Mitsubishi Electric MSZ-SF25VE User manual

CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. NOISE CRITERIA CURVES ······························ 6
5. OUTLINES AND DIMENSIONS ························ 7
6. WIRING DIAGRAM············································ 8
7. REFRIGERANT SYSTEM DIAGRAM ··············· 9
8. SERVICE FUNCTIONS ··································· 10
9. MICROPROCESSOR CONTROL ··················· 12
10. TROUBLESHOOTING····································· 18
11. DISASSEMBLY INSTRUCTIONS ···················· 31
SPLIT-TYPE AIR CONDITIONERS
SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OBB600)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Models
MSZ-SF25VE -
E1
MSZ-SF35VE -
E1
MSZ-SF25VE -
E2
MSZ-SF35VE -
E2
MSZ-SF42VE -
E1
MSZ-SF50VE -
E1
MSZ-SF42VE -
E2
MSZ-SF50VE -
E2
MSZ-SF25VE -
EN1
MSZ-SF35VE -
EN1
MSZ-SF25VE -
EN2
MSZ-SF35VE -
EN2
MSZ-SF42VE -
EN1
MSZ-SF50VE -
EN1
MSZ-SF42VE -
EN2
MSZ-SF50VE -
EN2
No. OBH600
REVISED EDITION-B
Revision B:
• "How to check miswiring and serial signal error"
for MUZ type has been added.
• The description about "Low standby power
control" has been added to "TECHNICAL
CHANGES".
Please void OBH600 REVISED EDITION-A.
Outdoor unit service manual
MUZ-SF·VE(H) Series (OBH629)
MXZ-C·VA Series (OB584)
MXZ-D·VA Series (OBH626)
MXZ-8B Series (OCH480)

2
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
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.
Revision A:
• MSZ-SF25/35/42/50VE- E2 and MSZ-SF25/35/42/50VE- EN2 have been added.
Revision B:
• "How to check miswiring and serial signal error" for MUZ type has been added.
• The description about "Low standby power control" has been added to "TECHNICAL CHANGES".
OBH600B

3
TECHNICAL CHANGES
1
MSZ-SF25VE- E1 MSZ-SF25VE-EN1
MSZ-SF35VE- E1 MSZ-SF35VE-EN1
MSZ-SF42VE- E1 MSZ-SF42VE-EN1
MSZ-SF50VE- E1 MSZ-SF50VE-EN1
1. New model
MSZ-SF25VE- E1 MSZ-SF25VE- E2 MSZ-SF25VE-EN1 MSZ-SF25VE-EN2
MSZ-SF35VE- E1 MSZ-SF35VE- E2 MSZ-SF35VE-EN1 MSZ-SF35VE-EN2
MSZ-SF42VE- E1 MSZ-SF42VE- E2 MSZ-SF42VE-EN1 MSZ-SF42VE-EN2
MSZ-SF50VE- E1 MSZ-SF50VE- E2 MSZ-SF50VE-EN1 MSZ-SF50VE-EN2
1. Indoor electronic control P.C. board has been changed.
E2 and EN2 models are compatible with the outdoor units with low standby power control.
Connecting these models to the MUZ-SF·VE(H)-series outdoor units enables the low standby power control. Refer to the tech-
nical guide (OBT17) about the low standby power control.
These models may be connected to the MUZ-SF·VE(H) series after once connected to the MXZ series and operated, for
example because of relocation. In that case, the MUZ-SF·VE(H) series outdoor units will not operate without taking a step.
Follow the procedure "Deleting the memorized abnormal condition" described in 10-2.1.
OBH600B

4
ACCESSORIES
MSZ-SF25VE MSZ-SF35VE MSZ-SF42VE MSZ-SF50VE
PART NAMES AND FUNCTIONS
2
Model MSZ-SF25VE MSZ-SF35VE MSZ-SF42VE MSZ-SF50VE
Installation plate 1
Installation plate fixing screw 4 × 25 mm 5
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
Operation
indicator lamp
Remote control
receiving section
Emergency
operation switch
Horizontal vane
Air inlet
Air filter
(Nano platinum filter)
Air cleaning filter
(Electrostatic anti-allergy
enzyme filter, option)
Heat exchanger
Front panel
Air outlet
Remote controller
OBH600B

