Mitsubishi Electric SUZ-KA09NAHZ User manual

SERVICE MANUAL R410A
Outdoor unit
[Model Name]
SUZ-KA09NAHZ
SUZ-KA12NAHZ
SUZ-KA15NAHZ
SUZ-KA18NAHZ
[Service Ref.]
SUZ-KA09NAHZ.TH
SUZ-KA12NAHZ.TH
SUZ-KA15NAHZ.TH
SUZ-KA18NAHZ.TH
PARTS CATALOG (OCB709)
CONTENTS
1. COMBINATION OF INDOOR AND OUTDOOR UNITS
...
2
2. PART NAMES AND FUNCTIONS...................... 2
3. SPECIFICATION................................................. 3
4. OUTLINES AND DIMENSIONS.......................... 4
5. WIRING DIAGRAM............................................ 5
6. REFRIGERANT SYSTEM DIAGRAM................ 7
7. DATA................................................................... 9
8. ACTUATOR CONTROL.....................................14
9. SERVICE FUNCTIONS......................................15
10. TROUBLESHOOTING.......................................15
11. FUNCTION SETTING........................................ 32
12. DISASSEMBLY INSTRUCTIONS......................35
Note:
• This manual describes
service data of the outdoor
units only.
No. OCH709
REVISED EDITION-A
December 2019
SPLIT-TYPE, AIR CONDITIONERS
SUZ-KA09NAHZ.TH
OCH709 is void.
Revision:
• 3.SPECIFICATION has
been revised in REVISED
EDITION-A.

2
OCH709A
1COMBINATION OF INDOOR AND OUTDOOR UNITS
OUTDOOR UNIT
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
PART NAMES AND FUNCTIONS
2
SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH
Outdoor unit
Indoor unit
SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH
Service Ref. Service
Manual No.
SLZ-KF09/12/15/18NA OCH669
OCB669 ○○○○
SEZ-KD09/12/15/18NA4 HWE08020
BWE10180 ○○○○
PEAD-09/12/15/18AA7 HWE16080
BWE016290 ○○○○
SVZ-KP12/18NA MD-1404-K019
MD-1404-K018 ○ ○
MLZ-KP09/12/18NA OBH802
OBB802 ○ ○ ○

3
OCH709A
Outdoor unit model SUZ-KA09
NAHZ
SUZ-KA12
NAHZ
SUZ-KA15
NAHZ
SUZ-KA18
NAHZ
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 15 20
Min. circuit ampacity A 14 17
Fan motor F.L.A 0.67 1.00
Compressor
Model SNB130FHBM2T SNB220FQGMT
R.L.A 10.0 13.0
L.R.A 12.5 16.0
Refrigeration oil oz. (Model) 22.0 (FV50S) 23.7 (FV50S)
Refrigerant control Linear expansion valve
Sound level*1Cooling dB(A) 54 55
Heating dB(A) 55
Defrost method Reverse cycle
Dimensions
W in 33-1/16
D in 13
H in 34-5/8
Weight Ib 129 131
External nish Munsell 3Y 7.8/1.1
Control voltage
(by built-in transformer) VDC 12 - 24
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Liquid in 1/4 (0.0265) 1/4 (0.0265)
Gas in 3/8 (0.0285) 1/2 (0.0285)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units
Height difference ft 40 50
Piping length ft 65 100
Refrigerant charge (R410A) 3 lb. 9 oz. 3 lb. 12 oz.
Note: Test conditions are based on AHRI 210/240.
Rating conditions (Cooling) — Indoor: 80˚F D.B., 67˚F W.B., Outdoor: 95˚F D.B., (75˚F W.B.)
(Heating) — Indoor: 70˚F D.B., 60˚F W.B., Outdoor: 47˚F D.B., 43˚F W.B.
3SPECIFICATION
OPERATING RANGE
(1) POWER SUPPLY
Rated voltage Guaranteed voltage (V)
Outdoor unit
208/230 V
1 phase
60 Hz
Min. 187 208 230 Max. 253

4
OCH709A
Unit: inch
SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH
4OUTLINES AND DIMENSIONS
16-7/16
1-9/16
1-5/8
Drain hole
6-7/8 19-11/16
13
2
Air in
Air in
Air out
2-holes 13/32 13/16
14-3/16
33-1/16
4-5/16
3-3/16
34-5/8
17-25/32
Service panel
3-29/32
6-1/2
7-11/16
35
44
Liquid refrigerant pipe joint
Refrigerant pipe (flared) Ø 1/4
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø 3/8 (KA09/12)
Refrigerant pipe (flared) Ø 1/2 (KA15/18)
*1 20 in. (500 mm) or more when front
and sides of the unit are clear
14 in. (350 mm)
or more
4 in. (100 mm)
or more
REQUIRED SPACE
Clear *1
4 in. (100 mm)
or more
20 in. (500 mm)
or more *2
*2 When any 2 sides of left, right
and rear of the unit are clear

