Toshiba MXZ-2DM40VA User manual

HFC
utilized
R410A
NOTE:
RoHS compliant products have <G> mark
on the spec name plate.
PARTS CATALOG (OBB739)
Models
MXZ-2DM40VA -E1 ,ET1 ,ER1
MXZ-3DM50VA -E1 ,ET1 ,ER1
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 4
4. NOISE CRITERIA CURVES······························ 6
5. OUTLINES AND DIMENSIONS ························ 7
6. WIRING DIAGRAM············································ 9
7. REFRIGERANT SYSTEM DIAGRAM············· 10
8. PERFORMANCE CURVES····························· 13
9. ACTUATOR CONTROL··································· 19
10. SERVICE FUNCTIONS···································· 20
11. TROUBLESHOOTING····································· 24
12. DISASSEMBLY INSTRUCTIONS···················· 50
INDOOR UNITS COMBINATION SHEETS
Indoor unit service manual
MSZ-DM•VA Series (OBH750)
MSZ-HJ•VA Series (OBH647)
MXZ-2DM40VA
SERVICE MANUAL No. OBH739
REVISED EDITION-A
OUTDOOR UNIT
Revision A:
• MXZ-2DM40VA - ER1 and MXZ-
3DM50VA - ER1 have been added.
Please void OBH739.

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 specified 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.
TECHNICAL CHANGES
1
MXZ-2DM40VA - E1 , ET1 , ER1
MXZ-3DM50VA - E1 , ET1 , ER1
1. New model
Revision A:
• MXZ-2DM40VA - ER1 and MXZ-3DM50VA - ER1 have been added.
OBH739A

3
PART NAMES AND FUNCTIONS
2
ACCESSORIES
MXZ-2DM40VA
Air inlet
Air outlet
Drain outlet
Piping
Drain hose
(Back and side)
Model MXZ-2DM40VA MXZ-3DM50VA
Drain socket 1 1
Drain cap 2
Air outlet
Drain outlet
Air inlet
(Back and side)
MXZ-3DM50VA
OBH739A

4
SPECIFICATION
3
Outdoor model MXZ-2DM40VA
Outdoor unit power supply Single phase
230 V, 50 Hz
System
Indoor units number 2
Piping total length m Max. 30
Connecting pipe length m Max. 20
Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.) 2 kW 4.0 (1.1 - 4.3) 4.3 (1.0 - 4.7)
Breaker capacity A 15
Electrical
data
Power input (Total) 1, 2 W 1,050 1,160
Running current (Total) 1, 2 A 5.1 5.6
Power factor (Total) 1, 2% 90
Starting current (Total) 1, 2 A 5.6
Coefficient of performance (C.O.P) (Total) 1, 2 3.81 3.71
Compressor
Model KNB092FFDHC
Output W 1,100
Current 1, 2 A 4.7 5.2
Refrigeration oil (Model) L 0.32 (NEO22)
Fan motor
Model RC0J50-FA
Current 1, 2 A 0.19 0.23
Dimensions W x H x D mm 800 x 550 x 285
Weight kg 32
Special
remarks
Air flow (Rated) m3/h 1,752 1,914
Sound level (Rated) dB(A) 48 52
Fan speed (Rated) rpm 840 910
Refrigerant filling capacity (R410A) kg 0.95
1 Measured under rated operating frequency.
2 When connected with below indoor units.
MSZ-DM25VA + MSZ-DM25VA
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C
OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C
OBH739A

5
Outdoor model MXZ-3DM50VA
Outdoor unit power supply Single phase
230 V, 50 Hz
System
Indoor units number 2 to 3
Piping total length m Max. 50
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.) 2 kW 5.0 (2.7 - 6.5) 6.0 (2.4 - 7.5)
Breaker capacity A 25
Electrical
data
Power input (Total) 1, 2 W 1,130 1,310
Running current (Total) 1, 2 A 5.0 5.8
Power factor (Total) 1, 2% 99
Starting current (Total) 1, 2 A 5.8
Coefficient of performance (C.O.P) (Total) 1, 2 4.42 4.58
Compressor
Model SNB130FGBH1T
Output W 1,300
Current 1, 2 A 4.5 5.3
Refrigeration oil (Model) L 0.7 (NEO22)
Fan motor
Model SIC-71FW-F764-1
Current 1, 2 A 0.20 0.23
Dimensions W x H x D mm 840 x 710 x 330
Weight kg 57
Special
remarks
Air flow (Rated) m3/h 2,252 2,379
Sound level (Rated) dB(A) 50 53
Fan speed (Rated) rpm 630 660
Refrigerant filling capacity (R410A) kg 2.7
1 Measured under rated operating frequency.
2 When connected with below indoor units.
MSZ-DM25VA + MSZ-DM25VA + MSZ-DM25VA
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C
OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C
OBH739A

6
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
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
CoolingHigh
FUNCTION
FAN SPEED
HeatingHigh
48
SPL(dB(A))
52
LINE
NOISE CRITERIA CURVES
4
MXZ-2DM40VA
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
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
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
50
SPL(dB(A))
53
LINE
MXZ-3DM50VA
OUTDOOR UNIT
MICROPHONE
1m
Test conditions
Cooling :Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Heating :Dry-bulb temperature 7°C Wet-bulb temperature 6°C
OBH739A

7
OUTLINES AND DIMENSIONS
5
MXZ-2DM40VA
Unit: mm
OBH739A

8
1.Installation space
Note : Leave front and both sides
free of obstruction.
Note : Leave rear, overhead and
both sides free of obstruction.
500 or more
100 or more
Note : Leave front and overhead
free of obstruction.
100 or more 350 or more
200 or more
500 or more
2.Service space
100 or more
500 or more
350 or more
350 or more
100 or more Service space
Liquid pipe : Ø6.35(flared)1/4 C unit connection
B unit connection
A unit connection
Gas pipe : Ø9.52(flared)3/8
Liquid pipe : Ø6.35(flared)1/4
Gas pipe : Ø9.52(flared)3/8
Liquid pipe : Ø6.35(flared)1/4
Gas pipe : Ø9.52(flared)3/8
MXZ-3DM50VA
Unit: mm
OBH739A

9
WIRING DIAGRAM
6
MXZ-2DM40VA - E1 , ET1 , ER1
21S4
NAME
4
t°
t°
S3
N
L
12-24V
~ 230V
S3
L
N
12-24V
~ 230V
N
L
ACL, ACL2
C61~63
DB61
F701, 801, 901
F1
IC700, 820, 932
IC802
LED1, 2
SYMBOL
/
NOTES:
RT68
TB1~3
T801
X63, 64, 66
21S4
SYMBOLNAME
LEV A, B
MC
MF
PTC64, 65
RT61
RT62
RT64
RT65
SYMBOLNAME
:Terminal block
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.
:Connector
t°t°
MF
-
~
+
~
MC
LEV A
X64
PTC64
1
3
1CN644
4
CN641
RT68RT62
t° RT61
CN935 7
CN725
1
5
M
LEV B
F701
LD61
61CN724 6
5
M
PTC65
X63
CN721 2
1
X66
13
CN722
TO INDOOR
UNIT No. B
TO INDOOR
UNIT No. A
POWER SUPPLY
~/N
230V 50Hz
BLK
BLU
BLK
BLU
RED
ORN
ACL2
TB3
TB2
BLK
BLU
BREAKER
CIRCUIT
GRN/YLW TB1
F1
3
LD66B
LD62
CN602
5
CN601
1
LD-E1
LD-E2
1
BLK
BLU
BLK
BRN
BLK
BLU
RED
ORN
LED1 LED2
CN936
OUTDOOR
DISPLAY
P.C. BOARD
7
1
7
31
31
MS
3~
WVU
RED WHT
F901
T801
F801 IC802
+
C62
+
C61C63
+
ACL
12
CN642
BRNORN
35
1CN931
MS
3~
51 2
1CN643
RT65RT64
INVERTER P.C. BOARD
IC700
CNMC
P
U
V
W
N
IC932
N
P
U
W
V
DB61
IC820
CN932
1
3
LD66A
LD70
LDW
LDV
LDU
RED
BLK
WHT
RED
BLK WHT
BLK
REACTOR
SMOOTHING CAPACITOR
DIODE MODULE
FUSE (T3.15AL250V)
FUSE (T3.15AL250V)
POWER MODULE
POWER DEVICE
LED
EXPANSION VALVE COIL
COMPRESSOR
FAN MOTOR
CIRCUIT PROTECTOR
DEFROST THERMISTOR
DISCHARGE TEMP. THERMISTOR
FIN TEMP. THERMISTOR
AMBIENT TEMP. THERMISTOR
OUTDOOR HEAT EXCHANGER
TEMP. THERMISTOR
TERMINAL BLOCK
SWITCHING TRANS
RELAY
REVERSING VALVE COIL
MXZ-3DM50VA - E1 , ET1 , ER1
X712 X714
OUTDOOR
POWER P.C.
BOARD
+
CB1
+
CB2
+
CB3
BLK
CN661
18
CN665
21
RT65
t°
RT62
t°
RT68RT61
t°t°
(WHT) (WHT)(RED) CN791CN793 (BLU) CN792
LEV C
M
LEV B
M
LEV A
M
5
16
5
16
5
16
CN621
1
CN611
3
CN601
1
3
5
1
YLW
ORN
BLK
BLU
RED
TO INDOOR
UNIT No.C S3
L
NYLW
BLU
BLK
TO INDOOR
UNIT No.B S3
L
NBLU
ORN
BLK
S3
TO INDOOR
UNIT No.A
L
N
BLK
RED
BLU
BLK
BLU
TB2
TB3
TB4
BLK
BLK
F66
5
CN3
51
F930
MF
5MS
3~
CN7
2
11
CN904
2
F711
CN712
12 CN714
12
CN62 31
CN711
31
12-24V
12-24V
12-24V
LED1
IC801
16
5
4
~ 230V
~ 230V
~ 230V
HPS
CN681
2
1
CN5
2
CN931
CN702
CN795
1
CN2
S
CN701 1
1
2
7
1
R
1
2
CN801
U
CN9
LD9
3
7
F801
V
1
CN4
4
IPM
LED2
1
T801
PFC
W
2
1
LED3
1
LD2
t°
2
3
7 LD1
LDE1
CN903
1
TAB4
2
3
1
X64
5
CN61
CN901
F64
3
1
POWER SUPPLY
~/N 230V 50Hz BLK
WHT
RED
YLW
BLK
BLK
BLK
BLK
BLK
BLK
BLK
L
BLK BLK RED WHT
21S4
BLK
RT64
M
LEV E
MC
MS
3~
V
BLK
WHT
RED
U
W
BLK
BLU
N
L
CIRCUIT
BREAKER TB1
TAB2
TAB1
F65
GRN/YLW
NOISE FILTER P.C.BOARD
OUTDOOR CONTROL P.C.BOARD
PTC65
PTC64
RELAY
REVERSING VALVE SOLENOID COIL
X712,714
21S4
SYMBOL SYMBOL SYMBOL SYMBOL
SYMBOL
NAME
NAMENAMENAMENAME
CB1~3
F64
F65, 66
F711, 801,
930
HPS
SMOOTHING CAPACITOR
FUSE (T2AL250V)
FUSE (T6.3AL250V)
FUSE (T3.15AL250V)
HIGH PRESSURE SWITCH
RT64
RT65
RT68
T801
TB1~4
X64
FIN TEMP. THERMISTOR
AMBIENT TEMP. THERMISTOR
OUTDOOR HEAT EXCHANGER TEMP. THERMISTOR
TRANSFORMER
TERMINAL BLOCK
RELAY
MC
MF
PFC
PTC64, 65
RT61
RT62
COMPRESSOR
FAN MOTOR
POWER FACTOR CONTROLLER
CIRCUIT PROTECTION
DEFROST THERMISTOR
DISCHARGE TEMP. THERMISTOR
IC801
IPM
L
LED1, 2, 3
LEV A~C
LEV E
POWER DEVICE
POWER MODULE
REACTOR
LED
EXPANSION VALVE COIL
EXPANSION VALVE COIL
NOTES: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
OBH739A

10
UNIT: mm (inch)
MXZ-2DM40VA
a
b
Outdoor
unit
Indoor
units
15 m
10 m
15 m
Max.
Height
difference
Outdoor unit union diameter
For
Indoor unit A Liquid 6.35(1/4)
Gas 9.52(3/8)
Indoor unit B Liquid 6.35(1/4)
Gas 9.52(3/8)
Stop valve
(with strainer #100) LEV A
LEV B
Compressor
Muffler
4-way valve
Indoor unit
B
Indoor unit
A
Indoor unit
A
Indoor unit
B
Capillary tube
Capillary tube
Stop valve
(with strainer #100)
Refrigerant flow in cooling
Refrigerant flow in heating
Discharge
temperature
thermistor RT62
Stop valve
(with service port)
Stop valve
(with service port)
Strainer
#100
Sub muffler
Defrost
thermistor
RT61
Ambient
temperature
thermistor
RT65
Outdoor heat
exchanger
temperature
thermistor
RT68 FAN-OUT
HEX-OUT
UNIT: mm
REFRIGERANT SYSTEM DIAGRAM
7
MAX REFRIGERANT PIPING LENGTH
Piping length each indoor unit (a, b) 20 m
Total piping length (a+b) 30 m
Bending point for each unit 20
Total bending point 30
It is irrelevant which unit is higher.
ADDITIONAL REFRIGERANT CHARGE
Outdoor unit
precharged
(g)
Refrigerant piping length (one way, 2 unit total)
20 m 30 m
950 0 200
Calculation: Xg = 20 g/m x (Refrigerant piping length (m) - 20)
Refrigerant pipe diameter is different according to indoor unit to be
connected. When using extension pipes, refer to the right table.
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, refer to "PARTS
CATALOG".
OBH739A