Mitsubishi Electric SVZ-KP18NA User manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
No.TCH022
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....................................15
9. SERVICE FUNCTION.......................................16
10. TROUBLESHOOTING......................................16
11. FUNCTION SETTING....................................... 34
12. DISASSEMBLY INSTRUCTIONS.....................37
HFC
utilized
R410A
February 2018
R410A
Outdoor unit
[Model names] [Service Ref.]
SUZ-KA09NA SUZ-KA09NAR1.TH
SUZ-KA09NAR1.TH H
SUZ-KA12NA SUZ-KA12NAR1.TH
SUZ-KA12NAR1.TH H
SUZ-KA15NA SUZ-KA15NAR1.TH
SUZ-KA15NAR1.TH H
SUZ-KA18NA SUZ-KA18NAR1.TH
SUZ-KA18NAR1.TH H
Note:
This service manual describes
service data of the outdoor units
only.
•
RoHS compliant products have
<G> mark on the spec name plate.
PARTS CATALOG (TCB022)
SUZ-KA18NAR1.TH
SUZ-KA18NAR1.TH H

2
TCH022
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
OUTDOOR UNIT
Indoor unit
Outdoor unit
Heat pump type
SUZ-
Service Ref. Service
Manual No.
KA09NAR1.TH
KA09NAR1.TH H
KA12NAR1.TH
KA12NAR1.TH H
KA15NAR1.TH
KA15NAR1.TH H
KA18NAR1.TH
KA18NAR1.TH H
Heat pump without electric heater
SLZ-KA09NA OCH487B
OCB487B
○
---
SLZ-KA12NA -
○
--
SLZ-KA15NA --
○
-
SEZ-KD09NA
HWE0802B
BWE0801A
○
---
SEZ-KD12NA -
○
--
SEZ-KD15NA --
○
-
SEZ-KD18NA ---
○
PEAD-A09AA7
HWE1608A
○
---
PEAD-A12AA7
-
○
--
PEAD-A15AA7
--
○
-
PEAD-A18AA7
---
○
SVZ-KP12NA
MD-1404-K019
-
○
--
SVZ-KP18NA ---
○

3
TCH022
Outdoor unit model SUZ-KA09NA SUZ-KA12NA SUZ-KA15NA SUZ-KA18NA
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 63.6 73 75.5 116.5
External finish 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˚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
TCH022
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

5
TCH022
SUZ-KA09NA SUZ-KA12NA
5WIRING DIAGRAM

6
TCH022
SUZ-KA15NA

7
TCH022
SUZ-KA18NA

8
TCH022
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)

9
TCH022
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)
*Height difference limitations are binding regardless of the height position at which either indoor or outdoor is placed higher.

10
TCH022
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 12.96
SUZ-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.