Mitsubishi Electric SUZ-KA25VA Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
No.OC322
R410A
Outdoor unit
[model names] [Service Ref.]
SUZ-KA25VA SUZ-KA25VA.TH
SUZ-KA35VA SUZ-KA35VA.TH
SUZ-KA25VAH SUZ-KA25VAH.TH
SUZ-KA35VAH SUZ-KA35VAH.TH
SUZ-KA50VA SUZ-KA50VA.TH
SUZ-KA50VA1.TH
SUZ-KA60VA SUZ-KA60VA.TH
SUZ-KA60VA1.TH
SUZ-KA71VA SUZ-KA71VA.TH
SUZ-KA71VA1.TH
CONTENTS
1. COMBINATION OF INDOOR AND OUTDOOR UNITS ······2
2. TECHNICAL CHANGES ···································2
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··············18
9. PERFORMANCE CURVES······························22
10. ACTUATOR CONTROL····································50
11. SERVICE FUNCTIONS·····································51
12. TROUBLESHOOTING······································51
13. DISASSEMBLY INSTRUCTIONS·····················84
14. PARTS LIST······················································91
15. RoHS PARTS LIST···········································97
Indication of
model name
NOTE:
This service manual describes technical data of the
outdoor units.
•As for indoor units SLZ-KA25/35/50VA(L).TH and SEZ-
KA35/50/60/71VA.TH, refer to the service manual
OC320 and OC321.
HFC
utilized
R410A
SUZ-KA25VA(H).TH SUZ-KA35VA(H).TH
March 2007
REVISED EDITION-C
Revision:
• SUZ-KA50/60/71VA1.TH
are added in REVISED
EDITION-C.
• Some descriptions have
been modified.
• Please void OC322
REVISED EDITION-B.
Note:
• RoHS compliant products
have <G> mark on the
spec name plate.
• For servicing of RoHS
compliant products, refer
to the RoHS Parts List.
OC322C--1qxp 07.3.12 3:43 PM Page 1

2
1COMBINATION OF INDOOR AND OUTDOOR UNITS
Heat pump type
Outdoor unit
SUZ-
SLZ-KA25VA(L).TH
SLZ-KA35VA(L).TH
SLZ-KA50VA(L).TH
SEZ-KC25VA.W
SEZ-KA35VA.TH
SEZ-KA50VA.TH
SEZ-KA60VA.TH
SEZ-KA71VA.TH
MFZ-KA25VA-E1
MFZ-KA35VA-E1
MFZ-KA50VA-E1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
OC320
—
OC321
OB409
Indoor unit
Service
Manual No.
Service Ref.
Heat pump without electric heater
KA35VA(H).THKA25VA(H).TH KA60VA(1).TH KA71VA(1).THKA50VA(1).TH
2TECHNICAL CHANGES
(NOTE)
Only the combination data of SLZ type and SEZ type have been described in this manual.
Please refer to the service manual of indoor unit or the technical data book for other combination.
Revision B:
· Compressor has been changed. (SUZ-KA50/60VA)
Previous
New
Model
SNB130FLDH
SNB130FLDH1
PARTS LIST number
E02 851 900
E02 939 900
RoHS PARTS LIST number
E12 851 900
E12 939 900
SUZ-KA50VA.TH ➔SUZ-KA50VA1.TH
SUZ-KA60VA.TH ➔SUZ-KA60VA1.TH
SUZ-KA71VA.TH ➔ SUZ-KA71VA1.TH
1.OUTDDOOR ELECTRONIC CONTROL P.C. BOARD has been changed.
2.Max. height difference 15m
➔ 30m (Except when combined with MFZ).
3.Garanteed operating range
Lower limit (Cooling/Outdoor) -10:DB
➔ -15:DB (Except when combined with MFZ)
SUZ-KA25VA.TH
SUZ-KA35VA.TH
Lower limit (Heating/Outdoor) -10:DB ➔ -15:DB.
SUZ-KA35VAH.TH
Defrost finish temperature has been changed (Refer to 11).
OC322C--1qxp 07.3.12 3:43 PM Page 2

Refrigerant
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 Depletion Potential : based on CFC-11
w2 :Global Warming Potential : based on CO2
3
SUZ-A09VR.TH ➔SUZ-KA25VA.TH
SUZ-A12VR.TH ➔SUZ-KA35VA.TH
1.Indication of capacity has been changed.(BTU base➔kW base)
2.Control method between indoor and outdoor unit has been changed.
