Mitsubishi MXZ-18TV-E1, MXZ-18TV-E2 Service Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONER
SERVICE MANUAL
Inverter-controlled multi system
Model
Revision:
• MXZ-18TV - has been added.
• Please void OB280.
E2
No. OB280
REVISED EDITION-A
MXZ-18TV MXZ-18TV -
Model indication
E1
E2
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. INDOOR/OUTDOOR
CORRESPONDENCE TABLE ···························3
4. INDOOR UNITS COMBINATION ·······················3
5. SPECIFICATION·················································4
6. NOISE CRITERIA CURVES······························ 5
7. OUTLINES AND DIMENSIONS························ 6
8. WIRING DIAGRAM ············································7
9. REFRIGERANT SYSTEM DIAGRAM················8
10. PERFORMANCE CURVES································9
11. MICROPROCESSOR CONTROL·····················14
12. TROUBLESHOOTING ······································19
13. DISASSEMBLY INSTRUCTIONS·····················29
14. PARTS LIST······················································32
15. OPTIONAL PARTS ···········································34
This manual describes technical data of outdoor unit.
For the indoor unit refer to the service manuals No. OB229, OB227 REVISED EDITION-B, OB252 REVISED EDITION-A,OC280 REVISED EDITION-A,OC281 REVISED EDITION-A and OC165 of corresponding models.
1
TECHNICAL CHANGES
MXZ-18RV - ➔ MXZ-18TV -
1. The combination pattern of indoor unit has increased.
2. Outside dimension of the outdoor unit changed.
3. Ball valve has changed to stop valve.
4. Accumulator has been removed.
5. Hight pressure switch has been removed.
6. Compressor has changed.
7. Refrigerant filling capacity has changed. (1.3kg ➝ 1.55kg)
MXZ-18TV - ➔ MXZ-18TV -
1.Combinations of the connectable indoor units have increased.
2. FUSE(F912) and Varistor(NR63) on Noise filter P.C. board has changed.
3. Accordance with the change, the board of E2 can be used for E1.
4. The board of E1 can not be used for E2.
E1E1
E2E1
2
PART NAMES AND FUNCTIONS
OUTDOOR UNIT
MXZ-18TVMXZ-18TV-
E1
E2
Air outlet
Air inlet
(back and side)
Model indication
2
3
❈There is no combination other than this table.
MXZ-18TV-
E1
OUTDOOR UNIT
Combination of the
connectable indoor units
07+09
07+12
07+SEH-1.6
09+09
09+12
09+SEH-1.6
12+12
MXZ-18TV-
E2
07+09
07+SLH-1
07+12
07+SEH-1.6
07+SLH-1.6
09+0.9
09+SLH-1
09+12
09+SEH-1.6
09+SLH-1.6
SLH-1+SLH-1
SLH-1+12
SLH-1+SEH-1.6
SLH-1+SLH-1.6
12+12
12+SLH-1.6
SLH-1.6+SLH-1.6
07
09
12
07+09
07+12
09+09
09+12
12+12
90
90
90
90
90
90
90
90
3.88
4.17
6.22
8.79
8.85
8.88
9.00
9.07
2.3
(0.9-2.8)
2.5
(0.9-3.0)
3.4
(0.9-3.8)
4.8
(1.49-5.25)
5.0
(1.51-5.45)
5.0
(1.51-5.45)
5.2
(1.53-5.60)
5.3
(1.55-5.70)
0.850
(0.225-1.055)
0.865
(0.225-1.125)
1.29
(0.220-1.550)
1.82
(0.370-2.11)
1.835
(0.365-2.125)
1.840
(0.370-2.130)
1.865
(0.365-2.145)
1.88
(0.370-2.190)
–
–
–
2.5
2.98
2.5
3.0
2.65
2.3
2.5
3.4
2.3
2.02
2.5
2.2
2.65
Indoor units
combination
Unit A Unit B
Cooling capacity (kW)
Total
Outdoor unit
power consumption
(kW)
Current
(A)
Power
factor
(%)
230V
NOTE: Electrical data is for outdoor unit only.
MXZ-18TV -
E1 , MXZ-18TV - E2
NOTE: Electrical data is for outdoor unit only.
