Mitsubishi Electric MUZ-EF25VE-E1 User manual

NOTE:
RoHS compliant products have <G> mark on the spec name plate.
OUTDOOR UNIT No. OBH590
REVISED EDITION-G
HFC
utilized
R410A
SERVICE MANUAL
Indoor unit service manual
MSZ-EF•VE Series (OBH589)
PARTS CATALOG (OBB590)
MUZ-EF25VE MUZ-EF25VEH
MUZ-EF35VE MUZ-EF35VEH
MUZ-EF42VE
Please void OBH590 REVISED EDITION-F.
Models
MUZ-EF25VE -E1 ,E2 ,E3 ,E4 ,E5 ,ER3 ,ER4 ,ER5 ,ET3 ,ET4 ,ET5
MUZ-EF25VEH -E1 ,E2 ,E3 ,E4 ,ER2 ,ER3 ,ET2 ,ET3
MUZ-EF35VE -E1 ,E2 ,E3 ,E4 ,E5 ,ER3 ,ER4 ,ER5 ,ET3 ,ET4 ,ET5
MUZ-EF35VEH -E1 ,E2 ,E3 ,E4 ,ER2 ,ER3 ,ET2 ,ET3
MUZ-EF42VE -E1 ,E2 ,E3 ,E4 ,E5 ,ER3 ,ER4 ,ER5 ,ET3 ,ET4 ,ET5
MUZ-EF50VE -E1 ,E2 ,E3 ,ER2 ,ER3 ,ET2 ,ET3
Revision G:
• MUZ-EF25/35/42VE - E5 , ER5, ET5 ,MUZ-EF50VE -
E3 , ER3, ET3 and MUZ-EF25/35VEH - E4 have been
added.
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 5
3. SPECIFICATION················································ 6
4. NOISE CRITERIA CURVES······························ 8
5. OUTLINES AND DIMENSIONS ························ 9
6. WIRING DIAGRAM·········································· 10
7. REFRIGERANT SYSTEM DIAGRAM············· 15
8. PERFORMANCE CURVES····························· 17
9. ACTUATOR CONTROL··································· 31
10. SERVICE FUNCTIONS···································· 32
11. TROUBLESHOOTING····································· 32
12. DISASSEMBLY INSTRUCTIONS···················· 51

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.
Revision A:
• " TROUBLESHOOTING" has been corrected (11-2,11-5).
• "Specifications and rated conditions of main electric parts" has been corrected. (3)
Revision B:
• MUZ-EF25/35/42/50VE - E2 and MUZ-EF25/35VEH - E2 have been added.
Revision C:
• MUZ-EF25/35/42VE - E3 , MUZ-EF25/35/42VE - ER3 , MUZ-EF50VE - ER2 and MUZ-EF25/35VEH - ER2 have been added.
Revision D:
• MUZ-EF25/35/42VE - ET3 , MUZ-EF50VE - ET2 and MUZ-EF25/35VEH - ET2 have been added.
Revision E:
• MUZ-EF25/35/42VE - E4 , ER4, ET4 and MUZ-EF25/35VEH - E3 , ER3, ET3 have been added.
Revision F:
• The descriptions of the expansion valve coil have been corrected. (11-4.)
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 G:
• MUZ-EF25/35/42VE - E5 , ER5, ET5 ,MUZ-EF50VE - E3 , ER3, ET3 and MUZ-EF25/35VEH - E4 have been added.
OBH590G

