Mitsubishi SUZ-A09VR Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
No.OC304
REVISED EDITION-A
R410A
Outdoor unit
[model names] [Service Ref.]
SUZ-A09VR SUZ-A09VR.TH
SUZ-A12VR SUZ-A12VR.TH
SUZ-A18VR SUZ-A18VR.TH
SUZ-A24VR SUZ-A24VR.TH
CONTENTS
1. COMBINATION OF INDOOR AND OUTDOOR UNITS ······2
2. TECHNICAL CHANGES ···································3
3. PART NAMES AND FUNCTIONS······················6
4. SPECIFICATION·················································7
5. NOISE CRITERIA CURVES·····························11
6. OUTLINES AND DIMENSIONS ·······················12
7. WIRING DIAGRAM ··········································14
8. REFRIGERANT SYSTEM DIAGRAM··············16
9. PERFORMANCE CURVES······························19
10. ACTUATOR CONTROL····································41
11. SERVICE FUNCTIONS·····································42
12. TROUBLESHOOTING······································42
13. DISASSEMBLY INSTRUCTIONS·····················71
14. PARTS LIST······················································79
Indication of
model name
NOTE:
This service manual describes technical data of the
outdoor units.
•As for indoor units SLZ-A09AR.TH, SLZ-A12AR.TH,
SLZ-A18AR.TH, SEZ-A12AR.TH, SEZ-A18AR.TH,
SEZ-A24AR.TH and SEZ-A09CR.W, refer to the service
manual OC302 and OC303.
HFC
utilized
R410A
Revision :
• SUZ-A18VR.TH and SUZ-A24VR.TH are added in
REVISED EDITION-A.
• Please void OC304.
SUZ-A09VR.TH SUZ-A12VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 1

2
1COMBINATION OF INDOOR AND OUTDOOR UNITS
Heat pump type
Outdoor unit
SUZ-
SLZ-A09AR.TH
SLZ-A12AR.TH
SLZ-A18AR.TH
SEZ-A09CR.W
SEZ-A12AR.TH
SEZ-A18AR.TH
SEZ-A24AR.TH
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
OC302
—
OC303
Indoor unit
Service
Manual No.
Service Ref.
Heat pump without electric heater
A12VR.THA09VR.TH A24VR.THA18VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 2

Refrigerating
oil
Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-51.4
1.557
64
Non combustible
0
1730
From liquid phase in cylinder
Possible
Incompatible oil
Non
Non
Previous refrigerant
R22
R22 (100%)
Single refrigerant
Included
A1
86.5
-40.8
0.94
44.4
Non combustible
0.055
1700
Gas phase
Possible
Compatible oil
Light yellow
Non
Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (:)
Steam pressure [25:](Mpa)
Saturated steam density [25:](Kg/K)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1:Ozone Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter : based on CO2
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
• This room air conditioner adopts an HFC refrigerant (R410A) which never destroys the ozone layer.
• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 conditioners.
1As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/
materials are required. Refer to the table below.
2Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and
installation, since it is more susceptible to contaminations than R22.
3For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant
piping.)
4Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.
NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
New Specification Current Specification
The incompatible refrigerating oil easily separates from
refrigerant and is in the upper layer inside the suction muffler.
Raising position of the oil back hole enables to back the
refrigerating oil of the upper layer to flow back to the
compressor.
Since refrigerant and refrigerating oil are compatible each,
refrigerating oil backs to the compressor through the lower
position oil back hole.
Compressor
Suction muffler
Oil back hole
Refrigerating oil
Refrigerant
Compressor
Suction muffler
Oil back hole
Refrigerating oil /Refrigerant
Compressor
3
TECHNICAL CHANGES
2
OC304A --1qxp 04.6.29 8:33 AM Page 3