07
09
12
07+09
07+12
09+09
09+12
12+12
90
90
90
90
90
90
90
90
4.85
5.23
6.95
9.27
9.14
9.17
8.81
8.64
3.3
(0.9-4.0)
3.6
(0.9-4.5)
4.0
(0.9-4.7)
6.2
(1.53-6.70)
6.5
(1.55-7.00)
6.5
(1.55-7.0)
6.55
(1.56-7.1)
6.6
(1.58-7.2)
1.005
(0.225-1.115)
1.085
(0.225-1.195)
1.440
(0.220-1.490)
1.92
(0.300-2.030)
1.895
(0.295-2.005)
1.900
(0.300-2.010)
1.825
(0.295-1.925)
1.790
(0.290-1.840)
–
–
–
3.23
3.88
3.25
3.77
3.30
3.3
3.6
4.0
2.97
2.62
3.25
2.78
3.30
Indoor units
combination
Unit A Unit B
Heating capacity (kW)
Total
Outdoor unit
power consumption
(kW)
Current
(A)
Power
factor
(%)
230V
INDOOR / OUTDOOR CORRESPONDENCE TABLE
4
INDOOR UNITS COMBINATION
NOTE: SLH-1AR is equivalent to class 9 (9000BTU).
SEH-1.6AR,SLH-1.6AR is equivalent to class 12 (12000BTU).
3
5
Outdoor model
Indoor units number
Indoor units total capacity (Connectable)
indoor units total capacity (Simultaneous operation)
Piping total length
Connecting pipe length
Height difference (Indoor ~ Outdoor)
Height difference (Indoor ~ Indoor)
Function
Capacity
Dehumidification
Outdoor air flow
Power outlet
Running current
Power input
Auxiliary heater
Crankcase heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance(at20:)
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Sound level (Hi)
Fan speed (Hi)
Fan speed regulator
Refrigerant filling
capacity(R-22)
Refrigerating oil (Model)
Thermistor RT61
Thermistor RT62
Thermistor RT63
Thermistor RT65,66
Thermistor RT67
m
m
m
m
kW
R/h
K /h
A
A
W
A(kW)
W
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
k"
k"
k"
k"
k"
Compressor
Electrical
data
Fan
motor
Special
remarks
Capacity System
Coefficient of performance(C.O.P)
Outdoor unit power supply
MXZ-18TV -
E1
,
MXZ-18TV -
E2
Single phase
230V,50Hz
2
Total model name 24
Total model name 24
Max. 30 (chargeless 20)
Max. 20
10
10
1,860
20
—
—
90.0
9.08
0.38
SHV-130FEA (ROTARY)
1,400
U-V 0.45
V-W 0.45 W-U 0.45
RA6V35-AA
WHT-BLK 236.2 BLK-YLW 48.1
BLK-RED 224.1
800(+69)o600o300
46
630
2
1.55
350 (MS-56)
13.4 (at 100:)
10.0 (at 25:)
10.0 (at 25:)
10.0 (at 25:)
17.0 (at 50:)
Cooling
5.3 (1.55~5.7)
—
9.08
1,880 (370~2,190)
8.70
2.82
48
Heating
6.6 (1.58~7.2)
—
8.64
1,790 (290~1,840)
8.26
3.69
49
SPECIFICATION
NOTE: Test conditions are based on ISO 5151 (Refrigerant piping length (one way) :5m
✽1 Electrical data is for only outdoor unit.
TEST CONDITIONS COOLING INDOOR DB27.0°C WB19.0°C
HEATING INDOOR DB20.0°C
OUTDOOR DB35.0°C WB24.0°C
OUTDOOR DB 7.0°C WB 6.0°C
4
NOISE CRITERIA CURVES6
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling :DB 35: WB 24:
Heating :DB 7: WB 6:
Cooling
NOTCH
Heating
48
SPL(dB(A))
49
LINE
MXZ-18TV -
E1
MXZ-18TV -
E2
5
7
OUTLINES AND DIMENSIONS
OUTDOOR UNIT
MXZ-18TV MXZ-18TV -
E1
E2
Drainage hole {33
23
Bolt pitch for installation
43.6
152
Air in
45.4
16
Handle
400
347.5
Air in
Air out
113
500
800
Drainage
hole {33
155
Unit: mm
REQUIRED SPACE
Even if the right / left sides or
back side are vacant, the top
has to be at least 100mm
unobstructed.
