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
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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
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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
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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
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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
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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