3.Power supply method has been changed (change to supply from outdoor unit).
4. Terminal block for power supply has been added.
5.Power P.C.board has been changed.
6.Inverter P.C. board has been changed.
7.Refrigerant circuit has been changed.
•
Compressor has been changed.(KNB073FBVH➔KNB073FDVH:SUZ-KA25VA) (KNB092FAAH➔KNB092FCAH:SUZ-KA35VA)
• Specification and position of muffler have been changed.
• Path of outdoor heat exchanger has been changed.
• 4-way valve and R.V. coil have been changed.
• Stop valve has been changed.
8.Fan motor has been changed.(AC➔DC)
9.Shape of grille has been changed.
10.Shape of service panel has been changed.
11.Shape of propeller has been changed.
12.Symbol on terminal block has been changed (to S1/S2/S3).
SUZ-A18VR ➔SUZ-KA50VA.TH
SUZ-A24VR ➔SUZ-KA60VA.TH
1.Indication of capacity has been changed.(BTU base ➔kW base)
2.Power supply method has been changed (change to supply from outdoor unit).
3.Outdoor electronic control P.C. board has been changed.
4.Noise filter P.C. board has been changed.
5.Length of fan motor lead wire has been changed.
6.Shape of relay panel has been changed.
7.Symbol on terminal block has been changed (to S1/ S2/ S3).
8.Control method between indoor and outdoor unit has been changed.
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.
OC322C--1qxp 07.3.12 3:43 PM 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 and 15.88 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.
4
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 refrigerant 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
refrigerant oil of the upper layer to flow back to the
compressor.
Since refrigerant and refrigerant oil are compatible each,
refrigerant oil backs to the compressor through the lower
position oil back hole.
Compressor
Suction muffler
Oil back hole
Refrigerant oil
Refrigerant
Compressor
Suction muffler
Oil back hole
Refrigerant oil /Refrigerant
Compressor
OC322C--1qxp 07.3.12 3:43 PM 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
15.88
17
22
26
29
Dimension of flare nut (mm)
R22
17
22
24
27
• 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.
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 refrigerant 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.
2. Refrigerant piping
1Specifications
Use the refrigerant pipes that meet the following specifications.
Wall thicknessOutside diameter
Pipe mm mm
For liquid
For gas
6.35
9.52
9.52
12.7
15.88
0.8
0.8
0.8
0.8
1.0
Heat resisting foam plastic
Specific gravity 0.045 Thickness
8 mm
Insulation material
5
OC322C--1qxp 07.3.12 3:43 PM 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-KA25VA.TH
SUZ-KA35VA.TH
SUZ-KA25VA.TH
SUZ-KA35VA.TH
SUZ-KA25VAH.TH
SUZ-KA35VAH.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-KA50VA(1).TH
SUZ-KA60VA(1).TH
SUZ-KA71VA(1).TH
SUZ-KA50VA.TH SUZ-KA50VA1.TH
SUZ-KA60VA.TH SUZ-KA60VA1.TH
SUZ-KA71VA.TH SUZ-KA71VA1.TH
OC322C--1qxp 07.3.12 3:43 PM 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 ✽1
Model
Output
Winding
resistance(at 20:)
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level
✽1
Fan speed(Highw/Loww, Highw/Medw/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 25:)
Thermistor RT62 (at 100:)
Thermistor RT64 (at 50:)
Thermistor RT65 (at 25:)
Thermistor RT68 (at 25:)
kW
r/h
K/h
A
A
A
W
"
"
mm
kg
dB
rpm
kg
k"
k"
k"
k"
k"
k"
k"
k"
k"
Single phase
230V,50Hz
3.65
KNB073FDVH(C)
550
U-V 1.53 U-W 1.53
V-W 1.53
RC0J50-AL
WHT-BLK 37.5
BLK-RED 37.5
RED-WHT 37.5
800o550o285
33
46
0.90
NEO22
32.6
13.4
17
10
—
—
—
—
—
Cooling
2.5(0.9-3.2)
0.5
2,058
2.74
0.31
3.62
810w/650w
2
880w/810w/650w
3840w/760w 2
880w/800w/630w
3
Heating
3.0(0.9-4.5)
—
1,938
3.37
0.28
3.61
SUZ-KA25VA(H).TH
Indoor Service Ref.
