Mitsubishi Electric SUZ-KA18NA2 User manual

SERVICE MANUAL R410A
Outdoor unit
[Model Name]
SUZ-KA18NA2
SUZ-KA18NAH2
SUZ-KA24NA
SUZ-KA24NAH2
SUZ-KA30NA
SUZ-KA30NAH2
SUZ-KA36NA
SUZ-KA36NAH2
[Service Ref.]
SUZ-KA18NA2.TH
SUZ-KA18NAH2.TH
SUZ-KA24NA2.TH
SUZ-KA24NAH2.TH
SUZ-KA30NA2.TH
SUZ-KA30NAH2.TH
SUZ-KA36NA2.TH
SUZ-KA36NAH2.TH
PARTS CATALOG (OCB688)
Note:
• This manual describes service
data of the outdoor units only.
No. OCH688
REVISED EDITION-D
June 2021
SPLIT-TYPE, AIR CONDITIONERS
SUZ-KA18NA(H)2.TH
Revision:
•Some descriptions have
been modified in REVISED
EDITION-D.
OCH688C is void.
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 ······ 9
7. DATA ······················································· 11
8. ACTUATOR CONTROL·························· 14
9. SERVICE FUNCTIONS··························· 15
10. TROUBLESHOOTING···························· 15
11. FUNCTION SETTING ····························· 32
12. DISASSEMBLY INSTRUCTIONS··········· 35

2
OCH688D
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-KA18NA(H)2.TH SUZ-KA24NA(H)2.TH SUZ-KA30NA(H)2.TH SUZ-KA36NA(H)2.TH
Heat pump type
Outdoor unit
SUZ-
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Indoor unit
Service
Manual No.
Service Ref.
Heat pump without
electric heater
OCH669
OCB669
KA18NA(H)2.TH
—
—
—
—
—
—
—
—
—
—
—
—
—
PEAD-A18AA7.MX
PEAD-A24AA7.MX
PEAD-A30AA7.MX
PEAD-A36AA7.MX
SVZ-KP18NA.MX
SVZ-KP24NA.MX
SVZ-KP30NA.MX
SVZ-KP36NA.MX
MLZ-KP18NA
MD-1404-K019
MD-1404-K018
KA24NA(H)2.TH KA30NA(H)2.TH KA36NA(H)2.TH
HWE08020
BWE10180
OBH802
OBB802
HWE16080
BWE016290
—
—
—
—
—
—
SEZ-KD18NA4.TH
SLZ-KF18NA.TH

3
OCH688D
Outdoor unit model SUZ-KA18
NA(H)2
SUZ-KA24
NA(H)2
SUZ-KA30
NA(H)2
SUZ-KA36
NA(H)2
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 SNB130FQBMT SNB220FQGM1T
R.L.A 10.0 13.0
L.R.A 12.5 16.0
Refrigeration oil oz. (Mod-
el) 11.8(FV50S) 15.6(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 127 129
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) 3/8(0.0285)
Gas in 1/2 (0.0285) 5/8(0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units
Height difference ft 50 100
Piping length ft 100
Refrigerant charge (R410A) 3 lb. 9 oz. 4 lb. 14 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

OCH688D 4
Unit: inch
SUZ-KA18NA(H)2.TH SUZ-KA24NA(H)2.TH SUZ-KA30NA(H)2.TH SUZ-KA36NA(H)2.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 (KA18)
Refrigerant pipe (flared) Ø 3/8 (KA24/30/36)
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø 1/2 (KA18)
Refrigerant pipe (flared) Ø 5/8 (KA24/30/36)
*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

OCH688D 5
SUZ-KA18NA2.TH
5WIRING DIAGRAM
4
W
W
W
4