-30 -20 -10 0 10 20 30 40 50 60
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
(MPa [Gauge])
R410A
R22
Conversion chart of refrigerant temperature and pressure
Saturated liquid pressure
(:)
NOTE : The unit of pressure has been changed to MPa on the
international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
R410A tools Can R22 tools be used?
Gas leak detector
R410A has high pressures beyond the measurement range of existing
gauges. Port diameters have been changed to prevent any other refrigerant
from being charged into the unit.
Hose material and cap size have been changed to improve the pressure
resistance.
Dedicated for HFC refrigerant.
6.35 mm and 9.52 mm
Description
Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
Provided for flaring work (to be used with R22 flare tool).
Provided to prevent the back flow of oil. This adapter enables you to use
vacuum pumps.
It is difficult to measure R410Awith a charging cylinder because the
refrigerant bubbles due to high pressure and high-speed vaporization
No
No
No
Yes
Yes
New
New
New
Gauge manifold
Charge hose
Torque wrench
Flare tool
Flare gauge
Vacuum pump
adapter
Electronic scale for
refrigerant charging
No : Not Substitutable for R410A Yes : Substitutable for R410A
No 12.7 mm
1. Tools dedicated for the air conditioner with R410A refrigerant
The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being
charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.
2. Refrigerant piping
1Specifications
Use the refrigerant pipes that meet the following specifications.
• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less
than 0.8mm, as the pressure resistance is insufficient.
Wall
thickness
Outside diameter
Pipe mm
For liquid
For gas
6.35
9.52
12.7
0.8 mm
0.8 mm
0.8 mm
Heat resisting foam plastic
Specific gravity 0.045 Thickness 8 mm
Insulation material
4
OC304A --1qxp 04.6.29 8:33 AM Page 4

Electronic scale for refrigerant charging
Outdoor unit
Refrigerant gas
cylinder
operating valve
Refrigerant gas cylinder
for R410A with siphon
Refrigerant (liquid)
Service port
Gauge manifold
valve (for R410A)
Union
Liquid pipe
Gas pipe
Stop valve
Indoor unit
Charge hose (for R410A)
R410A
Pipe diameter
mm
6.35
9.52
12.7
17
22
26
Dimension of flare nut
R22
17
22
24
2Flaring work and flare nut
Flaring work for R410A pipe differs from that for R22 pipe.
For details of flaring work, refer to Installation manual “FLARING WORK”.
3. Refrigerant oil
Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.
4. Air purge
• Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant
circuit.
• Use the vacuum pump for air purging for the purpose of environmental protection.
5. Additional charge
For additional charging, charge the refrigerant from liquid phase of the gas cylinder.
If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the
outdoor unit. In this case, ability of the refrigerating cycle decreases or normal operation can be impossible. However,
charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.
5
OC304A --1qxp 04.6.29 8:33 AM Page 5

6
3PART NAMES AND FUNCTIONS
OUTDOOR UNIT
Air inlet
Air outlet
Drain outlet
Piping
Drain hose
(back and side)
ACCESSORIES
1Drain socket 1
SUZ-A09VR.TH
SUZ-A12VR.TH
SUZ-A09VR.TH
SUZ-A12VR.TH
OUTDOOR UNIT Air inlet
Piping
Air outlet
(back and side)
Drain hose
Drain outlet
ACCESSORIES
1
2
Drain socket
Drain cap [33 1
2
SUZ-A18VR.TH
SUZ-A24VR.TH
SUZ-A18VR.TH
SUZ-A24VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 6