SLZ-KA25VA(L).TH Indoor Service Ref. SLZ-KA35VA(L).TH
Compressor
Fan motor
Special remarks
Coefficient of performance (C.O.P) ✽1
Capacity
Electrical data
SUZ-KA35VA(H).TH
Single phase
230V,50Hz
2,004
4.75
KNB092FCAH
650
U-V 0.49 U-W 0.49
V-W 0.49
RC0J50-AL
WHT-BLK 37.5
BLK-RED 37.5
RED-WHT 37.5
800o550o285
37
1.05
NEO22
32.6
13.4
17
10
—
—
—
—
—
Cooling
3.5(1.0-3.9)
1.2
4.22
0.33
3.30
47
Heating
4.0(0.9-5.0)
—
4.42
0.33
3.64
48
Indoor Service Ref.
SLZ-KA50VA(L).TH
SUZ-KA50VA.TH
SUZ-KA50VA1.TH
Single phase
230V,50Hz
6.75
0.30
SNB130FLDH or SNB130FLDH1
850
U-V 0.45 U-W 0.45
V-W 0.45
PM8H60-UB
WHT-BLK 15.2
BLK-RED 15.2
RED-WHT 15.2
840o850o330
53
2
1.60
NEO22
—
—
—
—
10.0
13.4
17.0
10.0
10.0
Cooling
4.6(1.1-5.2)
2.2
2,940/1,650
w
6.45
2.82
53/51w
800/480
w
Heating
5.0(0.9-6.5)
—
2,940/2,210
w
6.05
3.23
55/53w
800/620
w
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.
wReference value
SLZ-KA·VA(L).TH / SUZ-KA·VA(H).TH
OC322C--1qxp 07.3.12 3:43 PM Page 7

8
Single phase
230V,50Hz
3.65
KNB073FDVH(C)
550
U-V 1.53 U-W 1.53
V-W 1.53
RC0J50-AL
WHT-BLK 37.5
BLK-RED 37.5
RED-WHT 37.5
800o550o285
33
46
0.90
NEO22
32.6
13.4
17
10
Cooling
2.5(0.9-3.2)
1.0
2,058
2.74
0.31
3.42
810w/650w
2
Heating
3.0(0.9-4.5)
—
1,938
3.37
0.28
3.61
880w/810w/650w
3
Single phase
230V,50Hz
2,004
4.75
KNB092FCAH
650
U-V 0.49 U-W 0.49
V-W 0.49
RC0J50-AL
WHT-BLK 37.5
BLK-RED 37.5
RED-WHT 37.5
800o550o285
37
1.05
NEO22
32.6
13.4
17
10
Cooling
3.5(1.0-3.9)
1.2
4.22
0.33
3.30
47
840w/760w
2
Heating
4.0(0.9-5.0)
—
4.42
0.33
3.64
48
880w/800w/630w
3
Outdoor Service Ref.
Function
Power supply
Capacity Rated frequency(Min.-Max.)
Dehumidification
Air flow ✽1
Starting current (Total) ✽1
Compressor motor current ✽1
Fan motor current ✽1
Model
Output
Winding
resistance(at 20:)
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level ✽1
Fan speed(Highw/Loww, High/Med.w/Loww)
Fan speed regulator
Refrigerant filling
capacity(R410A)
Refrigeration 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
✽1
W
"
"
mm
kg
dB(A)
rpm
kg
k"
k"
k"
k"
Compressor
Fan motor
Special remarks
Coefficient of performance(C.O.P)
Capacity
Electrical data
SUZ-KA25VA(H).TH
Indoor Service Ref.
SEZ-KC25VA.W
SUZ-KA35VA(H).TH
Indoor Service Ref.
SEZ-KA35VA.TH
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19:
Outdoor Dry-bulb temperature 35:Wet-bulb temperature(24:)
Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15:
Outdoor Dry-bulb temperature 7:Wet-bulb temperature 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency
wReference value
SEZ-KC·VA.W, SEZ-KA·VA.TH / SUZ-KA·VA(H).TH
OC322C--1qxp 07.3.12 3:43 PM 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 25:)
Thermistor RT62 (at 100 :)
Thermistor RT64 (at 50:)
Thermistor RT65 (at 25:)
Thermistor RT68 (at 25:)
kW
r/h
K/h
A
A
A
W
"
"
mm
kg
dB
rpm
kg
k"
k"
k"
k"
k"
Indoor Service Ref.
