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.

11
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-KD71VAQ.TH
External static pressure: 15Pa High
Middle
40
SPL(dB)
35
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-KD71VAQ.TH
External static pressure: 5Pa High
Middle
39
SPL(dB)
34
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-KD71VAQ.TH
External static pressure: 50Pa High
Middle
42
SPL(dB)
37
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-KD71VAQ.TH
External static pressure: 35Pa High
Middle
41
SPL(dB)
36
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 condi-
tion by surrounding echoes. The sound level can be higher
by about 2 dB than the displayed level during cooling and
heating operation.
Measurement location
2m 1m
Aux. duct
1.5m
test unit

12
INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW
SEZ-KD25VAQ
(External static pressure 15Pa) 220-240V 50/60Hz
External static pressure (Pa)
0
10
20
30
40
50
Airflow rate(m3/min)
45678910
Middle
Low
High
Limit
Rated point
0
40
30
20
10
45678910
Airflow rate(m3/min)
External static pressure (Pa)
SEZ-KD25VAQ
(External static pressure 5Pa) 220-240V 50/60Hz
Middle
Low
High
Rated point
Limit
0
10
20
30
40
50
60
70
80
45678910
Airflow rate(m3/min)
External static pressure (Pa)
SEZ-KD25VAQ
(External static pressure 50Pa) 220-240V 50/60Hz
Middle
Low
High
Limit
Rated point
0
10
20
30
40
50
60
70
80
45678910
Airflow rate(m3/min)
External static pressure (Pa)
SEZ-KD25VAQ
(External static pressure 35Pa) 220-240V 50/60Hz
Middle
Low
High
Limit
Rated point

13
External static pressure (Pa)
SEZ-KD35VAQ
(External static pressure 15Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
0
10
20
30
40
50
6789101112
Middle
Low
High
Limit
Rated point
0
40
30
20
10
External static pressure (Pa)
6789101112
Airflow rate(m3/min)
SEZ-KD35VAQ
(External static pressure 5Pa) 220-240V 50/60Hz
Middle
Low
High
Limit
Rated point
0
20
10
30
40
50
60
70
80
External static pressure (Pa)
Airflow rate(m3/min)
SEZ-KD35VAQ
(External static pressure 50Pa) 220-240V 50/60Hz
6789101112
Middle
Low
High
Limit
Rated point
0
20
10
30
40
50
60
70
80
External static pressure (Pa)
SEZ-KD35VAQ
(External static pressure 35Pa) 220-240V 50/60Hz
6789101112
Airflow rate(m3/min)
Middle
Low
High
Limit
Rated point

14
External static pressure (Pa)
SEZ-KD50VAQ
(External static pressure 15Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
891011 12 13 14 15 16
0
50
40
30
20
10
High
Limit
Rated point
Middle
Low
External static pressure (Pa)
SEZ-KD50VAQ
(External static pressure 5Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
0
40
30
20
10
891011 12 13 14 15 16
Middle
Low
High
Limit
Rated point
External static pressure (Pa)
SEZ-KD50VAQ
(External static pressure 50Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
891011 12 13 14 15 16
0
10
20
30
40
50
60
70
80
Middle
Low
High
Limit
Rated point
External static pressure (Pa)
SEZ-KD50VAQ
(External static pressure 35Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
891011 12 13 14 15 16
0
10
20
30
40
50
60
70
80
Middle
Low
High
Limit
Rated point

15
External static pressure (Pa)
SEZ-KD60VAQ
(External static pressure 15Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
910111213141516171819
0
50
40
30
20
10
Middle
Low
High
Limit
Rated point
External static pressure (Pa)
SEZ-KD60VAQ
(External static pressure 5Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
910111213141516171819
0
40
30
20
10 Middle
Low
High
Limit
Rated point
External static pressure (Pa)
SEZ-KD60VAQ
(External static pressure 50Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
910111213141516171819
0
10
20
30
40
60
70
50
80
Middle
Limit
Rated point
Low
High
External static pressure (Pa)
SEZ-KD60VAQ
(External static pressure 35Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
910111213141516171819
0
10
20
30
40
60
70
50
80
Middle
Limit
Rated point
Low
High

16
External static pressure (Pa)
SEZ-KD71VAQ
(External static pressure 15Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
0
50
40
30
20
10
11 12 13 14 15 16 17 18 19 20 21
Middle
High
Low
Limit
Rated point
External static pressure (Pa)
SEZ-KD71VAQ
(External static pressure 5Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
0
40
30
20
10
11 12 13 14 15 16 17 18 19 20 21
Middle
Low
High
Limit
Rated point
External static pressure (Pa)
SEZ-KD71VAQ
(External static pressure 50Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
2120191817161514131211
0
10
20
30
40
50
80
70
60
Middle
Low
High
Limit
Rated point
External static pressure (Pa)
SEZ-KD71VAQ
(External static pressure 35Pa) 220-240V 50/60Hz
Airflow rate(m3/min)
0
10
20
30
40
50
80
70
60
2120191817161514131211
Middle
Low
High
Limit
Rated point