7
SPECIFICATION
4
Function
Power supply
Outdoor Service Ref.
Capacity Rated frequency(Min.~Max.)
Dehumidification
Air flow(High/Loww)
Starting current ✽1
Compressor motor current ✽1
Fan motor current
Model
Output
Winding
resistance(at 20:)
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity(R410A)
Refrigerating oil (Model)
Thermistor RT61 (at 0:)
Thermistor RT62 (at 100:)
Thermistor RT64 (at 50:)
Thermistor RT65 (at 25:)
Thermistor RT61 (at 100:)
Thermistor RT62 (at 25:)
Thermistor RT65 (at 50:)
Thermistor RT68 (at 25:)
kW
r/h
K/h
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
k"
k"
k"
k"
k"
k"
k"
k"
Single phase
230V,50Hz
1900
4.20
0.24
KNB073FBVH
550
U-V 1.53 U-W 1.53
V-W 1.53
RA6V21-AA
WHT-BLK 347
BLK-RED 281
800o550o285
33
46
825
1
0.80
320 (NEO22)
32.6
13.4
17
10
—
—
—
—
Cooling
2.5(0.9-3.2)
1.4
3.28
3.29
Heating
3.0(0.9-4.3)
—
3.78
3.45
SUZ-A09VR.TH
Indoor Service Ref.
SLZ-A09AR.TH Indoor Service Ref. SLZ-A12AR.TH
Compressor
Fan motor
Special remarks
Coefficient of performance (C.O.P)
Capacity
Electrical data
SUZ-A12VR.TH
Single phase
230V,50Hz
1900
4.90
0.24
KNB092FAAH
650
U-V 0.49 U-W 0.49
V-W 0.49
RA6V21-AA
WHT-BLK 347
BLK-RED 281
800o550o285
34
825
1
0.90
320 (NEO22)
32.6
13.4
17
10
—
—
—
—
Cooling
3.2(1.0-3.6)
1.8
4.43
3.02
47
Heating
3.8(0.9-4.8)
—
4.43
3.55
48
Indoor Service Ref.
SLZ-A18AR.TH
SUZ-A18VR.TH
Single phase
230V,50Hz
7.40
0.30
SNB130FLDH
850
U-V 0.45 U-W 0.45
V-W 0.45
PM8H60-UB
BLK-WHT 15.2
840o850o330
53
2
1.80
450 (NEO22)
—
—
—
—
13.4
10.0
17.0
10.0
Cooling
4.6(1.1-5.2)
2.3
2,940/1,320w
6.86
2.82
WHT-RED 15.2
53/50w
800/400w
Heating
5.0(0.9-6.5)
—
2,940/2,210w
6.46
3.23
RED-BLK 15.2
55/53w
800/620w
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor D.B. 27:W.B. 19:
Outdoor D.B. 35:W.B. 24:
Heating : Indoor D.B. 20:W.B. 15:
Outdoor D.B. 7:W.B. 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
SLZ-A•AR.TH / SUZ-A•VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 7

8
SUZ-A09VR.TH
Indoor Service Ref. SEZ-A09CR.W
Function
Power supply
Capacity Rated frequency(Min.~Max.)
Dehumidification
Air flow
Starting current ✽1
Compressor motor current ✽1
Fan motor current
Model
Output
Winding
resistance(at 20:)
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity(R410A)
Refrigerating oil (Model)
Thermistor RT61(at 0:)
Thermistor RT62(at 100:)
Thermistor RT64(at 50:)
Thermistor RT65(at 25:)
kW
r/h
K/h
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
k"
k"
k"
k"
Compressor
Fan motor
Special remarks
Coefficient of performance(C.O.P)
Capacity
Electrical data
Outdoor Service Ref.
Single phase
230V,50Hz
1900
4.30
0.24
KNB073FBVH
550
U-V 1.53 U-W 1.53
V-W 1.53
RA6V21-AA
WHT-BLK 347
BLK-RED 281
800o550o285
33
46
825
1
0.80
320 (NEO22)
32.6
13.4
17
10
Cooling
2.4 (1.0-3.2)
1.4
3.08
3.24
Heating
3.0 (0.9-4.2)
—
3.78
3.41
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor D.B. 27:W.B. 19:
Outdoor D.B. 35:W.B. 24:
Heating : Indoor D.B. 20:W.B. 15:
Outdoor D.B. 7:W.B. 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
SEZ-A•CR.W / SUZ-A•VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 8

