Mitsubishi MUZ-HC25VA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. NOISE CRITERIA CURVES······························ 7
5. OUTLINES AND DIMENSIONS ························ 8
6. WIRING DIAGRAM············································ 9
7. REFRIGERANT SYSTEM DIAGRAM··············11
8. PERFORMANCE CURVES····························· 13
9. ACTUATOR CONTROL··································· 24
10. SERVICE FUNCTIONS···································· 25
11. TROUBLESHOOTING····································· 25
12. DISASSEMBLY INSTRUCTIONS···················· 40
Models
SPLIT-TYPE AIR CONDITIONERS
MUZ-HC25VA - E1
MUZ-HC35VA - E1
MUZ-HC35VA - E2
MUZ-HC35VAB - E1
MUZ-HC35VAB - E2
HFC
utilized
R410A
No. OBH467
REVISED EDITION-B
OUTDOOR UNIT
Indoor unit service manual
MSZ-HC•VA Series (OBH466)
MSZ-CHC•VA Series (OBH522)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB467)
Revision B:
• MUZ-HC35VA- E2 and MUZ-HC35VAB- E2 have
been added.
Please void OBH467 REVISED EDITION-A.

2
Revision A:
•Table “ADDITIONAL REFRIGERANT CHARGE” of “7. REFRIGERANT SYSTEM DIAGRAM” has been corrected.
Revision B:
• MUZ-HC35VA- E2 and MUZ-HC35VAB- E2 have been added.

3
MUZ-HA25VA - E1 →MUZ-HC25VA - E1
MUZ-HA35VA - E1 →MUZ-HC35VA - E1
MUZ-HA35VA - E1 →MUZ-HC35VAB - E1
1. Outdoor model has been changed.
MUZ-HC35VA - E1 →MUZ-HC35VA - E2
MUZ-HC35VAB - E1 →MUZ-HC35VAB - E2
1. REFRIGERANT SYSTEM has been changed.
1TECHNICAL CHANGES

4
ACCESSORIES
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB
Drain socket 1
2PART NAMES AND FUNCTIONS

5
Outdoor model MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB
Function Cooling Heating Cooling Heating Cooling Heating
Power supply Single phase 230 V, 50 Hz
Capacity
Rated frequency (Min.-Max.) kW 2.5 (0.9-3.0) 3.2 (0.9-4.4) 3.15 (1.0-3.7) 3.6 (0.9-4.8) 3.4 (1.0-3.7) 3.6 (0.9-4.8)
Electrical data
Breaker capacity A 10
Running current 1 (Total) A 3.7 4.2 4.8 4.8 5.3 4.8
Power input 1 (Total) W 770 880 980 995 1130 995
Power factor 1 (Total) % 90 91 89 90 93 90
Starting current 1 (Total) A 4.2 4.8 5.3
Coefficient of performance (C.O.P) 1 (Total) 3.25 3.64 3.21 3.62 3.01 3.62
Compressor Model KNB065FDTH(C)
E1 KNB073FEDH
KNB073FGDH
E2 KNB073FGDHC
Output W 500 550
Current 1 A 3.24 3.74 4.34 4.34 4.84 4.34
Fan motor Model RA6V21-AB or BB or BD
Current 1 A 0.24
Dimensions W × H × D mm 684 × 540 × 255
Weight kg 25
Special remarks
Dehumidification /h 1.4 - 2.0 - 2.0 -
Air flow 1 m3/h 1,812 1,788 1,800 1,776 1,800 1,776
Sound level 1 dB(A) 46 47 47 48 47 48
Fan speed rpm 810 800 800 790 800 790
Fan speed regulator 1
Refrigerant filling capacity (R410A) kg 0.73 0.75
Refrigeration oil (Model) NEO22
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.
3SPECIFICATION

6
Specifications and rating conditions of main electric parts
Model
Item MUZ-HC25
MUZ-HC35VA- E1
MUZ-HC35VAB- E1
MUZ-HC35VA- E2
MUZ-HC35VAB- E2
Current transformer (CT) 20 A
Smoothing capacitor (C61, C62) 500 μF 420 V
Diode module (DB61) 15 A 600 V
(DB65) 10 A 600 V
Fuse (F61) T20AL250V
(F701, F801) T3.15AL250V
Intelligent power module (IPM) 10 A 600 V
Expansion valve coil (LEV) — DC 12 V
Reactor (L61) 18 mH 7 A
Current-detecting resistor (R61) 45 mΩ5 W
(R825) 25 mΩ5 W
Current-limiting PTC thermistor (PTC64) 33 Ω
Terminal block (TB1,TB2) 3 P
Relay (X61) 5 A 250 V
(X63) 3 A 250 V
(X64) 20 A 250 V
R.V. coil (21S4) SHF-4-10W5
Outdoor fan motor thermal fuse Open 152°C (RA6V21-AB) or Open 126°C (RA6V21-BB or BD)
IGBT (TR821) 30 A 600 V

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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
46
47
MUZ-HC25VA
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
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
47
48
Test conditions
Cooling : Dry-bulb temperature 35°C
Heating : Dry-bulb temperature 7°C Wet-bulb temperature 6°C
OUTDOOR UNIT
MICROPHONE
1m
MUZ-HC35VA
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
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
47
48
MUZ-HC35VAB
4NOISE CRITERIA CURVES

8
20.8
144.6 89.6
255
145.5
Service panel
Service port
Air out
Liquid refrigerant pipe joint
Refrigerant pipe (flared) ø6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) ø9.52
43°
40°
REQUIRED SPACE Basically open 100 mm or more
without any obstruction in front
and on both sides of the unit.
350 mm or more
100 mm or more
100 mm or more
100 mm or more
Open two sides of left,
right, or rear side.
Air in
Air in
381.5
Drain hole
ø
33
Bolt pitch for
installation
264-280
300
540
270
10
47.5
22.5
17.5
243
Bolt pitch for installation
500
684
61
105
Handle
2 holes 10 × 16
40
Unit : mm
MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB
5OUTLINES AND DIMENSIONS

9
MUZ-HC25VA MUZ-HC35VA-E1 MUZ-HC35VAB-E1
6WIRING DIAGRAM

10
MUZ-HC35VA-E2 MUZ-HC35VAB-E2