SEZ-KA50VA.TH
Compressor
Fan motor
Special remarks
Coefficient of performance(C.O.P)
Capacity
Electrical data
SUZ-KA50VA.TH
SUZ-KA50VA1.TH
Single phase
230V,50Hz
6.75
0.30
SNB130FLDH or SNB130FLDH1
850
U-V 0.45 U-W 0.45
V-W 0.45
RC0J60-AA
BLK-WHT 15.2
WHT-RED 15.2
RED-BLK 15.2
840o850o330
53
2
1.60
NEO22
10.0
13.4
17.0
10.0
10.0
Cooling
5.0(1.1-5.6)
1.9
2,940/1,650w
6.45
2.81
53/51w
800/480w
Heating
5.9(1.1-7.2)
—
2,940/2,210w
6.05
3.21
55/53w
800/620w
Indoor Service Ref.
SEZ-KA60VA.TH
SUZ-KA60VA.TH
SUZ-KA60VA1.TH
Single phase
230V,50Hz
9.75
0.30
SNB130FLDH or SNB130FLDH1
850
U-V 0.45 U-W 0.45
V-W 0.45
RC0J60-AA
BLK-WHT 15.2
WHT-RED 15.2
RED-BLK 15.2
840o850o330
53
2
1.80
NEO22
10.0
13.4
17.0
10.0
10.0
Cooling
5.5(1.1-6.3)
2.0
2,940/1,650w
8.05
2.81
53/51w
800/480w
Heating
6.9(0.9-8.0)
—
2,940/2,210w
9.45
2.82
55/53w
800/620w
Indoor Service Ref.
SEZ-KA71VA.TH
SUZ-KA71VA.TH
SUZ-KA71VA1.TH
Single phase
230V,50Hz
10.30
0.30
TNB220FMCH(T)
1300
U-V 1.41 U-W 1.41
V-W 1.41
RC0J60-AA
BLK-WHT 15.2
WHT-RED 15.2
RED-BLK 15.2
840o850o330
58
2
2.00
NEO22
10.0
13.4
17.0
10.0
10.0
Cooling
7.1(0.9-8.3)
2.7
2,940/1,650w
10.00
2.89
53/51w
800/480w
Heating
8.1(0.9-10.4)
—
2,940/2,210w
9.60
3.43
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.
wReference value
SEZ-KA·VA.TH / SUZ-KA·VA.TH
OC322C--1qxp 07.3.12 3:43 PM Page 9

10
Model
Item
Current transformer
Current transformer
Smoothing capacitor
Diode module
Fuse
Fuse
Defrost heater
Intelligent power module
Expansion valve coil
Reactor
Current-detecting resistor
Current-detecting resistor
Current-limiting resistor
Terminal block
Relay
Relay
Relay
R.V. coil
Heater protector
SUZ-KA25VA.TH
(CT)
(CT761, CT781)
(
C63A, C63B, C63C )
(DB61, DB65)
(F61)
(F71, F801, F901)
(H)
(IPM)
(LEV)
(L61)
(R61)
(R831)
(
R64A, R64B )
(TB1,TB2)
(X63)
(X64)
(X66)
(21S4)
(26H)
SUZ-KA25VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH
ETA19Z59BZ
ETQ19Z71AY
620+ 420V
D25XB60
250V 20A
250V 3.15A
PS21244-A-203
CAD-MD12ME 12VDC
10A 23.0mH
25m"5W
5.1"5W
3P
G5NB-1a
G4A-1A-PS
STF-01AJ503
—
—
—
230V 130W
G5NB-1a
Open 45:
—
—
—
230V 130W
G5NB-1a
Open 45:
45m"5W (1 element) 50m"5W (2 elements)
Specifications and rating conditions of main electric parts
Model
Item
Smoothing capacitor
Current transformer
Current transformer
Fuse
Fuse
Fuse
Intelligent power module
High pressure switch
Intelligent power module
Reactor
Expansion valve coil
Power factor controller
Resistor
Resistor
Resistor
Solenoid coil relay
Terminal block
Terminal block
Relay
R.V. coil
(CB1,2,3)
(CT1,2)
(CT61)
(F64)
(F801)
(F911)
(HC930)
(HPS)
(IPM)
(L)
(LEV)
(PFC)
(R64A,B)
(R937A,B)
(RS1~4)
(SSR61)
(TB1)
(TB2)
(X64)
(21S4)
560+450V
ETQ19Z68AY
ETQ19Z53AY
250V 2A
250V 3.15A
250V 1A
PS21661-RZ
PS21244-A
340µH 20A
CAM-MD12ME
PS51259-A
10"10W
1.1"2W 2%
0.04"7W
TLP3506
3P
3P
G4A
LD30013
SUZ-KA50VA.TH
SUZ-KA50VA1.TH SUZ-KA60VA.TH
SUZ-KA60VA1.TH SUZ-KA71VA.TH SUZ-KA71VA1.TH
— ACB-DB156
SUZ-KA25VA.TH SUZ-KA25VAH.TH
SUZ-KA35VA.TH SUZ-KA35VAH.TH
SUZ-KA50VA.TH SUZ-KA50VA1.TH
SUZ-KA60VA.TH SUZ-KA60VA1.TH
SUZ-KA71VA.TH SUZ-KA71VA1.TH
OC322C--1qxp 07.3.12 3:43 PM 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 re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION SPL(dB(A)) LINE
High
Med.
