Mitsubishi Electric MSZ-HR25VFK User manual

Models
MSZ-HR25VF -E6 , E7 MSZ-HR25VFK -E6
MSZ-HR35VF -E6 , E7 MSZ-HR35VFK -E6
MSZ-HR42VF -E6 , E7 MSZ-HR42VFK -E6
MSZ-HR50VF -E6 , E7 MSZ-HR50VFK -E6
INDOOR UNIT No. OBH844
REVISED EDITION-B
Outdoor unit service manual
MUZ-HR∙VF Series (OBH823)
MXZ-HA∙VF Series (OBH828)
PARTS CATALOG (OBB844)
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS··················3
3. SPECIFICATION ········································4
4. NOISE CRITERIA CURVES··························5
5. OUTLINES AND DIMENSIONS·····················6
6. WIRING DIAGRAM·····································7
7. REFRIGERANT SYSTEM DIAGRAM·············9
8. SERVICE FUNCTIONS······························10
9. MICROPROCESSOR CONTROL ················13
10. TROUBLESHOOTING·······························17
11. DISASSEMBLY INSTRUCTIONS·················32
SERVICE MANUAL
OBH844 REVISED EDITION-A is void.
Revision B:
•MSZ-HR25/35/42/50VF - E7 and MSZ-
HR25/35/42/50VFK - E6 have been added.

2
Use the specied 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.
TECHNICAL CHANGES
1
MSZ-HR25VF - E6
MSZ-HR35VF - E6
MSZ-HR42VF - E6
MSZ-HR50VF - E6
1. New model
MSZ-HR25VF - E6 MSZ-HR25VF - E7
MSZ-HR35VF - E6 MSZ-HR35VF - E7
MSZ-HR42VF - E6 MSZ-HR42VF - E7
MSZ-HR50VF - E6 MSZ-HR50VF - E7
1. Air cleaning filter has been changed.
2. Panel assembly has been changed.
3. Electronic control P.C. board has been changed.
MSZ-HR25VFK - E6
MSZ-HR35VFK - E6
MSZ-HR42VFK - E6
MSZ-HR50VFK - E6
1. New model
<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 pull 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.
Revision A:
•10. TROUBLESHOOTING has been modified.
WARNING
• When the refrigeration circuit has a leak, do not execute pump down with the compressor.
• When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
The compressor may burst if air etc. get into it.
• When opening or closing the valve below freezing temperatures, refrigerant may spurt out from the gap
between the valve stem and the valve body, resulting in injuries.
Revision B:
•MSZ-HR25/35/42/50VF - E7 and MSZ-HR25/35/42/50VFK - E6 have been added.
OBH844B

3
PART NAMES AND FUNCTIONS
2
MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF
MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK
ACCESSORIES
Model
MSZ-HR25VF
MSZ-HR35VF
MSZ-HR42VF
MSZ-HR50VF
MSZ-HR25VFK
MSZ-HR35VFK
MSZ-HR42VFK
MSZ-HR50VFK
Installation plate 1
Installation plate xing screw 4 × 25 mm 5
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
Battery (AAA) for remote controller 2
Operation indicator lamp
Remote control receiving section
Horizontal vane
Air inlet
Air filter
Front panel
Air outlet
Heat exchanger
Emergency operation switch
Air cleaning filter
(Silver-ionized
air purifier filter, option)
Fan guard
Wi-Fi interface
(Only for MSZ-HR∙VFK)
(Only for MSZ-HR∙VF - E6 )
Air cleaning filter
(V Blocking Filter, option)
(Only for MSZ-HR∙VF - E7 and
MSZ-HR∙VFK - E6 )
Remote controller
OBH844B

