Mitsubishi OB389F Service Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
HFC
utilized
R410A
OUTDOOR UNIT
SERVICE MANUAL
Wireless type
Models
Revision F:
• MUZ-GA60VA- has been added.
Please void OB389 REVISED EDITION-E.
E3
No. OB389
REVISED EDITION-F
MUZ-GA50VA MUZ-GA60VA MUZ-GA60VA MUZ-GA60VA MUZ-GA71VA MUZ-GA71VA -
E1
E1
E2
E3
E1
E2
Indoor unit service manual
MSZ-GA•VA Series (OB388)
CONTENTS
1. TECHNICAL CHANGES ····································3
2. PART NAMES AND FUNCTIONS······················6
3. SPECIFICATION·················································6
4. NOISE CRITERIA CURVES·······························7
5. OUTLINES AND DIMENSIONS·························8
6. WIRING DIAGRAM ············································9
7. REFRIGERANT SYSTEM DIAGRAM··············12
8. PERFORMANCE CURVES······························15
9. ACTUA TOR CONTROL····································26
10. SERVICE FUNCTIONS·····································27
11. TROUBLESHOOTING ······································27
12. DISASSEMBLY INSTRUCTIONS·····················46
13. PARTS LIST······················································50
14. RoHS PARTS LIST···········································54
NOTE:
• RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
• Contents of SERVICE FUNCTIONS(10) have been removed.
Revision A :
• RoHS PARTS LIST has been added.
• Failure mode recall function(11-2.) has been changed.
• Check of HPS(11-6.H) has been corrected.
Revision B:
• Compressor has been changed. (MUZ-GA50/60VA)
PARTS LIST number
E02 851 900
E02 939 900
RoHS PARTS LIST number
E12 851 900
E12 939 900
Previous
New
Model
SNB130FLDH
SNB130FLDH1
Revision C:
• MUZ-GA60/71VA- have been added.
• Check of outdoor thermistors(11-6.F) has been corrected.
• Contents of SERVICE FUNCTIONS(10) have been removed as these models do not have the functions.
E2
Revision D:
• PARTS LIST and RoHS PARTS LIST have been changed.
Revision E:
• REFRIGERANT SYSTEM DIAGRAM has been changed for MUZ-GA60VA- .
E2
Revision F:
• MUZ-GA60VA- has been added.
E3
2
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 Depletion Potential : based on CFC-11
w2 :Grobal Warming Potential : based on CO
2
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 has been changed.
5.Shape of relay panel has been changed.
6.Signal of terminal block has been changed.
MUZ-GA60VA - ➔ MUZ-GA60VA -
1.Compressor has been changed. (SNB130FLDH1 ➔ SNB130FLEH1)
2.Outdoor electronic control P.C. board has been changed.
MUZ-GA60VA - ➔ MUZ-GA60VA -
1.Compressor has been changed. (SNB130FLEH1 ➔ SNB130FGBH)
2.Outdoor electronic control P.C. board has been changed.
3.Refrigerant circuit has been changed.
MUZ-GA71VA - ➔ MUZ-GA71VA -
1.Outdoor electronic control P.C. board has been changed.
E1E1
E1E1
E1E1
E2E1
E3E2
E2E1
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.
3
-30 -20 -10 0 10 20
30
40 50 60
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
(MPa [Gauge])
R410A
R22
Conversion chart of refrigerant temperature and pressure
Saturated liquid 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
NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).
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,
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
Refrigeration oil /Refrigerant
Compressor
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
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/
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.
4
ff
[Gauge])
2.Refrigerant piping
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
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.
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”.
Pipe diameter
mm
6.35
9.52
12.7
15.88
Dimension of flare nut
R410A
17
22
26
29
R22
17
22
24
27
3.Refrigeration 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, capacity 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.
