 to 42
11 to 13 40 to 42
11 to 13 41 to 43
11 to 13 41 to 43 High
Heat exchanger
pipe temp.
T1 (°C) T2 (°C)
40 to 42 1 to 3
40 to 42 1 to 3
42 to 44 0 to 2
42 to 44 0 to 2 High High
Indoor
fan mode
High
High
High
Indoor
fan mode
High
High
High
Outdoor
fan mode
High
High
High
Outdoor
fan mode
High
High
High
Compressor
revolution
Compressor
revolution
(rps)
67
67
77
(rps)
79
79
84
84
NOTES :
1. Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent.
(Thermistor themometer)
2. Connecting piping condition : 7.5 m
– 27 –
Page 28
8. CONTROL BLOCK DIAGRAM
8-1. Indoor Unit
RAS-18SKV-E, RAS-18SKV2-E, RAS-18SKV-A, RAS-18SKV-ND
RAS-22SKV-E, RAS-22SKV2-E, RAS-22SKV-A, RAS-22SKV-ND
FILE NO. SVM-10050-1
Heat Exchanger Sensor (Tc)
Room Temperature Sensor (Ta)
Infrared Rays Signal Receiver
and Indication
Initializing Circuit
Clock Frequency
Oscillator Circuit
Power Supply Circuit
Converter (D.C circuit)
Noise Filter
From Outdoor Unit
220-240V ~50Hz
220-230V ~60Hz
220-240V~, 50Hz (RAS-18,22SKV-A)
M.C.U.
Functions
• Cold draft preventing Function
• 3-minute Delay at Restart
for Compressor
• Fan Motor Starting Control
• Processing
(Temperature Processing)
• Timer
• Serial Signal Communication
• Clean Function
Serial Signal Transmitter/Receiver
Serial Signal Communication
(Operation Command and Information)
Indoor Unit Control Unit
Louver
Motor
Louver Motor
Drive Control
Indoor Fan
Motor Control
Indoor
Fan Motor
REMOTE CONTROLLER
Remote Controller
Infrared Rays, 36.7kHz
Operation (START/STOP)
Operation Mode Selection
AUTO, COOL, DRY, HEAT, FAN
Thermo. Setting
Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
Louver AUTO Swing
Louver Direction Setting
ECO
Hi-POWER
COMFORT SLEEP
QUIET
QUIET
SLEEP (1, 3, 5, 9 OFF TIMER)
– 28 –
Page 29
RAS-18SKVR-E, RAS-18SKVR-A, RAS-22SKVR-E, RAS-22SKVR-A
FILE NO. SVM-10050-1
Heat Exchanger Sensor (Tc)
Room Temperature Sensor (Ta)
Infrared Rays Signal Receiver
and Indication
Initializing Circuit
Clock Frequency
Oscillator Circuit
Power Supply Circuit
Converter (D.C circuit)
Noise Filter
M.C.U.
Functions
• Cold draft preventing Function
• 3-minute Delay at Restart
for Compressor
• Fan Motor Starting Control
• Processing
(Temperature Processing)
• Timer
• Serial Signal Communication
• Clean Function
Serial Signal Transmitter/Receiver
Indoor Unit Control Unit
Louver Motor
Drive Control
Indoor Fan
Motor Control
Louver
Motor
Indoor
Fan Motor
Air purifier
unit
Micro Switch
From Outdoor Unit
220-240V~, 50Hz
220-230V~, 60Hz
220-240V~, 50Hz (RAS-18,22SKVR-A)
REMOTE CONTROLLER
Serial Signal Communication
(Operation Command and Information)
Remote Controller
Infrared Rays, 36.7kHz
Operation (START/STOP)
Operation Mode Selection
AUTO, COOL, DRY, HEAT, FAN
Thermo. Setting
Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
Louver AUTO Swing
Louver Direction Setting
ECO
Hi-POWER
COMFORT SLEEP
QUIET
QUIET
SLEEP (1, 3, 5, 9 OFF TIMER)
PURE (Air purifier)
– 29 –
Page 30
8-2. Outdoor Unit (Inverter Assembly)
OUTDOOR UNIT
Outdoor
Fan motor
FILE NO. SVM-10050-1
Compressor
MICRO-COMPUTER BLOCK DIAGRAM
MCC5009 (P.C.B)
detect
Current
M.C.U.
circuit
Gate drive
• PWM synthesis function
• Input current release control
• IGBT over-current detect control
detect
Current
• Outdoor fan control
• High power factor correction control
• Inverter output frequency control
• A/D converter function
• PMV control
circuit
Gate drive
• Discharge temp. control
• 4-way valve control
• Signal communication to indoor unit
Inverter
(DC → AC)
Clock
4MHz
frequency
circuit
High Power
factor Correction
Inverter
(DC → AC)
Relay
Converter
(AC → DC)
Driver circuit
sensor
Input current
circuit
of PMV
PMV : Pulse Motor Valve
M.C.U.: Micro Control Unit
valve
4-way
PMV
220-240V~, 50Hz
220-230V~, 60Hz
For INDOOR UNIT
220-240V~, 50Hz (RAS-18,22SAV2-A)
circuit
Indoor unit
send/receive
Discharge
temp. sensor
Outdoor air
Suction
temp. sensor
– 30 –
temp. sensor
temp.sensor
Heat exchanger
Filter
Noise
Page 31
9. OPERATION DESCRIPTION
FILE NO. SVM-10050
9-1. Outline of Air Conditioner Control
This air conditioner is a capacity-variable type air
conditioner, which uses DC motor for the indoor fan
motor and the outdoor fan motor. And the capacityproportional control compressor which can change the
motor speed in the range from 11 to 120 rps is
mounted. The DC motor drive circuit is mounted to the
indoor unit. The compressor and the inverter to control
fan motor are mounted to the outdoor unit.
The entire air conditioner is mainly controlled by the
indoor unit controller.
The indoor unit controller drives the indoor fan motor
based upon command sent from the remote controller,
and transfers the operation command to the outdoor
unit controller.
The outdoor unit controller receives operation command from the indoor unit side, and controls the
outdoor fan and the pulse motor valve. (PMV)
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
• PMV control
• 4-way valve control
Operations followed to judgment
of serial signal from indoor side.
• Detection of inverter input current and current
release operation
• Over-current detection and prevention operation
to IGBT module (Compressor stop function)
• Compressor and outdoor fan stop function when
serial signal is off (when the serial signal does not
reach the board assembly of outdoor control by
trouble of the signal system)
• Transferring of operation information (Serial
signal) from outdoor unit controller to indoor unit
controller
• Detection of outdoor temperature and operation
revolution control
• Defrost control in heating operation (Temp.
measurement by outdoor heat exchanger and
control for 4-way valve and outdoor fan)
3. Contents of operation command signal
(Serial signal) from indoor unit controller to
outdoor unit controller
The following three types of signals are sent from
the indoor unit controller.
• Operation mode set on the remote controller
• Compressor revolution command signal defined
by indoor temperature and set temperature
(Correction along with variation of room temperature and correction of indoor heat exchanger
temperature are added.)
• Temperature of indoor heat exchanger
• For these signals ([Operation mode] and [Com-
pressor revolution] indoor heat exchanger temperature), the outdoor unit controller monitors the
input current to the inverter, and performs the
followed operation within the range that current
does not exceed the allowable value.
4. Contents of operation command signal
(Serial signal) from outdoor unit controller
to indoor unit controller
The following signals are sent from the outdoor unit
controller.
• The current operation mode
• The current compressor revolution
• Outdoor temperature
• Existence of protective circuit operation
For transferring of these signals, the indoor unit
controller monitors the contents of signals, and
judges existence of trouble occurrence.
Contents of judgment are described below.
• Whether distinction of the current operation
status meets to the operation command signal
• Whether protective circuit operates
When no signal is received from the outdoor
unit controller, it is assumed as a trouble.
– 31 –
Page 32
FILE NO. SVM-10050
9-2. Operation Description
9-2. 1. Basic operation ........................................................................................................... 33
1. Operation control ................................................................................................... 33
2. Cooling/Heating operation ..................................................................................... 34
3. AUTO operation...................................................................................................... 34
4. DRY operation ........................................................................................................ 34
2. Indoor fan motor control.............................................................................................. 35
3. Outdoor fan motor control ........................................................................................... 37
4. Capacity control .......................................................................................................... 38
5. Current release control ............................................................................................... 38
6. Release protective control by temperature of indoor heat exchanger ........................ 39
7. Defrost control (Only in heating operation)................................................................. 40
8. Louver control ............................................................................................................. 41
1) Louver position....................................................................................................... 41
2) Air direction adjustment ......................................................................................... 41
3) Swing ..................................................................................................................... 41
9. ECO operation ............................................................................................................ 42
10. Temporary operation................................................................................................... 43
11. Air purifying control ..................................................................................................... 43
Air purifying control [Detection of abnormality]........................................................... 44
12. Pulse motor valve (PMV) control ................................................................................ 45
13. Self-Cleaning function ................................................................................................ 46
14. Remote Controller-A or B selection ............................................................................ 47
15. QUIET mode ............................................................................................................... 48
16. COMFORT SLEEP ..................................................................................................... 48
17. Short Timer ................................................................................................................. 48
18. One Touch Comfort ..................................................................................................... 49
19. Hi POWER Mode ........................................................................................................ 49
20. FILTER Indicator ......................................................................................................... 49
9-3. Auto Restart Function.............................................................................................50
9-3-1. How to Set the Auto Restart Function .................................................................... 50
9-3-2. How to Cancel the Auto Restart Function.............................................................. 51
9-3-3. Power Failure during Timer Operation.................................................................... 51
9-4. Remote Controller ...................................................................................................52
9-4-1. Remote Controller and Its Functions ..................................................................... 52
9-4-2. Operation of Remote Controller .............................................................................. 52
9-4-3. Names and Functions of Indications on Remote Controller ................................ 55
– 32 –
Page 33
FILE NO. SVM-10050
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 motor valve.
Selection of
operation conditions
ON/OFF
Remote controller
Control contents of remote controller
• ON/OFF (Air conditioner / Air purifier)
• Operation select (COOL /HEAT / AUTO / DRY)
• Temperature setup
• Air direction
• Swing
• Air volume select
(AUTO / LOW / LOW+ / MED / MED+ / HIGH)
• ECO • COMFORT SLEEP
• ON timer setup • QUIET
• OFF timer setup • PRESET
• Hi-POWER • ONE-TOUCH
Description
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
Inverter
• Indoor fan motor
• Louver motor
~
• Compressor
• Outdoor fan motor
• 4-way valve
• Pulse Motor valve
(PMV)
– 33 –
Page 34
FILE NO. SVM-10050
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 “8. Louver control”, respectively.
3) The outdoor unit controls the outdoor fan motor, compressor, pulse motor valve and
4-way valve according to the operation signal sent from the indoor unit.
Operation ON
Indoor unit control
Sending of operation command signal
Outdoor unit control
3. AUTO operation
Selection of operation mode
As shown in the following figure, the operation starts by
selecting automatically the status of room temperature
(Ta) when starting AUTO operation.
*1. When reselecting the operation mode, the fan speed
is controlled by the previous operation mode.
Ta
Cooling operation
Ts + 1
Monitoring (Fan)
Ts – 1
Heating operation
Setup of remote controller
Indoor fan motor control / Louver control / Operation Hz
Control (Requierment)
Compressor revolution control / Outdoor fan motor control /
Operation Hz control (Include limit control)
4-way valve control In cooling operation: ON
Pulse Motor valve control
[ ]
In heating operation: OFF
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.
Description
4. DRY operation
DRY operation is performed according to the difference
between room temperature and the setup temperature
as shown below.
In DRY operation, fan speed is controlled in order to
prevent lowering of the room temperature and to avoid
air flow from blowing directly to persons.
[C]
Ta
+
1.0
+
0.5
L (W5)
(W5+W3) / 2
SL (W3)
Tsc
Fan speed
– 34 –
1) Detects the room temperature (Ta) when
the DRY operation started.
2) Starts operation under conditions in the
left figure according to the temperature
difference between the room temperature and the setup temperature (Tsc).
Setup temperature (Tsc)
= Set temperature on remote controller
(Ts) + (0.0 to 1.0)
3) When the room temperature is lower
1°C or less than the setup temperature,
turn off the compressor.
Page 35
FILE NO. SVM-10050
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
Indication
L
L+
M
M+
H
(Fig. 1)
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
: Super Ultra Low
SUL
* 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
Ts c
speed
Fan
level
WF
WE
WD
WC
WB
WA
W9
W8
W7
W6
W5
W4
W3
W2
W1
d
e
COOL HEAT DRY
UH
H
M+
H
M+ M
ML+
L
L+ L– L+
LL
L– UL L–
UL UL
SUL SUL
SUL
L(W6)
(Linear approximation
from M+ and L)
(Table 1) Indoor fan air flow rate
RAS-18SKV-E
RAS-18SKV2-E
RAS-18SKV-A
RAS-18SKV-ND
Fan speed Air flow rate
(rpm) (m
1100 991
1100 991
1090 980
1070 957
980 858
940 813
890 758
780 636
750 603
740 591
700 547
700 547
650 492
500 325
500 325
3
/h)
RAS-18SKVR-E
RAS-18SKVR-A
Fan speed Air flow rate
(rpm) (m
1100 972
1100 972
1090 962
1070 940
980 843
940 799
890 745
780 626
750 594
740 583
700 540
700 540
650 486
500 324
500 324
3
/h)
RAS-22SKV-E
RAS-22SKV2-E
SKV-A
RAS-22
SKV-ND
RAS-22
Fan speed Air flow rate
(rpm) (m
1200 1101
1200 1101
1200 1101
1180 1079
1080 968
1020 902
980 858
850 713
810 669
800 658
760 614
700 547
650 492
500 325
500 325
3
/h)
RAS-22
SKVR-E
SKVR-A
RAS-22
Fan speed Air flow rate
(rpm) (m
1200 1080
1200 1080
1200 1080
1180 1059
1080 951
1020 886
980 843
850 702
810 659
800 648
760 605
700 540
650 485
500 324
500 324
3
/h)
– 35 –
Page 36
d
O
.
