Mitsubishi Electric Mr.SLIM SUZ-KA09NA User manual

SERVICE MANUAL
No.OCH467
REVISED EDITION-A
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
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................ 8
7. DATA.................................................................11
8. ACTUATOR CONTROL....................................13
9. SERVICE FUNCTION.......................................14
10. TROUBLESHOOTING......................................14
11. FUNCTION SETTING....................................... 30
12. DISASSEMBLY INSTRUCTIONS.....................33
HFC
utilized
R410A
July 2011
R410A
Outdoor unit
[Model names] [Service Ref.]
SUZ-KA09NA SUZ-KA09NA.TH
SUZ-KA12NA SUZ-KA12NA.TH
SUZ-KA15NA SUZ-KA15NA.TH
SUZ-KA18NA SUZ-KA18NA.TH
Note:
This service manual describes serv-
ice data of the outdoor units.
• RoHS compliant products have
<G> mark on the spec name plate.
PARTS CATALOG (OCB467)
SUZ-KA18NA.TH
Revision:
• SLZ-KA·NA models have been
added as connectable indoor units.
• Some descriptions have been mod-
ified.
• Please void OCH467.

2
3
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
1COMBINATION OF INDOOR AND OUTDOOR UNITS
OUTDOOR UNIT
Piping
Air outlet
Drain hose
Drain outlet
Air inlet
(back and side)
SUZ-KA18NA
PART NAMES AND FUNCTIONS
2
SUZ-KA09NA SUZ-KA12NA SUZ-KA15NA
Heat pump type
Outdoor unit
SUZ-
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Indoor unit
Service
Manual No.
Service Ref.
Heat pump without
electric heater
KA18NA.THKA15NA.TH
HWE08020
KA12NA.THKA09NA.TH
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SEZ-KD09NA4.TH
SEZ-KD12NA4.TH
SEZ-KD15NA4.TH
SEZ-KD18NA4.TH
SLZ-KA09NA.TH
SLZ-KA12NA.TH
SLZ-KA15NA.TH
OCH487
OCB487
OUTDOOR UNIT

2
3
Outdoor unit model SUZ-KA09NA SUZ-KA12NA SUZ-KA15NA SUZ-KA15NA
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 12 12 12 14
Fan motor F.L.A 0.50 0.93
Compressor
Model KNB073FQDHC KNB092FQAHC SNB130FQBH
R.L.A 6.6 6.6 7.4 10.0
L.R.A 8.2 8.2 9.3 12.5
Refrigeration oil oz. (Model) 10.8 (NEO22) 15.2 (NEO22)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 46 49 49 54
Heating dB(A) 50 51 51 56
Defrost method Reverse cycle
Dimensions W in. 31-1/2 33-1/16
D in. 11-1/4 13
H in. 21-5/8 33-7/16
Weight Ib. 66 77 80 119
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 (0.0315)
Gas in. 3/8 (0.0315) 1/2 (0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units Height difference ft. 40 50
Piping length ft. 65 100
Refrigerant charge (R410A) 1 lb. 16 oz. 2 lb. 9 oz. 3 lb. 16 oz.
NOTE: Test conditions are based on AHRI 210/240.
1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB)
(Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB
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
5
Unit: inch
SUZ-KA09NA SUZ-KA12NA SUZ-KA15NA
Liquid pipe :1/4 (flared)
Gas pipe :3/8 (flared) (KA09/12)
1/2 (flared) (KA15)
6-23/32
2
5-7/8
2-23/32
1-3/4
15-3/4
12 ~ 12-3/4
13-9/16
11/16
1-9/16
7/8
21-5/8
11-1/32
13/32
31-1/2
19-11/16 5-15/16
11-29/32
17/3229/32 11-1/4
Air in
handle
Air in
Air out
2- 3/8 13/16 Oval hole
Drain hole 1-5/8
REQUIRED SPACE Basically open 4 inch or more
without any obstruction in front
and on both sides of the unit.
14 in. or more
8 in. or more
4 in. or more
4 in. or more
Open two sides of left,
right, or rear side.
SUZ-KA18NA
20-9/32
14-3/16
Air in
11-25/32
2-19/32
Air in
Air out
19-11/16
33-1/16
13
2
4-25/32
33-7/16
16-15/16
3-3/16
4-3/8 × 13/16 slot
1-11/32
1-9/16
Drain 3 holes
(ø1 -5/16)
30°
35°
2-9/16
Liquid:1/4(flared)
Gas :1/2(flared)
3-9/16
8-11/32
Open as a rule 20 inch or more
if the front and both sides are open
4 inch or more/8 inch
or more if there are
obstacles to both sides
Open as a rule
20 inch or more if the back,
both sides and top are open
REQUIRED SPACE
14 in. or more
4 in. or more
4OUTLINES AND DIMENSIONS

