Mitsubishi Electronics MSZ-FD35VAS, MSZ-FD35VA, MSZ-FD25VA User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Wireless type Models
No. OBH488
MSZ-FD25VA -
E1
MSZ-FD25VAS ­MSZ-FD35VA -
E1
MSZ-FD35VAS -
E1
E1
Outdoor unit service manual MUZ-FD·VA Series(OBH489) MXZ-A·VA Series (OB377) MXZ-8A140A (OC316)
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 ············································7
7. REFRIGERANT SYSTEM DIAGRAM················8
9. MICROPROCESSOR CONTROL ····················11
10. TROUBLESHOOTING ······································20
11. DISASSEMBLY INSTRUCTIONS·····················36
PARTS CATALOG (OBB488)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
2
1
TECHNICAL CHANGES
MSZ-FD25VA - MSZ-FD25VAS ­MSZ-FD35VA - MSZ-FD35VAS -
1. New model
E1E1 E1E1
3
2
Air outlet
Vertical vane
Air filter
Front panel
Horizontal vane
Remote controller
AREA lamp indicate AREA setting
In AREA setting, the horizontal air flow direction changes automatically according to the detection of i-see Sensor which detects the floor/ wall temperature to air-condition the room evenly.
i-see control operation
i-see sensor constantly measure floor/wall temperature to automatically adjust to the set temperature by estimating the temperature actually perceived by a person inside the room ("sensible temperature").
Operation Indicator lamp
Remote control receiving section
Emergency operation switch
Fan
Fan guard
i-see sensor
Heat exchanger
Air inlet
Plasma anti-allergy enzyme filter
Plasma electrode unit
Plasma deodorizing filter
AREA lamp
POWER lamp
CLEAN lamp PLASMA lamp
1 2 3 4 5 6 7
Installation plate Installation plate fixing screw 4 o 25 mm Remote controller holder Fixing screw for 3 3.5 o 1.6 mm (Black) Battery (AAA) for remote controller Wireless remote controller Felt tape (Used for left or left-rear piping)
1 5 1 2 2 1 1
PART NAMES AND FUNCTIONS
MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS
ACCESSORIES
4
3
MSZ-FD25VA MSZ-FD35VA
Single phase
230 V, 50 Hz
RCOJ40-GF
798O295O257
12
4
672
516/378/276
1,190
950/740/580
4
KM08A
Indoor model
Power supply
Power input 1
Running current ✽1
Fan motor current ✽1
Fan motor model Dimensions WOHOD Weight Color Air direction Air flow (Super High) Air flow (High/Med./Low) Sound level (Super High) Sound level (High/Med./Low) Fan speed (Super High) Fan speed (High/Med./Low) Fan speed regulator Remote controller model
W
A
A
mm
kg
K /h
K /h
dB(A)
dB(A)
rpm
rpm
Electrical
data
Special remarks
Cooling Heating Cooling Heating Cooling Heating
Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating
MSZ-FD25VAS MSZ-FD35VAS
26 31
0.25
0.30
0.25
0.30
726
552/402/270
42
36/29/20
1,270
1,010/780/570
28 33
0.27
0.32
0.27
0.32
750
552/402/282
43
36/29/21
1,300
1,010/780/590
PURE WHITE SILVER PURE WHITE SILVER
250 V 3.15 A
MP20Z 12 VDC 300 " (at 25 ˚C) MSFBC20C29 12 VDC 350 " (at 25 ˚C) MSBPC20M11 12 VDC 300 " (at 25 ˚C)
S10K320E3K1
A2TPMI 23A FOV50 OBA060 P8L1 J4S
3P
Fuse i-see Sensor motor Horizontal vane motor Vertical vane motor Varistor i-see Sensor Terminal block
(F11)
(MT) (MV1) (MV2)
(NR11)
(RR)
(TB)
SPECIFICATION
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor Dry-bulb temperature 27 : Wet-bulb temperature 19 : Heating : Indoor Dry-bulb temperature 20 :
Specifications and rating conditions of main electric parts
Refrigerant piping length (one way): 5 m 1 Measured under rated operating frequency.