9
Function
Power supply
Outdoor Service Ref.
Capacity Rated frequency(Min.~Max.)
Dehumidification
Air flow(High/Loww)
Starting current ✽1
Compressor motor current ✽1
Fan motor current
Model
Output
Winding
resistance(at 20:)
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level(High/Loww)
Fan speed(High/Loww)
Fan speed regulator
Refrigerant filling
capacity(R410A)
Refrigerating oil (Model)
Thermistor RT61 (at 0:)
Thermistor RT62 (at 100:)
Thermistor RT64 (at 50:)
Thermistor RT65 (at 25:)
Thermistor RT61 (at 100:)
Thermistor RT62 (at 25:)
Thermistor RT65 (at 50:)
Thermistor RT68 (at 25:)
kW
r/h
K/h
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
k"
k"
k"
k"
k"
k"
k"
k"
SUZ-A12VR.TH
Indoor Service Ref.
SEZ-A12AR.TH Indoor Service Ref. SEZ-A18AR.TH
Compressor
Fan motor
Special remarks
Coefficient of performance(C.O.P)
Capacity
Electrical data
SUZ-A18VR.TH
Single phase
230V,50Hz
8.50
0.30
SNB130FLDH
850
U-V 0.45 U-W 0.45
V-W 0.45
PM8H60-UB
BLK-WHT 15.2
840o850o330
53
2
1.80
450 (NEO22)
—
—
—
—
13.4
10.0
17.0
10.0
Cooling
5.0(1.1-5.6)
2.5
2,940/1,640w
7.43
2.81
WHT-RED 15.2
53/51w
800/480w
Heating
5.9(1.1-7.2)
—
2,940/2,210w
7.93
3.21
RED-BLK 15.2
55/53w
800/620w
Indoor Service Ref.
SEZ-A24AR.TH
SUZ-A24VR.TH
Single phase
230V,50Hz
10.40
0.30
SNB130FLDH
850
U-V 0.45 U-W 0.45
V-W 0.45
PM8H60-UB
BLK-WHT 15.2
840o850o330
53
2
1.80
450 (NEO22)
—
—
—
—
13.4
10.0
17.0
10.0
Cooling
5.5(1.1-6.3)
3.3
2,940/1,640w
8.36
2.81
WHT-RED 15.2
53/51w
800/480w
Heating
6.9(0.9-8.0)
—
2,940/2,210w
9.76
2.82
RED-BLK 15.2
55/53w
800/620w
Single phase
230V,50Hz
1900
5.00
0.24
KNB092FAAH
650
U-V 0.49 U-W 0.49
V-W 0.49
RA6V21-AA
WHT-BLK 347
BLK-RED 281
800o550o285
34
47
825
1
0.90
320 (NEO22)
32.6
13.4
17
10
—
—
—
—
Cooling
3.4 (1.0-3.8)
1.9
4.55
3.12
Heating
3.9 (0.9-5.0)
—
4.45
3.55
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor D.B. 27:W.B. 19:
Outdoor D.B. 35:W.B. 24:
Heating : Indoor D.B. 20:W.B. 15:
Outdoor D.B. 7:W.B. 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
SEZ-A•AR.TH / SUZ-A•VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 9

10
Model
Item
Current transformer
Current transformer
Smoothing capacitor
Outdoor fan capacitor
Diode module
Fuse
Fuse
Power transistor module
Expansion valve coil
Reactor
Current-detecting resistor
Current-detecting resistor
Current-limiting resistor
Solid state relay
Terminal block
Relay
Relay
R.V. coil
Outdoor fan motor thermal fuse
SUZ-A09VR.TH SUZ-A12VR.TH
(CT)
(CT761, CT781)
(
C62A, C62B, C61B )
(C65)
(DB61, DB65)
(F61)
(F71, F801)
(IPM)
(LEV)
(L61)
(R61)
(R831)
(
R64A, R64B )
(SR61)
(TB)
(X63)
(X64)
(21S4)
ETQ19Z53AY
ETQ19Z71AY
680+ 420V
1.8+ 440V
D25XB60
250V 20A
250V 3.15A
PS21244A
CAD-MD12ME 12VDC
10A 23.0mH
25m"5W
5.1"10W
G3MB
3P
G5N-1a/G5NB-1a
G4A-1A-PS
LD30013
Open 152:
45m"5W 50m"5W (2 elements)
Specifications and rating conditions of main electric parts
Service Ref.
Item
Smoothing capacitor
Current transformer
Current transformer
Fuse
Fuse
Fet array
Power transistor module
Reactor
Expansion valve
Power factor controller
Resistor
Resistor
Resistor
Solenoid coil relay
Terminal block
Terminal block
Relay
R.V. coil
SUZ-A18VR.TH
(CB1,2,3)
(CT1,2)
(CT61)
(F801, F912)
(F911)
(HC932)
(IPM)
(L)
(LEV)
(PFC)
(R64)
(R934A,B)
(RS1~4)
(SSR61)
(TB1)
(TB2)
(X64)
(21S4)
SUZ-A24VR.TH
560+450V
ETQ19Z68AY
ETQ19Z53AY
250V 3.15A
250V 1A
SLA5075
PS21244-A
340µH 20A
CAM-30YGME 12VDC
PS51259-A
10"20W
1.1"2W 2%
0.04"7W
TLP3506
3P
2P
G4A
LD30013
SUZ-A09VR.TH
SUZ-A12VR.TH
SUZ-A18VR.TH
SUZ-A24VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 10