5
)
)
)
.
)
g
y
g
N
1
d
8
FILE NO. SVM-10050
Item
2. Indoor fan
motor control
HEAT O
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
52
5
(Fig. 3)
(L + M) / 2
WA
(M + H) / 2
WE
in air flow rate control
imited to Min WD tap
W8
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 spee
(Fig. 4)
asic fan control
[°C]
TA
TSC
–0.5
d
–1.0
e
–1.5
f
–2.0
g
–2.5
–5.0
.
*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+
(Fig. 5)
TC
(42 + a)) / 10 x (WD
Fan spee
AUT
+ (W9
*1
*2
*3
M+ (WD)
H (WE
*
o limit
W8) + W
Cold draft preventive control
Tc
46 46
45 45 33
33 33 21
32 32 20
*A+4 *A+4 *A+4
*A-4 *A-4 *A-4
*
o limitation while fan speed MANUAL mode is in stability
* A: When Tsc
Tsc: Set value
34
Fan speed
Fan speed AUTO in stabilit
Fan speed AUTO in startin
24, A is 24, and when Tsc < 24, A is Tsc
H (WE
ine-approximate
H and SUL with Tc
SUL (W2
Stop
ANUAL
n startin
(Fig. 6)
[In starting and in stability]
FAN AUTO
FAN Manual
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 lower 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
– 36 –
Page 37
FILE NO. SVM-10050
Item
3. Outdoor fan
motor control
1) Outdoor unit
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
operation command
(Outdoor fan control)
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
YES
NO
4) Motor operates as shown in the table below.
In cooling operation
Compressor speed (rps)
> 38°C
To
> 28°C
To
> 15°C
To
During ECO,
QUIET and
comfort sleep
When To is abnormal
To
> 5.5°C
To
> 0°C
To
> -5°C
To
> 38°C
To
> 28°C
To
To
To
To
To
> 15°C
> 5.5°C
> 0°C
> -5°C
< 22.1 < 50.3 50.3 <
MIN MAX MIN MAX MIN MAX
f 6 f 9 f 8 f B f A f E
f 5 f 9 f 7 f B f 9 f E
f 3 f 7 f 5 f 9 f 7 f B
f 1 f 3 f 1 f 7 f 3 f 9
f 1 f 3 f 1 f 5 f 3 f 7
f 0 f 1 f 0 f 3 f 1 f 4
f 6 f 9 f 8 f B f A f B
f 5 f 9 f 7 f B f 9 f B
f 3 f 7 f 5 f 9 f 7 f B
f 1 f 3 f 1 f 7 f 3 f 9
f 1 f 3 f 1 f 5 f 3 f 7
f 0 f 1 f 0 f 3 f 1 f 4
f 1f Ff 1f Ff 1f F
Outdoor fan speed (rpm)
Tap
f 0
f 1
f 2
f 3
f 4
f 5
f 6
f 7
18SAV-E2
18SAV2-E
18SAV2-A
0 0
230 230
300 300
350 350
410 410
480 480
500 500
530 530
22SAV-E2
22SAV2-E
22SAV2-A
Air conditioner
OFF
Tap
f 8
f 9
f A
f B
f C
f D
f E
f F
18SAV-E2
18SAV2-E
18SAV2-A
Alarm
display
Compressor speed (rps)
To
During To > 5.5°C
ECO mode To > -5°C
When To is abnormal
22SAV-E2
22SAV2-E
22SAV2-A
560 560
640 640
670 670
700 750
800 920
800 920
900 1000
900 1000
In Heating operation
< 30.5 < 55.1 55.1 <
To > 10°C
> 5.5°C
To
To > -5°C
>
To -5°C
To > 10°C
>
To -5°C
f 6f 8f 9
f 8 f A f C
f A f B f D
f A f B f D
f 5f 7f 9
f 7 f 9 f B
f 9 f A f B
f 9 f A f B
f Df Df D
– 37 –
Page 38
FILE NO. SVM-10050
Item
4. Capacity
control
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.
Remote controller Indoor unit
Set temp. (Ts)
Room temp. (Ta)
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
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 opera-
tion are same in cooling
operation and heating operation
5. Current
release control
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 unit inverter main
circuit control current
Operating current ≤ Setup value
Low
Capacity control continues.
Outdoor temp.
45˚C
40˚C
16˚C
11˚C
44˚C
39˚C
15.5˚C
10.5˚C
Change of compressor speed
Outdoor temp. To
Setup of current release point
High
Reduce compressor speed
Current decrease
Cooling current release value
18SAV-E2
18SAV2-E
18SAV2-A
6.07A 7.05A
7.12A 9.30A
8.47A 10.50A
22SAV-E2
22SAV2-E
22SAV2-A
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.
Heating current release value
18SAV-E2
18SAV2-E
18SAV2-A
8.77A 10.88A
22SAV-E2
22SAV2-E
22SAV2-A
– 38 –
Page 39
FILE NO. SVM-10050
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
exchanger detects condensation temperature and
controls the compressor speed so that temperature of
the heat exchanger does not exceed the specified value.
Reduction of compressor speed
P
When the value is
Q
in Q zone, the
compressor speed
is kept.
R
Usual heating capacity control
1) When temperature of the indoor
heat exchanger rises in the range
from 50°C to 55°C, the compressor speed is kept.
(Q zone)
When temperature of the indoor
heat exchanger drops in the
range from 46°C to under 55°C,
the compressor speed is kept.
(Q zone)
2) When temperature of the indoor
heat exchanger rises to 55°C or
higher, the compressor speed is
reduced. (P zone)
3) When temperature of the indoor
heat exchanger does not rise to
50°C, or when it drops below to
46°C, the capacity control
operation returns to the usual
control in heating operation.
(R zone)
– 39 –
Page 40
FILE NO. SVM-10050
Item
7. Defrost control
(Only in heating
operation)
Operation flow and applicable data, etc.
(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.
Start of heating operation
0’ 10’ 15’ 29’ 35’
Operation time
(Minute)
–3˚C
C zone
–7˚C
A zone
–26˚C
B zone
Te0 detection time
Outdoor heat exchanger temperature
* The minimum value of Te sensor 10 to 15 minutes after start of
operation is stored in memory as Te0.
*
Table 1
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)
<Defrost operation>
• Defrost operation in A to C zones
1) Stop operation of the compressor for
20 seconds.
2) Invert (ON) 4-way valve 10 seconds
after stop of the compressor.
3) The outdoor fan stops at the same
time when the compressor stops.
4) When temperature of the indoor heat
exchanger becomes 38°C or lower,
stop the indoor fan.
<Finish of defrost operation>
• Returning conditions from defrost
operation to heating operation
1) Temperature of outdoor heat ex-
changer rises to +8°C or higher.
2) Temperature of outdoor heat ex-
changer is kept at +5°C or higher for
80 seconds.
3) Defrost operation continues for
15 minutes.
A zone
B zone
C zone
When Te0 - TE ≥ 2.5 continued for 2 minutes in A zone,
defrost operation starts.
When the operation continued for 2 minutes in B zone,
defrost operation starts.
When Te0 - TE ≥ 3 continued for 2 minutes in C zone,
defrost operation starts.
<Returning from defrost operation>
1) Stop operation of the compressor for
approx. 50 seconds.
2) Invert (OFF) 4-way valve approx. 40
seconds after stop of the compressor.
3) The outdoor fan starts rotating at the
same time when the compressor starts.
– 40 –
Page 41
FILE NO. SVM-10050
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 horizontal angle is 0°.
1) Louver position in cooling operation
Cooling operation/
AUTO (COOL)
Initial setting of “Cooling storage position”
Louver : Horizontal blowing (37.4°)
2) Louver position in heating operation
Heating operation/
AUTO (HEAT)
Description
2) Air direction adjustment
Horizontal
blowing
3) Swing
Inclined
blowing
• Swing operation is performed in width 35° with the stop position as
the center.
• If the stop position exceeds either upper or lower limit position, swing
operation is performed in width 35° from the limit which the stop
position exceeded.
Initial setting of “Heating storage position”
Louver : Directs downward (76.9°)
Air direction
Blowing
downward
Inclined
blowing
• The louver position can
be arbitrarily set up by
pushing [FIX] button.
Horizontal
blowing
• Swing
When pushing [SWING]
button during operation,
the louver starts
swinging.
– 41 –
Page 42
FILE NO. SVM-10050
Item
9. ECO operation
TA
+6.5
+6.0
+5.5
+5.0
+4.5
+4.0
+3.5
+3.0
+2.5
+2.0
+1.5
+1.0
+0.5
TSC
–0.5
–1.0
–2.0
Operation flow and applicable data, etc.
When pushing [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
1H 2H 3H 4H Time
Zone
12
11
10
9
8
7
6
5
4
3
2
1
Dry Max
∗12
∗11
∗10
Min
OFF
FAN
∗9
∗8
Hz
can change every speed.
Fan speed depend on presetting and
* 12 (DRY max - COOL min) /6 × 5 + COOL min
* 11 (DRY max - COOL min) /6 × 4 + COOL min
* 10 (DRY max - COOL min) /6 × 3 + COOL min
* 9 (DRY max - COOL min) /6 × 2 + COOL min
* 8 (DRY max - COOL min) /6 × 1 + COOL min
Hz
Cool min
DRY max
18SKV-E,18SKVR-E
18SKV2-E,18SKV-A
18SKVR-A,18SKV-ND
10
49
22SKV-E,22SKVR-E
22SKV2-E,22SKV-A
22SKVR-A,22SKV-ND
10
50
Description
<Cooling operation>
1) The control target temperature
increases 0.5°C per hour up to
2°C starting from the set temperature when ECONO has been
received.
2) The indoor fan speed depends
on presetting and can change
every speed after setting ECO
operation.
3) The compressor speed is
controlled as shown in the left
figure.
<Heating operation>
0
–0.5
A
–1.0
–1.5
B
–2.0
–2.5
–3.0
–4.0
–5.0
–5.5
C
(Room temp. – Set temp.)
–11.0
–11.5
Hz
a
c
30 minutes → Time
A
B
C
18SKV-E,18SKVR-E
18SKV2-E,18SKV-A
18SKVR-A,18SKV-ND
22SKV-E,22SKVR-E
22SKV2-E,22SKV-A
22SKVR-A,22SKV-ND
10
68
Compressor
speed
0Hz
A zone
aHz
B zone
a to cHz
C zone
cHz
10
72
<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 depends
on presetting and can change
every speed after setting ECO
operation.
– 42 –
Page 43
FILE NO. SVM-10050
Item
10. Temporary
operation
Operation flow and applicable data, etc.
Pushing [RESET] button starts the temporary
operation of [AUTO] operation. When keeping
[RESET] button pushed for 10 seconds or more, the
temporary [COOL] operation is performed.
Filter lamp ON
NO
Did you push [RESET] button
for 3 seconds or more?
YES
Did you push [RESET] button
for 10 seconds or more?
NO
Switch to [AUTO RESTART] control.
11. Air purifying
control
RAS-18SKVR-E,
RAS-18SKVR-A,
RAS-22SKVR-E,
RAS-22SKVR-A
This function generates nagative ion while cleaning the air in the room.
If air purifier-ON signal is received while the air conditioner stops, the air purifier starts operation,
and if it is received while the air conditioner operates, the air conditioner and the air purifier start
operation.
The air ion generator operates linked with the air purifying operation.
only
Present status
Stop
Air purifier only
Air conditioner
Joint use of AC and air purifier
Air purifying operation
AC + Air purifying operation
YES
NO
YES
PURE button Air conditioner
Air purifier AC operation*
Stop (All) AC + Air purifier
AC + Air purifier All stop
AC operation All stop
Louver*1
Cooling position
Follows to AC operation
Push RESET button.
Temporary [AUTO] operation
Temporary [COOL] Operation
Operation button
AUTO, L, L+, M, M+, H
Follows to AC operation
Fan speed *2
Description
1) When pushing [RESET] button, the
temporary [AUTO] operation starts.
2) When keeping [RESET] button pushed for
3 seconds or more, Pi, Pi, Pi sound is
heard and [AUTO RESTART] control is
changed.
3) When keeping [RESET] button pushed for
10 seconds or more, “Pi” sound is heard
and the temporary [COOL] operation
starts.
4) If the filter lamp goes on, push [RESET]
button to go off the filter lamp, and then
push [RESET] button again.
5) To stop the temporary operation, push the
button again.
* When the previous operation was the
operation of air conditioner + air purifier,
an operation of air conditioner + air purifier
starts by pushing AC button on the remote
controller.
(Operation of air conditioner + air purifier is
stored in memory.)
*1 Swing is available
*2 Fan speed is Fan Auto mode varies in
order, (M + 1) → (L) → (L–) → (SL).
Sending air purifier-ON
1
Operation lamp ON
Memory position
of louver/COOL
Fan ON
Air purifier ON
Air purifying operation
*1
*2
1
2
,
Air conditioner operatesAir conditioner stops
Start of air purifier-ON
Air conditioner +
air purifier operate
Sending air purifier-OFF
2
3
3
4
,
4
Air purifier operates Air conditioner +
Air purifier operate
Operation lamp OFF Filter-OFF
Fan stop
Air conditioner operates
Air purifier-OFF
Louver close
All stop
– 43 –
Page 44
FILE NO. SVM-10050
Item
11. Air purifying control [Detection of abnormality]
YES
Filter lamp (1Hz) ON
Air purifier power OFF
1 2
Operation flow and applicable data, etc.
Air purifying operation
PURE lamp ON
Air purifier power ON
Air purifier
power estimates
1000H
NO
Error input is detected
YES
Air purifier power OFF
Error input
was detected by
5 times or more
YES
Filter lamp (1Hz) ON
Reset by RESET button.
