Mitsubishi Electric MUZ-GA50VA, MUZ-GA71VA, MUZ-GA60VA Service Manual
SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
HFC
utilized
R410A
Wireless type
Models
MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA -
No. OB389
E1
E1
E1
CONTENTS
Indication of
model name
MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA -
NOTE:
This service manual describes technical data of the outdoor units.
•As for indoor units MSZ-GA50VA - , MSZ-GA60VA - and MSZ-GA71VA - , refer to
the service manual OB388.
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················5
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························7
E1
E1
E1
5. OUTLINES AND DIMENSIONS·························8
6. WIRING DIAGRAM ············································9
7. REFRIGERANT SYSTEM DIAGRAM··············11
8. PERFORMANCE CURVES······························13
9. ACTUA TOR CONTROL····································24
10. TROUBLESHOOTING······································25
11. DISASSEMBLY INSTRUCTIONS ·····················44
12. PARTS LIST······················································48
E1E1E1
1
Refrigeration
oil
Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-51.4
1.557
64
Non combustible
0
1730
From liquid phase in cylinder
Possible
Incompatible oil
Non
Non
Previous refrigerant
R22
R22 (100%)
Single refrigerant
Included
A1
86.5
-40.8
0.94
44.4
Non combustible
0.055
1700
Gas phase
Possible
Compatible oil
Light yellow
Non
Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (:)
Steam pressure [25:](Mpa)
Saturated steam density [25:](Kg/K)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1:Ozone Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter : based on CO
2
New Specification Current Specification
The incompatible refrigeration oil easily separates from
refrigerant and is in the upper layer inside the suction muffler.
Raising position of the oil back hole enables to back the
refrigeration oil of the upper layer to flow back to the
compressor.
Since refrigerant and refrigeration oil are compatible each,
refrigeration oil goes back to the compressor through the
lower position oil back hole.
Compressor
Suction muffler
Oil back hole
refrigeration oil
Refrigerant
Compressor
Suction muffler
Oil back hole
Refrigerating oil /Refrigerant
Compressor
TECHNICAL CHANGES
MUZ-A18YV - ➔ MUZ-GA50VA -
MUZ-A24YV - ➔ MUZ-GA60VA MUZ-A26YV - ➔ MUZ-GA71VA -
1.Indication of capacity has been changed.(BTU base ➔ kW base)
2.Outdoor electronic control P.C. board has been changed.
3.Noise filter P.C. board has been changed.
4.Length of fan motor lead wire been changed.
5.Shape of relay panel has been changed.
6.Signal of terminal block has been changed.
E1E1
E1E1
E1E1
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
• This room air conditioner adopts HFC refrigerant (R410A) which never destroys the ozone layer.
• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 air
conditioners.
1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/
materials are required. Refer to the table below.
2 Take sufficient care not to allow water and other contaminations to enter the R410Arefrigerant during storage and
installation, since it is more susceptible to contaminations than R22.
3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant
piping.)
4 Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.
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/
ff
[Gauge])
2
Conversion chart of refrigerant temperature and pressure
R410A tools Can R22 tools be used?
Gas leak detector
R410A has high pressures beyond the measurement range of existing
gauges. Port diameters have been changed to prevent any other refrigerant
from being charged into the unit.
Hose material and cap size have been changed to improve the pressure
resistance.
Dedicated for HFC refrigerant.
6.35 mm and 9.52 mm
Description
Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
Provided for flaring work (to be used with R22 flare tool).
Provided to prevent the back flow of oil. This adapter enables you to use
vacuum pumps.
It is difficult to measure R410A with a charging cylinder because the
refrigerant bubbles due to high pressure and high-speed vaporization
No
No
No
Yes
Yes
New
New
New
Gauge manifold
Charge hose
Torque wrench
Flare tool
Flare gauge
Vacuum pump
adapter
Electronic scale for
refrigerant charging
No : Not Substitutable for R410A Yes : Substitutable for R410A
No 12.7 mm and 15.88mm
Wall
thickness
Outside diameter
Pipe
mm
For liquid
For gas
6.35
9.52
12.7
15.88
0.8 mm
0.8 mm
0.8 mm
1.0 mm
Heat resisting foam plastic
Specific gravity 0.045 Thickness 8 mm
Insulation material
(MPa [Gauge])
4.0
3.5
3.0
2.5
2.0
1.5
R410A
R22
NOTE : The unit of pressure has been changed to MPa on the
international system of units(SI unit system).
