Mitsubishi Electric MSZ-A18YV User manual

SERVICE MANUAL
CONTENTS
1. PART NAMES AND FUNCTIONS······················2
2. SPECIFICATION·················································4
3. NOISE CRITERIA CURVES·······························5
4. OUTLINES AND DIMENSIONS ·························6
5. WIRING DIAGRAM ············································7
6. REFRIGERANT SYSTEM DIAGRAM················8
7. SERVICE FUNCTIONS ······································9
8. TROUBLESHOOTING······································11
9. DISASSEMBLY INSTRUCTIONS ····················19
10. PARTS LIST······················································21
11. OPTIONAL PARTS···········································23
Wireless type
Models
MSZ-A18YV -
MSZ-A24YV -
MSZ-A26YV - E1
E1
E1
No. OB345
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
MSZ-A18YV -
MSZ-A24YV -
MSZ-A26YV - E1
E1
E1
Indication of model name
NOTE:
This service manual describes technical data of the indoor unit.
•Refer to the service manual OB346 when MSZ-A18YV - , MSZ-A24YV - or MSZ-A26YV -
is connected with MUZ-A18YV - , MUZ-A24YV - or MUZ-A26YV - .
•Refer to the service manual OB319 when MSZ-A18YV - , MSZ-A24YV - or MSZ-A26YV -
is connected with MXZ-A26WV - or MXZ-A32WV - as multi system units.
E1E1
E1E1E1
E1E1E1
E1E1E1
OB345-1.qxp 04.4.22 11:43 AM Page 1

PART NAMES AND FUNCTIONS
2
1
INDOOR UNIT
Grille
(When the grille is opened)
Remote controller
Operation section Display section
Emergency operation switch
Operation indicator lamp
Air inlet
To Breaker
Power supply cord
Remote control
receiving section
Air cleaning filter (option)
(White bellows type)
Horizontal vane
Vertical vanes
Catechin air filter
Remote control
receiving section
MSZ-A18YV -
MSZ-A24YV -
MSZ-A26YV - E1
E1
E1
ACCESSORIES
Indoor unit
1
2
3
4
5
6
7
Installation plate
Installation plate fixing screw 4 o25 mm
Remote controller holder
Fixing screw for 3o3.5 o1.6 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
1
7
1
2
2
1
1
MSZ-A18YV -
MSZ-A24YV -
MSZ-A26YV -
E1
E1
E1
OB345-1.qxp 04.4.22 11:43 AM Page 2

REMOTE CONTROLLER
MSZ-A18YV -
MSZ-A24YV -
MSZ-A26YV - E1
E1
E1
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
ON/OFF
FAN
TOO
WARM TOO COOL
VANE
MODE
ECONO COOL
STOP
START
HR.
MIN.
WIDE VANE
LONG
I FEEL COOL
HEAT
DRY
PM
CLOCK
AM
RESET CLOCK
Open the front lid.
Signal transmitting section
Operation display section
OPERATE /STOP
(ON /OFF)button
TEMPERATURE buttons
OPERATION SELECT button
FAN SPEED CONTROL button
OFF-TIMER button
HR. button
MIN. button
(TIME SET button)
ON-TIMER button
RESET button
ECONO COOL button
VANE button
(Horizontal vane button)
CLOCK SET button
LONG button
WIDE VANE button
(Vertical vane button)
Indication of remote controller
model is on back.
3
OB345-1.qxp 04.4.22 11:43 AM Page 3

SPECIFICATION
4
2
Indoor model
Function
Power supply
Air flow
(High/Med. /Low )
Power outlet
Running current
✽1
Power input ✽1
Auxiliary heater
Power factor
✽1
Fan motor current ✽1
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Air direction
Sound level(High/Med. /Low )
Fan speed(High/Med. /Low )
Fan speed regulator
Thermistor RT11(at 25:)
Thermistor RT12(at 25:)
Thermistor RT13(at 25:)
Remote controller model
K/h
A
A
W
A(kW)
%
A
"
mm
kg
dB
rpm
k"
k"
k"
MSZ-A18YV - E1
Single phase
230V, 50Hz
852/690 /498
10
0.30
60
—
87
0.30
RC4V32-AA
WHT-BLK 293
BLK-RED 146
1,100O325O258
16
5
43/38 /31
1,120/940 /720
3
10
10
10
KP0A
Cooling
Heating
MSZ-A24YV - E1
Single phase
230V, 50Hz
10
0.34
69
—
87
0.34
RC4V40-AA
WHT-BLK 138.2
BLK-RED 159.0
1,100O325O258
16
5
48/40 /32
3
10
10
10
KP0A
Cooling
1,032/768 /522
1,310/1030 /750
Heating
1,032/786 /522
1,310/1050 /750
Electrical data
Fan motor
Special remarks
Capacity
ww
ww
ww
ww
ww
ww
ww
ww
ww
ww
ww
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C Wet-bulb temperature(24°C)
Heating : Indoor Dry-bulb temperature 20°C Wet-bulb temperature 15.5°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
Indoor-Outdoor piping length 5m
wReference value
✽1 Measured under rated operating frequency.
Indoor model
Function
Power supply
Air flow
(High/Med. /Low )
Power outlet
Running current
✽1
Power input ✽1
Auxiliary heater
Power factor
✽1
Fan motor current ✽1
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Air direction
Sound level(High/Med. /Low )
Fan speed(High/Med. /Low )
Fan speed regulator
Thermistor RT11(at 25:)
Thermistor RT12(at 25:)
Thermistor RT13(at 25:)
Remote controller model
K/h
A
A
W
A(kW)
%
A
"
mm
kg
dB
rpm
k"
k"
k"
MSZ-A26YV - E1
Single phase
230V, 50Hz
10
0.34
69
—
88
0.34
RC4V40-AA
WHT-BLK 138.2
BLK-RED 159.0
1,100O325O258
16
5
48/40 /33
3
10
10
10
KP0A
Cooling
1,032/798 /564
1,310/1,060 /800
Heating
1,032/816 /564
1,310/1,080 /800
Electrical data
Fan motor
Special remarks
Capacity
ww
ww
ww
ww
ww w
ww
ww
w
•Refer to the service manual OB346 when MSZ-A18YV - , MSZ-A24YV - or MSZ-A26YV - is connected with
MUZ-A18YV - , MUZ-A24YV - or MUZ-A26YV - .
•Refer to the service manual OB319 when MSZ-A18YV - , MSZ-A24YV - or MSZ-A26YV - is connected with
MXZ-A26WV - or MXZ-A32WV - as multi system units.
E1E1
E1E1E1
E1E1E1
E1E1E1
OB345-1.qxp 04.4.22 11:44 AM Page 4

5
NOISE CRITERIA CURVES
3
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
43
SPL(dB(A)) LINE
High
FAN SPEED
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
MSZ-A18YV - E1 MSZ-A24YV -
MSZ-A26YV - E1
E1
2.5+ 440V
250V 3.15A
MP20/MP20
TNR10V511K410
S201DH1N
3P
INDOOR UNIT
Item Model
Indoor fan capacitor
Fuse
Vane motor
Varistor
Solid state relay
Terminal block
Indoor fan motor thermal fuse
(C11)
(F11)
(MV1/ MV2)
(NR11)
(SR141)
(TB)
MSZ-A24YV - E1
MSZ-A18YV - E1 MSZ-A26YV - E1
145:
Specifications and rating conditions of main electric parts
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
48
SPL(dB(A)) LINE
High
FAN SPEED
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:
INDOORUNIT WALL
MICROPHONE
0.8m
1m
OB345-1.qxp 04.4.22 11:44 AM Page 5