Q
Reset by RESET button or by the stop direction
R
from the remote controller.
* When the breaker is turned [ON] or RESET
button is pushed while the FILTER indicator is
turned on, the air purifier is not turned on until
the integrated operation time of the indoor fan
exceeds 1 hour after operation start.
It is the safety measures considering an
incomplete drain when electric dust collector has
been cleaned with water.
∗
NO
NO
Approx. 10 minutes
passed from the error input
was detected.
YES
NO
Description
1. Purpose
The air purifying control function is to
alert the user to trouble in the ionizing or
air purifying operation.
2. Description
Trouble is determined to have occurred
(indicated by the FILTER indicator) in the
following 4 cases.
1) When a count of 1000H has been
reached on the timer
2) When the panel switch has been set to
OFF by the opening of the air inlet
grille, etc.
3) When an abnormal discharge caused
by a symptom such as the build-up of
dirt has been detected while the air
purifier is ON.
4) When the electric dust collector has
not been installed correctly
∗ Trouble case 2) or 3) is deemed to
have occurred when the action
concerned continues for more than
one second.
3. Operation
The sequence that FILTER indicator is
turned on are described in the left
flowchart.
1) When 1000H timer counts up, the
FILTER indicator keeps lighting even if
the operation is stopped by the remote
controller.
The timer is stored in memory of the
microcomputer, and the operation time
is cleared by filter RESET button on
the indoor unit.
(FILTER indicator goes off.)
2) If the air purifying error input was
detected by 5 times or under, turn on
the purifier again approx. 10 minutes
after and judge it again.
If the air purifying error input was
detected by 5 times or more,
determine the error and turn on the
Filter lamp.
– 44 –
Page 45
FILE NO. SVM-10050
Item
12. Pulse motor
valve (PMV)
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 motor.
Starting up
Initialize
Move to
initial position
Compressor ON
Td
release control
Description
1) When starting the operation, move the valve
once until it fits to the stopper. (Initialize)
* In this time, “Click” sound may be heard.
2) Adjust the open degree of valve by super heat
amount. (SH control)
3) If the discharge temperature was excessively
up, adjust the open degree of valve so that it
is in the range of set temperature.
(Discharge temp. control)
4) When defrost operation is performed, the
open degree of valve is adjusted according to
each setup conditions during preparation for
defrost or 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
Power OFF
∗ SH (Super Heat amount) =
Ts (Temperature of suction pipe of the compressor) –
Tc or Te (Heat exchanger temperature at evaporation side)
∗ PMV: Pulse Motor Valve
Room temp. sensor
(Ta sensor) control
Defrost
– 45 –
Page 46
FILE NO. SVM-10050
Item
13. Self-Cleaning
function
Only timer indicator lights, and Self-Cleaning operation starts
Operation flow and applicable data, etc.
Unit now performing cooling or dry operation
Push “STOP” button
Time set now elapses
Operation stops
• During Self-Cleaning operations:
The louver opens slightly. The indoor fan operates continuously at a speed of 500 rpm.
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
Self- Cleaning 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.
Self-Cleaning operation times
Operation time Self-Cleaning operation time
Cooling: Auto (cooling) Dry
Heating: Auto (heating)
Auto (fan only)
Shutdown
• To stop an ongoing Self-Cleaning operation at any time
Push the start/stop button on the remote controller twice during the Self-Cleaning operation.
(After pushing the button for the first time, push it for the second time without delay
(within 10 minutes).)
Up to 10 minutes
10 minutes or longer 30 minutes
No Self-Cleaning operation performed
No Self-Cleaning operation
performed (0 minutes)
– 46 –
Page 47
FILE NO. SVM-10050
Item
13. Self-Cleaning
function
Operation display
FCU fan
FCU louver
Timer display
Compressor
CDU fan
14. Remote
Controller-A or
B selection
Operation flow and applicable data, etc.
• Self-Cleaning diagram
ON
rpm is depend on presetting.
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.
ON
OPEN
ON or OFF
ON or OFF
ON or OFF
Turn off by
remote controller or
timer-off function.
OFF
ON
(450RPM)
OPEN (12.7°)
ON
OFF
OFF
Self-Cleaning
mode operate
30 mins.
Automatically
Setting the remote controller
To separate using of remote controller for each indoor
unit in case of 2 air conditioner are installed nearly.
Remote Controller B Setup.
1) Push RESET button on the indoor unit to turn the air
conditioner ON.
2) Point the remote controller at the indoor unit.
3) Push and hold CHK button on the Remote Controller
by the tip of the pencil.
“00” will be shown on the display.
4) Push MODE during pushing CHK.
“B” will show on the display and “00” will disappear
and the air conditioner will turn OFF.
The Remote Controller B is memorized.
Note :
1. Repeat above step to reset Remote Controller to be A.
2. Remote Controller A has not “A” display.
3. Default setting of Remote Controller from factory is A.
Description
OFF
OFF
CLOSE
ON or OFF
depend on presetting of timer function.
OFF
OFF
Operation time
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 controller also set to B.
(At the factory the remote controller
selection is set to A on all the
indoor units.
There is no A setting display.)
“B” Display
“00” Display
AUTO
– 47 –
Page 48
FILE NO. SVM-10050
Item
15. QUIET mode
16. COMFORT
SLEEP
Operation flow and applicable data, etc.
When the [QUIET] button is pushed, the fan of
the indoor unit will be restricted the revolving
speed at speed L - until the [QUIET] button is
pushed once again (cancel Quiet mode).
Cooling mode
• The preset temperature will increase as
shown on ECO operation (Item No. 9)
• Push the [COMFORT SLEEP] button to
choose the operating hours.
Repeat pushing to select the hours.
(1hr, 3hr, 5hr or 9hr)
• If the [COMFORT SLEEP] button is pushed
again means cancel comfort sleep mode.
Heating mode
• The preset temperature will drop down as
shown on ECO operation (Item No. 9)
• Push the [COMFORT SLEEP] button to
choose the operating hours.
Repeat pushing to setect the hours.
(1hr, 3hr, 5hr or 9hr)
• If the [COMFORT SLEEP] button is pushed
again means cancel comfort sleep mode.
Description
Quiet mode is the system which, control the
revolving speed of indoor fan to work constantly
at lower than speed L. In addition, noise level of
indoor unit is less than usual.
Remarks :
1. Quiet mode is unable to work in dry mode.
2. Quiet mode is appropriate to work with less
cooling load and less heating load condition.
Because of the fan speed L- may cause not
enough the cooling capacity or heating
capacity.
The principles of comfort sleep mode are:
• Quietness for more comfortable. When room
temperature reach setting temperature
• Save energy by changing room temperature
automatically.
• The air condition can shut down by itself
automatically.
Remarks:
1. Comfort sleep mode will not operate in dry
mode and fan only mode.
17. Shor t Timer In the normal condition, after switching one
circuit breaker, 3-minute delay time for
compressor and 1 hour for plasma air purifier
are set for the maintenance of the unit.
PRESET
ONE-TOUCH
QUIET
SWING
TIMER
SLEEP
CHK
FIX Hi-POWER ECO
ON
TEMP
PURE
FILTER
OFF
MODE
COMFORT
CLOCK
FAN
SLEEP
CLR
SET
Purpose
To start the unit immediately for the purpose of
testing, trial...etc, short timer can be used.
maintenance of the unit.
Short Timer Setting
Push [ ] button to turn the unit OFF.
Q
Set the operation mode or plasma air purifier
R
on the remote controller without sending the
signal to the unit.
Use the tip of the pencil to push the [CHK]
S
button and hold, “00” will show on display,
then push [SET] button to make “00” disappear.
Push [ ] button to turn the unit ON.
T
When short timer is activated, all setting on
U
4
the remote controller operates immediately,
besides, all indicatiors on front panel turn ON
continuously for 3 seconds.
3
– 48 –
Page 49
FILE NO. SVM-10050
Item
18. One Touch
Comfort
19. Hi POWER Mode
Operation flow and applicable data, etc.
One touch comfort is the fully automated operation that
is set according to the preferable condition in a region.
Fan
Operation
AUTO
0
*AUTO/L L
12 25
Time after operation
starts (min)
∗ AUTO/L: Fan operates depends on the setting
temperature and room temperature.
During the One Touch Comfort mode if the indoor unit
receives any signal with other operation mode, the
unit will cancel the comfort mode and operates
according to the signal received.
([Hi-POWER] button on the remote controller is
pushed)
When [Hi-POWER] button is pushed while the indoor
unit is in Auto, Cooling or Heating operation, Hi
POWER mark is indicated on the display of the remote
controller and the unit operates as follows.
1. Automatic operation
• The indoor unit operates in according to the
current operation.
2. Cooling operation
• The preset temperature drops 1 degree
(The value of the preset temperature on the
remote controller does not change.)
The indoor unit’s fan speed level increases 1 tap.
3. Heating operation
• The preset temperature increases 2 degree
(The value of the preset temperature on the
remote controller does not change.)
The indoor unit’s fan speed level increases 1 tap
4. The Hi POWER mode can not be set in Dry
operation
Description
Operation condition for model to
Europe market
When an indoor unit receives “One
Touch Comfort Signal” from the
remote controller, the indoor unit
operates as following.
1) Air conditioner starts to operation
when the signal is received, even if
the air conditioner was OFF.
2) Operation mode is set according to
room temperature, the same as
AUTO mode.
3) Target temperature is 24°C.
4) Louver position is set as stored
position of the operating mode.
5) Fan is controlled as followings.
20. FILTER Indicator
RAS-18SKVR-E,
RAS-18SKVR-A,
RAS-22SKVR-E,
RAS-22SKVR-A
only
When the elapsed time reaches 1000 hours after air
purifier operation, the FILTER indicator lights.
After cleaning the filters, turn off the FILTER indicator.
How to Turn Off FILTER Indicator
Push [RESET] button on the indoor unit.
NOTE :
If [RESET] button is pushed while the FILTER indicator
is not lit, the indoor unit will start the automatic
operation.
When you want a temporary operation while the
FILTER lamp lights, push [RESET] button to turn off
the FILTER lamp. (See page 39)
– 49 –
Page 50
FILE NO. SVM-10050
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 event of a power supply being accidentally shut down.
The operation will resume without warning 3 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.
Push the [RESET] button located in the center of the front panel continuously for 3 seconds.
The unit receives the signal and beeps 3 times.
The unit then restarts operating automatically in the event of power supply being accidentally shut down.
• When the unit is stand-by (Not operating)
Operation
Push [RESET] button for more than
3 seconds. (Less than 10 seconds)
Hi POWER FILTER PAP TIMER OPERATION
RESET
• When the unit is in operation
Operation
Push [RESET] button for more than
3 seconds. (Less than 10 seconds)
Motions
The unit is on standby.
↓
The unit starts to operate. The green indicator is on.
↓ After approx. 3 seconds,
The unit beeps 3 times The green indicator flashes
and continues to operate. for 5 seconds.
If the unit is not required to operate at this time, push [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. 3 seconds,
The unit beeps 3 times. The green indicator flashes
for 5 seconds.
Hi POWER FILTER PAP TIMER OPERATION
If the unit is required to operate at this time, push [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 button.
– 50 –
Page 51
FILE NO. SVM-10050
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 3 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
Push [RESET] button for more than
3 seconds. (Less than 10 seconds)
Hi POWER FILTER PAP TIMER OPERATION
RESET
• When the system is operating
Operation
Push [RESET] button for more than
3 seconds. (Less than 10 seconds)
Motions
The unit is on standby.
↓
The unit starts to operate. The green indicator is on.
↓ After approx. 3 seconds,
The unit beeps 3 times and continues to operate.
If the unit is not required to operate at this time, push [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. 3 seconds,
The unit beeps 3 times.
Hi POWER FILTER PAP TIMER OPERATION
If the unit is required to operate at this time, push [RESET] button
once more or use the remote controller to turn it on.
RESET
9-3-3. Power Failure during Timer Operation
When the unit is turned off because of power failure during timer operation, the timer operation is cancelled.
In that case, set the timer operation again.
NOTE :
The Everyday Timer is reset while a command signal can be received from the remote controller even if it
stopped due to a power failure.
– 51 –
Page 52
9-4. Remote Controller
9-4-1. Remote Controller and Its Functions
1
Infrared signal emitter
2
Start/Stop button
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
On timer button (ON)
9
Off timer button (OFF)
10
Sleep timer button (SLEEP)
11
Setup button (SET)
12
Clear button (CLR)
13
Memory and Preset button (PRESET)
20
Filter reset button (FILTER)
21
Clock Reset button (CLOCK)
22
Check button (CHK)
FILE NO. SVM-10050
14
One Touch button (ONE-TOUCH)
15
High power button (Hi-POWER)
16
Economy button (ECO)
17
Quiet button (QUIET)
18
Comfort sleep button (COMFORT SLEEP)
19
Plasma Air Purifier button (PURE)
(RAS-18SKVR-E, RAS-18SKVR-A,
RAS-22SKVR-E, RAS-22SKVR-A only)
9-4-2. Operation of Remote Controller
1. ONE-TOUCH
Push the “ONE-TOUCH” button for fully automated operation that is customised to the typical consumer
preferences in your region of the world. The coutomised settings control temperature air flow strength, air
flow direction and other settings to provide you alternate contact with “ONE-TOUCH” OF THE BUTTON.
If you prefer other settings you can select from the many other operation functions of your TOSHIBA unit
Push ONE-TOUCH : Start the operaton.
2. AUTOMATIC OPERATION
To automatically select cooling, heating, or fan only operation.
1. Push MODE : Select A.
2. Push
3. COOLING / HEATING / FAN ONLY OPERATION
To automatically select cooling, heating, or fan only operation.
1. Push MODE : Select Cool , Heat , or Fan only .
2. Push
3. Push FAN : Select AUTO, LOW ,
TEMP
MODE : Select A.
