Mitsubishi Electric SUY-SA18VA.TH-T Operating manual

TECHNICAL & SERVICE MANUAL
No.OCH649
SPLIT-TYPE, AIR CONDITIONERS
R410A
Outdoor unit
[Model Name] [Service Ref.]
SUY-SA18VA SUY-SA18VA.TH-T
SUY-SA24VA SUY-SA24VA.TH-T
SUY-SA30VA SUY-SA30VA.TH-T
SUY-SA36VA SUY-SA36VA.TH-T
CONTENTS
1. REFERENCE MANUAL .................................... 2
2. TECHNICAL CHANGES ................................... 3
3. PARTS NAMES AND FUNCTIONS .................. 7
4. SPECIFICATION................................................ 8
5. NOISE CRITERION CURVES ......................... 10
6. OUTLINES AND DIMENSIONS .......................11
7. WIRING DIAGRAM.......................................... 13
8. REFRIGERANT SYSTEM DIAGRAM ............. 15
9. ACTUATOR CONTROL................................... 18
10. TROUBLESHOOTING..................................... 19
11. DISASSEMBLY PROCEDURE........................ 35
Indication of
model name
Note:
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utilized
R410A
October 2016
PARTS CATALOG (OCB649)

2
1REFERENCE MANUAL
1-1. INDOOR UNIT SERVICE MANUAL
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OCH649

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3PARTS NAMES AND FUNCTIONS
SUY-SA18VA.TH-T
SUY-SA24VA.TH-T
SUY-SA30VA.TH-T
SUY-SA36VA.TH-T
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
OCH649

8
SPECIFICATION
4
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OCH649

11
6OUTLINES AND DIMENSIONS
Drain hole
ø
42 (In case of Heater models
ø
33)
Bolt pitch for
installation
Oval holes 2-10×21
Air in
Air in
Air out
40
304-325
285
44
400
17.5
344.5
L-Bend condenser models
Handle
Bolt pitch for installation
22.3
550
280
10
500150
302.5
800
69
Service port
Gas refrigerant pipe joint
Liquid refrigerant pipe joint
Service panel
23
170.5
99.5
164.5
35
°
43
°
100mm or more 350mm or more
Basically open
100mm or more without any obstruction
in front and both sides of the unit
REQUIRED SPACE
100mm or more
200mm or more. Open 2 sides of left, right, or rear side
Flared Flared
Refrigerant pipe joint
Liquid refrigerant pipe
Gas refrigerant pipe
Model name SUY-SA18VA.TH-T
12.7(1/2 inch)
6.35(1/4 inch)
Unit: mm
SUY-SA18VA.TH-T
OCH649

12
452
880
840 81
109
Service port
Gas refrigerant pipe joint
Liquid refrigerant pipe joint
Service panel
195
99.5 65
35
°
44
°
Drainage hole
Bolt pitch for
installation
Bolt pitch for installation
Air out
Air in
Air in
2-holes 10×21
50
417.5
175 500
330
360
40
ø
42
100mm or more
200mm or more if
there are obstacles to both sides
REQUIRED SPACE
350mm or more100mm or more
Open as a rule
500mm or more if
the front and both
sides are open
Open as a rule 500mm or more if the back,
both sides and top are open
Flared
Refrigerant pipe joint
Liquid refrigerant pipe
Gas refrigerant pipe
Model name SUY-SA24VA.TH-T
SUY-SA30VA.TH-T SUY-SA36VA.TH-T
Flared
15.88(5/8 inch)
9.52(3/8 inch)
SUY-SA24VA.TH-T
SUY-SA30VA.TH-T
SUY-SA36VA.TH-T
Unit: mm
OCH649

1313
7WIRING DIAGRAM
M
tº tº tºtº
12-24V
220V ~
FIN TEMP. THERMISTOR OUTDOOR HEAT EXCHANGER TEMP. THERMISTOR TERMINAL BLOCK TRANSFORMER RELAY
NAME
RT64 RT68 TB T801 X64
SYMBOL
EXPANSION VALVE COIL REACTOR COMPRESSOR FAN MOTOR CIRCUIT PROTECTION LIQUID PIPE TEMP. THERMISTOR DISCHARGE TEMP. THERMISTOR
NAME
LEV L61 MC MF PTC64. PTC65 RT61 RT62
SYMBOL
SMOOTHING CAPACITOR DIODE MODULE FUSE (T20AL250V) FUSE (T3.15AL250V) POWER MODULE POWER DEVICE LED
NAME
C61, C62, C63
DB61 F61 F801, F901 IC700, IC820, IC932 IC802 LED
SYMBOL
INVERTER P.C. BOARD
LED
CN644CN641CN641CN643CN931
NOTES: 1. About the indoor side electric
wiring refer to the indoor unit electric wiring diagram for servicing.
CN932
IC932
F901 F801
T801
IC802
MS
3~
LEV
CN724
RT61 RT62 RT68
L61
MC
MF
X64
LD61
LD71 PTC65
PTC64
LD62
LD-E1
LD63
LD-S
LD66B
F61
RT64
CN642
NU
V
W
W
V
U
RD
WH
BK
RD
WH
BK
CN61
3 1
3 1
LDW LDV LDU
U
V
W
P
N
IC700
IC820
OG BN
WH
DB61
LD70 LD66A
C63 C62 C61
+ + +
+
-
~ ~
P
3 1
1 2
1 2 45 1 11 1 63
3 5
3
YE
BN
BK
S1 S2 S3
L N
CIRCUIT BREAKER
BN BU RD BN BU TB
POWER SUPPLY
1 phase ~
220V 50Hz
TO INDOOR UNIT
MS
3~
SUY-SA18VA.TH-T
SUY-SA24VA.TH-T
OCH649

