Mitsubishi Electric MUZ-SF25VE-E1 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. OBH629
REVISED EDITION-A
OUTDOOR UNIT
Indoor unit service manual
MSZ-SF•VE Series (OBH600)
PARTS CATALOG (OBB629)
MUZ-SF25VE MUZ-SF25VEH
MUZ-SF35VE MUZ-SF35VEH
MUZ-SF42VE MUZ-SF42VEH
MUZ-SF25VE -E1 MUZ-SF42VE -E1
MUZ-SF25VE -E2 MUZ-SF42VE -E2
MUZ-SF25VEH -E1 MUZ-SF42VEH -E1
MUZ-SF35VE -E1 MUZ-SF50VE -E1
MUZ-SF35VE -E2 MUZ-SF50VEH -E1
MUZ-SF35VEH -E1
Revision A:
• MUZ-SF25/35/42VE - E2 have been added.
Please void OBH629.

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:
• MUZ-SF25/35/42VE - E2 have been added.
OBH629A

3
MUZ-SF25VE - E1 MUZ-SF25VEH - E1
MUZ-SF35VE - E1 MUZ-SF35VEH - E1
MUZ-SF42VE - E1 MUZ-SF42VEH - E1
MUZ-SF50VE - E1 MUZ-SF50VEH - E1
1. New model
MUZ-SF25VE - E1 MUZ-SF25VE - E2
MUZ-SF35VE - E1 MUZ-SF35VE - E2
MUZ-SF42VE - E1 MUZ-SF42VE - E2
1. Condenser net has been changed. (Material: Plastic Steel wire)
TECHNICAL CHANGES
1
OBH629A

4
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
MUZ-SF25VE MUZ-SF25VEH
MUZ-SF35VE MUZ-SF35VEH
MUZ-SF42VE MUZ-SF42VEH
PART NAMES AND FUNCTIONS
2
ACCESSORIES
MODELS
MUZ-SF25VE
MUZ-SF35VE
MUZ-SF42VE
MUZ-SF50VE
Drain socket 1
MUZ-SF50VE MUZ-SF50VEH
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
OBH629A

5
Outdoor model MUZ-SF25VE
MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH
Power supply Single phase, 230 V, 50 Hz
Capacity
Rated frequency (Min.-Max.) Cooling kW 2.5 (0.9 - 3.4) 3.5 (1.1 - 3.8) 4.2 (0.8 - 4.5) 5.0 (1.4 - 5.4)
Heating 3.2 (1.0 - 4.1) 4.0 (1.3 - 4.6) 5.4 (1.3 - 6.0) 5.8 (1.6 - 7.3)
Breaker Capacity A 10 16
Electrical data
Power input 1 (Total) Cooling W600 1,080 1,340 1,660
Heating 780 1,030 1,580 1,700
Running current 1
(Total) Cooling A3.2 4.9 6.0 7.4
Heating 3.9 4.7 7.0 7.6
Power factor 1 (Total) Cooling %81 95 97 97
Heating 86 95 98 97
Starting current 1 (Total) A 3.9 4.9 7.0 7.6
Coefficient of performance
(COP) 1 (Total) Cooling 4.17 3.24 3.13 3.01
Heating 4.10 3.88 3.42 3.41
Compressor
Model KNB073FKVMC KNB092FNDMC SNB130FGAMT SNB130FGBMT
Output W 550 650 900 900
Current 1Cooling A3.04 4.74 5.84 7.22
Heating 3.70 4.48 6.78 7.33
Refrigeration oil (Model) L 0.32 (FV50S) 0.27 (FV50S) 0.35 (FV50S)
Fan motor Model RC0J50-FA RC0J60-BD
Current 1Cooling A0.20 0.24 0.30 0.84
Heating 0.29 0.30 0.28 0.93
Dimensions W × H × D mm 800 × 550 × 285 840 × 880 × 330
Weight kg 31 31 35 55
Special remarks
Dehumidification Cooling L/h 0.3 1.0 1.7 2.2
Air flow 1
Cooling High
m3/h
1,698 1,956 1,806 2,868
Low 1,698 1,806 1,038 1,602
Heating High 2,064 2,178 2,016 2,778 Med. 1,698 1,932 1,770 2,778
Low 1,350 1,476 1,326 2,124
Sound level 1 Cooling dB(A) 47 49 50 52
Heating 48 50 51 52
Fan speed
Cooling High
rpm
740 800 810 840
Low 740 740 490 480
Heating High 890 890 900 810 Med. 740 790 770 810
Low 600 610 610 620
Fan speed regulator 3
Refrigerant filling capacity (R410A) kg 0.7 0.8 1.15 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.
SPECIFICATION
3
OBH629A

6
Specifications and rated conditions of main electric parts
Model
Item
MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH
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 —230V 130W —230V 130W
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 — 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 — 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-SF25VE MUZ-SF25VEH
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-SF35VE MUZ-SF35VEH
NOISE CRITERIA CURVES
4
OBH629A

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-SF42VE MUZ-SF42VEH
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-SF50VE MUZ-SF50VEH
Test conditions
Cooling: Dry-bulb temperature 35°C
Heating: Dry-bulb temperature 7°C Wet-bulb temperature 6°C
OUTDOOR UNIT
MICROPHONE
1 m
OBH629A

8
Unit: mm
MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH
MUZ-SF42VE MUZ-SF42VEH
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-SF25/35/42VE)
Drain hole ø33 (MUZ-SF25/35/42VEH)
MUZ-SF50VE MUZ-SF50VEH
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
OBH629A

9
WIRING DIAGRAM
6
MUZ-SF25VE MUZ-SF35VE
MUZ-SF25VEH MUZ-SF35VEH
OBH629A

10
MUZ-SF42VE MUZ-SF50VE
MUZ-SF42VEH MUZ-SF50VEH
OBH629A