Mitsubishi Electric MSZ-FD VA Series User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. NOISE CRITERIA CURVES ······························ 8
5. OUTLINES AND DIMENSIONS ························ 9
6. WIRING DIAGRAM·········································· 10
7. REFRIGERANT SYSTEM DIAGRAM ············· 13
8. PERFORMANCE CURVES ····························· 15
9. ACTUATOR CONTROL··································· 29
10. SERVICE FUNCTIONS···································· 30
11. TROUBLESHOOTING ····································· 31
12. DISASSEMBLY INSTRUCTIONS···················· 55
Models
SPLIT-TYPE AIR CONDITIONERS
MUZ-FD25VA - E1
MUZ-FD25VAH - E1 ,E2
MUZ-FD35VA - E1
MUZ-FD35VAH - E1
MUZ-FD50VA - E1
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH489
REVISED EDITION-B
OUTDOOR UNIT
Indoor unit service manual
MSZ-FD•VA Series (OBH488)
PARTS CATALOG (OBB489)
Revision B:
• MUZ-FD50VA- E1 has been added.
Please void OBH489 REVISED EDITION-A.
MUZ-FD25/35

2
Revision A:
• MUZ-FD25VAH- E2 has been added.
• Power outlet has been corrected.
Revision B:
• MUZ-FD50VA- E1 has been added.

3
TECHNICAL CHANGES
1
MUZ-FD25VA - E1
MUZ-FD25VAH - E1
MUZ-FD35VA - E1
MUZ-FD35VAH - E1
MUZ-FD50VA - E1
1. New model
MUZ-FD25VAH - E1 →MUZ-FD25VAH - E2
1. Power outlet E1 :12 A, E2 :10 A

4
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA MUZ-FD35VAH
PART NAMES AND FUNCTIONS
2
Piping
Air outlet
Air inlet
(back and side)
Drain hose
Drain outlet
ACCESSORIES
MUZ-FD25/35VA MUZ-FD50VA
Drain socket 1 1
Drain cap - 2
MUZ-FD50VA

5
Outdoor model MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA MUZ-FD35VAH
Power supply Single phase, 230 V, 50 Hz
Capacity
Rated frequency (Min.-Max.)
Cooling kW 2.5 (1.1-3.5) 3.5 (1.1-4.0) 3.5 (0.8-4.0)
Heating 3.2 (1.5-5.5) 3.2 (1.5-6.3) 4.0 (1.5-6.3) 4.0 (1.3-7.7)
Breaker Capacity A 10 E1 : 12
E2 : 10 10 12
Electrical data
Power input 1 (Total) Cooling W485 850 835
Heating 610 865 850
Running current 1 (Total) Cooling A2.4 3.9 3.8
Heating 2.9 4.0 3.9
Power factor 1 (Total) Cooling %88 95 96
Heating 91 94 95
Starting current 1 (Total) A 2.9 4.0 3.9
Coefficient of performance
(COP) 1 (Total)
Cooling 5.15 4.12 4.19
Heating 5.25 4.62 4.71
Compressor
Model SNB130FGBH
Output W 900
Current 1 Cooling A1.88 3.31 3.21
Heating 2.30 3.33 3.23
Refrigeration oil (Model) cc 450 (NEO22)
Fan motor
Model RC0J50-EA
Current 1Cooling A0.27 0.32
Heating 0.30 0.35
Dimensions W × H × D mm 800 × 550 × 285
Weight kg 36
Special remarks
Dehumidification Cooling /h 1.4 2.0
Air flow 1
Cooling High
m3/h
1,872
Low 1,086
Heating
High 2,016
Med. 1,776
Low 1,386
Sound level 1 Cooling dB(A) 46 47
Heating 50
Fan speed
Cooling High
rpm
810
Low 490
Heating
High 870
Med. 770
Low 610
Fan speed regulator 3
Refrigerant filling capacity (R410A) kg 1.15
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
Refrigerant piping length (one way): 5 m
1 Measured under rated operating frequency.
SPECIFICATION
3