Outdoor Dry-bulb temperature 35 : Outdoor Dry-bulb temperature 7 : Wet-bulb temperature 6 :
5
4
INDOOR UNIT
WALL
MICROPHONE
0.8 m
1 m
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
Test conditions Cooling : Dry-bulb temperature 27 : Wet-bulb temperature 19 :
Heating : Dry-bulb temperature 20 :
43 43
NC-10
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
43
NC-10
NOISE CRITERIA CURVES
MSZ-FD25VA MSZ-FD25VAS
MSZ-FD35VA MSZ-FD35VAS
6
225 225
64
64
155155
345
54
330 69
42
211.5
3
253
231.5
41
212.5
254
43
69
7
43
85
97
295
21.5
56
55 55688
100
785
798
6.5
47
Wall hole [65
11 X 26 Oblong hole
11 X 20 Oblong hole
Indoor unit
Installation plate
5257
Installation plate
Piping
Drain hose
Air in
Air out
19
159
58
Piping
Insulation
[35 O.D
Liquid line
[6.35 - 0.5 m (Flared connection [6.35)
Gas line
[9.52 - 0.43 m (Flared connection [9.52)
Drain hose
Insulation [28 O.D Connected part [16 O.D
5
OUTLINES AND DIMENSIONS
MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS
Unit : mm
6
WIRING DIAGRAM
MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS
7
7
Indoor heat exchanger
Flared connection
Room temperature thermistor RT11
Flared connection
Refrigerant pipe [9.52 (with heat insulator)
Refrigerant pipe [6.35 (with heat insulator)
Indoor coil thermistor RT12 (main)
Indoor coil thermistor RT13 (sub)
Refrigerant flow in cooling Refrigerant flow in heating
REFRIGERANT SYSTEM DIAGRAM
MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS
Unit : mm
8
8
No. 1 unit No. 2 unit No. 3 unit No. 4 unit
1 unit operation No modification
– – –
2 units operation
Same as at left
Solder J1
– –
3 units operation
Same as at left Same as at left
Solder J2
4 units operation
Same as at left Same as at left Same as at left
Solder both J1 and J2
SERVICE FUNCTIONS
MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS
8-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. The time will be shortened as follows. (Refer to 10-7.) Set time : 1-minute 1-second Set time : 3-minute 3-second (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 :
NOTE : For modification, take out
the batteries and press the OPERATE/STOP(ON/OFF) button twice or 3 times at first. After modification, put back the batteries then press
J1
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.
J2
the RESET button.
Table 1
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 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.
9
8-3. AUTO RESTART FUNCTION
8-4. REMOTE CONTROLLER
Be sure to set the slide switch inside the remote controller to an appropriate position in accordance with the installed position of the indoor unit. If the switch is not set correctly, the air conditioner may not function properly.
Area Left Center Right
Where is the indoor unit installed in your room?
NOTE:If the indoor unit is installed more than 50 cm away from the side walls, cabinets or other nearby objects, set the slide
switch to the center position.
(Left) (Center) (Right)
Slide swich
Position of
the slide
switch
Display on the remote
controller
Installed at left, if the distance is not more than 50 cm.
Installed at right, if the distance is not more than 50 cm.
Is the indoor unit in­stalled at right, left or center?
JR07
CN151 CN211CN112 CN1R1
CN212
CN1T1
CN1U1
CN130
IC156
When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shutoff of the main power.
Operation
1
If the main power has been cut, the operation settings remain.
2 After the power is restored, the unit restarts automatically according to the memory.
(However, it takes at least 3 minutes for the compressor to start running.)
How to release “AUTO RESTART FUNCTION”
1
Turn OFF the main power for the unit.
2Solder the Jumper wire to JR07 on the indoor electronic control
P.C. board. (Refer to 10-7.)