3
MUZ-EF25VE - E1
MUZ-EF25VEH - E1
MUZ-EF35VE - E1
MUZ-EF35VEH - E1
MUZ-EF42VE - E1
MUZ-EF50VE - E1
1. New model
MUZ-EF25VE - E1 MUZ-EF25VE - E2
MUZ-EF25VEH - E1 MUZ-EF25VEH - E2
MUZ-EF35VE - E1 MUZ-EF35VE - E2
MUZ-EF35VEH - E1 MUZ-EF35VEH - E2
MUZ-EF42VE - E1 MUZ-EF42VE - E2
MUZ-EF50VE - E1 MUZ-EF50VE - E2
1. Inverter P.C. board has been changed.
MUZ-EF25VE - E2 MUZ-EF25VE - E3
MUZ-EF35VE - E2 MUZ-EF35VE - E3
MUZ-EF42VE - E2 MUZ-EF42VE - E3
1. Condenser net has been changed.
MUZ-EF25VE - ER3
MUZ-EF25VEH - ER2
MUZ-EF35VE - ER3
MUZ-EF35VEH - ER2
MUZ-EF42VE - ER3
MUZ-EF50VE - ER2
1. New model
MUZ-EF25VE - ET3
MUZ-EF25VEH - ET2
MUZ-EF35VE - ET3
MUZ-EF35VEH - ET2
MUZ-EF42VE - ET3
MUZ-EF50VE - ET2
1. New model
MUZ-EF25VE - E3 MUZ-EF25VE - E4
MUZ-EF25VEH - E2 MUZ-EF25VEH - E3
MUZ-EF35VE - E3 MUZ-EF35VE - E4
MUZ-EF35VEH - E2 MUZ-EF35VEH - E3
MUZ-EF42VE - E3 MUZ-EF42VE - E4
1. Outdoor fan motor has been changed.
2. Inverter P.C. board has been changed.
MUZ-EF25VE - ER3 MUZ-EF25VE - ER4
MUZ-EF25VEH - ER2 MUZ-EF25VEH - ER3
MUZ-EF35VE - ER3 MUZ-EF35VE - ER4
MUZ-EF35VEH - ER2 MUZ-EF35VEH - ER3
MUZ-EF42VE - ER3 MUZ-EF42VE - ER4
1. Outdoor fan motor has been changed.
2. Inverter P.C. board has been changed.
TECHNICAL CHANGES
1
OBH590G

4
MUZ-EF25VE - ET3 MUZ-EF25VE - ET4
MUZ-EF25VEH - ET2 MUZ-EF25VEH - ET3
MUZ-EF35VE - ET3 MUZ-EF35VE - ET4
MUZ-EF35VEH - ET2 MUZ-EF35VEH - ET3
MUZ-EF42VE - ET3 MUZ-EF42VE - ET4
1. Outdoor fan motor has been changed.
2. Inverter P.C. board has been changed.
MUZ-EF25VE - E4 MUZ-EF25VE - E5
MUZ-EF25VEH - E3 MUZ-EF25VEH - E4
MUZ-EF35VE - E4 MUZ-EF35VE - E5
MUZ-EF35VEH - E3 MUZ-EF35VEH - E4
MUZ-EF42VE - E4 MUZ-EF42VE - E5
MUZ-EF50VE - E2 MUZ-EF50VE - E3
1. Model name has been changed.
MUZ-EF25VE - ER4 MUZ-EF25VE - ER5
MUZ-EF35VE - ER4 MUZ-EF35VE - ER5
MUZ-EF42VE - ER4 MUZ-EF42VE - ER5
MUZ-EF50VE - ER2 MUZ-EF50VE - ER3
1. Model name has been changed.
MUZ-EF25VE - ET4 MUZ-EF25VE - ET5
MUZ-EF35VE - ET4 MUZ-EF35VE - ET5
MUZ-EF42VE - ET4 MUZ-EF42VE - ET5
MUZ-EF50VE - ET2 MUZ-EF50VE - ET3
1. Model name has been changed.
OBH590G

5
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
MUZ-EF25VE MUZ-EF25VEH
MUZ-EF35VE MUZ-EF35VEH
MUZ-EF42VE
PART NAMES AND FUNCTIONS
2
ACCESSORIES
MODELS
MUZ-EF25VE
MUZ-EF35VE
MUZ-EF42VE
MUZ-EF50VE
Drain socket 1
MUZ-EF50VE
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
OBH590G