6
Outdoor model MUZ-FD50VA
Power supply Single phase, 230 V, 50 Hz
Capacity
Rated frequency (Min.-Max.)
Cooling kW 5.0 (1.5-5.8)
Heating 5.8 (1.5-7.8)
Breaker Capacity A 16
Electrical data
Power input 1 (Total) Cooling W1,500
Heating 1,550
Running current 1 (Total) Cooling A6.7
Heating 6.9
Power factor 1 (Total) Cooling %98
Heating 98
Starting current 1 (Total) A 6.9
Coefficient of performance
(COP) 1 (Total)
Cooling 3.33
Heating 3.74
Compressor
Model SNB172FDGH
Output W 1,200
Current 1Cooling A5.40
Heating 5.62
Refrigeration oil (Model) cc 450 (NEO22)
Fan motor
Model RC0J60-AA
Current 1 Cooling A 0.72
Heating
Dimensions W × H × D mm 840 × 850 × 330
Weight kg 55
Special remarks
Dehumidification Cooling /h 1.7
Air flow 1
Cooling
High
m3/h
–
Med. 2,940
Low 1,680
Heating
High 2,940
Med. 2,940
Low 2,100
Sound level 1 Cooling dB(A) 54
Heating 56
Fan speed
Cooling
High
rpm
–
Med. 800
Low 480
Heating
High 800
Med. 800
Low 580
Fan speed regulator 2
Refrigerant filling capacity (R410A) kg 1.55
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
Refrigerant piping length (one way): 5 m
1 Measured under rated operating frequency.

7
Specifications and rating conditions of main electric parts
Model
Item MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA MUZ-FD35VAH
Current transformer (CT) 20 A
(CT761, CT781) 15 A
Smoothing capacitor (C61, C62, C63) 620 F 420 V
Diode module (DB61) 15 A 600 V
(DB65) 25 A 600 V
Fuse (F61) T20AL250V
(F701, F801, F901) T3.15AL250V
Defrost heater (H) — 230 V 130 W — 230 V 130 W
Intelligent power module (IPM) 20 A 600 V
Expansion valve coil (LEV) DC 12 V
Reactor (L61) 23.0 mH
Current-detecting resistor
(R61, R62) 180 m5 W (2 elements)
(R825) 25 m5 W
(R937, R938, R939) 430 m2 W
Current-limiting PTC thermistor (PTC64, PTC65) 33 
Terminal block (TB1, TB2) 3 P
Relay
(X63) 3 A 250 V
(X64) 20 A 250 V
(X66) — 3 A 250 V — 3 A 250 V
R.V.coil (21S4) AC 220 - 240 V
Heater protector (26H) — Open 45°C — Open 45°C
IGBT (TR821) 30 A 600 V
Model
Item MUZ-FD50VA
Current transformer (CT1, CT2) 20 A
(CT61) 20 A
Smoothing capacitor (CB1, CB2, CB3) 560 F 450 V
Fuse (F64) T2.0AL250V
(F801) T3.15AL250V
Expansion valve coil (LEV) DC 12 V
Intelligent power module (IPM) 15 A 600 V
(HC930) 3 A 600 V
High pressure switch (HPS) ACB-DB156
Reactor (L) 600 H 20 A
Power factor correct module (PFC) 20 A 600 V
Current-limiting PTC thermistor (PTC64, PTC65) 33 
Current-detecting resistor (R937A, R937B) 1.1 2 W
(RS1, RS2, RS3, RS4) 40 m7 W (2 elements)
Solenoid coil relay (SSR61) 0.5 A 600 V
Terminal block (TB1, TB2) 3 P
Relay (X64) 20 A 250 V
R.V. coil (21S4) AC 220 - 240 V

8
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, 0dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING 46
NC-10
MUZ-FD25VA MUZ-FD25VAH
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
HEATING
47
50
Test conditions
Cooling : Dry-bulb temperature 35 °C
Heating : Dry-bulb temperature 7 °C Wet-bulb temperature 6 °C
OUTDOOR UNIT
MICROPHONE
1 m
NC-10
MUZ-FD35VA MUZ-FD35VAH
NOISE CRITERIA CURVES
4
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, 0dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
54
56
NC-10
MUZ-FD50VA