5
Indoor model MSZ-SF25VE MSZ-SF35VE MSZ-SF42VE MSZ-SF50VE
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input
1
Cooling W18 22
Heating 24 27 35
Running
current 1
Cooling A0.16 0.18
Heating 0.20 0.22 0.27
Fan motor
Model RC0J21-AA
Current 1 Cooling A0.16 0.18
Heating 0.20 0.22 0.27
Dimensions W × H × D mm 798 × 299 × 195
Weight kg 10
Special remarks
Air direction 5
Airflow
Cooling
Super High
m3/h
546 594
High 432 474 492
Med. 336 402 414
Low 246 348 366
Silent 210 300 336
Heating
Super High
m3/h
618 660 720
High 492 498 546 588
Med. 402 432 480
Low 246 348 384
Silent 210 300 336
Sound level
Cooling
Super High
dB(A)
42 45
High 36 38 40
Med. 30 34 36
Low 24 31 33
Silent 21 28 30
Heating
Super High
dB(A)
45 46 47 49
High 39 42 43
Med. 34 36 38
Low 24 31 33
Silent 21 28 30
Fan speed
Cooling
Super High
rpm
1,200 1,280
High 1,000 1,070 1,100
Med. 820 940 970
Low 660 850 880
Silent 590 760 820
Heating
Super High
rpm
1,330 1,400 1,500
High 1,100 1,120 1,200 1,270
Med. 940 1,000 1,080
Low 660 850 910
Silent 590 760 820
Fan speed regulator 5
Remote controller model SG11D
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
Heating: Indoor Dry-bulb temperature 20°C Wet-bulb temperature 15°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
1 Measured under rated operating frequency.
SPECIFICATION
3
Specifications and rated conditions of main electric parts
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV) 12 VDC
Varistor (NR11) S10K300E2K1 (ERZV10D471)
Terminal block (TB) 3P
OBH600B

6
MSZ-SF25VE
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
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
42
46
NC-10
MSZ-SF35VE
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
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
42
45
NC-10
NOISE CRITERIA CURVES
4
Test conditions
Cooling: Dry-bulb temperature 27 °C
Wet-bulb temperature 19 °C
Heating: Dry-bulb temperature 20 °C
Wet-bulb temperature 15 °C
INDOOR UNIT
WALL
MICROPHONE
0.8m
1m
MSZ-SF42VE
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
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
45
49
NC-10
MSZ-SF50VE
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
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
42
47
NC-10
OBH600B

7
Unit: mm
MSZ-SF25VE MSZ-SF35VE MSZ-SF42VE MSZ-SF50VE
225225
162.5 162.5
3.5
42
41
87.5 87.5
331.5 309.5
215.5
257
258
22235
236
67.5 89.5
58
92
47
108.5
100
7
()80
60
193
18
71
47
5
195
5871
45
45
299
577 16061
798
778 10
216.5
Piping
Insulation Φ37 O.D
Liquid line Φ6.35 - 0.39m (Flared connection Φ6.35)
Gas line Φ9.52 - 0.34m [Flared connection Φ9.52 (MSZ-SF25/35/42VE), Φ12.7 (MSZ-SF50VE)]
Drain hose Inslation Φ28 Connected part Φ16 O.D
Piping
Insulation Φ37 O.D
Liquid line Φ6.35 - 0.5m (Flared connection Φ6.35)
Gas line Φ9.52 - 0.43m [Flared connection Φ9.52 (MSZ-SF25/35/42VE), Φ12.7 (MSZ-SF50VE)]
Drain hose Inslation Φ28 Connected part Φ16 O.D
(MSZ-SF25/35/42/50VE- E1 , E2 )
(MSZ-SF25/35/42/50VE- EN1 , EN2 )
11×26 Oblong hole 11×20 Oblong hole
Installation plate
Indoor unit
Wall hole Φ65
Air inAir inAir inAir in
Installation plate
Piping
Drain hose
Air out
OUTLINES AND DIMENSIONS
5
OBH600B

8
MSZ-SF25VE MSZ-SF42VE
WIRING DIAGRAM
6
MSZ-SF35VE MSZ-SF50VE
OBH600B

9
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø9.52 (MSZ-SF25/35/42VE)
ø12.7 (MSZ-SF50VE)
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Indoor coil
thermistor
RT13 (sub)
Refrigerant flow in cooling
Refrigerant flow in heating
Unit: mm
REFRIGERANT SYSTEM DIAGRAM
7
MSZ-SF25VE MSZ-SF35VE MSZ-SF42VE MSZ-SF50VE
OBH600B

10
8-1. TIMER SHORT MODE
For service, the following set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board.
(Refer to 10-7.)
Set time: 3 minutes →3 seconds (It takes 3 minutes for the compressor to start operation. However, the starting time is
shortened by short circuit of JPG and JPS.)
8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION
A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.
How to modify the remote controller P.C. board
Remove batteries before modification.
The board has a print as shown below:
The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.
After modification, press the RESET button.
NOTE: For modification, take out the batteries and press the OPERATE/STOP (ON/OFF) button 2 or 3 times at first.
After modification, put back the batteries then press the RESET button.
Table 1
1 unit operation 2 units operation 3 units operation 4 units operation
No. 1 unit No modification Same as at left Same as at left Same as at left
No. 2 unit — Solder J1 Same as at left Same as at left
No. 3 unit — — Solder J2 Same as at left
No. 4 unit — — — Solder both J1 and J2
How to set the remote controller exclusively for particular indoor unit
After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote
controller for the indoor unit.
The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are set.
The setting will be cancelled if the breaker is turned OFF, or the power supply is shut down.
Please conduct the above setting once again after the power has restored.
SERVICE FUNCTIONS
8
J1 J2
MSZ-SF25VE MSZ-SF35VE MSZ-SF42VE MSZ-SF50VE
OBH600B