Union
Stop valve
Indoor unit
Refrigerant gas
cylinder
operating valve
Liquid pipe
Gas pipe
Service port
Outdoor unit
Gauge manifold
valve (for R410A)
Charge hose (for R410A)
Refrigerant gas cylinder
for R410A with siphon
Refrigerant (liquid)
Electronic scale for refrigerant charging
5
2
Air inlet
Piping
Air outlet
(back and side)
Drain hose
Drain outlet
PART NAMES AND FUNCTIONS
MUZ-GA50VA
MUZ-GA60VA
MUZ-GA71VA
ACCESSORIES
3
Capacity
Electrical
Coefficient of performance(C.O.P) ✽1
Compressor
Fan
Special
SPECIFICATION
Outdoor model
Function
Power supply
Capacity Rated frequency(Min.-Max.)
Dehumidification
Air flow(High/Low)
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:)
Model
Winding
motor
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level(High/Low)
Fan speed(High/Low)
Fan speed regulator
Refrigerant filling
remarks
capacity(R410A)
Refrigeration oil(Model)
K /h
kW
r/h
A
A
W
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
Cooling
5.0(0.9-5.9)
2,940/1,650
SNB130FLDH or SNB130FLDH1
WHT-RED 15.2 RED-BLK15.2
800/480
NOTE : Test conditions are based on ISO 5151.
Cooling : Indoor DB 27: WB 19:
Heating : Indoor DB 20: WB 15:
Outdoor DB 35: WB (24:)
Outdoor DB 7: WB 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
MUZ-GA50VA
Heating
Single phase
230V,50Hz
5.9(0.9-7.8)
2.5
6.23
1,410
98.4
7.46
5.93
0.30
3.42
850
U-V 0.45 W-U 0.45
V-W 0.45
RC0J60-AA
BLK-WHT 15.2
840o850o330
53/51
NEO22
2,940/2,210
20
1,580
53
55/53
800/620
2
1.8
—
7.01
98.0
6.71
3.62
Drain socket
1
Drain cap [33
2
MUZ-GA60VA
Cooling
Single phase
230V,50Hz
6.0(0.9-6.7)
3.0
2,940/1,650
8.23
1,870
98.8
7.93
3.11
E1
SNB130FLDH or SNB130FLDH1
E2
SNB130FLEH1
E3
SNB130FGBH
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
53/51
800/480
Heating
6.8(0.9-8.1)
2,940/2,210
20
8.93
0.30
850
53
800/620
2
1.8
NEO22
—
8.33
1,880
98.1
8.03
3.51
55/53
1
2
MUZ-GA71VA
20
11.2
0.30
1,300
58
2
2.0
NEO22
Heating
8.1(0.9-9.6)
—
2,940/2,210
10.6
2,390
98.0
10.3
3.31
55/53
800/620
Cooling
Single phase
230V,50Hz
7.1(0.9-8.3)
3.8
2,940/1,650
10.4
2,360
98.7
10.1
2.93
TNB220FMCH
U-V 1.41 W-U 1.41
V-W 1.41
RC0J60-AA
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK15.2
840o850o330
53/51
800/480
6
OUTDOOR UNIT
MICROPHONE
1m
COOLING
FUNCTION
SPL(dB(A)) LINE
High
FAN SPEED
HEATING
53
55
Test conditions
Cooling : Dry-bulb temperature 35:
Wet-bulb temperature (24:)
Heating : Dry-bulb temperature 7:
Wet-bulb temperature 6:
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
(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 MUZ-GA71VA
560+ 450V
ETQ19Z68AY
ETQ19Z53AY
250V 2A
250V 3.15A
250V 1A
PS21661-RZ
ACB-DB156(for )
PS21244-A
340µH 20A
DC 12 V
PS51259-A
10" 10W
1.1" 2W 2%
0.04" 7W
TLP3506
3P
3P
G4A
AC 220 ~ 240 V
ACB-DB156
–
E3
Specifications and rating conditions of main electric parts
4
NOISE CRITERIA CURVES
MUZ-GA50VA
MUZ-GA60VA
MUZ-GA71VA
90
80
70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
7
5
30-
35-
155
90
198
40
515
299
66
34
51
330
360
850
430
500
80
121
840
Open as a rule
500 mm or more if