1.0
0.5
Saturated liquid pressure
0.0
-0.5
-30 -20 -10 0 10 20
30
40 50 60
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
(:)
1.Tools dedicated for the air conditioner with R410A refrigerant
The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being
charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.
2.Refrigerant piping
1 Specifications
Use the refrigerant pipes that meet the following specifications.
• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88).
Never use any pipe with a thickness less than 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88), as the pressure resistance is
insufficient.
3
Electronic scale for refrigerant charging
Outdoor unit
Refrigerant gas
cylinder
operating valve
Refrigerant gas cylinder
for R410A with siphon
Refrigerant (liquid)
Service port
Gauge manifold
valve (for R410A)
Union
Liquid pipe
Gas pipe
Stop valve
Indoor unit
Charge hose (for R410A)
R410A
Pipe diameter
mm
6.35
9.52
12.7
15.88
17
22
26
29
Dimension of flare nut
R22
17
22
24
27
2 Flaring work and flare nut
Flaring work for R410A pipe differs from that for R22 pipe.
For details of flaring work, refer to Installation manual “FLARING WORK”.
3.Refrigerant oil
Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.
4.Air purge
• Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant
circuit.
• Use the vacuum pump for air purging for the purpose of environmental protection.
5.Additional charge
For additional charging, charge the refrigerant from liquid phase of the gas cylinder.
If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the
outdoor unit. In this case, ability of the refrigeration cycle decreases or normal operation can be impossible. However,
charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.
4
2
PART NAMES AND FUNCTIONS
MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA -
E1
E1
E1
OUTDOOR UNIT
Air inlet
(back and side)
Piping
Drain hose
Air outlet
Drain outlet
3
Electrical
Coefficient of performance(C.O.P) ✽1
Fan
Special
NOTE : Test conditions are based on ISO 5151.
SPECIFICATION
Outdoor model
Function
Power supply
Capacity Rated frequency(Min.-Max.)
Dehumidification
Air flow(High/LowW)
Capacity
Power outlet
Running current
Power input
Power factor
Starting current ✽1
data
Compressor motor current ✽1
Fan motor current
Model
Output
Winding
resistance(at 20:)
Compressor
Model
Winding
motor
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level(High/LowW)
Fan speed(High/LowW)
Fan speed regulator
Refrigerant filling
capacity(R410A)
Refrigeration oil(Model)
remarks
Thermistor RT62(at 100:)
Thermistor RT61(at 25:)
Thermistor RT64(at 50:)
Thermistor RT65(at 25:)
Thermistor RT68(at 25:)
r/h
K /h
mm
rpm
Cooling : Indoor DB 27: WB 19:
Outdoor DB 35: WB (24:)
Heating : Indoor DB 20: WB 15:
Outdoor DB 7: WB 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
w Reference value
5.0(0.9-5.9)
kW
2,940/1,650
A
A
W
%
A
A
A
W
"
"
WHT-RED 15.2 RED-BLK15.2
kg
dB
800/480
kg
cc
k"
k"
k"
k"
k"
MUZ-GA50VA -
Cooling
Single phase
230V,50Hz
2.5
6.23
1,410
98.4
5.93
3.42
SNB130FLDH
U-V 0.45 W-U 0.45
RC0J60-AA
BLK-WHT 15.2
840o850o330
W
53/51
450 (NEO22)
5.9(0.9-7.8)
W
2,940/2,210
20
7.46
0.30