9
Unit: mm
MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA MUZ-FD35VAH
10
69
800
302.5
500 Bolt pitch for installation
150
22.3
Handle
550
280
164.5
99.5
170.5
23 Service panel
Service port
285
344.5
44
400
Air in
Air out
Air in
17.5
Bolt pitch for
installation
304-325
40
Liquid refrigerant pipe joint
Refrigerant pipe (flared) ø6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) ø9.52
43°
35°
2 holes 10 × 21
REQUIRED SPACE
Basically open 100 mm or more
without any obstruction in front
and on both sides of the unit.
350 mm or more
200 mm or more
100 mm or more
100 mm or more
Open two sides of left,
right, or rear side.
Drain hole ø42 (25/35VA)
Drain hole ø33 (25/35VAH)
OUTLINES AND DIMENSIONS
5
30°
35°
155
90
198
40
515
299
66
34
51
330
360
850
430
500 80
121
840
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) ø12.7
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) ø6.35
170
Open as a rule
500 mm or more if
the front and both
sides are open
100 mm or more
200 mm or more if
there are obstacles
to both sides
Open as a rule
500 mm or more if the back,
both sides and top are open
350 mm or more
100 mm or more
REQUIRED SPACE
Air in
Air out
Air in
4 holes 10 × 21
Drain holes ø33
MUZ-FD50VA

10
MUZ-FD25VA MUZ-FD35VA
WIRING DIAGRAM
6

11
MUZ-FD25VAH
MUZ-FD35VAH

12
MUZ-FD50VA

13
Unit: mm
MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA MUZ-FD35VAH
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
Capillary tube
ø 3.0× ø 1.8×600(×2)
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
ø 3.0× ø 2.0×240
Outdoor heat
exchanger
temperature
thermistor
RT68
Muffler
REFRIGERANT SYSTEM DIAGRAM
7
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
ø 3.6 × ø 2.4 × 50 Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe
ø 12.7
(with heat insulator)
Refrigerant pipe ø 6.35
(with heat insulator)
LEV R.V. coil
heating ON
cooling OFF
Muffler
#100
Strainer
#100
Receiver
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
High-pressure
switch
MUZ-FD50VA

14
Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Refrigerant piping: m Piping size O.D: mm
Max. Length
A
Max. Height difference
BGas Liquid
MUZ-FD25
MUZ-FD35 20 12 9.52
6.35
MUZ-FD50 30 15 12.7
ADDITIONAL REFRIGERANT CHARGE (R410A: g)
Model Outdoor unit
precharged
Refrigerant piping length (one way)
5 m 6 m 7 m 8 m 9 m 10 m 11 m 12 m 13 m 14 m 15 m 20 m
MUZ-FD25
MUZ-FD35 1,150 0 0 0 90 120 150 180 210 240 270 300 450
Calculation: X g = 30 g/m × (Refrigerant piping length (m) - 5)
Model Outdoor unit
precharged
Refrigerant piping length (one way)
7 m 10 m 15 m 20 m 25 m 30 m
MUZ-FD50 1,550 0 90 240 390 540 690
Calculation: X g = 30 g/m × (Refrigerant piping length (m) – 7)
NOTE: Refrigerant piping exceeding 7 m requires additional refrigerant charge according to the calculation.

15
The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi-
tions vary according to the areas where these units are installed, the following information has been provided to clarify the
operating characteristics of the air conditioner under the conditions indicated by the performance curve.
(1) GUARANTEED VOLTAGE
198 ~ 264 V, 50 Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature: °C [WB]
}
Cooling
(2) Indoor outlet air wet-bulb temperature: °C [WB]
(3) Outdoor intake air dry-bulb temperature: °C [DB]
(4) Total input: W
(5) Indoor intake air dry-bulb temperature: °C [DB]
}
Heating(6) Outdoor intake air wet-bulb temperature: °C [WB]
(7) Total input: W
Indoor air wet/dry-bulb temperature difference on the left side of the following chart shows the difference between the
indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.
How to measure the indoor air wet-bulb / dry-bulb temperature difference
1. Attach at least 2 sets of wet and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets
of wet and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air
speed is high.
2. Attach at least 2 sets of wet and dry-bulb thermometers to the outdoor air intake.
Cover the thermometers to prevent direct rays of the sun.
3. Check that the air filter is cleaned.
4. Open windows and doors of room.
5. Press the EMERGENCY OPERATION switch once (twice) to start the EMERGENCY COOL (HEAT) MODE.
6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
7. 10 minutes later, measure temperature again and check that the temperature does not change.
MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA MUZ-FD35VAH MUZ-FD50VA
INDOOR UNIT OUTDOOR UNIT
Wet and dry-bulb
thermometers
FRONT VIEW
Wet and dry-bulb
thermometers
BACK VIEW
8-1. CAPACITY AND INPUT CURVES
PERFORMANCE CURVES8
Cooling capacity ( at Rated frequency)
0.9
1.0
1.1
1.2
1.3
1.4
1.5
-10-5 0 5 1015202530354045
Outdoor intake air Dry-bulb temperature(°C)
Capacity correction factors
26
24
20
18
22
Indoor intake air Wet-bulb
temperature( )
MUZ-FD35VAH
Indoor air Wet-bulb temperature
difference (°C)
MUZ-FD25VAH
6.5
6.0
5.5
5.1
4.6
4.1
3.7
9.1
8.4
7.7
7.0
6.3
5.7
5.1
10.1
9.3
8.5
7.7
7.0
6.3
5.6
MUZ-FD50VA
MUZ-FD25VA
MUZ-FD35VA

