Mitsubishi Electric MUZ-SF25VE-E1, MUZ-SF25VEH-E1, MUZ-SF42VE-E1, MUZ-SF50VE-E1, MUZ-SF35VEH-E1 Service 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
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-SF25VEH
-
E1
MUZ-SF42VEH
-
E1
MUZ-SF35VE
-
E1
MUZ-SF50VE
-
E1
MUZ-SF35VEH
-
E1
MUZ-SF50VEH
-
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.
Use the specifi ed 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.
OBH629
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
TECHNICAL CHANGES
1
OBH629
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
OBH629
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
W
600 1,080 1,340 1,660
Heating 780 1,030 1,580 1,700
Running current
1
(Total)
Cooling
A
3.2 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
Coeffi cient 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
1
Cooling
A
3.04 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
1
Cooling
A
0.20 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
Dehumidifi cation Cooling /h 0.3 1.0 1.7 2.2
Air fl ow 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 fi lling 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
OBH629
6
Specifi cations 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) 620 μF 420 V
(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
—
230V
130W
—
230V
130W
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 — 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
OBH629
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
OBH629
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) Ø 6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø 12.7
350 mm or more
100 mm or more
REQUIRED SPACE
500 mm or more
100 mm or more
500 mm or more
OBH629
9
WIRING DIAGRAM
6
MUZ-SF25VEH MUZ-SF35VEH
MUZ-SF25VE MUZ-SF35VE
OBH629
10
MUZ-SF42VE MUZ-SF50VE
MUZ-SF42VEH MUZ-SF50VEH
OBH629
11
Unit: mm
MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH
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-SF42VE MUZ-SF42VEH
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
OBH629
12
MUZ-SF50VE MUZ-SF50VEH
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
Capillary tube
ø
4.0×ø
2.4×200
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe
ø
12.7
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
LEV
R.V. coil
heating ON
cooling OFF
Muffler
#100
Strainer
#100
Outdoor heat
exchanger
temperature
thermistor
RT68
Am
b
te
m
the
r
RT
6
Strainer
#100
Muffler
Capillary tube
ø3.0×ø2.0×200(×4)
Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFEFRENCE
Refrigerant piping: m Piping size O.D: mm
Max. Length A Max. Height difference B Gas Liquid
MUZ-SF25/35/42 20 12 9.52
6.35
MUZ-SF50 30 15 12.7
ADDITIONAL REFRIGERANT CHARGE (R410A: g)
Model
Outdoor unit
precharged
7 m 8 m 9 m 10 m 11 m 12 m 13 m 14 m 15 m 20 m
MUZ-SF25 700
0 30 60 90 120 150 180 210 240 390
MUZ-SF35 800
MUZ-SF42 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-SF50 1,550 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.
OBH629
13
The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions 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-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH
MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH
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( )
14.2
13.0
11.8
10.7
9.7
8.6
7.6
MUZ-SF50VE
MUZ-SF50VEH
MUZ-SF42VE
MUZ-SF42VEH
MUZ-SF35VE
MUZ-SF35VEH
MUZ-SF25VE
MUZ-SF25VEH
Indoor air Wet-bulb temperature
difference (°C)
7.6
7.0
6.4
5.9
5.3
4.8
4.3
11.3
10.4
9.5
8.6
7.8
7.0
6.2
16.0
14.6
13.3
12.0
10.8
9.6
8.5
8-1. CAPACITY AND INPUT CURVES
PERFORMANCE CURVES8