850
V-W 0.45
53
W
2
1.8
13.4
10.0
17.0
10.0
10.0
Heating
—
7.01
1,580
98.0
6.71
3.62
55/53
800/620
5
ACCESSORIES
Drain socket
1
Drain cap [33
2
E1
W
W
MUZ-GA60VA -
Cooling
Single phase
230V,50Hz
6.0(0.9-6.7)
3.0
W
2,940/1,650
8.23
1,870
98.8
7.93
3.11
SNB130FLDH
U-V 0.45 W-U 0.45
V-W 0.45
RC0J60-AA
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK15.2
840o850o330
W
53/51
800/480
W
450 (NEO22)
6.8(0.9-8.1)
W
2,940/2,210
20
8.93
0.30
850
53
800/620
2
1.8
13.4
10.0
17.0
10.0
10.0
E1
Heating
—
8.33
1,880
98.1
8.03
3.51
55/53
MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA -
W
W
MUZ-GA71VA -
Cooling
Single phase
230V,50Hz
7.1(0.9-8.3)
3.8
W
2,940/1,650
2,360
U-V 1.41 W-U 1.41
WHT-RED 15.2 RED-BLK15.2
53/51
800/480
W
2,940/2,210
20
10.4
98.7
11.2
10.1
0.30
2.93
TNB220FMCH
1,300
V-W 1.41
RC0J60-AA
BLK-WHT 15.2
840o850o330
58
W
W
2
2.0
870 (NEO22)
13.4
10.0
17.0
10.0
10.0
1
2
E1
Heating
8.1(0.9-9.6)
—
10.6
2,390
98.0
10.3
3.31
W
55/53
800/620
E1
E1
E1
W
W
OUTDOOR UNIT
Model
Item
Smoothing capacitor
Current transformer
Current transformer
Fuse
Fuse
Fuse
Intelligent power module
High pressure switch
Intelligent power module
Reactor
Expansion valve coil
Power factor controller
Resistor
Resistor
Resistor
Solenoid coil relay
Terminal block
Terminal block
Relay
R.V. coil
MUZ-GA50VA
-
E1
(CB1,2,3)
(CT1,2)
(CT61)
(F64)
(F801)
(F911)
(HC930)
(HPS)
(IPM)
(L)
(LEV)
(PFC)
(R64A,B)
(R937A,B)
(RS1~4)
(SSR61)
(TB1)
(TB2)
(X64)
(21S4)
MUZ-GA60VA
-
E1
MUZ-GA71VA
-
E1
560+ 450V
ETQ19Z68AY
ETQ19Z53AY
250V 2A
250V 3.15A
250V 1A
PS21661-RZ
PS21244-A
340µH 20A
CAM-MD12ME
PS51259-A
10" 10W
1.1" 2W 2%
0.04" 7W
TLP3506
3P
3P
G4A
LD30013
ACB-DB156
–
Specifications and rating conditions of main electric parts
6
4
COOLING
FUNCTION
SPL(dB(A)) LINE
High
FAN SPEED
HEATING
53
55
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
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
NOISE CRITERIA CURVES
MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA -
E1
E1
E1
OUTDOOR UNIT
1m
MICROPHONE
7
5
OUTLINES AND DIMENSIONS
MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA -
OUTDOOR UNIT
515
299
66
51
34
330
850
430
E1
E1
E1
121
500
840
Unit: mm
REQUIRED SPACE
Open as a rule
500mm or more if
the front and both
198
sides are open
100mm or more
200mm or more if
there are obstacles
to both sides
350mm or more
Service panel
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [6.35 (MUZ-GA50/GA60VA)
[9.52 (MUZ-GA71VA)
30-
35-
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [12.7 (MUZ-GA50VA)
[15.88 (MUZ-GA60/GA71VA)
40
100mm or more
360
Open as a rule
80
500mm or more if the back,
both sides and top are open
155
90
8
6
WIRING DIAGRAM
MUZ-GA50VA MUZ-GA60VA -
OUTDOOR UNIT
RED
W
CT2
PFC
S
R
E1
E1
CB3
CB2
CB1
MODELS WIRING DIAGRAM
V
V
MC
IPM
CN5
U
WHT
CT1
2 1
BLK
21
U
RS3
RS1
27
RS4
RS2
CN2
CN3
CN4
6 5 4 3 1
RT64
POWER
BOARD
LD9
LD1LD2
1 2
GRN
WHT
RED
BLK
BLK
GRY
1 3
1 2
ORN
PNK
CN801
CN701
MF
YLW
BLU
CN931
F801
RED
R937A
T801
WHT
2 31 3 4 51 2
BLK
CN932
HC930
R937B
diagram for servicing.
refer to the indoor unit electric wiring
1.About the indoor side electric wiringNOTES:
NAME
:Terminal block :Connector
3.Symbols below indicate.
