Mitsubishi MUZ-EF25VE User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. NOISE CRITERIA CURVES ······························ 6
5. OUTLINES AND DIMENSIONS ························ 8
6. WIRING DIAGRAM············································ 9
7. REFRIGERANT SYSTEM DIAGRAM ··············11
8. PERFORMANCE CURVES ····························· 13
9. ACTUATOR CONTROL··································· 27
10. SERVICE FUNCTIONS···································· 28
11. TROUBLESHOOTING ····································· 28
12. DISASSEMBLY INSTRUCTIONS···················· 45
Models
SPLIT-TYPE AIR CONDITIONERS
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH590
OUTDOOR UNIT
Indoor unit service manual
MSZ-EF•VE Series (OBH589)
PARTS CATALOG (OBB590)
MUZ-EF25VE MUZ-EF25VEH
MUZ-EF35VE MUZ-EF35VEH
MUZ-EF42VE
MUZ-EF25VE - E1
MUZ-EF25VEH - E1
MUZ-EF35VE - E1
MUZ-EF35VEH - E1
MUZ-EF42VE - E1
MUZ-EF50VE - E1

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.

3
MUZ-EF25VE - E1 MUZ-EF25VEH - E1
MUZ-EF35VE - E1 MUZ-EF35VEH - E1
MUZ-EF42VE - E1
MUZ-EF50VE - E1
1. New model
TECHNICAL CHANGES
1

4
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

5
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 (Total) Cooling W545 910 1,280 1,560
Heating 700 955 1,460 1,565
Running current 1
(Total)
Cooling A2.9 4.2 5.7 6.9
Heating 3.5 4.4 6.5 7.0
Power factor 1 (Total) Cooling %81 94 97 98
Heating 86 94 97 97
Starting current 1 (Total) A 3.5 4.4 6.5 7.0
Coefficient of performance
(COP) 1 (Total)
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 1 Cooling 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 RC0J60-BD
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 /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 1,770 2,778
Low 1,452 1,326 2,124
Sound level 1 Cooling 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
1 Measured under rated operating frequency.
SPECIFICATION
3

6
Specifications and rating conditions of main electric parts
Model
Item
MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE
Smoothing
capacitor (C61, C62, C63) 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
Expansion valve
coil (LEV) 12 V DC
Reactor (L61) 18 mH 23 mH
Power factor
controller (IC802) 20A 600V
Current-limiting
PTC thermistor (PTC64, PTC65) 33 Ω
Terminal block (TB) 3 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 — —
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
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

7
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
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
Test conditions
Cooling: Dry-bulb temperature 35°C
Heating: Dry-bulb temperature 7°C Wet-bulb temperature 6°C
OUTDOOR UNIT
MICROPHONE
1 m

8
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
REQUIRED SPACE
100 mm or more
350 mm or more
200 mm or more
100 mm or more
100 mm or more
Drain hole ø42 (MUZ-EF25/35/42VE)
Drain hole ø33 (MUZ-EF25/35VEH)
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) Ø6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø12.7
350 mm or more
100 mm or more
REQUIRED SPACE
500 mm or more
100 mm or more
500 mm or more

9
WIRING DIAGRAM
6
MUZ-EF25VEH MUZ-EF35VEH
MUZ-EF25VE MUZ-EF35VE

10
MUZ-EF42VE MUZ-EF50VE