4
5
SUZ-KA09NA SUZ-KA12NA
5WIRING DIAGRAM
SUZ-KA09NA, SUZ-KA12NA WIRING DIAGRAM
LEDLED
H
26H
IC802
IPM,IC932
L61
DB61,DB65
C62,C63
SYMBOL NAME SYMBOL SYMBOLNAME NAME
T801 21S4
X63,X64,X66
TB1,TB2
TR821
LEV
RT65 RT64
PTC64,PTC65
MC
RT62 RT61
MF
F701,F801,F901
RT68
NOTES:
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).
LED
2
RED 26H
BLKBLK
2
IC932
3
L1
L2
1
CN931
5
5
GROUND
From INDOOR UNIT CONNECTING WIRE
POWER SUPPLY 208/230V 1 phase 60Hz
TO INDOOR UNIT CONNECTING WIRES 208/230V 1 phase 60Hz
From INDOOR UNIT CONNECTING WIRES DC12-24V
LD63
F701 X64
PTC64
BLK
LD-E1
PTC65
LD-S
LD62
LD61
6
INVERTER P.C. BOARD
3
F901
BLU
CN721
X63
21
1
RT65
CN643
RT62
RT61
CN641
4
1
CIRCUIT BREAKER
BRN
BLU
BRN
RED
12
S3
S2
S1
TB2 TB1
RT64 RT68
CN642 CN644
2
1
CN932
L61
C62C63
LD70 LD66
DB61
DB65
+++
–
–
~ ~~ ~ +
TR821
F801 T801
1
3
P N
W
U V
IC802
3
1
V
W
MS 3~
MS
MF
3~ M
LEV
MC IPM
U
WHT
RED
BLK
3
1
RED
WHT
BLK
BLU YLW
ORN
LDW
LDV
LDU
CN61
6
CN724
1
21S4
11
2 2 1
(OPTION PARTS)
YLW
BLK BLK
BLK BLK
1H
BLK
CN722
3
1
X66
4
t° t° t° t° t°
SMOOTHING CAPACITOR DIODE MODULE FUSE (T3.15AL250V) DEFROST HEATER(OPTION PARTS) INTELLIGENT POWER DEVICE INTELLIGENT POWER MODULE REACTOR
EXPANSION VALVE COIL COMPRESSOR FAN MOTOR CIRCUIT PROTECTION DEFROST THERMISTOR DISCHARGE TEMP.THERMISTOR FIN TEMP.THERMISTOR AMBIENT TEMP.THERMISTOR
OUTDOOR HEAT EXCHANGER TEMP. THERMISTOR. TERMINAL BLOCK SWITCHING POWER TRANSISTOR TRANSFORMER RELAY REVERSING VALVE COIL HEATER PROTECTOR(OPTION PARTS)

6
7
SUZ-KA15NA
SUZ-KA15NA WIRING DIAGRAM
RT68
TB1,TB2
TR821
T801
21S4
X63,X64,X66
26H
F701,F801,F901
MF
RT61 RT62
MC
PTC64,PTC65
RT64
LEVC61,C62,C63
SYMBOL SYMBOL SYMBOLNAME NAME NAME
DB61,DB65
IC802
IPM,IC932
L61 RT65
H
LED LED
LED
2
RED
26H
BLKBLK
2
C61
INVERTER P.C. BOARD
F901
CN932
C62C63
LD70 LD66
DB61
DB65
––
~
~
~ ~
+
++ + +
TR821
F801
3
P N
W
U V
3
1
V
W
U
MS 3~
MS M 3~
MC
MF LEV
IPM
WHT
RED
BLK
3
1
RED
WHT
BLK
LDW
LDV
LDU
CN61
3
L1
L2
IC932
1
CN931
5
5
GROUND
From INDOOR UNIT CONNECTING WIRE
POWER SUPPLY 208/230V 1 phase 60Hz
TO INDOOR UNIT CONNECTING WIRES 208/230V 1 phase 60Hz
From INDOOR UNIT CONNECTING WIRES DC12-24V
LD63
F701 X64
PTC64
BLK
LD-E1
PTC65
LD-S
LD62
LD61
6
3
BLU
CN721
21
1
RT65
CN643
RT62
RT61
CN641
4
1
CIRCUIT BREAKER
BRN
BLU
BRN
RED
12
S3
S2
S1
TB2 TB1
RT64 RT68
CN642 CN644
2
1
L61
T801
1
IC802
BLU YLW
ORN
6
CN724
1
21S4
11
2 2 1
(OPTION PARTS)
YLW
BLK BLK
BLK BLK
1
H
BLK
CN722
3
1
X63
X66
4
t° t° t° t° t°
SMOOTHING CAPACITOR DIODE MODULE FUSE (T3.15AL250V) DEFROST HEATER(OPTION PARTS) INTELLIGENT POWER DEVICE INTELLIGENT POWER MODULE REACTOR
EXPANSION VALVE COIL
COMPRESSOR FAN MOTOR CIRCUIT PROTECTION DEFROST THERMISTOR DISCHARGE TEMP.THERMISTOR FIN TEMP.THERMISTOR AMBIENT TEMP.THERMISTOR
OUTDOOR HEAT EXCHANGER TEMP. THERMISTOR. TERMINAL BLOCK SWITCHING POWER TRANSISTOR TRANSFORMER RELAY REVERSING VALVE COIL HEATER PROTECTOR(OPTION PARTS)
NOTES:
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).