FAN SPEED
HEATING
46
46
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
SUZ-KA25VA.TH
SUZ-KA25VAH.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 re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION SPL(dB(A)) LINE
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
High
Med.
SUZ-KA35VA.TH
SUZ-KA35VAH.TH
COOLING
FUNCTION SPL(dB(A)) LINE
High
FAN 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 re 0.0002 MICRO BAR
SUZ-KA50VA.TH SUZ-KA50VA1.TH
SUZ-KA60VA.TH SUZ-KA60VA1.TH
SUZ-KA71VA.TH SUZ-KA71VA1.TH
OC322C--1qxp 07.3.12 3:43 PM 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 10X21
Drain hole [33 (SUZ-KA25/KA35VAH)
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.
Drain hole [42 (SUZ-KA25/KA35VA)
Unit: mm
OUTDOOR UNIT
SUZ-KA25VA.TH SUZ-KA25VAH.TH
SUZ-KA35VA.TH SUZ-KA35VAH.TH
OC322C--1qxp 07.3.12 3:43 PM 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-KA50VA)
[15.88···(SUZ-KA60/KA71VA)
Liquid refrigerant
pipe joint
Refrigerant pipe(flared)
[6.35·····(SUZ-KA50/KA60VA)
[9.52·····(SUZ-KA71VA)
REQUIRED SPACE
OUTDOOR UNIT
SUZ-KA50VA.TH SUZ-KA50VA1.TH
SUZ-KA60VA.TH SUZ-KA60VA1.TH
SUZ-KA71VA.TH SUZ-KA71VA1.TH
OC322C--1qxp 07.3.12 3:43 PM Page 13

14
7WIRING DIAGRAM
OUTDOOR UNIT
SUZ-KA25VA.TH
SUZ-KA35VA.TH
SYMBOL CT,CT761,CT781 C63A,C63B,C63C DB61,DB65 DSA61 F61 F71 F801,F901 IC801 IPM,IC932
SYMBOL L61 L62,L63 MC MF NR63,NR64 RT61 RT62 RT64 RT65
SYMBOL
R61,R831 R64A,R64B TB1,TB2 TR821 T801 X63,X64 21S4 LEV
NAME
CURRENT TRANSFORMER SMOOTHING CAPACITOR DIODE MODULE SURGE ABSORBER FUSE (T20AL250V) FUSE (T3.15AL250V) FUSE (T3.15AL250V) INTELLIGENT POWER DEVICE INTELLIGENT POWER MODULE
NAME
REACTOR CMC COIL COMPRESSOR OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR AMBIENT TEMPERATURE THERMISTOR
NAME
CURRENT-DETECTING RESISTOR CURRENT-LIMITING RESISTOR TERMINAL BLOCK SWITCHING POWER TRANSISTOR TRANSFORMER RELAY R.V. COIL EXPANSION 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
MODELS WIRING DIAGRAM
+++
F61
GRN
~/N
230V~
12-24V
230V 50Hz
CIRCUIT BREAKER
PE
RED
BLU
WHITE
GRN/YLW
TB1
POWER SUPPLY
L N
TB2
S3 S1
TO INDDOR UNIT
CONNECTING
S2
RED BLU WHT
NR63
LDE
4
6
CN726
CN727
TB800
C63B
POWER P.C. BOARD
INVERTER P.C. BOARD
21S4
X63
CN721
1 2
L61
TAB63
3
LD69
RT61 RT62 RT64RT65
CN642
CN641
CN643
21213412
GRN
231
CN601
45
IC801 F901
IC932
CN931
315
42
12
3
CN932
5
42
13
MF
LD-V
LD-W
LD-U
3
1
WHT BLK RED RED
V
BLK
WHT
WU
wc
CN61
IPM CT781
CT761
2
CN724
LEV
6
R61
N
U V W
P
F801
C63C
R831
DB65
DB61
TR821
C63A
T801
LDY
CN725
BLK
LD70
BLK
L63
NR64
DSA61
CT
TAB61 L62
X64
4