11
NOISE CRITERIA CURVES
5
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION SPL(dB) LINE
High
SPEED
HEATING
46
46
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
SUZ-A09VR.TH
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION SPL(dB) LINE
High
FAN SPEED
HEATING
47
48
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
OUTDOORUNIT
MICROPHONE
1m
SUZ-A12VR.TH
COOLING
FUNCTION SPL(dB(A)) LINE
High
SPEED
HEATING
53
55
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
SUZ-A18VR.TH
SUZ-A24VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 11

12
6OUTLINES AND DIMENSIONS
10
69
800
302.5
500 Bolt pitch for installation
150
22.3
Handle
550
280
164.5
99.5
170.5
23 Service panel
Service port
285
344.5
44
400
Air in
Air out
Air in
17.5
Bolt pitch for
installation
304~325
40
Liquid refrigerant pipe joint
Refrigerant pipe (flared) [6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) [9.52
43-
35-
2 holes 10o21
Drain hole [42
REQUIRED SPACE Basically open 100mm or more
without any obstruction in front
and on both sides of the unit.
350mm or more
200mm or more
100mm or more
100mm or more
Open two sides of left,
right, or rear side.
Unit: mm
OUTDOOR UNIT
SUZ-A09VR.TH
SUZ-A12VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 12

13
Unit: mm
30-
35-
155
90
198
40
515
299
66
34
51
330
360
850
430
500 80
121
840
Open as a rule
500mm or more if
the front and both
sides are open
100mm or more
200mm or more if
there are obstacles
to both sides
Open as a rule
500mm or more if the back,
both sides and top are open 350mm or more
100mm or more
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [12.7·····(SUZ-A18VR.TH)
[15.88···(SUZ-A24VR.TH)
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [6.35
REQUIRED SPACE
OUTDOOR UNIT
SUZ-A18VR.TH
SUZ-A24VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 13

14
7WIRING DIAGRAM
OUTDOOR UNIT
WHT
R64A
WHT BLU
BLU
RED
N
TO INDOOR UNIT CONNECTING
230V~
12V
★
2 3
GRN/YLW
TB
R64B
R831
3
CN771 CN800
CN642
421
INVERTER P.C. BOARD
CN641
213
CN601
3
CN643
2
112
7
POWER P.C. BOARD
RT61 RT62
RT64
RT65
GRN F71
CT
LDE
NR61
TR821
DB65
6
LEV
C N
7 2 4
IC801
SR61C65 1
2 1
CN721
X63
21S4
MF
2
1 2 3
BLK
TAB62
3
X64
L62
TAB61
F61
DSA
L63
T801
BLK
BLU
C62A C62B
BLU
LD70
DB61
LD69
4
TAB63
BLK
L61
P
W
V U
N
R61
2
CT761
CT781
IPM CN61
U
WMC
WHT
BLK
V
RED
RED BLK WHT 1
3
LD-U LD-W
LD-V
C61B F801
C N
7 2 6
C N
7 2 5
+++
SYMBOL CT,CT761,CT781 C62A,C62B,C61B C65 DB61,DB65 DSA F61 F71,F801 IC801 IPM
SYMBOL LEV L61 L62,L63 MC MF NR61 RT61 RT62 RT64
SYMBOL RT65 R61,R831 R64A,R64B SR61 TB TR821 T801 X63,X64 21S4
NAME
CURRENT TRANSFORMER SMOOTHING CAPACITOR FAN MOTOR CAPACITOR DIODE MODULE SURGE ABSORBER FUSE (20A) FUSE (3.15A) INTELLIGENT POWER DEVICE POWER TRANSISTOR MODULE
NAME
EXPANSION VALVE COIL REACTOR CMC COIL COMPRESSOR FAN MOTOR VARISTOR DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR
NAME
AMBIENT TEMPERATURE THERMISTOR CURRENT-DETECTING RESISTOR CURRENT-LIMITING RESISTOR SOLID STATE RELAY TERMINAL BLOCK SWITCHING POWER TRANSISTOR TRANSFORMER RELAY REVERSING VALVE COIL
NOTE: 1. About the indoor side electric wiring
refer to the indoor unit electric wiring diagram for servicing.
2. Use copper conductors only.
(For field wiring)
3. Symbols below indicate.
: Terminal block, : Connector
★The 12V DC is NOT always against the ground.
Terminal 3 has 12V DC against terminal N. However, between Terminal 3 and N, these terminals are NOT electrically insulated by the transformer or other device.
SUZ-A09VR.TH
SUZ-A12VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 14