6
7
SUZ-KA18NA
RT68
TR821
TB1,TB2
X63,X64,X66
21S4
T801
HEATER PROTECTOR(OPTION PARTS)
26H
DB61,DB65
C61,C62,C63
SYMBOL NAME SYMBOL NAME SYMBOL NAME
DEFROST HEATER(OPTION PARTS)
L61
IC802
IPM, HC930
H
F701,F801,F901
LED
LED RT65
RT64
RT62
RT61
PTC64,PTC65
MF
MC
LEV
LED
11
2 2 1 2
(OPTION PARTS)
YLW
RED
BLK BLK
BLK BLK
26H
BLKBLK
2 1
H
BLK
CN722
3
1
X66
TO INDOOR UNIT CONNECTING WIRES 208/230V 1 phase 60Hz
GROUND
FROM INDOOR UNIT CONNECTING WIRE
BLU
FROM INDOOR UNIT CONNECTING WIRES DC12-24V
POWER SUPPLY 208/230V 1 phase 60Hz
11 1 1 1
52 3 2 4 1
INVERTER P.C. BOARD
CN931
5
21S4
CN724
6
CN61
LDU
LDV
LDW
ORN YLW
BLU
BLK
WHT
RED
1
3
BLK
RED
WHT
U
W
MC
MF LEV
MS
3~
MS M
3~
V
1
3
IC802
V U
IPM
WN
P
31
HC930
T801
F801
TR821
DB65 DB61
LD66
LD70
C63 C62 C61
L61
CN932 CN644CN642
RT68
RT64
L2
L1
TB1 TB2
S1
S2
S3
BRN
2
1
RED
BRN
BLU
CIRCUIT BREAKER
CN641
RT61 RT62
CN643
RT65
3
X63
CN721
F901
6
LD61 LD62 LD-S
PTC65 LD-E1
BLK
PTC64
X64
F701
LD63
NOTES: 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).
~
–
+++ + +
–
~ ~
~
t° t° t° t° t°
4
REACTOR DIODE MODULE
EXPANSION VALVE COIL COMPRESSOR
SMOOTHING CAPACITOR FUSE (T3.15AL250V) INTELLIGENT POWER DEVICE INTELLIGENT POWER MODULE
FAN MOTOR
CIRCUIT PROTECTION DEFROST THERMISTOR
DISCHARGE TEMP.THERMISTOR
FIN TEMP.THERMISTOR AMBIENT TEMP.THERMISTOR
OUTDOOR HEAT EXCHANGER
TEMP. THERMISTOR.
TERMINAL BLOCK
SWITCHING POWER TRANSISTOR
TRANSFORMER
RELAY
REVERSING VALVE COIL
SUZ-KA18NA WIRING DIAGRAM

8 9
Unit: inch (mm)
SUZ-KA09NA
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø3/8
(with heat insulator)
Refrigerant pipe ø1/4
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
O.D. 0.118 ×I.D. 0.079
×9-7/16
(ø3.0 × ø2.0 ×240)
Outdoor heat
exchanger
temperature
thermistor
RT68
Service port
Service port
Muffler
SUZ-KA12NA SUZ-KA15NA
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø3/8 (KA12)
Refrigerant pipe ø1/2 (KA15)
(with heat insulator)
Refrigerant pipe ø1/4
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
Capillary tube
O.D. 0.118 × I.D. 0.071
× 23-5/8
(ø 3.0 × ø 1.8 × 600 ) (×2)
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
O.D. 0.118 ×I.D. 0.079
×9-7/16
(ø3.0 × ø2.0 ×240)
Outdoor heat
exchanger
temperature
thermistor
RT68
Muffler
Service port
Service port
6REFRIGERANT SYSTEM DIAGRAM
Unit: inch (mm)

8 9
SUZ-KA18NA
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Capillary tube
O.D. 0.142 × I.D. 0.094
× 1-31/32
(ø 3.6 × ø 2.4 × 50) Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø 1/2
(with heat insulator)
Refrigerant pipe ø 1/4
(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
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-KA09/12/15NA 65 40 3/8 (KA09/12)
1/2 (KA15) 1/4
SUZ-KA18NA 100 50 1/2
Unit: inch (mm)

10 11
ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)
Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model Outdoor unit
precharged Refrigerant piping length (one way): ft.
25 30 40 50 60 65
SUZ-KA09NA 1 lb. 16 oz. 0 1.62 4.86 8.10 11.34 12.96SUZ-KA12NA 2 lb. 9 oz.
SUZ-KA15NA Calculation: X oz. = 1.62/5 oz. / ft. × (Refrigerant piping length (ft.) - 25)
Model Outdoor unit
precharged Refrigerant piping length (one way): ft.
25 30 40 50 60 70 80 90 100
SUZ-KA18NA 3 lb. 16 oz. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20
Calculation: X oz. = 1.08/5 oz. / ft. × (Refrigerant piping length (ft.) - 25)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.