F71
TAB62
BLK
BLU
R64AR64B
WHT
OC322C--1qxp 07.3.12 3:43 PM Page 14

15
OUTDOOR UNIT
SUZ-KA25VAH.TH
SUZ-KA35VAH.TH
SYMBOL CT,CT761,CT781 C63A,C63B,C63C DB61,DB65 DSA61 F61 F71 F801,F901 IC801 IPM,IC932 LEV
SYMBOL L61 L62,L63 MC MF
NR63,NR64 RT61 RT62 RT64 RT65 R61,R831
SYMBOL R64A,R64B TB1,TB2 TR821 T801 X63,X64,X66 21S4 H 26H
NAME
CURRENT TRANSFORMER SMOOTHING CAPACITOR DIODE MODULE SURGE ABSORBER FUSE (T20AL250V) FUSE (T3.15AL250V) FUSE (T3.15AL250V) INTELLIGENT POWER DEVICE INTELLIGENT POWER MODULE EXPANSION VALVE COIL
NAME
REACTOR CMC COIL COMPRESSOR OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR AMBIENT TEMPERATURE THERMISTOR CURRENT-DETECTING RESISTOR
NAME
CURRENT-LIMITING RESISTOR TERMINAL BLOCK SWITCHING POWER TRANSISTOR TRANSFORMER RELAY R.V. COIL DEFROST HEATER HEATER PROTECTOR
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
MODELS WIRING DIAGRAM
IC932
F901
CT
43
NR64 NR63
GRN
DSA61
LDE
23145
CN601
LDY
GRN
MF
RT65 RT64RT62RT61
3
12 45
21
3212 4513
CN931
CN932
431212
CN643 CN641 CN642
3 1 2
X66
CN722
1 2
YLW
BLK BLK
BLKBLK
BLK BLK
1 2
BLK
RED
CN725
6
4
CN727 CN726
TB800
POWER P.C. BOARD
INVERTER P.C. BOARD
21S4
X63
CN721
1 2
IC801
F801
C63C
LD-V
LD-W
LD-U
3
1
WHT BLK RED
RED
V
BLK
WHT
WU
MC
CN61
IPM
CT781
CT761
2
CN724
LEV
6
R61
N
U V W
P
L61 BLK
R831
TAB63
LD69
DB65
DB61
LD70
TR821
C63B
C63A
BLK
T801
L63
F61
TAB61
L62
X64
F71
TAB62
BLK
BLU
H
26H
+++
12-24V
TO INDDOR UNIT
CONNECTING
PE
CIRCUIT BREAKER
~/N 230V 50Hz
POWER SUPPLY
230V
~
RED BLU WHITE
GRN/YLW
TB1
L N
R64A
TB2
S3 S1 S2
RED BLU WHT
R64B
WHT
OC322C--1qxp 07.3.12 3:43 PM Page 15

16
SUZ-KA50VA.TH SUZ-KA50VA1.TH
SUZ-KA60VA.TH SUZ-KA60VA1.TH
R64B
YLW
230V~
12-24V
CN912
CN663
WHT
BLU
NOISE FILTER P.C.BOARD
BRN
TO INDOOR UNIT CONNECTING
RED
S3
RT65
21
CN61
13
GRN/YLW
5
PFC
GRN
LD9
POWER BOARD
RT64
21
CN3
RED
WHT
RS2
RS1
R64A
RS3
RS4
F801
CN901
NR64
ELECTRONIC CONTROL P.C.BOARD
CB1
CB2
CB3
HC930
IPM
NF
BLK BLK BLK
BLK WHT RED YLW BLU ORN PNK GRY
BLU WHT
GRN
GRN
BLU
BLU
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK RED
BLU
L
CT2 CT1
SSR61
U
6
CN7954123 78
CN661
W
CN4
TB2
S1
1
CN601
3
S2
1567
CN702
5321 CN781 13
CN701
12 12
CN931
LD1LD2
T801 R937A
R937B
CN801
23134512
MF
CN932
3X64 5123
LDE2
12
CT61
TAB1
F64
F911
LDE1
21S4
POWER SUPPLY ~/N 230V 50Hz
TAB2
N
PE
L
TB1
CIRCUIT BREAKER
4 1
RED YLW
3 2
RED
S R
21
CN903
21
CN902
21
CN5
6543 1
CN2 27
TAB4 V
MC
W
U
V
WHT
RT61 RT62 RT68 LEV
MODELS WIRING DIAGRAM
OUTDOOR UNIT
:Terminal block :Connector 3.Symbols below indicate. 2.Use copper conductors only (for field wiring).
