Mitsubishi Electric MS-GK24VA User manual

Models
MS-GK24VA -KU1 , KU2 , KU2 U
MS-GK30VAT -KU1 , KU2 , KU2 U
MS-GK36VAT -KU1 , KU2 , KU2 U
Outdoor unit service manual
MU-GK∙VA(T) Series (OBH735)
INDOOR UNIT
PARTS CATALOG (OBB734)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
TM
SERVICE MANUAL
No. OBH734
REVISED EDITION-B
MS-GK24VA
MS-GK30VAT
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS··················3
3. SPECIFICATION ········································5
4. OUTLINES AND DIMENSIONS·····················6
5. WIRING DIAGRAM·····································8
6. REFRIGERANT SYSTEM DIAGRAM ·············9
7. SERVICE FUNCTIONS······························ 11
8. MICROPROCESSOR CONTROL ················ 13
9. TROUBLESHOOTING······························· 21
10. DISASSEMBLY INSTRUCTIONS················· 36
Revision B:
• MS-GK24VA- KU2 U, MS-GK30/36
VAT-
KU2 Uhave been added.
OBH734 REVISED EDITION-A is void.

2
Revision A:
• MS-GK24VA- KU2 , MS-GK30/36VAT- KU2 have been added.
Revision B:
• MS-GK24VA- KU2 U, MS-GK30/36VAT- KU2 Uhave been added.
MS-GK24VA- KU1
MS-GK30VAT- KU1
MS-GK36VAT- KU1
1. New model
MS-GK24VA- KU1 MS-GK24VA- KU2
MS-GK30VAT- KU1 MS-GK30VAT- KU2
MS-GK36VAT- KU1 MS-GK36VAT- KU2
1. The model name has been changed so as to correspond to standard.
MS-GK24VA- KU2 MS-GK24VA- KU2 U
MS-GK30VAT- KU2 MS-GK30VAT- KU2 U
MS-GK36VAT- KU2 MS-GK36VAT- KU2 U
1. The model name has been changed so as to correspond to standard.
2. Remote controller has been changed. (The setting temperature range has been changed.)
TECHNICAL CHANGES
1
Use the specified refrigerant only
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by
failure to follow the instructions.
OBH734B

3
PART NAMES AND FUNCTIONS
2
ACCESSORIES
MS-GK24VA MS-GK30VAT
Horizontal vane
Air outlet
Air filter
(Nano platinum filter)
Air inlet
Front panel
Air cleaning filter
(Electrostatic anti-allergy
enzyme filter, option)
Remote controller
Display section
Heat exchanger
Operation indicator lamp
Remote control receiving section
Emergency operation switch
Model MS-GK24VA
MS-GK30VAT
Installation plate 1
Installation plate fixing screw 4 × 25 mm 7
Remote controller holder 1
Fixing screw for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
OBH734B

4
MS-GK36VAT
Display section
Remote controller
Operation indicator
lamp
Remote control
receiving section
Emergency operation
switch
Horizontal vane
Air outlet
Air ¿lter
(Catechin air ¿lter)
Air inlet
Front panel
Air cleaning ¿lter
(Anti-Allergy
Enzyme Filter, option)
Installation plate
Installation plate fixing screw 4 x 25 mm
Remote controller holder
Screw for 3.5 x 16 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
Charge nut
L-Joint pipe
1
7
1
2
2
1
2
1
1
ACCESSORIES
OBH734B