6
SPECIFICATION
3
1 Measured under rated operating frequency.
2 MUZ-EF25/35/42VE- E1 , E2 , E3 , ER3 , ET3
MUZ-EF25/35VEH- E1 , E2 , ER2 , ET2
3 MUZ-EF25/35/42VE- E4 , E5 , ER4 , ER5 , ET4 , ET5 /
MUZ-EF25/35VEH- E3 , E4 , ER3 , ET3
Outdoor model MUZ-EF25VE
MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE
Power supply Single phase, 230 V, 50 Hz
Capacity
Rated frequency (Min.-Max.) Cooling kW 2.5 (1.2 - 3.4) 3.5 (1.4 - 4.0) 4.2 (0.9 - 4.6) 5.0 (1.4 - 5.4)
Heating 3.2 (1.1 - 4.2) 4.0 (1.8 - 5.5) 5.4 (1.4 - 6.3) 5.8 (1.6 - 7.5)
Breaker Capacity A 10 16
Electrical data
Power input 1 (Set) Cooling W545 910 1,280 1,560
Heating 700 955 1,460 1,565
Running current 1
(Set) Cooling A2.9 4.2 5.7 6.9
Heating 3.5 4.4 6.5 7.0
Power factor 1 (Set) Cooling %81 94 97 98
Heating 86 94 97 97
Starting current 1 (Set) A 3.5 4.4 6.5 7.0
Coefficient of performance
(COP) 1 (Set) Cooling 4.59 3.85 3.28 3.21
Heating 4.57 4.19 3.70 3.71
Compressor
Model KNB073FKFMC KNB092FFAMC SNB130FGAMT SNB130FGBMT
Output W 550 650 900
Current 1Cooling A2.76 4.06 5.56 5.58
Heating 3.24 4.09 6.19 5.75
Refrigeration oil (Model) L 0.31 (FV50S) 0.27(FV50S) 0.35 (FV50S)
Fan motor Model RC0J50-FA 2RC0J60-BD
RC0J50-NA 3
Current 1 Cooling A0.24 0.29 0.30 0.84
Heating 0.27 0.28 0.28 0.93
Dimensions W × H × D mm 800 × 550 × 285 840 × 880 × 330
Weight kg 30 35 54
Special remarks
Dehumidification Cooling L/h 0.3 1.0 1.7 2.1
Air flow 1
Cooling High
m3/h
1,806 2,868
Low 1,170 1,038 1,602
Heating High 2,106 2,016 2,778 Med. 1,806 1,710 2,778
Low 1,452 1,326 2,124
Sound level 1Cooling dB(A) 47 49 50 52
Heating 48 50 51 52
Fan speed
Cooling High
rpm
740 810 840
Low 740 490 480
Heating High 860 900 810 Med. 740 770 810
Low 600 610 620
Fan speed regulator 3
Refrigerant filling capacity (R410A) kg 0.80 1.15 1.45
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
OBH590G

7
Specifications and rated conditions of main electric parts
Model
Item
MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE
Smoothing
capacitor (C61, C62) 600 μF/620 μF 420 V
(C63) — 600 μF/620 μF 420 V
Diode module (DB61) 15 A 600 V 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 (IC700) 15 A 600 V 20 A 600 V
(IC932) 8A600V
Expansion valve
coil (LEV) 12 V DC
Reactor (L61) 18 mH 23 mH
Power factor
controller (IC820) 20A 600V
Current-limiting
PTC thermistor (PTC64, PTC65) 33 Ω
Terminal block (TB) 5 P
Relay
(X63) 3 A 250 V
(X64) 20 A 250 V
(X66) — 3 A 250 V — 3 A 250 V
(X69) 10A 230V
R.V.coil (21S4) 220 - 240 V AC
Heater protector (26H) — Open 45°C — Open 45°C — —
OBH590G

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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
50
NC-10
51
MUZ-EF42VE
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
52
NC-10
52
MUZ-EF50VE
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
48
NC-10
MUZ-EF25VE MUZ-EF25VEH
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
49
50
NC-10
MUZ-EF35VE MUZ-EF35VEH
NOISE CRITERIA CURVES
4
Test conditions
Cooling: Dry-bulb temperature 35°C
Heating: Dry-bulb temperature 7°C Wet-bulb temperature 6°C
OUTDOOR UNIT
MICROPHONE
1 m
OBH590G

9
Unit: mm
MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE
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 X 21
Drain hole ø42 (MUZ-EF25/35/42VE)
Drain hole ø33 (MUZ-EF25/35VEH)
REQUIRED SPACE
350 mm or more
100 mm or more
100 mm or more
*1 100 mm or more when front
and sides of the unit are clear
*2 When any 2 sides of left, right
and rear of the unit are clear
Clear *1
200 mm or
more *2
MUZ-EF50VE
OUTLINES AND DIMENSIONS
5
417.5
40
42
Drain hole
175 500
330
50
Air in
Air out 2-holes 10 21
360
840
109 81
880
452
Service panel
99.5
164.5
195
35
44
Liquid refrigerant pipe joint
Refrigerant pipe (flared) Ø 6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø 12.7
350 mm or more
100 mm or more
REQUIRED SPACE
100 mm or more
500 mm
or more *2
*1 500 mm or more when front
and sides of the unit are clear
*2 When any 2 sides of left, right
and rear of the unit are clear
Clear *1
OBH590G