2.Use copper conductors only (for field wiring).
W
RED
1
L
2
RED
3X64
R64B
R64A
F64
NF
TAB1
BRN
TB1
L
CIRCUIT
BREAKER
POWER SUPPLY
~/N 230V 50Hz
YLW
4
3
YLW
TAB4
BLU
BLK
BLK
NR64
N
2 1
CT61
TAB2
PE
BLK
CN903
SSR61
F911
2 1
51 2 3
CN902
CN901
1 2
LDE2
LDE1
13
CN61
GRN/YLW
NOISE
FILTER
BLU
BLU
CN912
GRN
GRN
P.C.BOARD
TO INDOOR
BLK
BLK
BLK
BLK
1 5 6 7
5321
BLK
BLK
BLK
BLK
21S4
ELECTRONIC
1
WHT
BLU
WHT
TB2
230V~
UNIT
CONNECTING
CN702
CN661
CN781
CN663
CONTROL
P.C.BOARD
CN601
3
BLU
S1
S2
12-24V
CN79541 2 3 7 8
21
5
RED
S3
6
LEV
TERMINAL BLOCK
TERMINAL BLOCK
TRANSFORMER
SOLENOID COIL RELAY
AMBIENT TEMPERATURE THERMISTOR
FIN TEMPERATURE THERMISTOR
OUTDOOR HEAT EXCHANGER
TEMPERATURE THERMISTOR
T801
RT68
RT65
RT64
SYMBOL
SSR61
TB1
TB2
RELAY
X64
R.V. COIL
21S4
RT61 RT62 RT68
NAME
RT65
COMPRESSOR
VARISTOR
OUTDOOR FAN MOTOR
NOISE FILTER
POWER FACTOR CONTROLLER
NF
MF
MC
SYMBOL
NAME
PFC
NR64
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMISTOR
RESISTOR
RESISTOR
RESISTOR
RT62
RT61
RS1~4
R64A,B
R937A, B
CURRENT TRANSFORMER
SMOOTHING CAPACITOR
FUSE (T2AL 250V)
CURRENT TRANSFORMER
CT1, 2
CB1~3
SYMBOL
FUSE (T1AL 250V)
FUSE (T3.15AL 250V)
INTELLIGENT POWER MODULE
INTELLIGENT POWER MODULE
F64
CT61
F911
F801
IPM
HC930
EXPANSION VALVE COIL
REACTOR
L
LEV
9
MUZ-GA71VA -
OUTDOOR UNIT
E1
MODEL WIRING DIAGRAM
RED
W
CT2
CB3
CB2
CB1
PFC
S
R
RED
1
L
2
RED
X64 3
R64A R64B
F64
NF
TAB1
BRN
TB1
L
CIRCUIT
BREAKER
POWER SUPPLY
~/N 230V 50Hz
W
YLW
4
3
YLW
TAB4
BLU
MC
V
V
IPM
BLK
NR64
N
CN5
2 1
BLK
12
CT61
TAB2
PE
U
BLK
WHT
U
CT1
RS1 RS3
27
BLK
12
CN903
SSR61
F911
21
CN3
RS4
RS2
CN2
51 2 3
CN902
CN901
1 2
LDE2
LDE1
13
CN61
GRN/YLW
NOISE
FILTER
RT64
POWER
BOARD
LD9
LD1LD2
1 2
CN4
6 5 4 3 1
BLU
BLU
CN912
GRN
GRN
P.C.BOARD
TO INDOOR
GRY
GRN
WHT
RED
1 3
BLK
1 2
BLK
BLK
BLK
BLK
BLK
1 5 6 7
5321
BLK
BLK
BLK
BLK
21S4
ELECTRONIC
1
WHT
BLU
WHT
TB2
230V~
UNIT
CONNECTING
MF
BLU
ORN
PNK
CN931
CN801
F801
CN701
CN702
CN661
CN781
CN663
CONTROL
P.C.BOARD
CN681
CN601
3
BLU
S1
S2
12-24V
YLW
CN79541 2 3 7 8
21
1 2
5
RED
RED
T801
S3
BLK
WHT
2 31 3 4 51 2
HC930
R937A
6
RED
CN932
LEV
RED
HPS
R937B
RT61RT62 RT68
RT65
diagram for servicing.
