Mitsubishi Electric MSZ-FH25VE - E1 User manual

CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. NOISE CRITERIA CURVE ································ 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····································· 20
11. DISASSEMBLY INSTRUCTIONS···················· 36
SPLIT-TYPE AIR CONDITIONERS
SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OBB623)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Outdoor unit service manual
MUZ-FH·VEHZ Series (OBH625)
MUZ-FH·VE Series
MXZ-D·VA Series
No. OBH623
REVISED EDITION-A
Models
MSZ-FH25VE -E1
MSZ-FH35VE -E1
MSZ-FH50VE -E1
Please void OBH623.
Revision A:
• MSZ-FH50VE-
E1
has been added.
Outdoor unit service manual
MUZ-FH·VEHZ Series (OBH625)
MUZ-FH·VE Series (OBH624)
MXZ-D·VA Series (OBH626)

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-FH50VE-
E1
has been added.
OBH623A

3
TECHNICAL CHANGES
1
MSZ-FH25VE - E1
MSZ-FH35VE - E1
MSZ-FH50VE - E1
1. New model
These models are compatible with the outdoor units with low standby power control.
Connecting these models to the MUZ-FH·VE(HZ)-series outdoor units enables the low standby power control. Refer to the
technical guide (OBT17) about the low standby power control.
These models may be connected to the MUZ-FH·VE(HZ) series after once connected to the MXZ series and operated, for
example because of relocation. In that case, the MUZ-FH·VE(HZ) series outdoor units will not operate without taking a step.
Follow the procedure "Deleting the memorized abnormal condition" described in 10-2.1.
OBH623A

4
ACCESSORIES
MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE
PART NAMES AND FUNCTIONS
2
Model MSZ-FH25VE MSZ-FH35VE
MSZ-FH50VE
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
Air cleaning filter
(Electrostatic anti-allergy enzyme filter) 1
Air cleaning filter (Deodorizing filter) 1
Air purifying device 1
Operation indicator lamp
Remote control receiving
section
Emergency
operation
switch
Horizontal
vane
Air inlet
Air filter
Air cleaning filter
(Electrostatic anti-allergy
enzyme filter and deodorizing filter)
Front panel
Air outlet
Air purifying device
i-see SENSOR
(AIR PURIFYING)
(POWER)
Remote controller
OBH623A

5
Indoor model MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input 1 Cooling W29 31
Heating 29 31
Running current
1Cooling A0.28 0.29
Heating 0.28 0.29
Fan motor
Model RC0J30-MD
Current 1 Cooling A0.28 0.29
Heating 0.28 0.29
Dimensions W × H × D mm 925 × 305(+17) × 234
Weight kg 13.5
Special remarks
Air direction 5
Airflow
Cooling
Super High
m3/h
696 744
High 516 606
Med. 378 516
Low 282 444
Silent 234 384
Heating
Super High
m3/h
792 876
High 552 672
Med. 384 540
Low 282 432
Silent 240 342
Sound level
Cooling
Super High
dB(A)
42 44
High 36 39
Med. 29 35
Low 23 24 31
Silent 20 21 27
Heating
Super High
dB(A)
44 46
High 36 39
Med. 29 34
Low 24 29
Silent 20 21 25
Fan speed
Cooling
Super High
rpm
1,220 1,280
High 970 1,090
Med. 770 970
Low 630 870
Silent 550 780
Heating
Super High
rpm
1,350 1,460
High 1,020 1,180
Med. 780 1,000
Low 630 850
Silent 560 720
Fan speed regulator 5
Remote controller model SG13A
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
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
1 Measured under rated operating frequency.
SPECIFICATION
3
Specifications and rating conditions of main electric parts
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV1) 12 VDC
Vertical vane motor (MV2) 12 VDC
i-see SENSOR MOTOR (MT) 12 VDC
Varistor (NR11) S10K300E2K1
Terminal block (TB) 3P
OBH623A

6
MSZ-FH25VE MSZ-FH35VE
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
44
NC-10
NOISE CRITERIA CURVE
4
Test conditions
Cooling: Dry-bulb temperature 27 °C
Wet-bulb temperature 19 °C
Heating: Dry-bulb temperature 20 °C
INDOOR UNIT WALL
MICROPHONE
0.8m
1m
MSZ-FH50VE
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
44
46
NC-10
OBH623A

7
Unit: mm
MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE
MSZ-FH25VE MSZ-FH35VE
Piping
Insulation ø37 O.D
Liquid line ø6.35 - 0.39 m (Flared connection ø6.35)
Gas line ø9.52 - 0.34 m (Flared connection ø9.52)
Drain hose Insulation ø28 O.D Connected part ø16 O.D
OUTLINES AND DIMENSIONS
5
MSZ-FH50VE
Piping
Insulation ø37 O.D
Liquid line ø6.35 - 0.39 m (Flared connection ø6.35)
Gas line ø9.52 - 0.34 m (Flared connection ø12.7)
Drain hose Insulation ø28 O.D Connected part ø16 O.D
OBH623A

8
MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE
WIRING DIAGRAM
6
OBH623A

9
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 (main)
Indoor coil
thermistor
RT13 (sub)
Refrigerant flow in cooling
Refrigerant flow in heating
Unit: mm
REFRIGERANT SYSTEM DIAGRAM
7
MSZ-FH25VE MSZ-FH35VE
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø12.7
(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
MSZ-FH50VE
OBH623A

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. HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT
A maximum of 4 indoor units with wireless remote controllers can be used in a room.
To operate the indoor units individually with each remote controller, assign a number to each remote controller according
to the number of the indoor unit.
This setting can be set only when all the following conditions are met:
• The remote controller is powered OFF.
• Weekly timer is not set.
• Weekly timer is not being edited.
(1) Hold down button on the remote controller for 2 seconds to enter the pairing mode.
(2) Press button again and assign a number to each remote controller.
Each press of button advances the number in the following order: 1 →2 →3 →4.
(3) Press button to complete the pairing setting.
After you turn the breaker ON, the remote controller that first sends a signal to an indoor unit will be regarded as the
remote controller for the indoor unit.
Once they are set, the indoor unit will only receive the signal from the assigned remote controller afterwards.
SERVICE FUNCTIONS
8
MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE
8-3. SETTING THE INSTALLATION POSITION
Be sure to set the remote controller according to the installed position of the indoor unit.
Installation position:
Left: Distance to objects (wall, cabinet, etc.) is less than 50 cm to the left
Center: Distance to objects (wall, cabinet, etc.) is more than 50 cm to the left and right
Right: Distance to objects (wall, cabinet, etc.) is less than 50 cm to the right
The installation position can be set only when all the following conditions are met:
• The remote controller is powered OFF.
• Weekly timer is not set.
• Weekly timer is not being edited.
(1) Hold down button on the remote controller for 2 seconds to enter the position setting mode.
(2) Select the target installation position by pressing button. (Each press of the button displays the
positions in order: center →right →left.)
(3) Press button to complete the position setting.
Installation position Left Center Right
Remote controller
display
(Left)(Center)(Right)
OBH623A