the front and both
sides are open
100 mm or more
200 mm or more if
there are obstacles
to both sides
Open as a rule
500 mm or more if the back,
both sides and top are open
350 mm or more
100 mm or more
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [12.7 (MUZ-GA50)
[15.88 (MUZ-GA60/71)
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [6.35 (MUZ-GA50/60)
[9.52 (MUZ-GA71)
REQUIRED SPACE
OUTLINES AND DIMENSIONS
MUZ-GA50VA
MUZ-GA60VA
MUZ-GA71VA
Unit: mm
8
6
WIRING DIAGRAM
MUZ-GA50VA
MUZ-GA60VA MUZ-GA60VA -
E1
E2
RED
W
CT2
CB3
CB2
CB1
PFC
S
R
RED
1
L
2
RED
3X64
R64B
R64A
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
21
BLK
CT61
TAB2
PE
U
BLK
WHT
U
CT1
RS3
RS1
27
BLK
21
CN903
SSR61
F911
GRN/YLW
RS4
RS2
21
CN902
21
CN3
CN2
5123
CN901
12
CN912
LDE2
LDE1
13
CN61
NOISE
FILTER
CN4
6543 1
RT64
GRN
POWER
BOARD
LD9
LD1LD2
BLK
12
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLU
BLU
21S4
GRN
GRN
BLU
WHT
P.C.BOARD
TO INDOOR
UNIT
ORN
PNK
GRY
WHT
CN801
RED
13
12
CN701
CN702
1567
5321
CN781
ELECTRONIC
CONTROL
P.C.BOARD
CN601
1
3
BLU
WHT
TB2
S1
230V~
CONNECTING
MF
YLW
BLU
CN931
F801
CN661
CN663
RED
S2
12-24V
CN7954123 78
21
5
RED
T801
S3
BLK
WHT
23134512
HC930
R937A
6
CN932
R937B
LEV
RT61 RT62 RT68
RT65
diagram for servicing.
refer to the indoor unit electric wiring
1.About the indoor side electric wiringNOTES:
NAME
FIN TEMPERATURE THERMISTOR
RT64
SYMBOL
NAME
COMPRESSOR
MC
SYMBOL
NAME
:Terminal block :Connector
3.Symbols below indicate.
2.Use copper conductors only (for field wiring).
TRANSFORMER
TERMINAL BLOCK
TERMINAL BLOCK
SOLENOID COIL RELAY
AMBIENT TEMPERATURE THERMISTOR
OUTDOOR HEAT EXCHANGER
TEMPERATURE THERMISTOR
T801
RT68
RT65
SSR61
OUTDOOR FAN MOTOR
VARISTOR
NOISE FILTER
RESISTOR
POWER FACTOR CONTROLLER
NF
MF
PFC
NR64
R64A,B
R.V. COIL
RELAY
X64
TB1
TB2
21S4
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMISTOR
RESISTOR
RESISTOR
RT62
RT61
RS1~4
R937A, B
CURRENT TRANSFORMER
FUSE (T2AL 250V)
CURRENT TRANSFORMER
SMOOTHING CAPACITOR
CT1, 2
CB1~3
SYMBOL
FUSE (T1AL 250V)
INTELLIGENT POWER MODULE
INTELLIGENT POWER MODULE
FUSE (T3.15AL 250V)
F64
CT61
F911
F801
IPM
HC930
EXPANSION VALVE COIL
REACTOR
L
LEV
9
MUZ-GA60VA -
E3
10
MUZ-GA71VA
BLK
CN902
12
CN903
12
TAB4
X64 3
R64A R64B
RED
2
3
1
4
L
YLW
YLW
RED
230V~
12-24V
CN912
CN663
WHT
BLU
NOISE
FILTER
P.C.BOARD
BRN
TO INDOOR
UNIT
CONNECTING
RED
S3
RT65
21
CN61
13
GRN/YLW
5
PFC
GRN
LD9
POWER
BOARD
RT64
21
CN3
HPS
RED
RED
RED
WHT
RS2
RS1 RS3
RS4
F801
CN901
NR64
CN681
ELECTRONIC
CONTROL
P.C.BOARD
CB1
CB2
CB3
HC930
IPM
NF
BLK
BLK
BLK
BLK
WHT
RED
YLW
BLU
ORN
PNK
GRY
BLU
WHT
GRN
GRN
BLU
BLU
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
RED
BLU
CT2
CT1
SSR61
U
6
CN7954123 78
CN661
12
W
CN4
TB2
S1
1
CN601
3
S2
1567
CN702
5321
CN781
13
CN701
12
12
CN931
LD1LD2
T801
R937A
R937B
CN801
23134512
MF
CN932
5123
LDE2
12
CT61
TAB1
F64
F911
LDE1
21S4
POWER SUPPLY
~/N 230V 50Hz
TAB2
N
PE
L
TB1
CIRCUIT
BREAKER
S
R
21
CN5
6543 1
CN2
27
V
MC
W
U
V
WHT
RT61RT62 RT68
LEV
:Terminal block :Connector
3.Symbols below indicate.