14
TRANSFORMER TERMINAL BLOCK RELAY
SMOOTHING CAPACITOR FUSE(T3.15AL250V) FUSE(T3.15AL250V) IGBT Module DIODE Module IGBT Module
REACTOR COMPRESSOR FAN MOTOR LED CIRCUIT PROTECTION EXPANSION VALVE COIL
LIQUID PIPE TEMP. THERMISTOR CIRCUIT PROTECTION TEMP. THERMISTOR OUTDOOR HEAT EXCHANGER FIN TEMP. THERMISTOR DISCHARGE TEMP. THERMISTOR
NOTE: About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing.
TB1,TB2 T801 X64
SYMBOL
L LED LEV MC MF PTC64
SYMBOL
CB1~3 F880 F901 IC700 IC820 IC932
SYMBOL
NAMENAME NAMENAME
PTC65 RT61 RT62 RT64 RT68
SYMBOL
BK
RT64RT62
RT61 RT68 LEV
CN671 CN672 CN673
2
1
t°t° t°t°
6
CN724
1
CN931
15 3 1
CN932
IC932
BK
PTC64
PTC65
2
L
34
1
RD
4
YE
TAB64
TAB62
IC820
TAB6
RD
YE
TAB5
R S
LD9
T801
INVERTER P.C. BOARD
LED
P N
CB1
+
CB2
+ +
TAB7 TAB8TAB9
IC700
U
V W
P
N
CB3
WH RD BK
V
W
UMC
1 1 3 3
RD WH BK
F901F880
8
MF
TAB61
X64
LDE2 LDE1
TB2
12-24V
220V~
TABS3
BU
WH
BN
TB1
CIRCUIT BREAKER
GNYE
POWER SUPPLY
1 phase ~ 220V 50Hz
TO INDOOR UNIT
2
1
6
1
BU
RD
BK
M
3~
MS
3~
MS
S2 S3 S1
L
N
SUY-SA30VA.TH-T
SUY-SA36VA.TH-T
OCH649

1515
REFRIGERANT SYSTEM DIAGRAM
8
Unit: mm
SUY-SA18VA.TH-T
Unit: mm
SUY-SA24VA.TH-T
SUY-SA30VA.TH-T
Flared connection
Discharge
temperature
thermistor
(RT62)
Flared connection
Stop valve(L)
(with strainer(#100))
Stop valve(G)
(with service port)
Refrigerant flow in cooling
Compressor
Refrigerant pipe ø12.7 (1/2")
Refrigerant pipe ø6.35 (1/4")
Strainer
#50
Strainer
#100
Strainer
#50×2
Liquid pipe
temperature
thermistor
(RT61)
Capillary tube
ø3.0×ø1.8×600(×2)
Outdoor heat
exchanger
temperature
thermistor
(RT68)
Muffler
Outdoor
heat
exchanger
LEV
Capillary tube
ø4.0×ø2.4×240
Flared connection
Discharge
temperature
thermistor
(RT62)
Flared connection
Stop valve(L)
Stop valve(G)
(with service port)
Refrigerant flow in cooling
Compressor
Refrigerant pipe ø15.88 (5/8")
Refrigerant pipe ø9.52 (3/8")
Strainer
#50
Strainer
#100
Strainer
#100
Capillary tube
ø4.0×ø2.4×100
Outdoor heat
exchanger
temperature
thermistor
(RT68)
Muffler(#100)
Outdoor
heat
exchanger
LEV
Liquid pipe
temperature
thermistor
(RT61)
OCH649

16 
Unit: mm
SUY-SA36VA.TH-T
Flared connection
Discharge
temperature
thermistor
(RT62)
Flared connection
Stop valve(L)
Stop valve(G)
(with service port)
Refrigerant flow in cooling
Compressor
Refrigerant pipe ø15.88 (5/8")
Refrigerant pipe ø9.52 (3/8")
Strainer
#50
Strainer
#100
Strainer
#100
Capillary tube
ø4.0×ø2.4×100
Outdoor heat
exchanger
temperature
thermistor
(RT68)
Muffler(#100)
Outdoor
heat
exchanger
LEV
Liquid pipe
temperature
thermistor
(RT61)
OCH649


ADDITIONAL REFRIGERANT CHARGE (R410A: g)
MAX. REFRIGERANT PIPING LENGTH
Max. Length
A
* Height difference limitations are binding regardless of which unit, indoor or outdoor, is position high.
* Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. HEIGHT DIFFERENCE
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SUY-SA18VA.TH-T 20
12  
SUY-SA24VA.TH-T
30 15  SUY-SA30VA.TH-T
SUY-SA36VA.TH-T
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SUY-SA24VA.TH-T 2,000
0 60 160 260 360 460SUY-SA30VA.TH-T 2,100
SUY-SA36VA.TH-T 2,500
OCH649

18
ACTUATOR CONTROL
9
SUY-SA18VA.TH-T SUY-SA24VA.TH-T
SUY-SA30VA.TH-T SUY-SA36VA.TH-T
9-2. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
ON
OFF
ON
OFF
Outdoor fan
Compressor
5 seconds 15 seconds
9-1. OUTDOOR FAN MOTOR CONTROL
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OCH649