NOTE :
The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote
controller.
If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is can-
celled.
If the unit has been OFF with the remote controller before power failure, the auto restart function does not work as the
power button of the remote controller is OFF.
To prevent breaker OFF due to the rush of starting current, systematize other home appliance not to turn ON at the
same time.
When some air conditioners are connected to the same supply system, if they are operated before power failure, the
starting current of all the compressors may flow simultaneously at restart. Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current by adding to the system that allows the units to start one by one.
10
9
ON TIMER button
CLOCK SET button
TIME SET buttons FORWARD button BACKWARD button
OFF TIMER button
RESET button
VANE CONTROL button
WIDE VANE button
(Vertical vane button)
CLEAN button
AREA button
i-see button
Signal transmitting section
Operation display section
OPERATE/STOP (ON/OFF) button
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
Indication of remote controller model is on back
PLASMA button
Temperature buttons
MICROPROCESSOR CONTROL
MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS
WIRELESS REMOTE CONTROLLER
NOTE: Last setting will be stored after the unit is turned OFF with the remote controller. Indoor unit receives the signal of the
remote controller with beeps.
INDOOR UNIT LAMP
The lamps at the center of the indoor unit indicates the operation state.
Lamp
AREA
POWER
CLEAN
PLASMA
Operation state Refer to 9-7. Lamp lights during operation.
Lamp blinks in abnormal condition. Lamp lights during clean operation.
Refer to 9-9. Lamp lights during PLASMA operation.
Refer to 9-8.
11
9-1. COOL ( ) OPERATION
(1) Press OPERATE/STOP(ON/OFF) button.
POWER lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature.
The setting range is 16 ~ 31 °C.
1. Coil frost prevention
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil from frosting. When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works. The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor heat exchanger rises.
2. Low outside temperature operation
When the outside temperature is lower, low outside temperature operation starts, and the outdoor fan slows or stops.
9-2. DRY ( ) OPERATION
(1) Press OPERATE/STOP(ON/OFF) button.
POWER lamp of the indoor unit turns on with a beep tone. (2) Select DRY mode with OPERATION SELECT button. (3) The set temperature is determined from the initial room temperature.
1. Coil frost prevention
Coil frost prevention is as same as COOL mode. (9-1.1.)
2. Low outside temperature operation
Low outside temperature operation is as same as COOL mode. (9-1.2.)
9-3. HEAT ( ) OPERATION
(1) Press OPERATE/STOP(ON/OFF) button.
POWER lamp of the indoor unit turns on with a beep tone. (2) Select HEAT mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature.
The setting range is 16 ~ 31 °C.
1. Cold air prevention control
When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room tem-
perature is low or when defrosting is being done, the indoor fan will stop or rotate in Very Low speed.
2. High pressure protection
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the con­densing pressure from increasing excessively. When the temperature of indoor heat exchanger becomes too high, the high pressure protection works. The indoor fan operates following the cold air prevention control. This mode continues until the temperature of indoor heat exchanger falls.
3. Defrosting
Defrosting starts when the temperature of outdoor heat exchanger becomes too low. The compressor stops once, the indoor/outdoor fans stop, the 4-way valve reverses, and the compressor re-starts. This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes.
9-4. AUTO CHANGE OVER ··· AUTO MODE OPERATION
Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation.
Mode selection
(1) Initial mode
When unit starts the operation with AUTO operation from off;
If the room temperature is higher than the set temperature, operation starts in COOL mode.
If the room temperature is equal to or lower than the set temperature, operation starts in HEAT mode.
(2) Mode change
COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 2 °C below the set temperature. HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 2 °C above the set temperature.
NOTE 1
If two or more indoor units are operating in multi system, there might be a case that the indoor unit, which is operating in (AUTO), cannot change over to the other operating mode (COOL HEAT) and becomes a state of standby. Refer to NOTE 2 FOR MULTI SYSTEM AIR CONDITIONER”.
12
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