15
OUTDOOR UNIT
PFC
GRN
LD9 POWER
BOARD RT65
21
CN3
REVERSING VALVE SOLENOID COIL
RS1~4
CT1,2
RESISTOR 21S4
RED
WHT
RS2 RS1
R64
RS3 RS4
F801
CN901
NR63
ELECTRONIC CONTROL P.C.BOARD
CB1
CB2
CB3
HC932
IPM
NF
NOISE FILTER P.C.BOARD
BLK BLK BLK
BLK WHT RED YLW BLU ORN PNK GRY
BLU RED
GRN
GRN
BLU
BLU
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK RED
BRN
BLU
TB2 X64 RELAY
TERMINAL BLOCK
NOTES 2. Use copper conductors only(for field wiring).
3. Symbols below indicate. 1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing. :Terminal block :Connector
LCT2
CT1
SSR61
U
6
CN7954123 78
CN661
W
CN4
TB2
3
TO INDOOR UNIT CONNECTING 12V
1
CN601
3
N
1 567
CN702
5321 CN781 13
CN701
12 12
CN931
LD1LD2
T801 R934A
R934B
CN801
231 34512
MF
CN932
4X64
5123
LDE2
13
CT61
TAB1
F912
F911
LDE1
CN912
21S4
POWER SUPPLY ~/N 230V 50Hz
TAB2
GRN/YLW
NPE L
TB1
CIRCUIT BREAKER 4
1RED
YLW
3 2
RED S
R
21
CN903
21
CN902
21
CN5
6543 1
CN2 27
TAB4 YLW VMC
W
U
V
WHT
RT62 RT61 RT68 LEV
SMOOTHING CAPACITOR
CB1~3 CT61 FUSE(250V 3.15A)F801 FUSE(250V 1A)F911 FUSE(250V 3.15A)F912 FET ARRAY HC932
POWER TRANSISTOR MODULEIPM REACTOR
L
CURRENT TRANSFORMER CURRENT TRANSFORMER VARISTOR
POWER FACTOR CONTROLLER RESISTORR64
PFC NR63 TRANSFORMER
COMPRESSOR FAN MOTOR(INNER FUSE)MF
MC
TB1 T801
SSR61
RESISTOR DISCHARGE TEMP.THERMISTORRT61
R934A,B
DEFROST TEMP.THERMISTOR
FIN TEMP.THERMISTORRT65
RT62
SOLENOID COIL RELAY TERMINAL BLOCK OUTDOOR HEAT EXCHANGER
RT68 TEMPERATURE THERMISTOR
EXPANSION VALVELEV
NOISE FILTERNF
SYMBOL
NAME
SYMBOL
NAME
SYMBOL
NAME
SUZ-A18VR.TH
SUZ-A24VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 15

16
8REFRIGERANT SYSTEM DIAGRAM
OUTDOOR UNIT
Unit:mm
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperatuer
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
Muffler
4-way valve
Refrigerant flow in heating
Refrigerant pipe [9.52
(with heat insulator)
Refrigerant pipe
[6.35
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Ambient
temperature
thermistor
RT65
Strainer
#100
Capillary tube
[3.0✕[2.0✕200
Expansion
valve
Muffler
Muffler
SUZ-A09VR.TH
SUZ-A12VR.TH
Unit:mm
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT62
Discharge
temperature
thermistor
RT61
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
[3.6✕[2.4✕50 Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe [12.7 (SUZ-A18VR.TH)
(with heat insulator) [15.88 (SUZ-A24VR.TH)
Refrigerant pipe [6.35
(with heat insulator)
LEV R.V. coil
heating ON
cooling OFF
Muffler
#100
Strainer
#100
Receiver
Outdoor heat
exchanger
temperature
thermistor
RT68
Strainer
#100
OUTDOOR UNIT
SUZ-A18VR.TH
SUZ-A24VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 16