TEMP
MODE : Set the desired temperature. Cooling: Min. 17°C, Heating : Max. 30°C,
Fan Only: No temperature indication
LOW+ , MED , MED+ , or HIGH .
– 52 –
Page 53
FILE NO. SVM-10050
4. DRY OPERATION (COOLING ONLY)
For dehumidification, a moderate cooling performance is controlled automatically.
1. Push MODE : Select Dry .
2. Push
5. AIR PURIFYING OPERATION (RAS-18KVR-E, RAS-18SKVR-A, RAS-22SKVR-E, RAS-22SKVR-A only)
During air conditioner operation
The plasma air purifier and air ionizer can be activated or deactivated during air conditioner is stopped and
the air ionizer starts in conjunction with plasma air purifier operation.
Note:
The FILTER indicator (orange) turns on after PURE operation is performed for about 1000 hours.
6. Hi POWER OPERATION
To automatically control room temperature and airflow for faster cooling or heating operation
(except in DRY and FAN ONLY mode)
7. ECO OPERATION
To automatically control room to save energy (except in DRY and FAN ONLY mode)
TEMP
MODE : Set the desired temperature.
Push PURE to start and air ionizer operation.
Push Hi-POWER : Start and stop the operation.
Push ECO : 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.
8. TEMPORARY OPERATION
In case of the misplaced or discharged remote controller
• Pushing the RESET button, the unit can start or stop
without using the remote controller.
• Operation mode is set on AUTOMATIC operation, preset
temperature is 24°C and fan operation is automatic speed.
9. TIMER OPERATION
Setting the ON Timer
Push
Push
Push
ON
: Set the desired ON timer.
SET
: Set the timer.
CLR
: Cancel the timer.
Push
Push
Push
1
2
3
Setting the OFF Timer
OFF
: Set the desired OFF timer.
SET
: Set the timer.
CLR
.
Daily timer allows the user to set both the ON and OFF timers and will be activated on a daily basis.
Setting Daily Timer
1
2
Push
: Set the ON timer.
OFF
: Set the OFF timer.
3
4
ON
Push
SET
Push
Push
(
.
SET
button during the
or ) mark flashing.
• During the daily timer is activation, both arrows ( or ) are indicated.
– 53 –
Page 54
FILE NO. SVM-10050
Note:
• Keep the remote controller in accessible transmission to the indoor unit;
otherwise, the time lag of up to 15 minutes will occur.
• The setting will be saved for the next same operation.
10. PRESET OPERATION
Set your preferred operation for future use.
The setting will be memorized by the unit for future operation (except air flow direction).
1. Select your preferred operation.
2. Push and hold PRESET for 3 seconds to memorize the setting. The mark displays.
3. Push PRESET : Operate the preset operation.
11. AUTO RESTART OPERATION
To automatically restart the conditioner after the power failure (Power of the unit must be on.)
Setting
1. Push and hold the RESET button on the indoor unit for 3 seconds to set the operation.
(3 beep sound and OPERATION lamp flashes 5 time/sec for 5 seconds)
• Do not operate ON timer and OFF timer.
2. Push and hold the RESET button on the indoor unit for 3 seconds to cancel the operation.
(3 beep sound but OPERATION lamp does not flash)
12. QUIET OPERATION
To operate at super low fan speed for quiet operation (except in DRY mode)
Push QUIET : Start and stop the operation.
Note:
Under certain conditions, QUIET operation may not provide adequate cooling or heating due to low sound
features.
13. COMFORT SLEEP OPERATION
To save energy while sleeping, automatically control air flow and automatically turn OFF.
Push COMFORT SLEEP : Select 1, 3, 5 or 9 hrs for OFF timer operation.
Note:
The 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.
14. SLEEP TIMER OPERATION
To start the sleep timer (OFF timer) operation
Push SLEEP : Select 1, 3, 5 or 9 hrs for OFF timer operation.
– 54 –
Page 55
8
5
FILE NO. SVM-10050
9-4-3. Names and Functions of Indications on Remote Controller
[Display]
All indications, except for the clock time indicator, are displayed by pushing the button.
1
Transmission mark
This transmission mark indicates when the remote
controller transmits signals to the indoor unit.
2
Mode indicator
Indicates the current operation mode.
(AUTO : Automatic control, A : Auto changeover
control, : Cool, : Dry, : Heat)
3
Temperature indicator
Indicates the temperature setting.
(17°C to 30°C)
4
PURE indicator
Shows that the electrical air purifying operation is in
progress.
5
FAN speed indicator
Indicates the selected fan speed.
AUTO or five fan speed levels
(LOW
HIGH
Indicates AUTO when the operating mode is either
AUTO or
6
TIMER and clock time indicator
The time setting for timer operation or the clock time
is indicated.
The current time is always indicated except during
TIMER operation.
7
Hi POWER indicator
Indicates when the Hi POWER operation starts.
Push the Hi-POWER button to start and push it
again to stop the operation.
, LOW+ , MED , MED+ ,
) can be shown.
: Dry.
8
9
10
11
12
13
14
(PRESET) indicator
Flashes for 3 seconds when the PRESET button is
pushed during operation.
The
button for more than 3 seconds while the mark is
flashing.
Push another button to turn off the mark.
ECO indicator
Indicates when the ECO is in activated.
Push the ECO button to start and push it again to
stop operation.
mark is shown when holding down the
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.)
Comfort sleep
Indicates when comfort sleep is activaled.
Push comfort sleep button to select.
Quiet
Indicates when quiet is activated.
Push quiet button to start and push it again to stop
operation.
One-Touch
Indicates when one touch comfort is activated.
Push one-touch button to start the operation.
Swing
Indicates when louver is swing.
Push swing button to star t the swing operation and
push it again to stop the swing operation.
1
12
7
10
11
4
3
13
– 55 –
2
14
6
9
Page 56
10. INSTALLATION PROCEDURE
ear
t
e
600 mm or more
ook
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m
g
.
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t
.
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.
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.
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ead
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10-1. Installation Diagram of Indoor and Outdoor Units
FILE NO. SVM-10050
Pure Air Purifi
SKVR only
Batterie
5 Filter
(Attach to the f
Pure Air Purifier
Air filter
ront panel.)
mm or more
H
2 Wireless remote controller
nst
at
Shield pi
For the rear left and left piping
Wall
Insert the
unit and wall, and tilt the indoor unit for
better operation
Do not allow the drain hose to get slack
Make sure to run the drain ho
sloped downward
The auxiliary piping can be connected
to the left, rear left, rear right, right,
bottom right or bottom left
hion between the indoor
ut the
piping hole
sloped slightly
Vinyl tape
Apply after carryin
out a drainage test
or more
600 mm
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
n h
wood scr
4 Remote controller
holder
addl
Ext
ion drain ho
(Not available, provided by installer
A
C
L
3 Batteries
Righ
Rear righ
Bottom righ
Insulate the refrigerant pipes separately
with insulation, not to
8 mm thick heat resistin
polyethylene foa
R
lef
ether
Lef
Bottom lef
– 56 –
Page 57
10-2. Optional Parts, Accessories and Tools
10-2-1. Optional Installation Parts
FILE NO. SVM-10050
Part Code
Parts name
Refrigerant piping
Indoor unit name Liquid side (Outer diameter) Gas side (Outer diameter)
RAS-18SKVR-E, 18SKV-E
RAS-22SKVR-E, 22SKV-E
Y
Z
RAS-18SKV2-E, 18SKV2-E
RAS-22SKV-ND, 22SKV-ND
RAS-18SKVR-A
RAS-22SKVR-A
, 18SKV-A
, 22SKV-A
Shield pipe (for extension drain hose) (polyethylene foam, 6 mm thick)
6.35 mm 12.7 mm
Attachment bolt arrangement of outdoor unit
• Secure the outdoor unit with the attachment bolts and
nuts if the unit is likely to be exposed to a strong wind.
• Use Ø8 mm or Ø10 mm anchor bolts and nuts.
If it is necessary to drain the defrost water, attach
drain nipple to the base plate of the outdoor unit
before installing it.
108 mm
28 mm Air inlet
Dia.
25mm
86
mm
320 mm
Air outlet
600 mm
125 mm
Drain outlet
one each
mm
102
90
mm
Q’ty
1
10-2-2. Accessory and Installation Parts
Part No.
1
2
3
Part name (Q’ty)
Installation plate × 1
ONE-TOUCH
QUIET
SWING
TIMER
SLEEP
CHK
ON
FILTER
OFF
CLOCK
CLR
SET
PRESET
FIX Hi-POWER ECO
PURE
TEMP
COMFORT
MODE
FAN
SLEEP
Wireless remote controller × 1
Battery × 2
Part No.
5
6
7
Part name (Q’ty)
TOSHIBA New AIQ filter × 2
(P/N : RB-A620DE)
TOSHIBA New AIQ filter × 2
(P/N : RB-A620DE)
Plasma pure filter × 1
(SKVR series)
Mounting screw Ø4 × 25 l × 6
Part No.
9
10
11
Part name (Q’ty)
Drain nipple∗ × 1
Water-proof rubber cap × 2
Screw Ø4 × 10 l × 2
<Others>
Name
Owner's manual
Installation manual
Product specification
Accessory sheet
4
8
Remote controller
Remote controller holder × 1
holder mounting screw
Ø3.1 × 16 l × 2
Parts marked with asterisk (*) are
packaged with the outdoor unit.
– 57 –
Page 58
FILE NO. SVM-10050
10-2-3. Installation/Servicing Tools
Changes in the product and components
In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3-way valve) has been changed.
(1/2 UNF 20 threads per inch)
• In order to increase the pressure resisting strength of the refrigerant piping flare processing diameter and size of
opposite side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)
New tools for R410A
New tools for R410A
Gauge manifold
Charge hose
Electronic balance
for refrigerant charging
Torque wrench
(nominal diam. 1/2, 5/8)
Flare tool (clutch type)
Gauge for projection
adjustment
Vacuum pump adapter
Applicable to R22 model
×
×
¡
×
¡
——
¡
Changes
As pressure is high, it is impossible to measure by means of
conventional gauge. In order to prevent any other refrigerant from
being charged, each port diameter has been changed.
In order to increase pressure resisting strength, hose materials and
port size have been changed (to 1/2 UNF 20 threads per inch).
When purchasing a charge hose, be sure to confirm the port size.
As pressure is high and gasification speed is fast, it is difficult to
read the indicated value by means of charging cylinder, as air
bubbles occur.
The size of opposite sides of flare nuts have been increased.
Incidentally, a common wrench is used for nominal diameters 1/4
and 3/8.
By increasing the clamp bar’s receiving hole, strength of spring in
the tool has been improved.
Used when flare is made by using conventional flare tool.
Connected to conventional vacuum pump. It is necessary to use
an adapter to prevent vacuum pump oil from flowing back to the
charge hose. The charge hose connecting part has two ports-one
for conventional refrigerant (7/16 UNF 20 threads per inch) and
one for R410A. If the vacuum pump oil (mineral) mixes with R410A
a sludge may occur and damage the equipment.
Gas leakage detector
• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the
U. S’s ARI specified rose color (ARI color code: PMS 507).
• Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to
the charge hose’s port size.
×
Exclusive for HFC refrigerant.
– 58 –
Page 59
FILE NO. SVM-10050
10-3. Indoor Unit
10-3-1. Installation Place
• A place which provides enough spaces around
the indoor unit as shown in the diagram.
• A place where there are no obstacle near the air
inlet and outlet.
• A place which allows easy installation of the
piping to the outdoor unit.
• A place which allows the front panel to be
opened.
• The indoor unit shall be installed so that the top of
the indoor unit is positioned at least 2 m in height.
• Also, avoid putting anything on the top of the
indoor unit.
CAUTION
• Direct sunlight on the indoor unit wireless
receiver should be avoided.
• The microprocessor in the indoor unit should
not be too close to r-f sources.
(For details, see the owner’s manual.)
10-3-2. Drilling a Hole and Mounting
Installation Plate
Drilling a hole
When install the refrigerant pipes from the rear.
e center of pipe hole
m from the right side edge is
23mm
35 120 180 240
Pipe hole
Dia .65mm
The center of the pipe hole is the above arrow.
Fig. 10-3-2
1. After determining the pipe hole position on the
installation plate (ð) drill the pipe hole (Ø65 mm)
at a slight downward slant to the outdoor side.
Remote controller
• Should be placed where there are no obstacles,
such as curtains, that may block the signal.
• Do not install the remote controller in a place
exposed to direct sunlight or close to a heating
source, such as a stove.
• Keep the remote controller at least 1 m away from
the nearest TV set or stereo equipment.
(This is necessary to prevent image disturbances
or noise interference.)
• The location of the remote controller should be
determined as shown below.
(Side view) (Top view)
Indoor unit
45˚
Indoor unit
75˚
Reception
range
Reception
range
45˚
Remote controllerRemote controller
NOTE :
• When drilling into a wall that contains a metal lath,
wire lath or metal plate, be sure to use a pipe hole
brim ring sold separately.
Mounting the installation plate
Pipe hole
0
7
1
5
8
Indoor unit
the center of pipe hole
Offset 85mm from the left side edge is
o
T
n
u
2
l
t
u
o
t
i
m
m
0
4
Hook
e
n
i
Anchor bolt holes
Hook
e
n
i
l
t
u
o
nit
u
o
T
m
5m
3
e
n
i
l
t
u
o
nit
u
o
T
m
m
20
1
Thread
Fig. 10-3-3
3
2
0
Weight
0
2
1
5
3
Mounting
7
Screw
8
1
0
Hook
2
50
o
T
0
4
40
Offset 23mm from the right side edge is
0
7
1
e
n
i
l
t
u
o
t
i
n
u
m
m
0
4
2
the center of pipe hole
2
3
1
3
2
m
m
5
6
.
a
i
d
2 m or more from floor
Pipe hole (dia. 65mm)
Installation
1
plate
Fig. 10-3-1
– 59 –
Page 60
FILE NO. SVM-10050
When the installation plate is directly
mounted on the wall
1. Securely fit the installation plate onto the wall by
screws with the upper and lower catches, that
hold the indoor unit, facing out.