2.Use copper conductors only (for field wiring).
diagram for servicing.
refer to the indoor unit electric wiring
1.About the indoor side electric wiringNOTES:
SYMBOL
NAME
SYMBOL
NAME
CURRENT TRANSFORMER
FUSE (T1AL 250V)
LEV
EXPANSION VALVE COIL
L
REACTOR
IPM
INTELLIGENT POWER MODULE
HPS
HIGH PRESSURE SWITCH
CT61
CT1, 2
CURRENT TRANSFORMER
HC930
INTELLIGENT POWER MODULE
F911
F801
FUSE (T3.15AL 250V)
F64
FUSE (T2AL 250V)
SMOOTHING CAPACITORCB1~3
OUTDOOR FAN MOTOR
POWER FACTOR CONTROLLER
NOISE FILTER
RT61
DISCHARGE TEMPERATURE THERMISTOR
RS1~4
RESISTOR
R937A, B
RESISTOR
MF
MC
COMPRESSOR
R64A,B RESISTOR
PFC
NF
NR64
VARISTOR
FIN TEMPERATURE THERMISTOR
SOLENOID COIL RELAY
21S4
R.V. COIL
X64
RELAY
TB1
TERMINAL BLOCK
TB2
TERMINAL BLOCK
RT64
T801
TRANSFORMER
SSR61
AMBIENT TEMPERATURE THERMISTOR
RT65
RT68
OUTDOOR HEAT EXCHANGER
TEMPERATURE THERMISTOR
DEFROST THERMISTOR
RT62
NAME
SYMBOL
11
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 [6.35
(with heat insulator)
LEV
R.V. coil
heating ON
cooling OFF
Oil separator
Strainer
#100
Receiver
Outdoor
heat
exchanger
temperature
thermistor
RT68
Strainer
#100
Strainer
#100
Ambient
temperature
thermistor
RT65
Refrigerant pipe [15.88
(with heat insulator)
REFRIGERANT SYSTEM DIAGRAM
MUZ-GA50VA
MUZ-GA60VA -
Unit:mm
E1
MUZ-GA60VA -
E2
12
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
[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
MUZ-GA60VA -
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 [15.88
(with heat insulator)
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
High-pressure
switch
E3
Unit:mm
MUZ-GA71VA
Unit:mm
13
Refrigerant Piping
Max. length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Model
Piping size O.D : mm
Refrigerant piping : m
Max. length
A
Max. Height
difference
B
1530
Gas
12.7
15.88
Liquid
6.35
9.52
MUZ-GA50VA
MUZ-GA60VA
MUZ-GA71VA
Model
MUZ-GA50VA
MUZ-GA60VA
Refrigerant piping length (one way)
Outdoor unit
precharged
1,800
15m
160
20m
260
25m
360
30m
460
7m
0
10m
60
Outdoor unit
precharged
2,000
0 165 440 715 990 1,265
Refrigerant piping length (one way)
15m10m7m
Model
MUZ-GA71VA
20m
25m 30m
ADDITIONAL REFRIGERANT CHARGE(R410A : g)
Calculation : Xg=20g/m ✕ (Refrigerant piping length (m)–7)
Calculation : Xg=55g/mo(Refrigerant piping length(m)-7)
NOTE : Refrigerant piping exceeding 7m requires additional refrigerant charge according to the calculation.