NOTE: The above broken lines are for the heating operation without any frost and defrost operation.
16
0.8
0.9
1.0
1.1
1.2
1.3
-10-5 0 5 1015202530354045
Outdoor intake air Dry-bulb temperature (°C)
Input correction factors
26
24 22
20
18
Indoor intake air Wet-bulb
temperature(°C)
Indoor air Wet-bulb temperature
difference (°C)
5.5
5.1
4.6
4.1
3.7
3.3
7.7
7.0
6.3
5.7
5.1
4.5
MUZ-FD35VAH
8.5
7.7
7.0
6.3
5.6
4.9
MUZ-FD50VA MUZ-FD25VAH
MUZ-FD25VA
MUZ-FD35VA
Total input (Cooling : at Rated frequency )
Indoor air Dry-bulb temperature
difference (°C)
17.3
16.0
14.6
13.3
12.0
10.6
9.3
8.0
6.7
5.3
20.9
19.3
17.7
16.1
14.5
12.9
11.3
9.7
8.0
6.4
MUZ-FD25VAH MUZ-FD35VAH
25.6
23.7
21.7
19.7
17.7
15.8
13.8
11.8
9.9
7.9
MUZ-FD50VA
MUZ-FD25VA
MUZ-FD35VA
Outdoor intake air Wet-bulb temperature (°C)
-20 -15 -10 -5 0 5 10 15
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3 Heating capacity (
at Rated frequency)
Capacity correction factor
15
20
26
Indoor intake air Dry-bulb temperature ( )
Indoor air Dry-bulb temperature
difference (°C)
MUZ-FD25VAH MUZ-FD35VAH
17.3
16.0
14.6
13.3
12.0
10.6
9.3
8.0
6.7
5.3
20.9
19.3
17.7
16.1
14.5
12.9
11.3
9.7
8.0
6.4
MUZ-FD50VA
25.6
23.7
21.7
19.7
17.7
15.8
13.8
11.8
9.9
7.9
MUZ-FD25VA
MUZ-FD35VA
Outdoor intake air Wet-bulb temperature (°C)
-20 -15 -10 -5 0 5 10 15
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3 Total input (Heating:
at Rated frequency )
Input correction factor
15
20
26
Indoor intake air Dry-bulb temperature (°C)