refer to the indoor unit electric wiring
1.About the indoor side electric wiringNOTES:
NAME
AMBIENT TEMPERATURE THERMISTOR
RT65
SYMBOL
NAME
COMPRESSOR
MC
SYMBOL
NAME
:Terminal block :Connector
3.Symbols below indicate.
2.Use copper conductors only (for field wiring).
TERMINAL BLOCK
TERMINAL BLOCK
TRANSFORMER
SOLENOID COIL RELAY
OUTDOOR HEAT EXCHANGER
TEMPERATURE THERMISTOR
T801
RT68
SSR61
OUTDOOR FAN MOTOR
POWER FACTOR CONTROLLER
NOISE FILTER
VARISTOR
NF
MF
PFC
NR64
R.V. COIL
RELAY
X64
TB1
TB2
21S4
DISCHARGE TEMPERATURE THERMISTOR
RESISTOR
R64A,B RESISTOR
R937A, B
FIN TEMPERATURE THERMISTOR
RESISTOR
DEFROST THERMISTOR
RT62
RT61
RT64
RS1~4
10
SMOOTHING CAPACITORCB1~3
CURRENT TRANSFORMER
CURRENT TRANSFORMER
CT1, 2
SYMBOL
FUSE (T1AL 250V)
HIGH PRESSURE SWITCH
FUSE (T3.15AL 250V)
FUSE (T2AL 250V)
INTELLIGEMT POWER MODULE
F64
CT61
F911
F801
HPS
HC930
EXPANSION VALVE COIL
REACTOR
INTELLIGEMT POWER MODULE
L
IPM
LEV
7
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
[3.6✕[2.4✕50
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe [12.7 (MUZ-GA50VA)
(with heat insulator) [15.88 (MUZ-GA60VA)
Refrigerant pipe [6.35
(with heat insulator)
LEV
R.V. coil
heating ON
cooling OFF
Muffler
#100
Strainer
#100
Receiver
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
[3.6✕[2.4✕50
Capillary tube
[1.8✕[0.6✕1000
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe [15.88
(with heat insulator)
Refrigerant pipe [9.52
(with heat insulator)
LEV
R.V. coil
heating ON
cooling OFF
Oil separator
High-pressure
switch
Strainer
#100
Receiver
Outdoor
heat
exchanger
temperature
thermistor
RT68
Strainer
#100
Strainer
#100
Ambient
temperature
thermistor
RT65
REFRIGERANT SYSTEM DIAGRAM
MUZ-GA50VA MUZ-GA60VA -
OUTDOOR UNIT
E1
E1
Unit:mm
MUZ-GA71VA -
E1
OUTDOOR UNIT
11
Unit:mm
Refrigerant Piping
Max. length
A
w Height difference should be within 15m regardless of which unit, indoor or outdoor position is high.