14
PERFORMANCE CURVES8
8.7
8.0
7.3
6.6
5.9
5.3
MSZ-GA60VA
MUZ-GA60VA
at Rated frequency
Indoor air Wet-bulb temperature
difference (degree)
MSZ-GA50VA
MUZ-GA50VA
8.7
8.0
7.3
6.6
5.9
5.3
at Rated frequency
MSZ-GA71VA
MUZ-GA71VA
at Rated frequency
Outdoor intake air Dry-bulb temperature (:)
Outdoor intake air Dry-bulb temperature (:)
10.7
9.8
8.9
8.0
7.2
6.4
Indoor intake air W
et-bulb tem
perature (
:
)
Indoor intake air Wet-bulb temperature (
:)
MUZ-GA50VA
MUZ-GA60VA
MUZ-GA71VA
The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi-
tions 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 ~ 264V, 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
(5) Indoor intake air dry-bulb temperature : °C DB
(6) Outdoor intake air wet-bulb temperature : °C WB
(7) Total input : W
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.
}
}
Cooling
Heating
INDOOR UNIT
Wet and dry-bulb
thermometers
8-1. CAPACITY AND INPUT CURVES
OUTDOOR UNIT
Wet and dry-bulb
thermometers
15
MUZ-GA71VA
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)
Ind
oor intake air Dry-bulb tem
perature (
:
)
Outdoor intake air Wet-bulb temperature (:)
Outdoor intake air Wet-bulb temperature (:)
Indoor intake air Dry-bulb temperature (
:)
MSZ-GA50VA
MUZ-GA50VA
at Rated frequency
MSZ-GA60VA
MUZ-GA60VA
at Rated frequency
MSZ-GA71VA
MUZ-GA71VA
at Rated frequency
27.9
25.7
23.6
21.4
19.3
17.2
15.0
12.9
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
MUZ-GA60VA
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
(Hz)
NOTE:The above broken lines are for the heating operation without any
frost and defrost operation.
8-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR
16
(MPa [Gauge])
(kgf/F [Gauge])
18 32
15 2050256030
70 (%)
35(˚C)
0.3
0.4
0.5
0.6
0.7
0.8
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
32
18
Outdoor unit current(A)
Ambient temperature(˚C) Ambient humidity(%)
MUZ-GA50VA
MUZ-GA50VA
0.3
0.4
0.5
0.6
0.7
0.8
3
4
5
6
7
8
9
0.9
MUZ-GA71VA
15 205025
60
30
70 (%)
35(˚C)
5
7
9
11
13
32
18
Outdoor unit current(A)
Ambient temperature(˚C) Ambient humidity(%)
MUZ-GA71VA
(MPa [Gauge])
(kgf/F [Gauge])
18 32
15 2050256030
70 (%)
35(˚C)
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)
15 205025
60
30
70 (%)
35(˚C)
5
6
7
8
9
32
18
Ambient temperature(˚C) Ambient humidity(%)
Outdoor low pressure
Outdoor unit current(A)
Ambient temperature(˚C) Ambient humidity(%)
MUZ-GA60VA
MUZ-GA60VA
8-3. TEST RUN OPERATION (How to operate fixed-frequency 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 operates at rated frequency in COOL mode or 58Hz 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.
8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
COOL operation
1 Both indoor and outdoor unit are under the
same temperature/humidity condition.
2 Operation : TEST RUN OPERATION (refer to 8-3.)
Dry-bulb temperature(:)
20 50
25 60
Relative humidity(%)
30 70
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])
17
Loading...