5
OCH709A
5WIRING DIAGRAM
SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH

6
OCH709A
SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH

7
OCH709A
Unit: inch (mm)
SUZ-KA09NAHZ.TH SUZ-KA12NAHZ.TH
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Capillary tube
O.D. 0.157×
I.D. 0.094×
3-15/16
(ø 4.0 × ø 2.4 × 100)
Capillary tube
O.D. 0.157×
I.D. 0.094×7-7/8
(ø 4.0 × ø 2.4 × 200)
Refrigerant flow in cooling
Compressor
4-way
valve
Refrigerant flow in heating
Refrigerant pipe
ø3/8 ( ø 9.52)
(with heat insulator)
Refrigerant pipe ø1/4 ( ø 6.35)
(with heat insulator)
LEV
R.V. coil
heating ON
cooling OFF
Strainer
#100
Outdoor heat
exchanger
temperature
thermistor
RT68
Strainer
#100
Muffler
Capillary tube
O.D. 0.118×
I.D. 0.079× 7-7/8
(ø3.0×ø2.0×200(×4))
Stop valve
(with service port)
Service
port
Service port
Muffler
Strainer
#100
6REFRIGERANT SYSTEM DIAGRAM
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
O.D. 0.157 × I.D. 0.094
× 7-7/8
(ø 4.0 × ø 2.4 × 100)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe
ø 1/2 ( ø12.7)
(with heat insulator)
Refrigerant pipe ø 1/4 ( ø6.35)
(with heat insulator)
LEV
R.V. coil
heating ON
cooling OFF
Muffler
#100
Receiver
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Service port
Service port
Unit: inch (mm)
SUZ-KA15NAHZ.TH SUZ-KA18NAHZ.TH

8
OCH709A
Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Model
Refrigerant piping: ft. Piping size O.D: in.
Max. Length
A
Max. Height difference
BGas Liquid
SUZ-KA09NAHZ 65 40 3/8 1/4
SUZ-KA12NAHZ 65 40 3/8 1/4
SUZ-KA15NAHZ 65 40 1/2 1/4
SUZ-KA18NAHZ 100 50 1/2 1/4
ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)
No additional refrigerant charge up to the maximum refrigerant piping length.

9
OCH709A
7DATA
STANDARD OPERATION DATA
Representative matching SEZ-KD09NA4 SEZ-KD12NA4 SEZ-KD15NA4 SEZ-KD18NA4
Item Unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating
Total
Capacity BTU/h 9,000 12,500 12,000 15,000 15,000 18,000 18,000 21,600
SHF – 0.79 - 0.76 - 0.80 - 0.87 -
Input kW 0.69 1.30 0.92 1.12 1.20 1.92 1.37 1.84
Electrical circuit
Indoor unit SEZ-KD09NA4 SEZ-KD12NA4 SEZ-KD15NA4 SEZ-KD18NA4
Power supply (V, phase, Hz) 230, 1, 60
Input kW 0.06 0.04 0.07 0.05 0.09 0.07 0.09 0.07
Current A 0.50 0.39 0.57 0.46 0.74 0.63 0.74 0.63
Outdoor unit SUZ-KA09NAHZ SUZ-KA12NAHZ SUZ-KA15NAHZ SUZ-KA18NAHZ
Power supply (V, phase, Hz) 230, 1, 60
Input kW 0.63 1.26 0.85 1.07 1.11 1.85 1.28 1.77
Current A 3.4 5.41 3.42 4.29 4.51 7.67 5.22 7.37
Refrigerant circuit
Condensing pressure PSIG 339 513 357 393 378 425 359 391
Suction pressure
PSIG
135 118 134 113 133 89 141 96
Discharge temperature °F 137 163 147 162 149 172 149 173
Condensing temperature °F 103 131 108 115 149 121 109 115
Suction temperature °F 49 40 47 38 46 26 52 29
Ref. pipe length ft. 25
Refrigerant charge (R410A) – 1.6 1.7
Indoor
unit
Intake air temperature DB °F 80 70 80 70 80 70 80 70
WB °F 67 60 67 60 67 60 67 60
Discharge air temperature DB °F 61 107 56 105 57 101 57 101
Outdoor
unit
Intake air temperature DB °F 95 47 95 47 95 47 95 47
WB °F 75 43 75 43 75 43 75 43

10
OCH709A
Representative matching SLZ-KF09NA SLZ-KF12NA SLZ-KF15NA SLZ-KF18NA
Item Unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating
Total
Capacity BTU/h 9,000 11,000 12,000 13,800 13,700 16,400 16,800 18,800
SHF – 0.77 - 0.71 - 0.72 - 0.72 -
Input kW 0.60 0.82 0.94 1.17 1.10 1.83 1.34 2.02
Electrical circuit
Indoor unit SLZ-KF09NA SLZ-KF12NA SLZ-KF15NA SLZ-KF18NA
Power supply (V, phase, Hz) 230, 1, 60
Input kW 0.02 0.02 0.02 0.02 0.03 0.03 0.04 0.04
Current A 0.20 0.15 0.24 0.19 0.32 0.27 0.43 0.38
Outdoor unit SUZ-KA09NAHZ SUZ-KA12NAHZ SUZ-KA15NAHZ SUZ-KA18NAHZ
Power supply (V, phase, Hz) 230, 1, 60
Input kW 0.58 0.80 0.92 1.15 1.07 1.80 1.3 1.98
Current A 2.41 3.42 3.85 4.90 4.44 7.69 5.40 8.40
Refrigerant circuit
Condensing pressure PSIG 340 423 335 428 375 506 354 512
Suction pressure
PSIG
145 118 124 119 128 111 121 107
Discharge temperature °F 137 162 139 162 149 172 159 171
Condensing temperature °F 105 121 102 120 112 131 107 123
Suction temperature °F 51 40 45 39 57 38 46 37
Ref. pipe length ft. 25
Refrigerant charge (R410A) – 1.6 1.7
Indoor
unit
Intake air temperature DB °F 80 70 80 70 80 70 80 70
WB °F 67 60 67 60 67 60 67 60
Discharge air temperature DB °F 56 104 58 106 59 111 57 108
Outdoor
unit
Intake air temperature DB °F 95 47 95 47 95 47 95 47
WB °F 75 43 75 43 75 43 75 43