2. To mount the installation plate on a concrete wall
use anchor bolts.
Drill the anchor bolt holes previous page.
3. Install the installation plate horizontally and level.
CAUTION
When installing the installation plate with mounting
screw, do not use the anchor bolt hole.
Otherwise the unit may fall down and result in
personal injury and property damage.
Anchor bolt
Projection
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 a power source for the exclusive use of
the air conditioner.
NOTE :
• Wire type :
More than 1.5 mm² H07RN-F or 60245IEC66.
CAUTION
This appliance can be connected to a main
circuit breaker in either of the following two
ways.
1. Connection to fixed wiring:
A switch or circuit breaker which disconnects
all poles and has a contact separation of at
least 3 mm must be incorporated in the fixed
wiring. An approved circuit breaker or switch
must be used.
2. Connection with power supply plug:
Attach power supply plug with power cord
and plug it into wall outlet. An approved
power supply cord and plug must be used.
Fig. 10-3-4
5 mm dia. hole
7 Mounting screw
Ø4 × 25
Clip anchor
(local parts)
Fig. 10-3-5
l
CAUTION
Failure to securely install the unit may result in
personal injury and/or property damage if the
unit falls.
• In case of block, brick, concrete or similar type
walls, drill 5 mm dia. holes in the wall.
• Insert clip anchors for the mounting screws.
NOTE :
• Install the installation plate using mounting screws
between 4 to 6, being sure to secure all 4 corners.
NOTE :
• Perform wiring work being sure the wire length is
long enough.
10-3-4. Wiring Connection
How to connect the connecting cable
Wiring the connecting cable can be carried
out without removing the front panel.
1. Remove the air inlet grille. Open the air inlet
grille upward and pull it toward you.
2. Remove the terminal cover and cord clamp.
3. Insert the connecting cable (or as according to
local regulations/codes) into the pipe hole on the
wall.
4. Pull the connecting cable through the cable slot
on the rear panel so that it protrudes about
15 cm out of the front.
5. Insert the connecting cable fully into the terminal
block and secure it tightly with screws.
6. Tightening torque: 1.2 N•m (0.12 kgf•m)
7. Secure the connecting cable with the cord clamp.
8. Attach the terminal cover, rear plate bushing and
air inlet grille on the indoor unit.
– 60 –
Page 61
FILE NO. SVM-10050
CAUTION
• Be sure to refer to the wiring system diagram
labeled inside the front panel.
• Check local electrical regulations for any
specific wiring instructions or limitations.
Cord clamp
Terminal cover
Screw
Connecting
cable
About 15 cm
Stripping length of the connecting cable
Screw
Fig. 10-3-6
20mm
110mm
10mm
80mm
Terminal block
1
2
3
Earth line
Connecting cable
Earth line
10-3-5. Piping and Drain Hose Installation
Piping and drain hose forming
• Since condensation results in machine trouble,
make sure to insulate both the connecting pipes
separately.
(Use polyethylene foam as insulating material.)
Rear right
Rear left
Bottom left
Changing
Left
drain hose
Bottom right
Die-cutting
Right
Front panel slit
Fig. 10-3-8
1. Die-cutting front panel slit
Cut out the slit on the left or right side of the front
panel for the left or right connection and the slit
on the bottom left or right side of the front panel
for the bottom left or right connection with a pair
of nippers.
2. Changing drain hose
For left connection, left-bottom connection and
rear-left connection’s piping, it is necessary to
relocate the drain hose and drain cap.
Piping preparation
110mm
10mm
10mm
50mm
Earth line
Fig. 10-3-7
NOTE :
WIRE TYPE :
More than 1.5mm². (H07 RN-F or 60245 IEC 66).
How to remove the drain cap
Clip drain cap with needle-nose pliers, and pull out.
Fig. 10-3-9
How to remove the drain hose
The drain hose is secured in place by a screw.
Remove the screw securing the drain hose, then
pull out the drain hose.
Heat insulator
Drain hose
– 61 –
Fig. 10-3-10
Page 62
FILE NO. SVM-10050
How to attach the drain cap
1. Insert hexagonal wrench (4 mm).
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.
If applied, deterioration and
Insert a hexagon
wrench (Ø4mm)
drain leakage of the drain
plug may occur.
In case of bottom right or bottom left piping
• After making slits on the front panel with a knife or
similar tool, cut them out with a pair of nippers or
an equivalent tool.
Slit
Fig. 10-3-14
Left-hand connection with piping
Bend the connecting pipes so that they are positioned within 43 mm above the wall surface.
If the connecting pipes are positioned more than
43 mm above the wall surface, the indoor unit may
be unstable.
When bending the connecting pipe, make sure to
use a spring bender to avoid crushing the pipe.
Refer to the table below for the bending radius
of each connection pipe.
Fig. 10-3-12
How to attach the drain hose
Always use the original screw that secured
the drain hose to the unit. If using a different
screw may cause water to leak.
Insert the drain hose firmly until the connector
contacts with the insulation, then secure it in place
using the original screw.
CAUTION
Securely insert the drain hose and drain cap;
otherwise, water may leak.
In case of right or left piping
• After making slits on the front panel with a knife or
similar tool, cut them out with a pair of nippers or
an equivalent tool.
Outer diameter
6.35 mm
12.7 mm, 15.88 mm
Bending radius
30 mm
50 mm
To connect the pipe after installation of the
unit (figure)
(To the forefront of flare)
520 mm
420 mm
R30 or less (Ø 6.35), R50 or less (Ø12.7, Ø15.88)
Use polishing (polyethylene core or the like for bending pipe).
43 mm
Gas side
Liquid side
Outward form of indoor unit
Use a screwdriver handle, etc.
Slit
Fig. 10-3-13
Fig. 10-3-15
NOTE :
If the pipe is incorrectly bent, the indoor unit may be
unstable on the wall.
After passing the connecting pipe through the pipe
hole, connect the connecting pipe to the auxiliary
pipes and wrap the facing tape around them.
– 62 –
Page 63
50 mm
or more
Do not rise
the drain hose.
Do not form the drain hose
into the waved shape.
Do not put the
drain hose end
into water.
Do not put the drain
hose end in the
drainage ditch.
Space for
pipes
Wall
Drain
guide
FILE NO. SVM-10050
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
Fig. 10-3-16
• Carefully arrange the pipes so that none of the
pipes stick out of the rear plate of the indoor unit.
• Carefully connect the auxiliary pipes and
connecting pipes to each other and cut off the
insulating tape wound on the connecting pipe to
avoid double-taping at the joint, moreover, seal
the joint with the vinyl tape, etc.
• Since condensation can result in machine
performance trouble, be sure to insulate both
connecting pipes. (Use polyethylene foam as
insulating material.)
• When bending a pipe, be careful not to crush it.
10-3-6. Indoor Unit Installation
1. Pass the pipe through the hole in the wall, and
hook the indoor unit on the installation plate at
the upper hooks.
2. Swing the indoor unit to right and left to confirm
that it is firmly hooked on the installation plate.
3. While pushing the indoor unit onto the wall, hook
it at the lower part on the installation plate.
Pull the indoor unit toward you to confirm that it
is firmly hooked on the installation plate.
Hook here
1
Installation plate
Connecting
cable
10-3-7. Drainage
1. Run the drain hose at a downward sloped angle.
NOTE :
• Hole should be made at a slight downward slant
Fig. 10-3-19
2. Put water in the drain pan and make sure that
the water is being drained outside.
3. When connecting extension drain hose, insulate
the connection part of extension drain hose with
shield pipe.
Shield pipe
Drain hose
Inside the room
Extension drain hose
Fig. 10-3-20
CAUTION
Hook
Push (unhook)
Fig. 10-3-17
• For detaching the indoor unit from the installation
plate pull the indoor unit toward you while pushing
the bottom up at the specified places.
Push Push
Fig. 10-3-18
Information
The lower part of indoor unit may fl oat,
due to the condition of piping and you
cannot fi x it to the installation plate. In
that case, use the % screws provided
to fi x the unit and the installation plate.
%
Screw
%
Screw
Install the drain pipe for proper drainage.
Improper drainage can result in water dripping
inside the room.
This air conditioner has been designed to drain
water collected from condensation which forms on
the back of the indoor unit, to the drain pan.
Therefore, do not locate the power cord and other
parts at a heigh place than the drain guide.
Fig. 10-3-21
– 63 –
Page 64
FILE NO. SVM-10050
10-4. Outdoor Unit
10-4-1. Installation Place
• A place which provides enough space around the
outdoor unit as shown in the diagram.
• A place which can bear the weight of the outdoor
unit and does not allow an increase in noise level
and vibration.
• A place where the operation noise and discharged air do not disturb neighbors.
• A place which is not exposed to a strong wind.
• A place free of combustible gases.
• A place which does not block a passageway.
• When the outdoor unit is to be installed in an
elevated position, be sure to secure its feet.
• This air conditioner accepts a connection piping
length of up to 20 m.
• There is no need to add refrigerant as long as the
length of the connection piping is 15 m or less.
• You will need to add 20 g of refrigerant per
meter of added connection piping for
installations requiring connection piping to be
between 16 m to 20 m.
• An allowable height level is up to 10 m.
• A place where the drain water does not cause any
problems.
Precautions for adding refrigerant
• Use a scale having a precision with at least 10 g
per index line when adding the refrigerant.
Do not use a bathroom scale or similar instrument.
• Use liquid refrigerant when refilling the refrigerant.
Since the refrigerant is in liquid form, it can fill
quickly.
Therefore, perform the filling operation carefully
and insert the refrigerant gradually.
CAUTION
1. Install the outdoor unit without anything
blocking the discharging air.
2. When the outdoor unit is installed in a place
always exposed to strong winds like on the
coast or on a high story of a building, secure
the normal fan operation using a duct or a
wind shield.
3. Especially in windy areas, install the unit to
prevent the admission of wind.
4. Installation in the following places may result
in trouble.
Do not install the unit in such places.
• A place full of machine oil.
• A saline-place such as the coast.
• A place full of sulfide gas.
• A place where high-frequency waves are
likely to be generated, such as from audio
equipment, welders, and medical equipment.
Strong
wind
Fig. 10-4-1
– 64 –
Page 65
FILE NO. SVM-10050
10-4-2. Draining the Water
• Holes are provided on the base plate of the
outdoor unit to ensure that the defrost water
produced during heating operations is drained off
efficiently.
If a centralized drain is required when installing the
unit on a balcony or wall, follow the steps below to
drain off the water.
1 . Proceed with water-proofing by installing the
water-proof rubber caps in the 2 elongated
holes on the base plate of the outdoor unit. [How
to install the water-proof rubber caps]
1) Place four fingers into each cap, and insert
the caps into the water drain holes by pushing
them into place from the underside of the
base plate.
2) Press down on the outer circumferences of
the caps to ensure that they hav e been
inserted tightly.
(Water leaks may result if the caps have not
been inserted properly, if their outer circumferences lift up or the caps catch on or wedge
against something.)
10-4-3. Refrigerant Piping Connection
Flaring
1. Cut the pipe with a pipe cutter.
90˚
Obliquity Roughness Warp
Fig. 10-4-4
2. Insert a flare nut into the pipe, and flare the pipe.
• Projection margin in flaring : A (Unit : mm)
Rigid (Clutch type)
Outer dia. of
copper pipe
6.35
9.52
R410A
tool used
0 to 0.5
0 to 0.5
Conventional
tool used
1.0 to 1.5
1.0 to 1.5
10
Water-proof rubber caps
(supplied with the outdoor unit)
Base plate
9 Drain nipple
Fig. 10-4-2
2. Install the drain nipple and a commercially
available drain hose (with 16 mm inside diameter), and drain off the water.
(For the position where the drain nipple is
installed, refer to the installation diagr am of the
indoor and outdoor units.)
• Check that the outdoor unit is horizontal, and
route the drain hose at a downward sloped
angle while ensuring that it is connected tautly.
12.7
0 to 0.5
Imperial (Wing nut type)
Outer dia. of
copper pipe
6.35
9.52
12.7
R410A
1.5 to 2.0
1.5 to 2.0
2.0 to 2.5
• Flaring size : B (Unit : mm)
Fig. 10-4-6
Outer dia. of copper pipe
6.35
9.52
1.0 to 1.5
Die Pipe
Fig. 10-4-5
B
+0
B
–0.4
R410A R22
9.1 9.0
13.2 13.0
A
Base plate
9 Drain nipple
Commercially available
drain hose
Do not use ordinary garden hose, but one can
flatten and prevent water from draining.
Fig. 10-4-3
12.7
16.6 16.2
• In case of flaring for R410A with the conventional
flare tool, pull it out approx. 0.5 mm more than that
of R22 to adjust to the specified flare size.
The copper pipe gauge is useful for adjusting
projection margin size.
– 65 –
Page 66
FILE NO. SVM-10050
Tightening Connection
Align the centers of the connecting pipes and tighten
the flare nut as much as possible with y our fingers.
Then tighten the nut with a wrench and torque
wrench as shown in the figure.
Half union
Externally
threaded side
Use a wrench
to secure.
Flare nut
Internally
threaded side
Use a torque wrench
to secure.
Fig. 10-4-7
CAUTION
• Do not apply excessiv e force.
Otherwise, the nut may break.
(Unit : N·m)
Outer dia. of copper pipe
Ø6.35 mm
Ø12.7 mm
Tightening torque
14 to 18 (1.4 to 1.8 kgf•m)
50 to 62 (5.0 to 6.2 kgf•m)
Use a vacuum pump
Be sure to use a vacuum pump with counter-flow
prevention function so that oil inside the pump does
not flow back into the air conditioner pipes when the
pump stops. (If oil inside the vacuum pump enters
into the air conditioner circuit which uses R410A,
trouble with the refrigeration system may develop.)