w Max. Height
difference 15m
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH
Model
Piping size O.D : mm Length of connecting pipe : m
Refrigerant piping
Max. length : m
A
30
Indoor unit
Gas 0.43
Liquid 0.5
Gas
12.7
15.88
Liquid
6.35
9.52
MUZ-GA50VA - E1
MUZ-GA60VA - E1
MUZ-GA71VA - E1
Outdoor unit
Gas 0
Liquid 0
Model
MUZ-GA50VA -
E1
Refrigerant piping length (one way)
Outdoor unit
precharged
1,800
15m
160
20m
260
25m
360
30m
460
7m
0
10m
60
Model
MUZ-GA60VA -
E1
Refrigerant piping length (one way)
15m
160
20m
260
25m
360
7m
0
10m
60
Outdoor unit
precharged
1,800
30m
460
Outdoor unit
precharged
2,000
0 165 440 715 990 1,265
Refrigerant piping length (one way)
15m10m7m
Model
MUZ-GA71VA -
E1
20m
25m 30m
MAX. HEIGHT DIFFERENCE
ADDITIONAL REFRIGERANT CHARGE(R410A : g)
Calculation : Xg=20g/m ✕ (Refrigerant piping length (m)–7)
Calculation : Xg=20g/m ✕ (Refrigerant piping length (m)–7)
Calculation : Xg=55g/mo(Refrigerant piping length(m)-7)
12
PERFORMANCE CURVES8
MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA -
E1
E1
E1
The standard data contained in these 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
207 ~ 253V, 50Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature : °C WB
(2) Indoor outlet air wet-bulb temperature : °C WB
(3) Outdoor intake air dry-bulb temperature : °C DB
(4) Total input : W
}
Cooling
(5) Indoor intake air dry-bulb temperature : °C DB
(6) Outdoor intake air wet-bulb temperature : °C WB
(7) Total input : W
}
Heating
Indoor air wet/dry-bulb temperature difference on the left side of the chart on this page and next page shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your
reference at service.
How to measure the indoor air wet-bulb / 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.
INDOOR UNIT
8.7
8.0
7.3
6.6
5.9
difference (degree)
5.3
Indoor air Wet-bulb temperature
Wet and dry-bulb
thermometers
8.7
10.7
8.0
7.3
6.6
5.9
5.3
9.8
8.9
8.0
7.2
6.4
Indoor intake air W
et-bulb temperature (
:)
Outdoor intake air Dry-bulb temperature (:)
OUTDOOR UNIT
Wet and dry-bulb
thermometers
Indoor intake air Wet-bulb temperature (:)
Outdoor intake air Dry-bulb temperature (:)
Rated frequency 71Hz
MSZ-GA50VA - E1
MUZ-GA50VA - E1
Rated frequency 87Hz
MSZ-GA60VA - E1
MUZ-GA60VA - E1
MSZ-GA71VA - E1
MUZ-GA71VA - E1
Rated frequency 62Hz
13
MUZ-GA71VA -
E1
MUZ-GA71VA -
E1
MUZ-GA71VA -
E1
MUZ-GA71VA -
E1
Capacity correction factors
Input correction factors
Input correction factors
Capacity correction factors
Correction of Cooling capacity
The operational frequency of compressor
Correction of Cooling total input
The operational frequency of compressor
Correction of Heating total input
The operational frequency of compressor
Correction of Heating capacity
The operational frequency of compressor
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
(Hz)
24.1
22.3
20.4
18.5
16.7
14.8
13.0
11.1
23.4
21.6
19.8
18.0
16.2
14.4
12.6
10.8
Indoor air Dry-bulb temperature
difference (degree)
Indoor intake air Dry-bulb temperature (
:)
Outdoor intake air Wet-bulb temperature (:)
Outdoor intake air Wet-bulb temperature (:)
Indoor intake air Dry-bulb temperature (:)
MSZ-GA50VA - E1
MUZ-GA50VA - E1
Rated frequency 81Hz
MSZ-GA60VA - E1
MUZ-GA60VA - E1
Rated frequency 96Hz
MSZ-GA71VA - E1
MUZ-GA71VA - E1
Rated frequency 66Hz
27.9
25.7
23.6
21.4
19.3
17.2
15.0
12.9
NOTE:The above curves are for the heating operation without any frost.