17
ADDITIONAL REFRIGERANT CHARGE (R410A:g)
Outdoor unit
precharged
800
900
14m
270
270
7m
0
0
6m
0
0
5m
0
0
11m
180
180
Models Refrigerant piping length (one way)
Calculation : Xg=30g/mo(Refrigerant piping length(m) - 5)
8m
90
90
9m
120
120
10m
150
150
12m
210
210
13m
240
240
15m
300
300
20m
450
450
SUZ-A09VR.TH
SUZ-A12VR.TH
Refrigerant Piping
Max. length
A
wHeight difference should be within 12m regardless of which unit, indoor or outdoor position is high.
wMax. Height
difference 12m
Indoor
unit (SLZ/SEZ)
Outdoor unit
MAX. HEIGHT DIFFERENCE
MAX. REFRIGERANT PIPING LENGTH
Refrigerant piping
Max. length : m
A
20
Gas
9.52
Liquid
6.35
Piping size O.D : mm
Models
SUZ-A09VR.TH
SUZ-A12VR.TH
SUZ-A09VR.TH
SUZ-A12VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 17

18
Refrigerant Piping
Max. length
A
wHeight difference should be within 15m regardless of which unit, indoor or outdoor position is high.
wMax. Height
difference 15m
Indoor
unit
Outdoor unit
(SLZ/SEZ)
MAX. HEIGHT DIFFERENCE
MAX. REFRIGERANT PIPING LENGTH
Refrigerant piping
Max. length : m
A
30
Indoor unit
Gas 0.43
Liquid 0.5
Gas
12.7
15.88
Liquid
6.35
Outdoor unit
Gas 0
Liquid 0
SUZ-A18VR.TH
SUZ-A24VR.TH
Model Piping size O.D : mm Length of connecting pipe : m
Refrigerant piping length (one way)
Outdoor unit
precharged 15m
160
160
20m
260
260
25m
360
360
30m
460
460
7m
0
0
10m
60
60
Model
SUZ-A18VR.TH
SUZ-A24VR.TH
1,800
1,800
ADDITIONAL REFRIGERANT CHARGE(R410A : g)
Calculation : Xg=20g/m ✕ (Refrigerant piping length (m)–7)
SUZ-A18VR.TH
SUZ-A24VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 18

19
PERFORMANCE CURVES
9
The standard data contained in these specifications apply only to the operation of the air conditioner under normal condition.
Operating conditions vary according to the areas where these units are installed. The following information has been provided
to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
(1) GUARANTEED VOLTAGE
Rated voltage : ±10% (207~253V), 50Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
COOLING
(1) Indoor intake air wet-bulb temperature : W.B. ˚C
(2) Indoor outlet air wet-bulb temperature : W.B. ˚C
(3) Outdoor intake air dry-bulb temperature : D.B. ˚C
(4) Total input : W
Indoor air wet/dry-bulb temperature difference on the side of the chart on page shows the difference between the
indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.
How to measure the indoor air wet-bulb/dry-bulb temperature difference
1. Attach at least 2 sets of wet-and-dry-bulb thermometers to the indoor air inlet as shown in the figure, and at least 2 sets of
wet-and-dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed
is high.
2. Attach at least 2 sets of wet-and-dry-bulb thermometers to the outdoor air inlet.
Cover the thermometers to prevent direct rays of the sun.
3. Check that the air filter is cleaned.
4. Open windows and doors of the room.
5. Press the EMERGENCY OPERATION switch once to start the COOL(HEAT) MODE.
6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
7. 10 minutes later, measure temperature again and check that the temperature does not change.
Wet-and dry-bulb
thermometers
BACK VIEW
INDOOR UNIT OUTDOOR UNIT
HEATING
(1) Indoor intake air dry-bulb temperature : D.B. ˚C
(2) Indoor outlet air dry-bulb temperature : D.B. ˚C
(3) Outdoor intake air wet-bulb temperature : W.B. ˚C
(4) Total input : W
Indoor air Wet-bulb temperature
difference (degree)
Indoor intake air Wet-bulb temperature (:)
Outdoor intake air Dry-bulb temperature (:)
Indoor intake air Wet-bulb temperature (:)
Outdoor intake air Dry-bulb temperature (:)
SUZ-A09VR.TH
6.6
6.1
5.6
5.2
4.7
4.2
8.0
7.5
6.9
6.3
5.7
5.2
Rated frequency 57Hz
SUZ-A12VR.TH
Rated frequency 67Hz
10.8
10.0
9.2
8.5
7.7
6.9
SUZ-A18VR.TH
Rated frequency 75Hz
●SLZ-A09AR.TH / SUZ-A09VR.TH
●SLZ-A12AR.TH / SUZ-A12VR.TH
●SLZ-A18AR.TH / SUZ-A18VR.TH
OC304A --1qxp 04.6.29 8:33 AM Page 19