4
SPECIFICATION
3
Indoor model MSZ-HR25VF
MSZ-HR25VFK MSZ-HR35VF MSZ-HR35VFK MSZ-HR42VF MSZ-HR42VFK MSZ-HR50VF MSZ-HR50VFK
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input
*1Cooling W20 28 32 39
Heating 20 28 32 39
Running
current *1Cooling A0.20 0.27 0.30 0.36
Heating 0.20 0.27 0.30 0.36
Fan motor
Model RC0J30-CV
Current *1Cooling A0.20 0.27 0.30 0.36
Heating 0.20 0.27 0.30 0.36
Dimensions W × H × D mm 838 × 280 × 228
Weight kg 8.5 9.0
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
582 702 786
High 432 468 648 672
Med. 324 336 522
Low 216 360 384
Heating
Super High 606 630 804 870
High 444 648 672
Med. 324 474 498
Low 198 336 366
Sound level
Cooling
Super High
dB(A)
43 46 45
High 37 38 39 40
Med. 30 31 34 36
Low 21 22 24 28
Heating
Super High 43 44 46 47
High 37 40 41
Med. 30 32 34
Low 21 24 27
Fan speed
Cooling
Super High
rpm
1,120 1,280 1,130
High 900 950 970 1,000
Med. 730 750 830 860
Low 550 630 660
Heating
Super High 1,150 1,180 1,150 1,220
High 920 970 1,000
Med. 730 770 800
Low 520 600 640
Fan speed regulator 4
Remote controller model RH18A
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 -
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
*1 Measured under rated operating frequency.
Specifications and rated conditions of main electric parts
Model
MSZ-HR25VF MSZ-HR25VFK
MSZ-HR35VF MSZ-HR35VFK
MSZ-HR42VF MSZ-HR42VFK
MSZ-HR50VF MSZ-HR50VFK
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV) 12 V DC
Varistor
(NR11) 470 V
Terminal block (TB) 3P
OBH844B

5
NOISE CRITERIA CURVES
4
MSZ-HR25VF
MSZ-HR25VFK MSZ-HR35VF
MSZ-HR35VFK
MSZ-HR42VF
MSZ-HR42VFK MSZ-HR50VF MSZ-HR50VFK
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
COOLING
FUNCTION SPL(dB(A)) LINE
45
HEATING 46
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
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
COOLING
FUNCTION SPL(dB(A)) LINE
45
HEATING 47
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
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
COOLING
FUNCTION SPL(dB(A)) LINE
43
HEATING 43
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
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
COOLING
FUNCTION SPL(dB(A)) LINE
46
HEATING 44
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
Test conditions
Cooling: Dry-bulb temperature 27°C
Wet-bulb temperature 19°C
Heating: Dry-bulb temperature 20°C
Wet-bulb temperature -°C
INDOOR UNIT WALL
MICROPHONE
0.8m
1m
OBH844B

6
OUTLINES AND DIMENSIONS
5
Unit: mm
MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF
MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK
OBH844B

7
MSZ-HR25VF - E6 MSZ-HR35VF - E6 MSZ-HR42VF - E6 MSZ-HR50VF - E6
WIRING DIAGRAM
6
MSZ-HR25VF - E7 MSZ-HR35VF - E7 MSZ-HR42VF - E7 MSZ-HR50VF - E7
OBH844B

8
MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK
OBH844B

9
REFRIGERANT SYSTEM DIAGRAM
7
Unit: mm
MSZ-HR25VF MSZ-HR25VFK MSZ-HR35VF MSZ-HR35VFK
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11 Flared connection
Refrigerant flow in cooling
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12
Refrigerant flow in heating
Indoor coil
thermistor
RT13
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11 Flared connection
Refrigerant flow in cooling
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12
Refrigerant flow in heating
Indoor coil
thermistor
RT13
MSZ-HR42VF MSZ-HR42VFK MSZ-HR50VF MSZ-HR50VFK
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12
Refrigerant flow in cooling
Refrigerant flow in heating
Indoor coil
thermistor
RT13
OBH844B

10
MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF
MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK
8-1. TIMER SHORT MODE
For service, the following set time can be shortened by bridging the timer short mode point on the electronic control P.C.
board. (Refer to 10-7.)
• The set time for the ON/OFF timer can be reduced to 1 second for each minute.
• After the breaker is turned on, the time for starting the compressor, which normally takes 3 minutes, can be reduced to 1
minute. Restarting the compressor, which takes 3 minutes, cannot be reduced.
SERVICE FUNCTIONS
8
Table 1 1 unit operation 2 units operation 3 units operation 4 units operation
No. 1 unit No modication Same as at left Same as at left Same as at left
No. 2 unit — Solder J2 Same as at left Same as at left
No. 3 unit — — Solder J4/JP4 Same as at left
No. 4 unit — — — Solder both J2 and J4/JP4
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 been restored.
J2 J4
The P.C. board has the print “J2” and “J4/JP4”. Solder “J2” and “J4/JP4” 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
OFF/ON (stop/operate)
button 2 or 3 times at first.
After finish modification,
put back the batteries then
press the RESET button.
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 :
J2 JP4
OBH844B