diagram for servicing.
refer to the indoor unit electric wiring
1.About the indoor side electric wiring,NOTES:
SYMBOL
NAME
SYMBOL
NAME
CURRENT TRANSFORMER
FUSE (T1AL 250V)
LEV EXPANSION VALVE COIL
LREACTOR
IPM INTELLIGENT POWER MODULE
CT61 FUSE (T2AL 250V)
F64
CT1, 2 CURRENT TRANSFORMER
HC930 INTELLIGENT POWER MODULE
F911
F801 FUSE (T3.15AL 250V)
SMOOTHING CAPACITOR
CB1~3 OUTDOOR FAN MOTOR
POWER FACTOR CONTROLLER
NOISE FILTER
RT61
DISCHARGE TEMPERATURE THERMISTOR
RS1~4 RESISTOR
R937A, B
RESISTOR
MF
MC COMPRESSOR
R64A,B RESISTOR
PFC
NF
NR64 VARISTOR
AMBIENT TEMPERATURE THERMISTOR
SOLENOID COIL RELAY
21S4 R.V. COIL
X64 RELAY
TB1 TERMINAL BLOCK TB2 TERMINAL BLOCK
RT65
FIN TEMPERATURE THERMISTOR
RT64
T801 TRANSFORMER
SSR61
RT68 OUTDOOR HEAT EXCHANGER
TEMPERATURE THERMISTOR
DEFROST THERMISTOR
RT62
NAME
SYMBOL
OC322C--1qxp 07.3.12 3:43 PM Page 16

17
SUZ-KA71VA.TH SUZ-KA71VA1.TH
BLK
CN902
12 CN903 12
TAB4
X64 3
R64A R64B RED
2 3
1 4
L
YLW
YLW RED
230V~
12-24V
CN912
CN663
WHT
BLU
NOISE FILTER P.C.BOARD
BRN
TO INDOOR UNIT CONNECTING
RED
S3
RT65
21
CN61
13
GRN/YLW
5
PFC
GRN
LD9
POWER BOARD
RT64
21
CN3
HPS
RED
RED
RED
WHT
RS2
RS1 RS3
RS4
F801
CN901
NR64
CN681
ELECTRONIC CONTROL P.C.BOARD
CB1
CB2
CB3
HC930
IPM
NF
BLK BLK BLK
BLK WHT RED YLW BLU ORN PNK GRY
BLU WHT
GRN
GRN
BLU
BLU
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK RED
BLU
CT2 CT1
SSR61
U
6
CN7954123 78
CN661
12
W
CN4
TB2
S1
1
CN601
3
S2
1567
CN702
5321 CN781 13
CN701
12 12
CN931
LD1LD2
T801 R937A
R937B
CN801
23134512
MF
CN932
5123
LDE2
12
CT61
TAB1
F64
F911
LDE1
21S4
POWER SUPPLY ~/N 230V 50Hz
TAB2
N
PE
L
TB1
CIRCUIT BREAKER
S R
21
CN5
6543 1
CN2 27
V
MC
W
U
V
WHT
RT61RT62 RT68 LEV
MODEL WIRING DIAGRAM
OUTDOOR UNIT
:Terminal block :Connector 3.Symbols below indicate. 2.Use copper conductors only (for field wiring).