5
SPECIFICATION
3
Indoor model MS-GK24VA MS-GK30VAT MS-GK36VAT
Function Cooling
Power supply Single phase 220 - 230 - 240 V, 50 Hz
Electrical
data
Running current A 0.53 0.56 0.52
Power input W 62 66 70
Fan motor
Model RC0J50-MA RC0J56-AC
Current A 0.53 0.56 0.52
Dimensions W × H × D mm 1,100 x 325 x 238 1,170 x 365 x 295
Weight kg 16 16 18
Special remarks
Air direction 5
Airflow
Super High
m3/h
1,320 1,296 -
High 1,122 1,134 1,392
Med. 930 972 1,146
Low 744 828 924
Sound level
Super High
dB (A)
53 -
High 47 50
Med. 42 44
Low 37 39
Fan speed
Super High
rpm
1,290 1,340 -
High 1,130 1,200 1,100
Med. 970 1,060 940
Low 810 930 790
Fan speed regulator 4 3
Remote controller model
KU1 , KU2 : KM14A KU1 , KU2 : KM15G
KU2 U: KM17C KU2 U: KM17B
NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27 Wet-bulb temperature 19
Outdoor Dry-bulb temperature 35 Wet-bulb temperature 24
Indoor-Outdoor piping length: 5 m
OBH734B

6
Unit: mm
OUTLINES AND DIMENSIONS
4
MS-GK24VA
MS-GK30VAT
1090 5
1100
45 238.5
258.5
3
280
225 225
129
239.5
281
44
49.5 500.5 439.5
199.5199.5 110.5
65
63 76 843 181
65
65 30
63
65
67
63
325
3
100
125
160
110
( 70° )
238
5
210
21.5
184
12
Piping
Insulation
MS-GK24VA Ø50 O.D
Liquid line Ø9.52 - 0.5m (Flared connection Ø6.35)
Gas line Ø12 - 0.45m (Flared connection Ø15.88)
Drain hose Insulation Ø28 Connected part Ø16 O.D
Piping
Insulation
MS-GK30VATØ50 O.D
Liquid line Ø9.52 - 0.5m (Flared connection Ø9.52)
Gas line Ø12 - 0.45m (Flared connection Ø15.88)
Drain hose Insulation Ø28 Connected part Ø16 O.D
Air out
Piping
Drain hose
11×26 Oblong hole 11×20 Oblong hole
Installation plate
Indoor unit
Wall hole Ø 75
Air in Installation plate
159
19
58
OBH734B

7
Unit: mm
MS-GK36VAT
159
19
58
Wireless remote controller
Required Space (Indoor Unit)
In case of left, left back,
or left under piping (using spacer) 130 or more
Piping Insulation
Insulation 28 Connected part 16 O.D
Drain hose
Indoor unit
Drain hose
Piping
Installation plate
Air out
Air in
Wall hole 75
15.88 - 0.4m
Joint connection 15.88-0.4m
Flared connection 19.05
9.52 - 0.5m
(Flared connection 9.52) 31 O.D
15 I.D
50 O.D
32 I.D
85574 241
150.5
65
1155
1170
365
67.7
47
55 531 449 136
2.5
47 296 22
119.5
66
75
120 or more 220 or more
107.3 or more
10 or more
236.5 or more
55 or more 368 or more
72 or more
5
295
Liquid line
Gas line
OBH734B

8
WIRING DIAGRAM
5
MS-GK24VA- KU1 , KU2 , KU2 UMS-GK30VAT- KU1 , KU2 , KU2 U
MS-GK36VAT- KU1
MS-GK36VAT- KU2 , KU2 U
OBH734B

9
Unit: mm
REFRIGERANT SYSTEM DIAGRAM
6
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø15.88
(with heat insulator)
Refrigerant pipe ø9.52
(with heat insulator)
Indoor coil
thermistor
RT12
Refrigerant flow in cooling
MS-GK30VAT
MS-GK24VA
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø15.88
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12
Refrigerant flow in cooling
OBH734B

10
MS-GK36VAT
Indoor
heat
exchanger
Joint
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13 (SUB)
Flared connection
Refrigerant pipe
19.05
(with heat insulator)
Refrigerant pipe
9.52
(with heat insulator)
Indoor coil
thermistor
RT12 (MAIN)
Strainer
#50
Joint connection
Flared connection
Refrigerant flow in cooling
OBH734B