17
Correction of Cooling input
Input correction factors
The operational frequency of compressor
Correction of Cooling capacity
Capacity correction factors
The operational frequency of compressor
Correction of Cooling capacity
Capacity correction factors
The operational frequency of compressor
Correction of Cooling input
Input correction factors
The operational frequency of compressor
Correction of Heating input
The operational frequency of compressor
Correction of Heating capacity
Capacity correction factors
The operational frequency of compressor
Correction of Heating capacity
Capacity correction factors
The operational frequency of compressor
Input correction factors
MUZ-FD25VA MUZ-FD25VAH
MUZ-FD35VA
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0
2.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0
0 50 100 150(Hz)
0
1
2
3
4
Correction of Heating input
Capacity correction factors
The operational frequency of compressor
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0
0 50 100 150(Hz)
0
1
2
3
Correction of Cooling capacity
Capacity correction factors
The operational frequency of compressor
Correction of Cooling input
Input correction factors
The operational frequency of compressor
Correction of Heating capacity
Capacity correction factors
The operational frequency of compressor
MUZ-FD35VAH Correction of Heating input
Capacity correction factors
The operational frequency of compressor
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
0 50 100 150(Hz)
0.0
0.5
1.0
1.5
2.0
0 50 100 150(Hz)
0
1
2
3
8-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR
Correction of Cooling capacity
Capacity correction factors
The operational frequency of
compressor (Hz) The operational frequency of compressor (Hz) The operational frequency of compressor (Hz) The operational frequency of compressor (Hz)
Correction of Cooling input
Input correction factors
Correction of Heating capacity
Capacity correction factors
MUZ-FD50VA Correction of Heating input
Capacity correction factors
0.0
0.5
1.0
1.5
0 50 100
0.0
0.5
1.0
1.5
2.0
0 50 100
0.0
0.5
1.0
1.5
0 50 100 150
0.0
0.5
1.0
1.5
2.0
0 50 100 150

18
kgf/cm2[Gauge]
MPa [Gauge]
Ambient temperature(°C)
Ambient humidity(%)
kgf/cm2[Gauge]
MPa [Gauge]
Ambient temperature(°C)
Ambient humidity(%)
kgf/cm2[Gauge]
MPa [Gauge]
Ambient temperature(°C)
Ambient humidity(%)
Outdoor low pressure
MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA MUZ-FD35VAH
0.2
0.4
0.6
0.8
1.0
1.2
1.4
15 20 25 30 35
50 60 70
4
6
8
10
12
14
0.2
0.4
0.6
0.8
1.0
1.2
1.4
15 20 25 30 35
50 60 70
4
6
8
10
12
14
0.2
0.4
0.6
0.8
1.0
1.2
1.4
15 20 25 30 35
50 60 70
4
6
8
10
12
14
COOL operation
Both indoor and outdoor unit are under the same temperature/
humidity condition.
Operation: TEST RUN OPERATION (Refer to 8-3.)
8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
NOTE:
The unit of pressure has been changed to MPa on the international system of units (SI unit system)
The conversion factor is: 1 (MPa [Gauge]) = 10.2 (kgf/cm2[Gauge])
Dry-bulb temperature (°C) Relative humidity (%)
20 50
25 60
30 70
8-3. TEST RUN OPERATION (How to operate fixed-frequency operation)
1. Press EMERGENCY OPERATION switch to start COOL or HEAT mode (COOL: Press once, HEAT: Press twice).
2. Test run operation starts and continues to operate for 30 minutes.
3. Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode.
4. Indoor fan operates at High speed.
5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (operation frequency of compressor var-
ies).
6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on
remote controller.
kgf/cm2[Gauge]
MPa [Gauge]
Ambient temperature(°C)
Ambient humidity(%)
MUZ-FD50VA
0.2
0.4
0.6
0.8
1.0
1.2
1.4
15 20 25 30 35
50 60 70
4
6
8
10
12
14

19
(A) (A)
Ambient temperature(°C) Ambient temperature(°C)
MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA
Outdoor unit current
(A)
Ambient temperature(°C)
MUZ-FD35VAH
6.0
5.5
5.0
4.5
4.0 5 10152025
6.0
5.5
5.0
4.5
4.0 2510152025
6.0
5.5
5.0
4.5
4.0 25 10152025
Condition:
Operation: Test run operation (Refer to 8-3.)
HEAT operation
Indoor Outdoor
Dry bulb temperature (°C) 20.0 2 7 15 20.0
Wet bulb temperature (°C) 14.5 1 6 12 14.5
3230
70 (%)
35(°C)
Ambient temperature(°C)
Ambient humidity(%)
15 20
50 25 60
2.5
3.0
3.5
4.0
18
MUZ-FD25VA MUZ-FD25VAH MUZ-FD35VA
15 20
50 25 60
1.8
2.0
2.2
2.4
18
(A) (A)
Outdoor unit current
Ambient temperature(°C)
Ambient humidity(%)
3230
70 (%)
35(°C)
Ambient temperature(°C)
Ambient humidity(%)
15 20
50 25 60
2.5
3.0
3.5
4.0
18
MUZ-FD35VAH
(A)
3230
70 (%)
35(°C)
Ambient temperature (°C)
Ambient humidity (%)
MUZ-FD50VA
(A)
4.5
5.0
5.5
6.0
6.5
15 20 25 30 35
50 60 70
(A)
Ambient temperature (°C)
MUZ-FD50VA
6.0
6.5
7.0
7.5
8.0
8.5
02 5 10 15 20 25