20
OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
20.4
18.9
17.3
15.7
14.2
12.6
11.0
9.4
23.6
21.8
20.0
18.2
16.3
14.5
12.7
10.9
Indoor air Dry-bulb temperature
difference (degree)
Indoor intake air Dry-bulb temperature (:)
Outdoor intake air Wet-bulb temperature (:) Outdoor intake air Wet-bulb temperature (:)
Indoor intake air Dry-bulb temperature (:)
SUZ-A09VR.TH
Rated frequency 75Hz
SUZ-A12VR.TH
Rated frequency 76Hz
28.2
26.0
23.9
21.7
19.5
17.4
15.2
13.0
SUZ-A18VR.TH
Rated frequency 65Hz
NOTE:The above curves are for the heating operation without any frost.
0 50 100 150(Hz)
0.0
0.5
1.0
1.5 Correction of Cooling capacity
Capacity correction factors
The operational frequency of compressor
0 50 100 150(Hz)
0.0
0.5
1.0
1.5 Correction of Cooling capacity
Capacity correction factors
The operational frequency of compressor
Correction of Cooling total input
Input correction factors
The operational frequency of compressor
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0
1.5
1.0
0.5
0.00 50 100 150(Hz)
Correction of Heating capacity
Capacity correction factors
The operational frequency of compressor
2.0
1.5
1.0
0.5
0.0
Correction of Heating total input
Input correction factors
The operational frequency of compressor
0 50 100 150(Hz)
2.0
1.5
1.0
0.5
0.00 50 100 150(Hz)
Correction of Heating capacity
Capacity correction factors
The operational frequency of compressor
Correction of Heating total input
The operational frequency of compressor
0 50 100 150(Hz)
2.0
1.5
1.0
0.5
0.0
Input correction factors
The operational frequency of compressor
Correction of Cooling total input
0 50 100 150(Hz)
2.0
1.5
1.0
0.5
0.0
Input correction factors
0 50 100 150(Hz)
0.0
0.5
1.0
1.5 Correction of Cooling capacity
Capacity correction factors
The operational frequency of compressor
Correction of Cooling total input
Input correction factors
The operational frequency of compressor
0 50 100 150(Hz)
0.0
0.5
1.0
1.5 2.5
2.0
1.5
1.0
0.5
0.0
Correction of Heating total input
Input correction factors
The operational frequency of compressor
0 50 100 150(Hz)
2.0
1.5
1.0
0.5
0.00 50 100 150(Hz)
Correction of Heating capacity
Capacity correction factors
The operational frequency of compressor
SUZ-A09VR.TH
SUZ-A12VR.TH SUZ-A12VR.TH SUZ-A12VR.TH SUZ-A12VR.TH
SUZ-A09VR.TH SUZ-A09VR.TH SUZ-A09VR.TH
SUZ-A18VR.TH SUZ-A18VR.TH SUZ-A18VR.TH SUZ-A18VR.TH
<How to operate fixed-frequency operation (Test run operation)>
1. Press the EMERGENCY OPERATION switch to COOL or HEAT mode.
2. Test run operation starts and continue to operate for 30 minutes.
3. Compressor starts at rated frequency in COOL mode or 58Hz in HEAT mode.
4. Indoor fan operates at High speed.
5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts.
6. To cancel test run operation (EMERGENCY OPERATION), press the EMERGENCY OPERATION switch or any button on
remote controller.
NOTE : The unit of pressure has been changed to MPa on the international system of units (SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
OC304A --1qxp 04.6.29 8:33 AM Page 20