diagram for servicing.
refer to the indoor unit electric wiring
1.About the indoor side electric wiring,NOTES:
SYMBOL
NAME
SYMBOL
NAME
CURRENT TRANSFORMER
FUSE (T1AL 250V)
LEV EXPANSION VALVE COIL
LREACTOR
IPM INTELLIGENT POWER MODULE
HPS HIGH PRESSURE SWITCH
CT61
CT1, 2 CURRENT TRANSFORMER
HC930 INTELLIGENT POWER MODULE
F911
F801 FUSE (T3.15AL 250V)
F64 FUSE (T2AL 250V)
SMOOTHING CAPACITORCB1~3 OUTDOOR FAN MOTOR
POWER FACTOR CONTROLLER NOISE FILTER
RT61
DISCHARGE TEMPERATURE THERMISTOR
RS1~4 RESISTOR
R937A, B
RESISTOR
MF
MC COMPRESSOR
R64A,B RESISTOR
PFC
NF
NR64 VARISTOR
FIN TEMPERATURE THERMISTOR
SOLENOID COIL RELAY
21S4 R.V. COIL
X64 RELAY
TB1 TERMINAL BLOCK TB2 TERMINAL BLOCK
RT64
T801 TRANSFORMER
SSR61
AMBIENT TEMPERATURE THERMISTOR
RT65 RT68 OUTDOOR HEAT EXCHANGER
TEMPERATURE THERMISTOR
DEFROST THERMISTOR
RT62
NAME
SYMBOL
OC322C--1qxp 07.3.12 3:43 PM Page 17

18
REFRIGERANT SYSTEM DIAGRAM
8
OUTDOOR UNIT
Unit:mm
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainer)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
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
Strainer
#100
Capillary tube
[3.0✕[1.8✕600(✕2)
Expansion
valve
Ambient
temperature
thermistor
RT65
Muffler
Muffler
Muffler
SUZ-KA25VA.TH
SUZ-KA25VAH.TH
OUTDOOR UNIT
Unit:mm
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainer)
Stop valve
(with service port)
Capillary tube
[3.0✕[2.0✕240
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe [9.52
(with heat insulator)
Refrigerant pipe [6.35
(with heat insulator)
Expansion
valve R.V. coil
heating ON
cooling OFF
Strainer
#100
Muffler
Muffler
Ambient
temperature
thermistor
RT65
Muffler
SUZ-KA35VA.TH
SUZ-KA35VAH.TH
OC322C--1qxp 07.3.12 3:43 PM Page 18

19
SUZ-KA50VA.TH SUZ-KA50VA1.TH
SUZ-KA60VA.TH SUZ-KA60VA1.TH
OUTDOOR UNIT
Unit:mm
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
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-KA50VA)
(with heat insulator) [15.88 (SUZ-KA60VA)
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
Ambient
temperature
thermistor
RT65
Strainer
#100
SUZ-KA71VA.TH SUZ-KA71VA1.TH
OUTDOOR UNIT Unit:mm
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
[3.6✕[2.4✕50
Capillary tube
[1.8✕[0.6✕1000
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe [15.88
(with heat insulator)
Refrigerant pipe [9.52
(with heat insulator)
LEV R.V. coil
heating ON
cooling OFF
Oil separator High-pressure
switch
Strainer
#100
Receiver
Outdoor
heat
exchanger
temperature
thermistor
RT68
Strainer
#100
Strainer
#100 Ambient
temperature
thermistor
RT65
OC322C--1qxp 07.3.12 3:43 PM Page 19

20
ADDITIONAL REFRIGERANT CHARGE (R410A:g)
Outdoor unit
precharged
900
1,050
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-KA25VA.TH
SUZ-KA25VAH.TH
SUZ-KA35VA.TH
SUZ-KA35VAH.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
Refrigerant piping
Max. length : m
A
20
Gas
9.52
Liquid
6.35
Piping size O.D : mm
Models
SUZ-KA25VA.TH
SUZ-KA35VA.TH
SUZ-KA25VAH.TH
SUZ-KA35VAH.TH
SUZ-KA25VA.TH SUZ-KA25VAH.TH
SUZ-KA35VA.TH SUZ-KA35VAH.TH
MAX. REFRIGERANT PIPING LENGTH
OC322C--1qxp 07.3.12 3:43 PM Page 20