100mm or more
34
17300
WA
200mm or more
WB
330
However, either the
left / right sides or
back side should
34
40
69
17
Handle
be unobstructed.
WA In case of poorly-ventilated place, the front
or the back has to be at least 200mm
unobstructed.
WB The wall may get dirty in case the air is
discharged toward it.
Liquid refrigerant pipe joint
Refrigerant pipe (flared) {6.35
WA
Basically
unobstructed
100mm or more
350mm or more
300
600
Service
port
165
90 65 65 65
Gas refrigerant pipe joint
Refrigerant pipe (flared) {9.52
6
8
R61
IPM
FUSE(1A)
T801
CT62
WVU
TAB61
TAB65
C65
SSR61
CN664 CN663 CN661
66
MF61
CN912CN911
21S4
CN61
R62
TAB62
V
W
U
MC
BLK
WHT
RED RED
WHT
BLK
PE
F911(1A)
BLU
ORN
YLW
TB2
BLK
BREAKER
GRN/YLW
CIRCUIT
POWER
SUPPLY
~/N
230V~
50Hz
TB1
TO INDOOR
UNIT No.B
CONNECTING
12V
TO INDOOR
UNIT No.A
CONNECTING
12V
N
L
N
3
N
3
GROUND
BLK
BLU
BLK
BLU
GRN
RED
X62
X61
X64
R64B
CT61
TAB2
TAB1
LDE
CN601CN602
CN851
TAB4
CN901
L
DS62
DS61
C61 C62
7
ORN
BLU
RED
YLW
YLW
RED
4
FUSE(20A)
ELECTRONIC CONTROL
P.C. BOARD
21 2165 4321
RT65RT66RT61RT67
LEV ALEV B
CN772 CN771
43
RT62RT63
654321 3214
123
3214567
1234567
123123
NOISE FILTER
P.C.BOARD
–
++
–
–
+
–
+
NAMESYMBOLNAMESYMBOL
1.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
2.Use copper conductors only (For field wiring).
3.Symbols below indicate.
:Terminal block :Connector
NAMESYMBOL
NOTES:
C61
C62
C65
CT61
CT62
DS61,DS62
FUSE
FUSE
F911
IPM
L
POWER-FACTOR CAPACITOR
SMOOTHING CAPACITOR
FAN MOTOR CAPACITOR
CURRENT TRANSFORMER
CURRENT TRANSFORMER
DIODE MODULE
FUSE(20A)
FUSE(1A)
FUSE(1A)
POWER TRANSISTOR MODULE
REACTOR
R64A,R64B
R61,R62
LEV A
LEV B
21S4
MC
MF61
RT61
RT62
RT63
RT65
RESISTOR
RESISTOR
EXPANSION VALVE A,COIL
EXPANSION VALVE B,COIL
REVERSING VALVE SOLENOID COIL
COMPRESSOR
FAN MOTOR
DISCHARGE TEMP. THERMISTOR
DEFROST TEMP. THERMISTOR
EVAPORATOR TEMP. THERMISTOR
GAS PIPE TEMP. A THERMISTOR
RT66
RT67
SSR61
T801
TB1
TB2
X61
X62
X64
CN61
F912
GAS PIPE TEMP. B THERMISTOR
FIN TEMP. THERMISTOR
SOLENOID COIL RELAY
TRANSFORMER
TERMINAL BLOCK
TERMINAL BLOCK
FAN MOTOR RELAY
FAN MOTOR RELAY
RELAY
CONNECTOR
FUSE(3.15A)
SG79J657H01
R64A
F912(3.15A)
R61
IPM
FUSE(1A)
T801
CT62
WVU
TAB61
TAB65
C65
SSR61
CN664 CN663 CN661
66
MF61
CN912CN911
21S4
CN61
R62
TAB62
V
W
U
MC
BLK
WHT
RED RED
WHT
BLK
PE
F911(1A)
BLU
ORN
YLW
TB2
BLK
BREAKER
GRN/YLW
CIRCUIT
POWER
SUPPLY
~/N
230V~
50Hz
TB1
TO INDOOR
UNIT No.B
CONNECTING
12V
TO INDOOR
UNIT No.A
CONNECTING
12V
N
L
N
3
N
3
GROUND
BLK
BLU
BLK
BLU
GRN
RED
X62
X61
X64
R64
CT61
TAB2
TAB1
LDE
CN601CN602
CN851
TAB4
CN901
L
DS62
DS61
C61 C62
7
ORN
BLU
RED
YLW
YLW
RED
4
FUSE(20A)
ELECTRONIC CONTROL
P.C. BOARD
21 2165 4321
RT65RT66RT61RT67
LEV ALEV B
CN772 CN771
43
RT62RT63
654321 3214
123
3214567
1234567
123123
NOISE FILTER
P.C.BOARD
–
++
–
–
+
–
+
NAMESYMBOLNAMESYMBOL
1.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
2.Use copper conductors only (For field wiring).