2020
PERFORMANCE DATA COOL operation at Rated frequency
MUZ-FD25VA MUZ-FD25VAH
CAPACITY: 2.5 kW SHF: 0.85 INPUT: 485 W
INDOOR
DB (°C)
INDOOR
WB (°C)
OUTDOOR DB (°C)
21 25 27 30
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
21 18 2.94 1.97 0.67 388 2.81 1.88 0.67 407 2.70 1.81 0.67 427 2.60 1.74 0.67 446
21 20 3.06 1.68 0.55 407 2.94 1.62 0.55 432 2.85 1.57 0.55 441 2.75 1.51 0.55 461
22 18 2.94 2.09 0.71 388 2.81 2.00 0.71 407 2.70 1.92 0.71 427 2.60 1.85 0.71 446
22 20 3.06 1.81 0.59 407 2.94 1.73 0.59 432 2.85 1.68 0.59 441 2.75 1.62 0.59 461
22 22 3.19 1.50 0.47 422 3.08 1.45 0.47 449 3.00 1.41 0.47 461 2.88 1.35 0.47 480
23 18 2.94 2.20 0.75 388 2.81 2.11 0.75 407 2.70 2.03 0.75 427 2.60 1.95 0.75 446
23 20 3.06 1.93 0.63 407 2.94 1.85 0.63 432 2.85 1.80 0.63 441 2.75 1.73 0.63 461
23 22 3.19 1.63 0.51 422 3.08 1.57 0.51 449 3.00 1.53 0.51 461 2.88 1.47 0.51 480
24 18 2.94 2.32 0.79 388 2.81 2.22 0.79 407 2.70 2.13 0.79 427 2.60 2.05 0.79 446
24 20 3.06 2.05 0.67 407 2.94 1.97 0.67 432 2.85 1.91 0.67 441 2.75 1.84 0.67 461
24 22 3.19 1.75 0.55 422 3.08 1.69 0.55 449 3.00 1.65 0.55 461 2.88 1.58 0.55 480
24 24 3.35 1.44 0.43 441 3.23 1.39 0.43 466 3.15 1.35 0.43 480 3.05 1.31 0.43 504
25 18 2.94 2.44 0.83 388 2.81 2.33 0.83 407 2.70 2.24 0.83 427 2.60 2.16 0.83 446
25 20 3.06 2.17 0.71 407 2.94 2.09 0.71 432 2.85 2.02 0.71 441 2.75 1.95 0.71 461
25 22 3.19 1.88 0.59 422 3.08 1.81 0.59 449 3.00 1.77 0.59 461 2.88 1.70 0.59 480
25 24 3.35 1.57 0.47 441 3.23 1.52 0.47 466 3.15 1.48 0.47 480 3.05 1.43 0.47 504
26 18 2.94 2.56 0.87 388 2.81 2.45 0.87 407 2.70 2.35 0.87 427 2.60 2.26 0.87 446
26 20 3.06 2.30 0.75 407 2.94 2.20 0.75 432 2.85 2.14 0.75 441 2.75 2.06 0.75 461
26 22 3.19 2.01 0.63 422 3.08 1.94 0.63 449 3.00 1.89 0.63 461 2.88 1.81 0.63 480
26 24 3.35 1.71 0.51 441 3.23 1.64 0.51 466 3.15 1.61 0.51 480 3.05 1.56 0.51 504
26 26 3.45 1.35 0.39 466 3.35 1.31 0.39 490 3.30 1.29 0.39 504 3.20 1.25 0.39 519
27 18 2.94 2.67 0.91 388 2.81 2.56 0.91 407 2.70 2.46 0.91 427 2.60 2.37 0.91 446
27 20 3.06 2.42 0.79 407 2.94 2.32 0.79 432 2.85 2.25 0.79 441 2.75 2.17 0.79 461
27 22 3.19 2.14 0.67 422 3.08 2.06 0.67 449 3.00 2.01 0.67 461 2.88 1.93 0.67 480