1. Connect the charge hose from the manifold valve
to the service port of the gas side packed valve.
2. Connect the charge hose to the port of the
vacuum pump.
3. Open fully the low pressure side handle of the
gauge manifold valve.
4 . Operate the vacuum pump to begin evacuating.
Perform evacuating for about 15 minutes if the
piping length is 20 meters (15 minutes for 20
meters) (assuming a pump capacity of 27 liters
per minute).
Confirm that the compound pressure gauge
reading is
5. Close the low pressure valve handle of gauge
manifold.
6. Open fully the valve stem of the packed valves
(both sides of Gas and Liquid).
7. Remove the charging hose from the service port.
8. Securely tighten the caps on the packed valves.
-101 kPa (76 cmHg).
• Tightening torque for connection of flare pipe
The pressure of R410A is higher than R22.
(Approx. 1.6 times.) Therefore securely tighten the
flare pipes which connect the outdoor unit and the
indoor unit with the specified tightening torque
using a torque wrench.
If any flare pipe is
incorrectly connected,
it may cause not only
Flare at
indoor unit
side
a gas leakage but also
trouble in the
refrigeration cycle.
Flare at
outdoor unit
side
Fig. 10-4-8
10-4-4. Evacuating
After the piping has been connected to the indoor
unit, perform the air purge.
AIR PURGE
Evacuate the air in the connecting pipes and in
the indoor unit using a vacuum pump.
Do not use the refrigerant in the outdoor unit.
For details, see the vacuum pump manual.
Compound pressure gauge
-101kPa (76cmHg)
Handle Lo
Charge hose (For R410A only)
Connecting pipe
Service port (Valve core (Setting pin))
Packed valve at liquid side
Pressure gauge
Manifold valve
Handle Hi
(Keep full closed)
Charge hose
(For R410A only)
Vacuum pump adapter for
counter-fl ow prevention
(For R410A only)
Vacuum
pump
Packed valve at gas side
Fig. 10-4-9
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.
– 66 –
Page 67
FILE NO. SVM-10050-1
Packed Valve handling precautions
• Open the valve stem all the way; but do not try to
open it beyond the stopper.
• Securely tighten the valve stem cap with torque in
the following table:
Gas side (Ø12.7 mm)
Liquid side (Ø6.35 mm)
Service port
50 to 62 N•m (5.0 to 6.2 kgf•m)
14 to 18 N•m (1.4 to 1.8 kgf•m)
14 to 18 N•m (1.4 to 1.8 kgf•m)
Hexagonal wrench is required.
4mm
Fig. 10-4-10
10-4-5. Wiring Connection
1. Remove the valve cover, the electric parts cover
and the cord clamp from the outdoor unit.
2. Connect the connecting cable to the terminal as
identified by the matching numbers on the
terminal block of indoor and outdoor unit.
3. Insert the power cord and the connecting cable
fully into the terminal block and secure it tightly
with screws.
4. Insulate the unused cords (conductors) from water
entering in the outdoor unit. Locate them so that
they do not touch any electrical or metal parts.
5. Secure the power cord and the connecting cable
with the cord clamp.
6. Attach the electric parts cover and the valve
cover on the outdoor unit.
Stripping length of connecting cable
Terminal block
1 2 3 L N
3
2
1
01
01
30
Connecting cable Power cord
40
L
N
01
0
1
30
40
Earth lineEar th line
Fig. 10-4-12
Model
Power source
Maximum running
current
Installation fuse
rating
Power cord
Connection cable
RAS-18SKV-E
RAS-18SKVR-E
RAS-18SKV2-E
RAS-18SKV-A
RAS-18SKVR-A
RAS-18SKV-ND
220-240V, 50Hz, Single phase
220-230V, 60Hz
220-240V, 50Hz (RAS-18,22SKV-A,
12.0 A 13.5 A
16 A breaker or fuse
(All types can be used.)
H07RN-F or 245IEC66 (1.5 mm²)
H07RN-F or 245IEC66 (1.0 mm²)
RAS-22SKV-E
RAS-22SKVR-E
RAS-22SKV2-E
RAS-22SKV-A
RAS-22SKVR-A
RAS-22SKV-ND
18,22SKVR-A)
CAUTION
• Incorrect wiring connection may cause
electrical parts to burn out.
• Be sure to comply with local regulations/codes
when running the wire from outdoor unit to
indoor unit.
(Size of wire and wiring method etc.)
• Every wire must be securely connected.
• If incorrect or incomplete wiring is carried out,
fire or smoke may result.
• Prepare the power supply for the exclusive
use of the air conditioner.
• This product can be connected to the main
breaker.
Connection to fixed wiring:
A switch which disconnects all poles and has
a contact separation of at least 3 mm must be
incorporated in the fixed wiring when connecting to a main breaker circuit.
Connecting cable
Fig. 10-4-11
Power cord
– 67 –
Page 68
FILE NO. SVM-10050
10-5. Test Operation
10-5-1. Gas Leak Test
• Check the flare nut connections for gas leaks with
a gas leak detector and/or soapy water.
Check places
for the indoor unit
Electric parts cover
Check places for
the outdoor unit
Fig. 10-5-1
10-5-2. Test Operation
To test the system, push and hold RESET button for
10 sec. (There will be one short beep.)
Valve cover
10-5-4. Remote Controller A or B Selection
Setting
When two indoor units are installed in the
separated rooms, it is not necessary to change
the selector switches.
Remote controller A or B selection
• When two indoor units are installed in the same
room or adjacent two rooms, if operating a unit,
2 units may receive the remote controller signal
simultaneously and operate. In this case, the
operation can be preserved by setting either one
indoor unit or remote controller to B setting.
(Both are set to A setting in factory shipment.)
• The remote controller signal is not received when
the settings of indoor unit and remote controller are
different.
• There is no relation between A setting/B setting and A
room/B room when connecting the piping and cables.
Remote controller A- B selection
To separate using of remote controller for each indoor
unit in case of 2 air conditioner are installed nearly.
Hi POWER FILTER PAP TIMER OPERATION
RESET
RESET button
Fig. 10-5-2
10-5-3. Auto Restart Setting
This product is designed so that, after a power
failure, it can restart automatically in the same
operating mode as before the 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
• Push and hold the RESET button for about 3
seconds. After 3 seconds, three short electric
beeps will be heard to inform you that the Auto
Restart has been selected.
• To cancel the Auto Restart, follow the steps
described in the section Auto Restart Function on
Owner’s Manual.
Remote controller B Setup.
1. Push RESET button on the indoor unit to turn the
air conditioner ON.
2. Point the remote controller at the indoor unit.
3. Push and hold CHK button on the remote controller
by the tip of the pencil.
“00” will be shown on the display.
4. Push MODE during pushing CHK, “B” will show on
the display and “00” will disappear and the air
conditioner will turn OFF.
The remote controller B is memorized.
Note :
1. Repeat above step to reset Remote Controller to
be A.
2. Remote controller A have not “A” display.
3. Detault setting of remote controller from factory is A.
“B” Display
“00” Display
PRESET
ONE-TOUCH
QUIET
SWING
TIMER
SLEEP
CHK FILTER CLOCK
Fig. 10-5-3
MODE
COMFORT
PURE
SELECT
FIX Hi-POWER ECO
ON OFF
FAN
CLR
SET
– 68 –
Page 69
FILE NO. SVM-10050-1
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
6
7
8
9
10
Precautions when handling the new inverter (3DV Inverter)
First Confirmation
Primary Judgment
Judgment by Flashing LED of Indoor Unit
Self-Diagnosis by Remote Controller (Check Code)
Judgment of Trouble by Every Symptom
Check Code 18 and 1E
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
Troubleshooting Procedure
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 (3DV inverter) will be incorporated starting with this unit.
The control circuitry has an uninsulated construction.
IGBT × 6
Shared potential
Driver
Amplifier
FET × 6
Driver
MCU
Amplifier
Fig. 11-1
(3DV: 3-shunt Discrete Vector control)
Compressor
Fan motor
– 69 –
Page 70
FILE NO. SVM-10050
CAUTION
A high voltage (equivalent to the supply voltage) is also energized to ground through the
sensors, PMV and other low-voltage circuits.
The sensor leads and other wires are covered with insulated tubes for protection.
Nevertheless, care must be taken to ensure that these wires are not pinched.
Take sufficient care to avoid directly touching any of the circuit parts without first turning off
the power. At times such as when the circuit board is to be replaced, place the circuit board
assembly in a vertical position.
Laying the board flat on an electrically conductive object (such as the top panel of the air conditioner’s
outdoor unit) while a charge is still retained by the electrolytic capacitors of the inverter’s main circuit may
cause short-circuiting between the electrolytic capacitors and secondary circuit components and result in
damage to the components.
Sensor leadsSensor leads
Fig. 11-2
Do NOT lay the circuit board assembly flat.
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 4 mounting claws.
2. As shown below, connect the discharge resistance (approx. 100Ω, 40W) or plug of the soldering iron to
voltage between + – terminals of the C14 (“CAUTION HIGH VOLTAGE” is indicated.) electrolytic capacitor
(18SAV-E : 500µF /400V, 22SAV-E : 760µF /400V) on P.C. board, and then perform discharging.
Discharging position
(Discharging period
10 seconds or more)
Plug of
soldering iron
– 70 –
Inverter cover
P. C. board
(Soldered surface)
Fig. 11-3
Page 71
FILE NO. SVM-10050
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 table.
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
maintaining of air conditioner.
Table 11-1-1
No.
1
2
3
4
5
Operation of air conditioner
When power breaker is turned “ON”, the
operation indicator (Green) of the indoor
unit flashes.
Compressor may not operate even if the
room temperature is within range of
compressor-ON.
In Dry and ECO mode, FAN (air flow)
display does not change even though FAN
(air flow select) button is operated.
Increasing of compressor motor speed
stops approx. 30 seconds after operation
started, and then compressor motor speed
increases again approx. 30 seconds after.
In AUTO mode, the operation mode is
changed.
Description
The OPERATION lamp of the indoor unit flashes when power
source is turned on. If [
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.
] button is operated
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.
– 71 –
Page 72
FILE NO. SVM-10050
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)
• When turn ON power supply.
• Power supply ON after failure or OFF.
• This flashing display is not air conditioner failure.
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. Some check code will flash display of the indoor unit, when the air conditioner operates with some limitation.
2. Some check code will flash display of the indoor unit and stop operation of the air conditioner.
3. When item B and C or item B and apart of item E occur concurrently, priority is given to the block of item B.
4. The check codes can be confirmed on the remote controller for servicing.
– 72 –
Page 73
FILE NO. SVM-10050-1
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 5 Hz and it will beep for 10 seconds
(Beep, Beep, Beep ... ). The timer lamp usually flashes (5 Hz) during self-diagnosis.
11-4-1. How to Use Remote Controller in Service Mode
1
Push [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.
PRESET
ONE-TOUCH
QUIET
SWING
TIMER
SLEEP
CHK
TOSHIBA
FAN
TEMP
TEMP
MODE
COMFORT
PURE
FIX Hi-POWER ECO
ON
FILTER
SLEEP
OFF
CLOCK
Push [ON ] or [OFF ] button
2
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 :
• • •
• 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.
• Push [ON ] or [OFF ] button to change the check code
backward.
CLR
If there is a fault, the indoor unit will beep for 10 seconds
SET
(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.)
Alphanumeric characters are
used for the check codes.
is 5. is 6.
is A. is B.
is C. is D.
Push [CLR] button.
3
After service finish for clear service code in memory.
• “7F” is indicated on the display of the remote controller.
Push [ ] button to release the service mode.
4
• The display of the remote controller returns to as it was
before service mode was engaged.
Fig. 11-4-1
– 73 –
Page 74
FILE NO. SVM-10050
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.
– 74 –
Page 75
FILE NO. SVM-10050
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.
– 75 –
Page 76
FILE NO. SVM-10050
Block distinction
Check
code
Outdoor
P.C. board
Not
displayed
Block
Check
code
Operation of diagnosis function
Cause of operation
Inverter over-current
protective circuit operates.
(Short time)
Position-detect circuit error
or short-circuit between
windings of compressor
Current-detect circuit error
Being out of place,
disconnection or
shortcircuit of the outdoor
heat exchanger sensor
(TE) or suction temp.
sensor (Ts)
Disconnection or
shortcircuit of discharge
temp. sensor
Outdoor fan drive system
error
Outdoor heat exchanger
temp. sensor error
Air
conditioner
status
All off
All off
All off
All off
All off
All off
Operation
continues
Remarks
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
——
Judgment and action
Even if trying operation again, all
operations stop immediately. :
Replace P.C. board.
1. Even if connecting lead wire of
compressor is removed, positiondetect circuit error occurred. :
Replace P.C. board.
2. Measure resistance between
wires of compressor, and
perform short-circuit. :
Replace compressor.
Even if trying operation again, all
operations stop immediately. :
Replace P.C. board.
1. Check sensors (TE, TS).
2. Check P.C. board.
1. Check discharge temp. sensor
(TD).
2. Check P.C. board
Position-detect error, over-current
protective operation of outdoor fan
drive system, fan lock, etc. :
Replace P.C. board or fan motor.
1.
Check outdoor temp. sensor (TO).
2. Check P.C. board.
Outdoor
P.C. board
Others
(including
compressor)
Compressor drive output
error, Compressor error
(lock, missing, etc.)
Return serial signal has
been sent when operation
started, but it is not sent
from halfway.
1) Compressor thermo.
operation
Gas shortage
Gas leak
2) Instantaneous power
failure
Compressor does not
rotate.(Current protective
circuit does not operate
when a specified time
passed after compressor
had been activated.)
Discharge temp. exceeded
117°C
Break down of compressor
4-way valve inverse error
(TC sensor value lowered
during heating operation.)
All off
Operation
continues
All off
All off
All off
Operation
continues
Displayed when
error is detected.
Flashes when
trouble is detected
on return serial
signal, and normal
status when signal
is reset.
Displayed when
error is detected.
Displayed when
error is detected.
Displayed when
error is detected.
——
When 20 seconds passed after
start-up, position-detect circuit error
occurred. : Replace compressor.
Trouble on PMV
1. Repeat Start and Stop with
interval of approx. 10 to 40
minutes. (Code is not displayed
during operation.)
Supply gas.
(Check also gas leak).
2. Unit operates normally during
check.
If return serial signal does not
stop between indoor terminal
block 2 and 3, replace inverter
P.C. board.
If signal stops between indoor
terminal block 2 and 3, replace
indoor P.C. board.
1. Trouble on compressor
2. Trouble on wiring of compressor
(Missed phase)
1. Check dischage temp. sensor
(TD).
2. Gas leakage
3. Trouble on PMV
1. Check power voltage.
(220–230–240 V +10%)
2. Overload operation of
refrigeration cycle
Check installation condition
(Short-circuit of outdoor diffuser).
1. Check 4-way valve operation.
– 76 –
Page 77
11-5. Judgement of Trouble by Every Symptom
11-5-1. Indoor unit (Including remote controller)
(1) Indoor unit is not operated.
FILE NO. SVM-10050
Operation
Check Item
Considerable principle cause
Turn off power supply once, and
5 second later, turn it on again.
NO
Is OPERATION indicator flashing?
Is it possible to turn on
on remote controller?
Unit operates normally.
Is fuse (F01)
of indoor control
board blown?
NO
Is voltage
(DC5V, 12V and 15V)
indicated on rear of
indoor control
board normal?
NO
YES
A/C by pushing
[ ] button
YES YES
YES
YES
Does transmission mark
NO NO
on remote controller flash
normally,and is its signal
Point remote to digital
camera. Can see infrared
when push [ ] button?
Does connection
between PC Board
and reciver PCB
are connect properly?
NO
Reconnect housing
transmitted properly?
ray at sending LED
on camera monitor
YES
motor connector
between CN10 1 –
YES
YES
Microcomputer
NO
Does fan
3 short-circuit?
NO
is defective.
Measures
Item by symptoms
Remote controller is defective.
Refer to (5) “Troubleshooting
for remote controller”.
Replace remote control
YES
Replace main
P.C. board
(2) Operation is not turned on though Indoor P.C. board is replaced
<Confirmation procedure>
Turn on power supply.
Does OPERATION indicator flash?
NO
Is wired correctly to white and
black lead wires of terminal block?
YES
– 77 –
Replace fan
motor.
NO
Correct wiring
To item of
“Indoor unit is not operated”.
Page 78
FILE NO. SVM-10050
(3) Only the indoor motor fan does not operate
<Primary check>
1. Is it possible to detect the power supply voltage (AC220–240V) between
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.)
Turn off power
supply once, and
turn it on again.
1
and
on the terminal block?
2
Does fan motor
continue to operate?
NO
Does check
operation LED flash?
YES
Start to operate
indoor unit in cooling
operation at airflow
level “LOW”.
Does indoor
fan operate?
YES
YES
Is it possible to detect
DC 1V or more between
+ and
5
motor connector (CN
– of
3
YES
Does check connecting
NO
cable or power supply
cord complely?
YES
Does check
5V at display unit?
YES
Is it possible to detect
NO
DC 294–325V between
1
+ and 3 – of motor
connector (CN31).
YES
(Motor connection condition)
Is it possible to detect DC 15V
between 4 + and 3 – of
motor connector (CN31).
YES
31
NO
).
NO
NO
Reconnecting the
in terconnection cable
and terminal block
Does check 5V
at main P.C board?
NO
Peplace indoor
fan motor.
YES
Replace
display unit
NO
Turn off indoor unit and remove
NO
connector from motor.
Then push [ ] button
on remote controller to stop
flashing lamp on indoor unit.
Change airflow level
to “HIGH”.
A
Start to operate the
indoor unit in except
heating operation.
At this time, is it possible to
detect DC 1V or more between
5 + and 3 – of motor
connector (CN31)?
YES
B
Is it possible to detect
DC 15V between 4 +
and 3 – of motor
connector (CN31).
Turn off indoor unit and
NO
remove connector from motor.
Then start to operate indoor
unit with remote controller.
Start to operate the
indoor unit in except
heating operation.
At this time, is it possible
to detect DC 1V or more
between
of motor connector (CN31)?
5
(Check this condition
within 15 seconds after
starting unit.)
– 78 –
YES
+ and 3 –
YES
NO
NO
Peplace main
P.C. board.
Page 79
FILE NO. SVM-10050
A
Is it possible to
change airflow level
to “HIGH”?
YES
Fan motor
operates normally.
NO
B
Is it possible to
rotate cross-flow fan by
hand properly?
YES
Turn off indoor unit
and rotate cross-flow
fan by hand when the
unit is on standby.
At this time, is it possible to
detect DC 1V or more
between 5 + and 3 –
of motor connector
(CN
31).
YES
Does check display
on remote show high?
YES
Change the new PC
board. Does fan speed
change?
YES
NO
Does check cross-flow
NO
NO
NO
fan bearing normal
condition?
YES
NO
Replace
remote
Replace
motor
Replace bearing
of cross-flow fan.
Replace indoor
fan motor.
Peplace main
P.C. board.
– 79 –
Page 80
FILE NO. SVM-10050
(4) Indoor fan motor automatically starts to rotate by turning on power supply
<Cause>
The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor.
If the P.C. board is soldered imperf ectly or the IC is defective, the fan motor may automatically rotate by turning
on power supply.
<Inspection procedure>
1. Turn on breaker.
2. After Fan motor operate, off A/C by remote controller.
3. Turn off breaker for a while, then turn it ON.
3.1. If fan motor not operate, it means an unit in Auto-restart operation. (see more detail in P. 50-51)
3.2. If Fan motor still operate, follow the below.
3.2.1. Remove the grille.
3.2.2. Remove the cover terminal by release one screw.
3.2.3. Check DC voltage with CN31 connector while the fan motor is rotating.
NOTE :
• Do not disconnect the connector while the fan motor is rotating.
• Use a thin test rod.
Indoor fan starts rotating when power supply is turned on.
(Check output DC voltage of fan motor on P.C. board.)
Measure voltage between 3 (GND : BLACK)
and 5 (V line : YELLOW) of motor connector (CN31)
while indoor fan motor is rotating.
DC 1.0V or more
P.C. board is defective.
Under DC 1.0V
Motor is defective.
Yellow
Black
DC
P.C. board
CN31
6 (Blue)
5 (Yellow)
4 (White)
3 (Black)
2 –
1 (Red)
Replace P.C. board. Replace motor.
– 80 –
Page 81
FILE NO. SVM-10050
(5) Troubleshooting for remote controller
<Primary check>
Check that A or B selected on the main unit is matched with A or B selected on the remote controller.
Is receiver
on indoor unit
exposed to
direct sunlight?
YES
NO
Is there any
fluorescent light
nearly?
YES
NO
NO
Push the [ ] button.
Is transmission
mark indicated?
YES
Reset by take off
[ ] button till LCD
indication disclear
put battery again.
Does indoor unit
operate when moving
remote controller
near receiver or
indoor unit?
YES
Batteries are
exhausted.
The unit does not beep at all.
Operation lamp on indoor
unit is not indicated.
NO
battery the push
Avoid direct
sunlight.
NO
Replace main
P.C. Board
Keep indoor unit
away from
fluorescent light.
Does A/C operate?
by push RESET button
of indoor unit.
YES
Point remote to
digital camera can
see infrared at sending
LED on carmera monitor
when push [ ] button?
YES
Reciver P.C. board
is defective.
Replace reciver
P.C. board.
NO
NO
Replace
batteries.
Push the
[ ] button
Is transmission
mark indicated?
YES
Does indoor unit
beep and operate?
YES
Normal
operation
NO
Remote controller
is defective.
Replace
remote controller.
– 81 –
Page 82
FILE NO. SVM-10050
11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)
(1) Outdoor unit does not operate
1) Is the voltage between and of the indoor terminal block varied?
2
Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the following diagram.
NOTE:
• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.
• Be sure to prepare a diode for judgment.
Terminal block at indoor side
Red
White
3
2
1
3
S5277G
Terminal block
S5277G or equivalent
(Diode with rated voltage of 400V
or more is acceptable.)
Tester
Normal time : Voltage swings between DC15 and 60V. ...................Inverter Assembly chec k (11-8-1.)
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.
– 82 –
Page 83
11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E
<Check procedure>
1C 1E
Gas leakage,
disconnection of TS/TC
sensors (Check code 02, 1C)
Valve drive check
Discharge temp. error,
gas leakage
(Check code 03, 1E)
FILE NO. SVM-10050
Is coil of the pulse motor valve
(P.M.V.) correctly set?
YES
Is connecter of coil connected to inverter?
YES
Disconnect PMV connector then check coil resistance.
(white-Red, Red-Orange, Yellow-Red, Blue-Red)?
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).
Is it 46±4Ω/Phase
YES
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 RESET button on indoor unit
(“Beep” sound is heard if keeping pushed RESET button 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
– 83 –
Replace valve.
Add gas.
Page 84
11-7. Troubleshooting
11-7-1. How to Check Whether the Air Purifier is Good or Not
(RAS-18, 22SKVR-E, RAS-18, 22SKVR-A only)
Turn off the power breaker once,
and turn on again after 10 seconds.
FILE NO. SVM-10050
Does the OPERATION indicator flash?
YES
Turn off the power breaker and remove
CN41 (Micro switch connector).
Short-circuit between and pin
of CN41 at PC side, and turn on the
power breaker after 10 seconds.
Is DC12V applied
between (Red/DC12V) and
(Brown/GND) of CN1 of the
Primary checkOperation check
micro-switch connector under
OFF status of the micro-switch
micro-switch connector under
ON status of the micro-switch
1) Check operation while short-circuiting CN41 of the main P.C. board.
2) Perform air purifying operation by the remote controller.
3) Be sure not to touch the electric dust collector, ionizer, or ionized wire unit with the human body.
1
high-voltage generator?
Is there conduction of
(Front panel opened)?
Is there conduction of
(Front panel closed)?
• In this time, check that the remote controller is in status which is shortened by time on
the reactivation preventive timer and all display indicators go on for approx. 3 seconds
when a signal is received.
If time on the reactivation preventive timer is not shortened,
( )
the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.
• While the air purifier operates, check that the fan speed [AUTO] is not displayed.
(Because the power ON/OFF is controlled on the program)
1
YES
NO
YES
NO
2
NO NO
YES
NO
Is DC12V applied
between (+) and (–) of
CN42 of the main P.C. board?
1
YES
Micro-switch is stuck
Micro-switch malfunction
2
To item “Power supply is not turned on”
Replace the main P.C. board (MCC5045)
Replace micro-switch.
• Conduction check of micro-switch
Push the switch
ON
→ ON
Release the switch
→ OFF
Tester
Does the indoor fan rotate?
YES
Does the PURE indicator (Blue) or
the FILTER indicator (Orange) go on?
YES
Does the PURE indicator
go off within 2 seconds after
it was ON, and does the FILTER
indicator (Orange) go on?
YES
Are the electric dust
collector and ionizer dried?
(Electrode check)
YES
Refer to items, cleaning and check
for the electric dust collector/ionizer/
ionized wire units.
When the ionized wire is
disconnected or when dirt is
( )
not cleaned even cleaned,
replace each unit.
NO
NO
NO
NO
Is DC-5V to DC-10V
applied between
(Brown/Negative voltage)
4
2
and (Brown/GND)
of CN42 of the main
P.C. board?
Dry the electric
dust collector
and ionizer.
Referring to the right figure, check the
high-output voltage of the air filter unit.
(NOTE)
Use an exclusive high voltage tester;
otherwise the tester may be broken.
Is output of the ionizer
approx. 4.0 kV to 4.8 kV?
Is output of the collector
approx. 3.0 kV to 3.8 kV?
Are the electric dust
YES
collector/ionizer/ionized
wire units dirty?
Is an abnormal sound
(cracking noise) heard
from the electrode?
YES
YES
YES
To item “Only indoor fan does not operate”
Replace the main P.C. board.
• How to check output of the air purifier
NO
Be sure not to come
to contact to the gray
part or not to touch
the ionized cables.
NO
NO
<Caution on High Voltage!!>
High-voltage tester
Replace the high-voltage generator.
No trouble
GND
Collector
output
Ionizer
output
– 84 –
Page 85
11-7-2. How to Check Whether the Minus Ion Generator is Good or Not
(RAS-18, 22SKVR-E, RAS-18, 22SKVR-A only)
Turn off the power breaker once,
and turn on again after 10 seconds.
FILE NO. SVM-10050
1
NO
YES
NO
NO
Micro-switch malfunction
Does the OPERATION indicator flash?
YES
Turn off the power breaker and remove
CN41 (Micro switch connector).
Short-circuit between and pin
of CN41 at PC side, and turn on the
power breaker after 10 seconds.
Is DC12V applied between
(Red/DC12V) and (Brown/GND) of
CN1 of the high-voltage generator
Primary checkOperation check
micro-switch connector under
OFF status of the micro-switch
micro-switch connector under
ON status of the micro-switch
1) Check operation while short-circuiting CN41 of the main P.C. board.
2) Perform air purifying operation by the remote controller.
• In this time, check that the remote controller is in status which is shortened by time on
• While the air purifier operates, check that the fan speed [AUTO] is not displayed.
3) Be sure not to touch the electrode with the human body.
in the air purifier?
Is there conduction of
(Front panel opened)?
Is there conduction of
(Front panel closed)?
the reactivation preventive timer and all display indicators go on for approx. 3 seconds
when a signal is received.
If time on the reactivation preventive timer is not shortened,
( )
the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.
(Because the power ON/OFF is controlled on the program)
1 2
2
YES
NO
YES
Micro-switch is stuck
To item “Power supply is not turned on”
Replace the main P.C. board
or the housing assembly.