3.Symbols below indicate.
:Terminal block :Connector
NAMESYMBOL
NOTES:
C61
C62
C65
CT61
CT62
DS61,DS62
FUSE
FUSE
F911
IPM
L
POWER-FACTOR CAPACITOR
SMOOTHING CAPACITOR
FAN MOTOR CAPACITOR
CURRENT TRANSFORMER
CURRENT TRANSFORMER
DIODE MODULE
FUSE(20A)
FUSE(1A)
FUSE(1A)
POWER TRANSISTOR MODULE
REACTOR
R64
R61,R62
LEV A
LEV B
21S4
MC
MF61
RT61
RT62
RT63
RT65
RESISTOR
RESISTOR
EXPANSION VALVE A,COIL
EXPANSION VALVE B,COIL
REVERSING VALVE SOLENOID COIL
COMPRESSOR
FAN MOTOR
DISCHARGE TEMP. THERMISTOR
DEFROST TEMP. THERMISTOR
EVAPORATOR TEMP. THERMISTOR
GAS PIPE TEMP. A THERMISTOR
RT66
RT67
SSR61
T801
TB1
TB2
X61
X62
X64
CN61
GAS PIPE TEMP. B THERMISTOR
FIN TEMP. THERMISTOR
SOLENOID COIL RELAY
TRANSFORMER
TERMINAL BLOCK
TERMINAL BLOCK
FAN MOTOR RELAY
FAN MOTOR RELAY
RELAY
CONNECTOR
SG79J191H01
WIRING DIAGRAM
OUTDOOR UNIT
OUTDOOR UNIT
MODELS MXZ-18TV-
MODELS MXZ-18TV-
E1
E2
7
9
a
Outdoor
unit
b
H
H
H
REFRIGERANT SYSTEM DIAGRAM
MXZ-18TV MXZ-18TV -
Stop valve
(with service port)
Indoor
Unit B
Indoor
Unit A
Stop valve
(with service port)
Indoor
Unit A
Indoor
Unit B
E1
E2
Stop valve
Stop valve
Discharge
temperature
thermistor
Gas pipe temperature
B thermistor
Muffler
Gas pipe temperature
A thermistor
Capillary tube
{3.0✕{2.0✕400
{6
Strainer
{6
Strainer
Capillary tube
{3.0✕{2.0✕400
Compressor
Muffler
4-way valve
LEV (A)
LEV (B)
{8
Capillary tube
{2.4✕{0.6✕750
{16
Evaporation
temperatuer
thermistor
R.V. coil
heating ON
cooling OFF
{12
Unit:mm
Refrigerant flow in cooling
Refrigerant flow in heating
Outdoor
heat
exchanger
Defrost
thermistor
Capillary tube
{4.0✕{2.4✕300
MAX REFRIGERANT PIPING LENGTH
-
MXY-18TV
MXY-18TV
Piping length each indoor unit (a, b) 20m
Total piping length (a+b) 30m
Height difference between units (H) 10m
Bending point for each unit 15
Total bending point 30
❋It does not matter which unit is higher.
● Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the
tables below.
● When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
For further information on Different-diameter pipe, see page BACK COVER.
class Pipe diameter
07/09
12
NOTE: SEH-1.6AR is equivalent to class 12.