10
WIRING DIAGRAM
6
MUZ-EF25VE - E1 ,E2 MUZ-EF35VE - E1 ,E2
MUZ-EF25VE - E3 , E4 , ER3 , ER4 , ET3 , ET4
MUZ-EF35VE - E3 , E4 , ER3 , ER4 , ET3 , ET4
OBH590G

11
MUZ-EF25VE - E5 , ER5 , ET5
MUZ-EF35VE - E5 , ER5 , ET5
MUZ-EF25VEH - E1 , MUZ-EF35VEH - E1
OBH590G

12
MUZ-EF25VEH - E4
MUZ-EF35VEH - E4
MUZ-EF25VEH - E2 , E3 , ER2 , ER3 , ET2 , ET3
MUZ-EF35VEH - E2 , E3 , ER2 , ER3 , ET2 , ET3
OBH590G

13
MUZ-EF42VE - E1 MUZ-EF50VE - E1
MUZ-EF42VE - E2 , E3 , E4 , ER3 , ER4 , ET3 , ET4
MUZ-EF50VE - E2 , ER2 , ET2
OBH590G

14
MUZ-EF42VE - E5 , ER5 , ET5
MUZ-EF50VE - E3 , ER3 , ET3
OBH590G

15
Unit: mm
MUZ-EF25VE MUZ-EF25VEH
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
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
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
ø3.0×ø2.0×240
Outdoor heat
exchanger
temperature
thermistor
RT68
Muffler
REFRIGERANT SYSTEM DIAGRAM
7
Unit: mm
MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
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
ø3.0×ø1.8×600(×2)
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
ø3.0×ø2.0×240
Outdoor heat
exchanger
temperature
thermistor
RT68
Muffler
OBH590G

16
MUZ-EF50VE Unit: mm
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
ø 4.0 × ø 2.4 × 100 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
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Muffler
Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Models Refrigerant piping: m Piping size O.D: mm
Max. Length A Max. Height difference B Gas Liquid
MUZ-EF25/35/42 20 12 9.52 6.35
MUZ-EF50 30 15 12.7
ADDITIONAL REFRIGERANT CHARGE (R410A: g)
Models Outdoor unit
precharged Refrigerant piping length (one way)
7 m 8 m 9 m 10 m 11 m 12 m 13 m 14 m 15 m 20 m
MUZ-EF25 800 0 30 60 90 120 150 180 210 240 390
MUZ-EF35/42 1,150
Calculation: X g = 30 g/m × (Refrigerant piping length (m) – 7)
Model Outdoor unit
precharged Refrigerant piping length (one way)
7 m 10 m 15 m 20 m 25 m 30 m
MUZ-EF50 1,450 0 60 160 260 360 460
Calculation: X g = 20 g/m × (Refrigerant piping length (m) – 7)
NOTE: Refrigerant piping exceeding 7 m requires additional refrigerant charge according to the calculation.
OBH590G

17
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 and dry bulb temperature difference on the left side of the following chart shows the difference between the
indoor intake air wet and dry bulb temperature and the indoor outlet air wet and dry bulb temperature for your reference at
service.
How to measure the indoor air wet and 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-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE
INDOOR UNIT OUTDOOR UNIT
Wet and dry bulb
thermometers
FRONT VIEW
Wet and dry bulb
thermometers
BACK VIEW
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( )
13.8
12.7
11.5
10.5
9.4
8.4
7.4
MUZ-EF50VE MUZ-EF42VE MUZ-EF35VE MUZ-EF35VEH
MUZ-EF25VE MUZ-EF25VEH
Indoor air Wet-bulb temperature
difference (°C)
7.2
6.7
6.1
5.6
5.1
4.6
4.1
10.7
9.9
9.0
8.2
7.4
6.7
5.9
15.8
14.4
13.1
11.8
10.6
9.5
8.4
8-1. CAPACITY AND INPUT CURVES
PERFORMANCE CURVES8
OBH590G