Capacity correction factors
Input correction factors
Input correction factors
Capacity correction factors
Correction of Cooling capacity
The operational frequency of compressor
Correction of Cooling total input
The operational frequency of compressor
Correction of Heating total input
The operational frequency of compressor
Correction of Heating capacity
The operational frequency of compressor
Capacity correction factors
Input correction factors
Input correction factors
Capacity correction factors
Correction of Cooling capacity
The operational frequency of compressor
Correction of Cooling total input
The operational frequency of compressor
Correction of Heating total input
The operational frequency of compressor
Correction of Heating capacity
The operational frequency of compressor
MUZ-GA50VA -
E1E1
MUZ-GA50VA -
E1E1
MUZ-GA50VA -
E1E1
MUZ-GA50VA -
E1E1
MUZ-GA60VA -
E1E1
MUZ-GA60VA -
E1E1
MUZ-GA60VA -
E1E1
MUZ-GA60VA -
E1E1
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
(Hz)
0 50 100 150
0.5
1.0
1.5
14
OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
(MPa [Gauge])
(kgf/F [Gauge])
18 32
15 2050256030
70 (%)
35(˚C)
0.3
0.4
0.5
0.6
0.7
0.8
71Hz
3
4
5
6
7
8
9
0.9
Ambient temperature(˚C) Ambient humidity(%)
Outdoor low pressure
15 2050256030
70 (%)
35(˚C)
4
5
6
7
8
71Hz
32
18
Outdoor unit current(A)
Ambient temperature(˚C) Ambient humidity(%)
MUZ-GA50VA -
E1E1
MUZ-GA50VA -
E1E1
0.3
0.4
0.5
0.6
0.7
0.8
3
4
5
6
7
8
9
0.9
MUZ-GA71VA -
E1
15 205025
60
30
70 (%)
35(˚C)
5
7
9
11
13
62Hz
32
18
Outdoor unit current(A)
Ambient temperature(˚C) Ambient humidity(%)
MUZ-GA71VA -
E1
(MPa [Gauge])
(kgf/F [Gauge])
18 32
15 2050256030
70 (%)
35(˚C)
62Hz
Ambient temperature(˚C) Ambient humidity(%)
Outdoor low pressure
0.3
0.4
0.5
0.6
0.7
0.8
3
4
5
6
7
8
9
0.9
(MPa [Gauge])
(kgf/F [Gauge])
18 32
15 2050256030
70 (%)
35(˚C)
87Hz
15 205025
60
30
70 (%)
35(˚C)
5
6
7
8
9
87Hz
32
18
Ambient temperature(˚C) Ambient humidity(%)
Outdoor low pressure
Outdoor unit current(A)
Ambient temperature(˚C) Ambient humidity(%)
MUZ-GA60VA -
E1E1
MUZ-GA60VA -
E1E1
<How to operate fixed-frequency operation (Test run operation)>
1. Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL : Press once, HEAT: Press twice).
2. Test run operation starts and continues to operate for 30 minutes.
3. Compressor starts at fixed-frequency.
4. Indoor fan operates at High speed.
5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts.
6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCYOPERATION 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/ff[Gauge])
OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
COOL operation
1 Both indoor and outdoor unit are under the
same temperature/humidity condition.
2 Air flow : High speed
3 Operational frequency : 71Hz(MUZ-GA50VA)
87Hz(MUZ-GA60VA)
62Hz(MUZ-GA71VA)
Dry-bulb temperature
20
25
30 70
Relative humidity(%)
50
60
15
HEAT operation
Outdoor unit current (A)
Outdoor unit current (A)
Ambient temperature(˚C)
Ambient temperature(˚C)
Outdoor unit current (A)
Ambient temperature(˚C)
MUZ-GA71VA -
E1
MUZ-GA50VA -
E1E1
MUZ-GA60VA -
E1E1
10.0
9.0
8.0
7.0
6.0
5.0
4.0
2 5 10 15 20 25(:)
58Hz
58Hz
16.0
15.0
14.0
13.0
12.0
11.0
10.0
2 5 10 15 20 25(:)
12.0
11.0
10.0
9.0
8.0
7.0
6.0
2 5 10 15 20 25(:)
58Hz
Condition indoor: Dry bulb temperature 20.0°C
Wet bulb temperature 14.5°C
Condition outdoor: Dry bulb temperature 2,7,15,20.0°C
Wet bulb temperature 1,6,12,14.5°C
Operational frequency : 58Hz
16
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