E1
-
E2
Indoor unit
Extension pipe diameter
Liquid 6.35(1/4) Liquid 6.35(1/4)
Gas 9.52(3/8) Gas 9.52(3/8)
Liquid 6.35(1/4) Liquid 6.35(1/4)
Gas 12.7(1/2) Gas 12.7(1/2)
Outdoor unit union diameter
For
Indoor unit A
Indoor unit B
Unit : mm (inch)
Liquid 6.35(1/4)
Gas 9.52(3/8)
Liquid 6.35(1/4)
Gas 9.52(3/8)
8
10
Wet-and dry-bulb
thermometers
Wet-and dry-bulb
thermometers
07 class
7.7
7.2
6.6
6.1
5.5
5.0
9.3
8.6
7.9
7.3
6.6
6.0
8.4
7.8
7.2
6.6
6.0
5.4
12 class
09 class
25.9
23.9
21.9
19.9
17.9
15.9
13.9
11.9
23.6
21.8
19.9
18.1
16.3
14.5
12.7
10.9
25.7
23.7
21.8
19.8
17.8
15.8
13.8
11.9
07 class
09 class
12 class
PERFORMANCE CURVES
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
198 ~ 264V
, 50Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature : °CWB
(2) Indoor outlet air wet-bulb temperature : °CWB
(3) Outdoor intake air dry-bulb temperature : °CDB
}
Cooling
(4) Total input: W
(5) Indoor intake air dry-bulb temperature : °CDB
(6) Outdoor intake air wet-bulb temperature : °CWB
(7) Total input : W
Heating
}
Indoor air wet/dry-bulb temperature difference on the left side of the chart on page 10 and 11 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 OUTDOOR UNIT
10-1. CAPACITY AND THE INPUT CURVES
9
10-2. Capacity and input correction by inverter output frequency
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
0 50 100 150
0.5
1.0
1.5
<COOL>Capacity
Frequency
Hz
Frequency
<COOL>Total input
Hz Hz
<HEAT>Capacity
Frequency
Frequency
<HEAT>Total input
Hz
<COOL>Capacity
Frequency
Hz
Frequency
<COOL>Total input
Hz
<HEAT>Capacity
Frequency
0 50 100 150
0.5
1.0
1.5
Frequency
<HEAT>Total input
Hz
<COOL>Capacity
Frequency
Hz
Frequency
<COOL>Total input
Hz
<HEAT>Capacity
Frequency
Hz
Hz
Frequency
<HEAT>Total input
Hz
1. 07-class unit in single operation
2. 09-class unit in single operation
3. 12-class unit in single operation
NOTE 1 : Inverter output frequency : COOL 55Hz,HEAT 80Hz
(OUTDOOR UNIT:MXZ-18TV)
NOTE 2 : The dotted line on graphs connects the frequency range in normal operation shown by the full line and the frequency
in test run shown by the point.
10
10-3. Outdoor low pressure and outdoor unit current
1. 07-class unit in single operation (OUTDOOR UNIT : MXZ-18TV)
NOTE:The unit of pressure has been changed to MPa on the international system of units(SI unit system).
The converted score against the traditional unit system can be gotten according to the formula below.
1(MPa • G) =10.2(kgf/ff• G)
(1) COOL operation
1Both indoor and outdoor units are under the same
temperature/humidity condition.
Dry-bulb temperature(°C) Relative humidity(%)
20 50
25 60
30 70
2Air flow speed : HI
3Inverter output frequency : 55Hz
(kgf/F• Gauge)
Outdoor low pressure
(MPa•Gauge)
8
7
6
5
4
3
2
0.8
0.7
0.6
0.5
0.4
0.3
0.2
Ambient temperature(:)/ Ambient humidity(%)
20 25
18
50 60
30
70
55Hz
32
<How to work fixed-frequency operation>
1.Set emergency switch to COOL or HEAT.The switch is located on indoor unit.
2.Press emergency run ON/OFF button.
3.Compressor starts running at 55Hz (COOL) or 80Hz (HEAT).
4.Indoor fan runs at HI speed and continues for 30 minutes.
5.To cancel this operation,press emergency run ON/OFF button
or any button on remote controller.
4
55Hz
3.5
3
2.5
2
Outdoor unit current (A)
1.5
(%)
(:)
0.5
Ambient temperature(:)/ Ambient humidity(%)
20 25
18
50 60
30
70
32
(:)
(%)
(2) HEAT operation
①
Indoor Outdoor
➁
Set air flow to Hi speed.
➂
Inverter output frequency is 80Hz.
DB(°C) 20.0
WB(°C) 14.5
DB(°C) 2 7 15 20.0
WB(°C) 1 6 12 14.5
8
7
6
5
4
Outdoor unit current (A)
3
2
2 5 10 15 20 25
80Hz
Ambient temperature(:)
11
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