18
NOTE: The above broken lines are for the heating operation without any frost and defrost operation.
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( )
Indoor air Wet-bulb temperature
difference (°C)
6.1
5.6
5.1
4.6
4.1
3.6
9.0
8.2
7.4
6.7
5.9
5.2
11.5
10.5
9.4
8.4
7.4
6.5
13.1
11.8
10.6
9.5
8.4
7.3
MUZ-EF50VE MUZ-EF42VE MUZ-EF35VE MUZ-EF35VEH MUZ-EF25VE MUZ-EF25VEH
Total input (Cooling : at Rated frequency )
Indoor air Dry-bulb temperature
difference (°C)
17.6
16.2
14.9
13.5
12.2
10.8
9.5
8.1
6.8
5.4
27.8
25.7
23.5
21.4
19.2
17.1
15.0
12.8
10.7
8.6
28.7
26.5
24.3
22.1
19.9
17.7
15.5
13.3
11.1
8.8
MUZ-EF50VE MUZ-EF42VE MUZ-EF25VEH MUZ-EF35VE
20.6
19.0
17.4
15.8
14.3
12.7
11.1
9.5
7.9
6.3
MUZ-EF35VEH MUZ-EF25VE
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)
17.6
16.2
14.9
13.5
12.2
10.8
9.5
8.1
6.8
5.4
MUZ-EF50VE MUZ-EF42VE MUZ-EF35VEH MUZ-EF25VE
20.6
19.0
17.4
15.8
14.3
12.7
11.1
9.5
7.9
6.3
MUZ-EF35VEH MUZ-EF35VE
27.8
25.7
23.5
21.4
19.2
17.1
15.0
12.8
10.7
8.6
28.7
26.5
24.3
22.1
19.9
17.7
15.5
13.3
11.1
8.8
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 ( )
Lower limit of guaranteed
operating range in heating
MUZ-EF25/35/42/50VE: -15°C
MUZ-EF25/35VEH : -20°C
OBH590G

19
8-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR
0 50 100
0.5
1.0
1.5
0 50 100
0.5
1.0
1.5
0 50 100
0.5
1.0
1.5
0 50 100
0.5
1.0
1.5
2.0
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
050100
150
0.5
1.0
1.5
2.0
0 50 100
0.5
1.0
1.5
0 50 100
0.5
1.0
1.5
2.0
0 50 100
0.5
1.0
1.5
0 50 100
1
2
3
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
2.0
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
2.0
MUZ-EF25VE MUZ-EF25VEH
MUZ-EF35VE MUZ-EF35VEH
Correction of Cooling capacity
Capacity correction factors
Correction of Cooling input
Input correction factors
Correction of Heating capacity
Capacity correction factors
MUZ-EF42VE Correction of Heating input
Capacity correction factors
Correction of Cooling capacity
Capacity correction factors
Correction of Cooling input
Input correction factors
Correction of Heating capacity
Capacity correction factors
MUZ-EF50VE Correction of Heating input
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) 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 capacity
The operational frequency
of compressor (Hz)
Capacity correction factors
Correction of Cooling input
The operational frequency
of compressor (Hz)
Input correction factors
Correction of Heating capacity
The operational frequency
of compressor (Hz)
Capacity correction factors
Correction of Heating input
The operational frequency
of compressor (Hz)
Input correction factors
Correction of Cooling capacity
The operational frequency
of compressor (Hz)
Capacity correction factors
Correction of Cooling input
The operational frequency
of compressor (Hz)
Input correction factors
Correction of Heating capacity
The operational frequency
of compressor (Hz)
Capacity correction factors
Correction of Heating input
The operational frequency
of compressor (Hz)
Input correction factors
OBH590G

20
15 20 25 30 35
0.4
0.5
0.6
0.7
0.8
0.9
15 20 25 30 35
0.3
0.4
0.5
0.6
15 20 25 30 35
0.3
0.4
0.5
0.6
0.7
15 20 25 30 35
0.3
0.4
0.5
0.6
0.7
(kgf/cm2[Gauge])(MPa [Gauge])
6
5
4
7
8
9
(kgf/cm2[Gauge])(MPa [Gauge])
4
3
5
6
(kgf/cm2[Gauge])(MPa [Gauge])
3
5
4
6
7
(kgf/cm2[Gauge])(MPa [Gauge])
4
3
5
6
7
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
Outdoor low pressure
MUZ-EF25VE
MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE
MUZ-EF50VE
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
Dry-bulb temperature (°C) Relative humidity (%)
20 50
25 60
30 70
8-3. HOW TO OPERATE FIXED-FREQUENCY OPERATION
<Test run 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 varies).
6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on
remote controller.
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])
OBH590G