Replace micro-switch.
• Conduction check of micro-switch
Push the switch
ON
→ ON
Release the switch
→ OFF
Tester
Does the indoor fan rotate?
YES
Does the PURE indicator (Blue) or
the FILTER indicator (Orange) go on?
YES
Does the PURE indicator
go off within 2 seconds after
it was ON, and does the FILTER
indicator (Orange) go on?
NO
Referring to the right figure, check the high-voltage output of the air ionizer.
In this time, peel the thermal insulator, and attachit to the original position
after check operation.
NOTE :
Use an exclusive high voltage tester; otherwise the tester may be broken.
NO
Does the electrode
output approx. –6kV?
NO
Replace the
high-voltage generator.
NO
NO
YES
YES
No trouble
To item “Only indoor fan does not operate”
Replace the main P.C. board.
To item “How to check whether
the air purifier is good or not”
• How to check output of the air purifier
<Caution on High Voltage!!>
Electrode
High voltage unit
GND
+
-
– 85 –
High Voltage tester
Page 86
11-8. How to Diagnose Trouble in Outdoor Unit
Check Power Supply
(Voltage Rate ±10%)
YES
Turn OFF power
supply.
Remove connector
of compressor.
FILE NO. SVM-10050
Check 25A
fuse (F01)
failure?
YES
Turn ON power
Supply.
Check terminal
Voltage of electrolytic
capacitor are in
(Voltage Rate
±10%) x 1.414?
NO
NO
NO
Replace
control board.
Check component
parts of control board
assembly by visual.
(damage, burn,.. Etc.)
YES
Replace
fuse.
• Connect discharge
resistance (approx. 100Ω,
40W) or soldering iron
(plug) between +, –
terminals of the electrolytic capacitor (500µF )
of C14 (with printed
CAUTION HIGH VOLTAGE)
on P.C. board.
Discharging position
(Discharging period
10 seconds or more)
Plug of
soldering
iron
YES
Turn ON the unit
by remote controller
and wait for 3 min.
(Cooling : 17°C)
A
Replace
control board.
– 86 –
Page 87
FILE NO. SVM-10050
A
Compressor
is normal
YES
Does outdoor fan
operate normally?
YES
Does compresser
operate normally?
NO
Turn OFF power
supply.
Check compressor
winding resistance
correct?
YES
NO
NO
Replace outdoor
fan motor.
NO
Turn OFF power
supply.
Remove connector CN300 of
outdoor fan motor.
Check winding resistance by
ohmmeter are correct?
Check rotor locking by rotate
with hand. Can it rotate?
YES
Replace control
board.
Turn ON power
supply.
Check voltage of the
compressor connector
is in rate.
(AC150V-270V)?
YES
Replace
compressor.
Replace
compressor.
NO
Replace control
board.
– 87 –
Page 88
FILE NO. SVM-10050
11-9. How to Check Simply the Main Parts
11-9-1. How to check the P.C. board (Indoor unit)
(1) Operating precautions
1) When removing the front panel or the P.C.
board, be sure to shut off the 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.
11-9-2. How to shorten time for start the compressor.
1. Turn on remote.
2. Setting requirment operation.
3. Push off remote.
4. Press [SET] button while pressing [CHECK] button
with a tip of a pencil.
5. Then press [ ] button to transmit the signal to the
indoor unit.
(2) Inspection procedures
1) When a P.C. board is judged to be defective,
check for disconnection, burning, or discoloration of the copper foil pattern or this P.C. board.
2) The P.C. board consists of the following 2 parts
a. Main P.C. board part:
DC power supply circuit (5 V, 12 V),
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:
PRESET
ONE-TOUCH
FAN
TEMP
MODE
COMFORT
QUIET
SWING
TIMER
PURE
SLEEP
FIX Hi-POWER ECO
ON
CHK
FILTER
OFF
CLOCK
This setting helps to shortern a compressor waiting period when operate cool, heat or dry mode.
A compressor suddenly starts one order of Remote controller is received.
– 88 –
Page 89
11-9-2. P.C. Board Layout
GND
+5V
+12V
100
30
40
50
60
70
80
90
20
10
0
0102030 4050
Resistance value (kΩ)
Temperature ( C)
TD : Discharge temp. sensor
TA : Room temp. sensor
TC, TCJ : Heat exchanger temp. sensor
TO : Outdoor temp. sensor
TE : Outdoor heat exchanger temp. sensor
TS : Suction temp. sensor
TA, TC, TCJ, TO, TE, TS
TD
[RAS-18, 22 Series]
FILE NO. SVM-10050
[1] Sensor characteristic table
– 89 –
Page 90
11-9-3. Indoor Unit (Other Parts)
FILE NO. SVM-10050
No.
1
Room temp. (TA) sensor
Part name
Heat exchanger (TC) sensor
2
Remote controller
3
Louver motor
MP24Z3T
4
Indoor fan motor
11-9-4. Outdoor Unit
No.
1
Compressor
(Model : DA130A1F-27F)
~ 18SAV
(Model : DA150A1F-20F)
~ 22SAV
Part name
Series
Series
Checking procedure
Disconnect the connector and measure the resistance value with tester.
(Normal temp.)
Sensor
Temperature
TA, TC (kΩ)
10°C 20°C 25°C 30°C 40°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
2
2
3
3
4
4
5
5
Position
1 to 2
1 to 3
1 to 4
1 to 5
Resistance value
250 ± 20Ω
1
1
Refer to 11-5-1. (3) and (4).
Checking procedure
Measure the resistance value of each winding by using the tester.
Red
White Black
Position
Red - White
White - Black
Black - Red
Resistance value
DA130A1F-27F DA150A1F-20F
0.92 to 1.02Ω 0.88 to 0.98Ω
Under 20°C
2
Outdoor fan motor
(Model : ICF-140-43-4R)
3
4-way valve coil
(Model : STF)
4
Pulse motor valve coil
(Model : CAM-MD12TF)
5
Outdoor temperature sensor
(TO), discharge temperature
sensor (TD), suction
temperature sensor (TS),
outdoor heat exchanger
temperature sensor (TE)
Measure the resistance value of winding by using the tester.
Red
White Black
Position
Red - White
White - Black
Black- Red
Resistance value
20 to 22Ω
20 to 22Ω
20 to 22Ω
Under 20°C
Measure the resistance value of winding by using the tester.
Resistance value
1435 ± 144Ω
Under 20°C
Measure the resistance value of winding by using the tester.
Position
Red - White
White - Orange
Brown- Yellow
Brown- Blue
Resistance value
42 to 50Ω
42 to 50Ω
42 to 50Ω
42 to 50Ω
Under 20°C
Disconnect the connector, and measure resistance value with the tester.
(Normal temperature)
Sensor
Temperature
TD (kΩ)
TO,TS,TE (kΩ)
10°C 20°C 25°C 30°C 40°C 50°C
100 62 50 41 27 18
20.7 12.6 10.0 7.9 4.5 —
– 90 –
Page 91
11-9-5. Checking Method for Each Part
FILE NO. SVM-10050
No.
1
2
Part name
Electrolytic capacitor
(For boost, smoothing)
Diode block
Checking procedure
1. Turn OFF the power supply breaker.
2. Discharge all three capacitors completely.
3. Check that safety valve at the bottom of capacitor is not broken.
4. Check that vessel is not swollen or exploded.
5. Check that electrolytic liquid does not blow off.
6. Check that the normal charging characteristics are shown in continuity test by the
tester.
C12 C13 C14
MCC-5009
Soldered
Heat sink IGBT side
C12, C13, C14 → 18SAV-E: 500µF/400V, 22SAV-E: 760µF/400V
1. Turn OFF the power supply breaker.
2. Completely discharge the four electrolytic capacitors.
3. Remove the diode block from the P.C. board (which is soldered in place).
4. Use a multimeter with a pointer to test the continuity, and check that the diode
block has the proper rectification characteristics.
+
1
~~
23
–
4
surface
~
+–~
12 3
(DBO1)
4
Case that product is good
Pointer swings once, and returns slowly.
When performing test once again under
another polarity, the pointer should return.
Tester rod
+
~
2
~
+
3
~
–
4
~
10 to 20 Ω when the multimeter probe is
reversed
Resistance value
–
in good product
1
2
3
∞
– 91 –
Page 92
FILE NO. SVM-10050
11-10. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad
1. Symptom
• Outdoor fan motor does not rotate.
• Outdoor fan motor stops within several 10 seconds though it started rotating.
• Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc.
Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”
2. Cause
The following causes are considered when the outdoor fan motor does not normally rotate.
1) Mechanical lock of the outdoor fan motor
2) Winding failure of the outdoor fan motor
3) Position-detect circuit failure inside of the outdoor fan motor
4) Motor drive circuit failure of the outdoor P.C. board
3. How to simply judge whether outdoor fan motor is good or bad
Turn OFF the breaker.
Disconnect two connectors (CN300) of the
outdoor fan motor from the outdoor P.C. board.
Does the fan rotate without trouble
when rotating it with hands?
YES
If the resistance value between
1 (Red lead) – 2 (White lead)
2 (White lead) – 3 (Black lead)
3 (Black lead) – 1 (Red lead)
of the connector
(CN300 : Motor winding)
is 20 to 22Ω, it is normal.
YES
Fan motor is normal.
(Outdoor P.C. board error)
NO
NO
CN300
Fan motor error
NOTE :
However, GND circuit error inside of the motor may be accepted in some cases when the above check is
performed.
When the fan motor does not become normal even if P.C. board is replaced, replace the outdoor fan motor.
– 92 –
Page 93
FILE NO. SVM-10050
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 may 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
circuitry, 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.
1
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.
Remarks
3) Remove the left and right air filters.
Remove the plasma air purifier.
(for model RAS-18, 22SKVR-E only)
– 93 –
Page 94
FILE NO. SVM-10050
No.1Part name
Front panel
Procedures
4) Push “PUSH” part under the front panel and
remove hooks of the front panel from the
installation plate.
5) Remove the front panel fixing screws.
(4 pcs.)
6) Take off four hooks of panel from rear side.
Remarks
Installation plate
Front panel
Push
4 screws
<How to assemble the front panel>
1) Push 3 center positions and 2 lower center
positions of the air outlet, and then hang
the hanging hooks (4 pcs.) at the top side
of the front panel to the rear plate.
2) Insert the plasma air purifier
(for model RAS-18, 22SKVR-E).
Push in the plasma air purifier until the
protrusions on both sides are completely
inserted into the holders.
If installation is incomplete, the FILTER
indicator (orange) may light.
3) Tighten four screws.
• Incomplete hanging or incomplete
pushing may cause a dewdrops or
generation of a fluttering sound.
Holder
Holder
Protrusion
Protrusion
2 Screws
four hooks
Plasma air purifier
Plasma air purifier
Protrusion
Protrusion
Holder
Holder
– 94 –
Plasma air purifier
Plasma air purifier
Page 95
FILE NO. SVM-10050
No.
2
Part name
High voltage generator
(only in model
RAS-18, 22 SKVR-E)
Procedures
1) Follow to the procedure in the
item 1 .
2) To remove the air ionizer from
the back body, pull it toward you.
3) Disconnect the connectors of
the high voltage generator.
4) Remove the fixing screws
(2 pcs) and remove the high
voltage generator from the
evaporator.
2 screws
2 screws
Remarks
Connectors
Connectors
<How to assemble the high voltage generator>
1) Insert the high voltage
generator straight into the
evaporator voltage generator
from the evaporator.
2) Secure it using the fixing
screws. (2 pcs)
3) Connect the connectors of the
high-voltage generator
4) Attach the air ionizer to the back
body.
– 95 –
Page 96
FILE NO. SVM-10050
No. Part name
Electric parts
box assembly
Procedures Remarks
1) Remove screw of earth lead attached to the
end plate of the evaporator.
2) Remove the lead wire cover, and remove
connector for the fan motor and connector for the louver motor from the electric
parts box assembly.
3) Pull out TC sensor from sensor holder of the
evaporator.
4) Disengage the display unit by simply pushing
at the top of the display unit.
) Remove the fixing screw that secures the
5
conduit mount, electric parts box assembly,
LED assembly and remove the assembly.
Electric art
p
box cover's screw
<How to assemble the electric parts box>
1) Hook the top part of the electric parts box
assembly onto the claws on the back body,
and secure it using the fixing screw.
Now attach the display unit. Connect the
connectors for the fan motor and louver motor.
2) Secure the grounding wire using the fixing
screw. Insert the TC sensor into the sensor
holder.
* Be absolutely sure to loop the grounding
wire and TC sensor leads once at the
bottom.
TC sensorEarth Screw
Fan motor
connector
Louver
motor
connector
Fixing screw
Fixing screw
LED assembly
Loof the qrunding wire
– 96 –
Page 97
FILE NO. SVM-10050
No. Part name
Horizontal louver
Evaporator
(Heat exchanger)
Procedures
Remarks
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. (Figure 1)
3) Remove two fixing screws at the left side of the end plate of the heat exchanger.
Pipe hoolder
Screw
(Figure 1)
Screw
(Figure 2)
– 97 –
(Figure 3)
Page 98
No. Part name Procedures
n
Evaporator
(Heat exchanger)
4) Remove three fixing screw at the right
side of the heat exchanger, and separate
the heat exchanger from the back body.
(Figure 4, 5)
FILE NO. SVM-10050
One screw
(Figure 4)
One screw
(Figure 5)
o
Bearing
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.
Two screws
Two
screws
Bearing
Bearing base
Bearing base
– 98 –
Bearing
Page 99
FILE NO. SVM-10050
No. Part name
Fan motor
p
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.
Remarks
Set screw
5) Pull the fan motor outward.
Two screws on
motor cover
Two screws on
motor band
– 99 –
Page 100
FILE NO. SVM-10050
No. Part name
Cross flow fan
q
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
– 100 –
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