27 24 3.35 1.84 0.55 441 3.23 1.77 0.55 466 3.15 1.73 0.55 480 3.05 1.68 0.55 504
27 26 3.45 1.48 0.43 466 3.35 1.44 0.43 490 3.30 1.42 0.43 504 3.20 1.38 0.43 519
28 18 2.94 2.79 0.95 388 2.81 2.67 0.95 407 2.70 2.57 0.95 427 2.60 2.47 0.95 446
28 20 3.06 2.54 0.83 407 2.94 2.44 0.83 432 2.85 2.37 0.83 441 2.75 2.28 0.83 461
28 22 3.19 2.26 0.71 422 3.08 2.18 0.71 449 3.00 2.13 0.71 461 2.88 2.04 0.71 480
28 24 3.35 1.98 0.59 441 3.23 1.90 0.59 466 3.15 1.86 0.59 480 3.05 1.80 0.59 504
28 26 3.45 1.62 0.47 466 3.35 1.57 0.47 490 3.30 1.55 0.47 504 3.20 1.50 0.47 519
29 18 2.94 2.91 0.99 388 2.81 2.78 0.99 407 2.70 2.67 0.99 427 2.60 2.57 0.99 446
29 20 3.06 2.66 0.87 407 2.94 2.56 0.87 432 2.85 2.48 0.87 441 2.75 2.39 0.87 461
29 22 3.19 2.39 0.75 422 3.08 2.31 0.75 449 3.00 2.25 0.75 461 2.88 2.16 0.75 480
29 24 3.35 2.11 0.63 441 3.23 2.03 0.63 466 3.15 1.98 0.63 480 3.05 1.92 0.63 504
29 26 3.45 1.76 0.51 466 3.35 1.71 0.51 490 3.30 1.68 0.51 504 3.20 1.63 0.51 519
30 18 2.94 2.94 1.00 388 2.81 2.81 1.00 407 2.70 2.70 1.00 427 2.60 2.60 1.00 446
30 20 3.06 2.79 0.91 407 2.94 2.67 0.91 432 2.85 2.59 0.91 441 2.75 2.50 0.91 461
30 22 3.19 2.52 0.79 422 3.08 2.43 0.79 449 3.00 2.37 0.79 461 2.88 2.27 0.79 480
30 24 3.35 2.24 0.67 441 3.23 2.16 0.67 466 3.15 2.11 0.67 480 3.05 2.04 0.67 504
30 26 3.45 1.90 0.55 466 3.35 1.84 0.55 490 3.30 1.82 0.55 504 3.20 1.76 0.55 519
31 18 2.94 2.94 1.00 388 2.81 2.81 1.00 407 2.70 2.70 1.00 427 2.60 2.60 1.00 446
31 20 3.06 2.91 0.95 407 2.94 2.79 0.95 432 2.85 2.71 0.95 441 2.75 2.61 0.95 461
31 22 3.19 2.65 0.83 422 3.08 2.55 0.83 449 3.00 2.49 0.83 461 2.88 2.39 0.83 480
31 24 3.35 2.38 0.71 441 3.23 2.29 0.71 466 3.15 2.24 0.71 480 3.05 2.17 0.71 504
31 26 3.45 2.04 0.59 466 3.35 1.98 0.59 490 3.30 1.95 0.59 504 3.20 1.89 0.59 519
32 18 2.94 2.94 1.00 388 2.81 2.81 1.00 407 2.70 2.70 1.00 427 2.60 2.60 1.00 446
32 20 3.06 3.03 0.99 407 2.94 2.91 0.99 432 2.85 2.82 0.99 441 2.75 2.72 0.99 461
32 22 3.19 2.77 0.87 422 3.08 2.68 0.87 449 3.00 2.61 0.87 461 2.88 2.50 0.87 480
32 24 3.35 2.51 0.75 441 3.23 2.42 0.75 466 3.15 2.36 0.75 480 3.05 2.29 0.75 504
32 26 3.45 2.17 0.63 466 3.35 2.11 0.63 490 3.30 2.08 0.63 504 3.20 2.02 0.63 519
NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature