Mitsubishi Electric SEZ-KD25VAQ.TH User manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. PART NAMES AND FUNCTIONS ········2
2. SPECIFICATIONS·································4
3. OUTLINES AND DIMENSIONS··········17
4. WIRING DIAGRAM ·····························18
5. REFRIGERANT SYSTEM DIAGRAM ·······19
6. TROUBLESHOOTING·························20
7. DISASSEMBLY PROCEDURE ···········32
INDOOR UNIT
Indoor unit
[Model names] [Service Ref.]
SEZ-KD25VAQ SEZ-KD25VAQ.TH
SEZ-KD35VAQ SEZ-KD35VAQ.TH
SEZ-KD50VAQ SEZ-KD50VAQ.TH
SEZ-KD60VAQ SEZ-KD60VAQ.TH
SEZ-KD71VAQ SEZ-KD71VAQ.TH
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
WIRED REMOTE
CONTROLLER
(option)
ON/OFF
TEMP.
Model name
indication
No.HWE10080
REVISED EDITION-B
December 2010

2
1PART NAMES AND FUNCTIONS
Indoor Unit
Air outlet duct flange
Air outlet
Air inlet
● Operation buttons
Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
Wired remote controller (option)
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
Set Temperature buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
door
Start/Stop button
Fan Speed button
Filter button
(<return sign> button)
Test Run button
Service button (Clear button)
Airflow Up/Down button
Louver button
(Operation button)
To preceding operation
number
Ventilation button
(Operation button)
To next operation number

3
●Display
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
˚F˚C
˚F˚C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is sup-
ported.
“Centrally Controlled” indicator
Indicates that operation of the re-
mote controller has been prohib-
ited by a master controller.
“Timer Is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, shows the time
remaining.
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
Comes on when it is time to clean the
filter.
Timer indicators
The indicator comes on if the corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Displayed if the airflow is set to
Low and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow di-
rection also changes.
Room Temperature display
Shows the room temperature.
Louver display
Indicates the action of the swing
louver. Does not appear if the
louver is stationary.
(Power On indicator)
Indicates that the power is on.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Caution
●Only the Power on indicator lights when the unit is stopped and power supplied to the unit.
●If you press a button for a feature that is not installed in the indoor unit, the remote controller will display the “Not Available”
message.
If you are using the remote controller to operate multiple indoor units, this message will appear only if the feature is not
present at the parent unit.
●When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indication
(For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappears then start the operation.

4
2SPECIFICATIONS
kW
kW
A
˚C(˚F)
Fan
Pa
kW
m3/min
mm
In.
kg
mm(in.)
A
Liquid mm(in.)
Gas mm(in.)
mm(in.)
dB<A>
Net weight
R410A
Motor output
Airflow rate(Low-Mid-High)
Motor type
External finish
Wiring
Capacity
Model Name
Power source
Optional parts
Remark
Document
Standard
attachment
Power input
Current
Type x Quantity
Airflow direction
Temperature set range Remote controller
Varistor
External static press
Driving mechanism
External dimension
Drain piping diameter
H x W x D
<Cooling> Indoor: 27˚CD.B./19˚CW.B. (81˚FD.B. / 66˚FW.B. Outdoor:35˚CD.B. (95˚FD.B. )
Insulation material
Air filter
Connectable outdoor unit
Refrigerant control device
Protection devices
Note
Pipe length: 7.5m (24-9/16ft) Height difference: 0m (0ft)
2.The external static pressure is set to 15 Pa at factory shipment.
<Heating> Indoor:20˚CD.B. (68˚FD.B.) Outdoor:7˚CD.B. / 6˚CW.B. (45˚FD.B. / 43˚FW.B.)
1.Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Refrigerant
piping diameter R410A
Noise level (Low-Mid-High)
(measured in anechoic room)
Heat exchanger
Terminal block
Power outlet A
Accessory *3
Min.size of wire
Amperage of wire breaker
Cooling
2.5
0.04
0.39
19 to 30 (67 to 86)
Heating
3.0
0.04
0.39
17 to 28 (63 to 83)
230V (50Hz)
-
Sirocco fan x 2
5-15-35-50
DC blushless motor
0.096
Direct-driven
5.5-7.0-9.0
Galvanized
200 x 700 x 700
7-7/8 x 27-9/16 x 27-9/16
18
1.6 (1/8)
15
ø6.35 (ø1/4) Flare
ø9.52 (ø3/8) Flare
O.D. 32 (1-9/32)
23-26-30
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
-
R410A SUZ-KA25VA(H)
Fuse (250V 6.3A)
Cross fin (Aluminum fin and copper tube)
ERZV10D471
To outdoor unit : 3P To wired remote controller : 2P
10
Installation Manual, Instruction Book
Drain hose (flexible joint), Remote Controller
Drain Iift-up mechanism (PAC-KE07DM-E)
SEZ-KD25VAQ
Cooling
3.5
0.05
0.46
19 to 30 (67 to 86)
Heating
4.0
0.05
0.46
17 to 28 (63 to 83)
230V (50Hz)
-
Sirocco fan x 2
5-15-35-50
DC blushless motor
0.096
Direct-driven
7.0-9.0-11.0
Galvanized
200 x 900 x 700
7-7/8 x 35-7/16 x 27-9/16
21
1.6 (1/8)
15
ø6.35 (ø1/4) Flare
ø9.52 (ø3/8) Flare
O.D. 32 (1-9/32)
23-28-33
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
-
R410A SUZ-KA35VA(H)
Fuse (250V 6.3A)
Cross fin (Aluminum fin and copper tube)
ERZV10D471
To outdoor unit : 3P To wired remote controller : 2P
10
Installation Manual, Instruction Book
Drain hose (flexible joint), Remote Controller
Drain Iift-up mechanism (PAC-KE07DM-E)
SEZ-KD35VAQ

5
kW
kW
A
˚C(˚F)
Fan
Pa
kW
m3/min
mm
In.
kg
mm(in.)
A
Liquid mm(in.)
Gas mm(in.)
mm(in.)
dB<A>
Net weight
R410A
Motor output
Airflow rate(Low-Mid-High)
Motor type
External finish
Wiring
Capacity
Model Name
Power source
Optional parts
Remark
Document
Standard
attachment
Power input
Current
Type x Quantity
Airflow direction
Temperature set range Remote controller
Varistor
External static press
Driving mechanism
External dimension
Drain piping diameter
H x W x D
<Cooling> Indoor: 27˚CD.B./19˚CW.B. (81˚FD.B. / 66˚FW.B. Outdoor:35˚CD.B. (95˚FD.B. )
Insulation material
Air filter
Connectable outdoor unit
Refrigerant control device
Protection devices
Note
Pipe length: 7.5m (24-9/16ft) Height difference: 0m (0ft)
2.The external static pressure is set to 15 Pa at factory shipment.
<Heating> Indoor:20˚CD.B. (68˚FD.B.) Outdoor:7˚CD.B. / 6˚CW.B. (45˚FD.B. / 43˚FW.B.)
1.Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Refrigerant
piping diameter R410A
Noise level (Low-Mid-High)
(measured in anechoic room)
Heat exchanger
Terminal block
Power outlet A
Accessory *3
Min.size of wire
Amperage of wire breaker
Cooling
5.0
0.07
0.63
19 to 30 (67 to 86)
Heating
6.0
0.07
0.63
17 to 28 (63 to 83)
230V (50Hz)
-
Sirocco fan x 3
5-15-35-50
DC blushless motor
0.096
Direct-driven
10.0-12.5-15.0
Galvanized
200 x 900 x 700
7-7/8 x 35-7/16 x 27-9/16
23
1.6 (1/8)
15
ø6.35 (ø1/4) Flare
ø12.7 (ø1/2) Flare
O.D. 32 (1-9/32)
30-34-37
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
-
R410A SUZ-KA50VA
Fuse (250V 6.3A)
Cross fin (Aluminum fin and copper tube)
ERZV10D471
To outdoor unit : 3P To wired remote controller : 2P
20
Installation Manual, Instruction Book
Drain hose (flexible joint), Remote Controller
Drain Iift-up mechanism (PAC-KE07DM-E)
SEZ-KD50VAQ
Cooling
5.5
0.07
0.63
19 to 30 (67 to 86)
Heating
7.0
0.07
0.63
17 to 28 (63 to 83)
230V (50Hz)
-
Sirocco fan x 4
5-15-35-50
DC blushless motor
0.096
Direct-driven
12.0-15.0-18.0
Galvanized
200 x 1100 x 700
7-7/8 x 43-5/16 x 27-9/16
27
1.6 (1/8)
15
ø6.35 (ø1/4) Flare
ø15.88 (ø5/8) Flare
O.D. 32 (1-9/32)
30-34-38
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
-
R410A SUZ-KA60VA
Fuse (250V 6.3A)
Cross fin (Aluminum fin and copper tube)
ERZV10D471
To outdoor unit : 3P To wired remote controller : 2P
20
Installation Manual, Instruction Book
Drain hose (flexible joint), Remote Controller
Drain Iift-up mechanism (PAC-KE07DM-E)
SEZ-KD60VAQ

6
kW
kW
A
˚C(˚F)
Fan
Pa
kW
m3/min
mm
In.
kg
mm(in.)
A
Liquid mm(in.)
Gas mm(in.)
mm(in.)
dB<A>
Net weight
R410A
Motor output
Airflow rate(Low-Mid-High)
Motor type
External finish
Wiring
Capacity
Model Name
Power source
Optional parts
Remark
Document
Standard
attachment
Power input
Current
Type x Quantity
Airflow direction
Temperature set range Remote controller
Varistor
External static press
Driving mechanism
External dimension
Drain piping diameter
H x W x D
<Cooling> Indoor: 27˚CD.B./19˚CW.B. (81˚FD.B. / 66˚FW.B. Outdoor:35˚CD.B. (95˚FD.B. )
Insulation material
Air filter
Connectable outdoor unit
Refrigerant control device
Protection devices
Note
Pipe length: 7.5m (24-9/16ft) Height difference: 0m (0ft)
2.The external static pressure is set to 15 Pa at factory shipment.
<Heating> Indoor:20˚CD.B. (68˚FD.B.) Outdoor:7˚CD.B. / 6˚CW.B. (45˚FD.B. / 43˚FW.B.)
1.Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Refrigerant
piping diameter R410A
Noise level (Low-Mid-High)
(measured in anechoic room)
Heat exchanger
Terminal block
Power outlet A
Accessory *3
Min.size of wire
Amperage of wire breaker
Cooling
7.1
0.10
0.84
19 to 30 (67 to 86)
Heating
8.1
0.10
0.84
17 to 28 (63 to 83)
230V (50Hz)
-
Sirocco fan x 4
5-15-35-50
DC blushless motor
0.096
Direct-driven
12.0-16.0-20.0
Galvanized
200 x 1100 x 700
7-7/8 x 43-5/16 x 27-9/16
27
1.6 (1/8)
15
ø9.52 (ø3/8) Flare
ø15.88 (ø5/8) Flare
O.D. 32 (1-9/32)
30-35-40
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
-
R410A SUZ-KA71VA
Fuse (250V 6.3A)
Cross fin (Aluminum fin and copper tube)
ERZV10D471
To outdoor unit : 3P To wired remote controller : 2P
20
Installation Manual, Instruction Book
Drain hose (flexible joint), Remote Controller
Drain Iift-up mechanism (PAC-KE07DM-E)
SEZ-KD71VAQ

7
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD25VAQ.TH
External static pressure: 15Pa High
Middle
30
SPL(dB)
26
Low 23
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD25VAQ.TH
External static pressure: 5Pa High
Middle
29
SPL(dB)
25
Low 22
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD25VAQ.TH
External static pressure: 50Pa High
Middle
33
SPL(dB)
29
Low 25
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD25VAQ.TH
External static pressure: 35Pa High
Middle
31
SPL(dB)
28
Low 24
LINE
<50/60Hz>
NOTCH
NOISE CRITERION CURVES
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound
may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level
can be higher by about 2 dB than the displayed level during cooling and heating operation.

8
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD35VAQ.TH
External static pressure: 15Pa High
Middle
33
SPL(dB)
28
Low 23
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD35VAQ.TH
External static pressure: 5Pa High
Middle
33
SPL(dB)
28
Low 23
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD35VAQ.TH
External static pressure: 50Pa High
Middle
35
SPL(dB)
31
Low 25
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD35VAQ.TH
External static pressure: 35Pa High
Middle
34
SPL(dB)
29
Low 24
LINE
<50/60Hz>
NOTCH
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound
may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level
can be higher by about 2 dB than the displayed level during cooling and heating operation.

9
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD50VAQ.TH
External static pressure: 15Pa High
Middle
37
SPL(dB)
34
Low 30
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD50VAQ.TH
External static pressure: 5Pa High
Middle
36
SPL(dB)
33
Low 29
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD50VAQ.TH
External static pressure: 50Pa High
Middle
39
SPL(dB)
36
Low 32
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD50VAQ.TH
External static pressure: 35Pa High
Middle
38
SPL(dB)
35
Low 31
LINE
<50/60Hz>
NOTCH
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound
may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level
can be higher by about 2 dB than the displayed level during cooling and heating operation.

10
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD60VAQ.TH
External static pressure: 15Pa High
Middle
38
SPL(dB)
34
Low 30
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD60VAQ.TH
External static pressure: 5Pa High
Middle
37
SPL(dB)
33
Low 29
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD60VAQ.TH
External static pressure: 50Pa High
Middle
39
SPL(dB)
36
Low 32
LINE
<50/60Hz>
NOTCH
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, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SEZ-KD60VAQ.TH
External static pressure: 35Pa High
Middle
39
SPL(dB)
35
Low 31
LINE
<50/60Hz>
NOTCH
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound
may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level
can be higher by about 2 dB than the displayed level during cooling and heating operation.