OBH629
14
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)
6.4
5.9
5.3
4.8
4.3
3.8
9.5
8.6
7.8
7.0
6.2
5.4
11.8
10.7
9.7
8.6
7.6
6.7
13.3
12.0
10.8
9.6
8.5
7.4
MUZ-SF50VE
MUZ-SF50VEH
MUZ-SF42VE
MUZ-SF42VEH
MUZ-SF35VE
MUZ-SF35VEH
MUZ-SF25VE
MUZ-SF25VEH
Total input (Cooling :
at Rated frequency
)
Indoor air Dry-bulb temperature
difference (°C)
20.3
18.8
17.2
15.6
14.1
12.5
10.9
9.4
7.8
6.3
32.1
29.6
27.2
24.7
22.2
19.8
17.3
14.8
12.3
9.9
31.6
29.2
26.7
24.3
21.9
19.4
17.0
14.6
12.2
9.7
MUZ-SF50VE
MUZ-SF50VEH
MUZ-SF42VE
MUZ-SF42VEH
MUZ-SF25VEH
MUZ-SF35VE
23.8
21.9
20.1
18.3
16.5
14.6
12.8
11.0
9.1
7.3
MUZ-SF35VEH
MUZ-SF25VE
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)
20.3
18.8
17.2
15.6
14.1
12.5
10.9
9.4
7.8
6.3
MUZ-SF50VE
MUZ-SF50VEH
MUZ-SF42VE
MUZ-SF42VEH
MUZ-SF35VEH
MUZ-SF25VE
23.8
21.9
20.1
18.3
16.5
14.6
12.8
11.0
9.1
7.3
MUZ-SF35VEH
MUZ-SF35VE
32.1
29.6
27.2
24.7
22.2
19.8
17.3
14.8
12.3
9.9
31.6
29.2
26.7
24.3
21.9
19.4
17.0
14.6
12.2
9.7
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
oerating range in heating
MUZ-SF25/35/42/50VE: -15°C
MUZ-SF25/35/42/50VEH: -20°C
OBH629
15
8-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR
0 50 100
0.0
0.5
1.0
1.5
0 50 100
0.0
0.5
1.0
1.5
0 50 100
0.0
0.5
1.0
1.5
0 50 100
0.0
0.5
1.0
1.5
2.0
0 50 100
150
0.0
0.5
1.0
1.5
050100
150
0.0
0.5
1.0
1.5
050100
150
0.0
0.5
1.0
1.5
050100
150
0.0
0.5
1.0
1.5
2.0
0 50 100
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
0.0
0.5
1.0
1.5
2.0
050100
150
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
0.0
0.5
1.0
1.5
0 50 100
150
0.0
0.5
1.0
1.5
2.0
MUZ-SF25VE MUZ-SF25VEH
MUZ-SF35VE MUZ-SF35VEH
Correction of Cooling capacity
Capacity correction factors
Correction of Cooling input
Input correction factors
Correction of Heating capacity
Capacity correction factors
MUZ-SF42VE MUZ-SF42VEH
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-SF50VE MUZ-SF50VEH
Correction of Heating input
Capacity correction factors
The o per ational fr equency
of compressor (Hz)
The o per ational fr equency
of compressor (Hz)
The o per ational fr equency
of compressor (Hz)
The o per ational fr equency
of compressor (Hz)
The o per ational fr equency
of compressor (Hz)
The operational frequency
of compressor (Hz)
The operational frequency
of compressor ( Hz)
The operational frequenc y
of compressor ( Hz)
Correction of Cooling capacity
The operational frequency
of compressor (Hz)
Capacity cor rection f actors
Correction of Cooling input
The operational frequenc y
of compressor (Hz )
Input corr ection factors
Correction of Heating capacity
The operational frequenc y
of compressor ( Hz)
Capacity c orr ection factor s
Correction of Heating input
The operational frequency
of compressor ( Hz)
Input corr ection factors
Corr ection of C ooling capacity
The o per ational fr equency
of compressor (Hz)
Capacity cor rection f actors
Corr ection of C ooling input
The operational frequency
of compressor (Hz)
Input correction factors
Correction of Heating capacity
The operational frequency
of compressor ( Hz)
Capacity c orr ection factor s
Correction of Heating input
The operational frequency
of compressor ( Hz)
Input corr ection factors
OBH629
16
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
0.8
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
6
4
7
8
(kgf/cm2[Gauge])(MPa [Gaug e])
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-SF25VE
MUZ-SF25VEH
MUZ-SF35VE
MUZ-SF35VEH
MUZ-SF42VE
MUZ-SF42VEH
MUZ-SF50VE
MUZ-SF50VEH
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/cm
2
[Gauge])
OBH629
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