17
OUTLINES AND DIMENSIONS
3
Unit : mm
24
20
16
900
700
500
9
7
5
1060
860
660
LJHK
{12.7
SEZ-KD71VAQ
SEZ-KD60VAQ
SEZ-KD50VAQ
SEZ-KD35VAQ
700 752 798 660 7 600 800
{15.88 {9.52
{6.35
{9.52
1198
998
AModel
SEZ-KD25VAQ
1152
952
B
1100
900
C
1060
860
D
11
9
E
1000
800
F
1200
1000
G
Air
outlet Air inlet
Terminal block
(Remote controller transmission line)
Drain pipe(O.D.{32)(Spontaneous draining)
1
Gas pipe
1Liquid pipe 2
Refrigerant piping
flare connection (gas)
2Refrigerant piping
flare connection (liquid)
Terminal block
(Indoor/outdoor connecting line)
Suspension bolt hole
4-14X30 Slot
Air filter
Control box
2XE-{2.9
2X2-{2.9
L-{2.9
Knockout hole {27
(Indoor/outdoor connecting line)
Knockout hole {27
(Remote controller transmission line)
10
170
57
More than 300
450
G
50
50~150
50
777
450
15
20
100
100X(E-1)=F
30
D (Duct)
625 (Suspension bolt pitch)
90 A
23 B (Suspension bolt pitch)
C
23 677
700
25100
23
150 (Duct)
116 70
270
102
More than 10mm
More than 20mm
25
49
10
88
100
100XJ=K 8812
12 37 100
20 157.5
20 H
200
37
Access door
Note2
Note1.Use M10 screw for the suspension bolt (field supply).
2.Keep the service space for the maintenance at the bottom.
3.This chart indicates for SEZ-KD50VAQ model,which has 3 fans.
SEZ-KD25,35VAQ models have 2 fans.
SEZ-KD60,71VAQ models have 4 fans.
4.In case an inlet duct is used,remove the air filter(supply with
the unit), then install the filter(field supply) at suction side.
Make the access door at the appointed position properly
for service maintenance.
Ceiling surface Access door
Required space for service and maintenance

18
4WIRING DIAGRAM
L1:ONLY
SEZ-KD71VAQ
INSIDE SECTION OF CONTROL BOX
CN22(BLUE)
LED1
CN3C(BLUE)
CNMF
SW2SW1 CN32
CN20(RED)CN44CN4F
CN41
SWE
ON OFF
CN51
FS TH2 TH5 TH1
TB15
CN4F
CN2L
LED3 LED2
I.B.
S1
TB4
S3
S2
TO
OUTDOOR
UNIT
FAN MOTOR
ARRESTER
CONNECTOR (EMERGENCY OPERATION)
INTAKE AIR TEMP. THERMISTOR
PIPE TEMP. THERMISTOR/LIQUID
COND. /EVA. TEMP. THERMISTOR
AC REACTOR (POWER FACTOR IMPROVEMENT)
FLOAT SWITCH
SWE
TH1
TH2
TH5
L1
FS
POWER SUPPLY (I.B.)
TRANSMISSION (INDOOR-OUTDOOR)
LED2
LED3
SWITCH (FOR MODE SELECTION)
SWITCH (FOR CAPACITY CODE)
TERMINAL BLOCK
(REMOTE CONTROLLER TRANSMISSION LINE)
TERMINAL BLOCK
(REMOTE CONTROLLER TRANSMISSION LINE)
TB15
CONNECTOR (REMOTE SWITCH)
CONNECTOR (LOSSNAY)
R.B.
I.B.
CN32
REMOTE CONTROLLER BOARD
INDOOR CONTROLLER BOARD
SW2
SW1
TB4 TERMINAL BLOCK
(INDOOR/OUTDOOR CONNECTING LINE)
SYMBOL EXPLANATION
CN2L
CONNECTOR (HA TERMINAL-A)
CN51
LED1
CN41
CONNECTOR (CENTRALLY CONTROL)
POWER SUPPLY (I.B.)
DSA
FUSE AC250V 6.3A
FUSE
TB6
X1 AUX. RELAY
VARISTOR
ZNR01,02
MS
3~
135
31
1456734
12
4231
1324
12
3
TB6
R.B.
1
2
X1
DC310~340V
RECTIFY CIRCUIT
U
U
FUSE
ZNR01
(BLACK)
CN01
CNP
ZNR02
(BLUE)
DSA
1
t˚t˚t˚
1
2
L1
DRAINPUMP
1~
M
NAMESYMBOL SYMBOL NAME
NOTE)1. Since the outdoor side electric wiring may change be sure to
check the outdoor unit electric wiring for servicing.
2. Indoor and outdoor connecting wires are made with polarities, make
wiring matching terminal numbers(S1,S2,S3).
3. Symbols used in wiring diagram above are,
:CONNECTOR
:TERMINAL
(HEAVY DOTTED LINE):FIELD WIRING
(THIN DOTTED LINE)
:OPTIONAL PARTS

19
REFRIGERANT SYSTEM DIAGRAM
5
Pipe temperature
thermistor/liquid
(TH2)
Distributor
Condenser/evaporator
temperature thermistor
(TH5)
Room temperature
thermistor (TH1)
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
#50
Strainer
#50
Heat exchanger
Refrigerant GAS pipe connection
(Flare)
Refrigerant LIQUID pipe connection
(Flare)

20
6TROUBLESHOOTING
6-1. CAUTIONS ON TROUBLESHOOTING
(1) Before troubleshooting, check the followings:
1Check the power supply voltage.
2Check the indoor/outdoor connecting wire for mis-wiring.
(2) Take care the followings during servicing.
1Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn
off the breaker.
2When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the
components.
3When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
Lead wires
˚C
˚C
SIMPLE
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
B
C
A
E D
6-2. SELF-CHECK FUNCTION
Wired remote controller
(1) Turn on the power.
(2) Press the [CHECK] button twice.
(3) Set refrigerant address with [TEMP] button
if system control is used.
(4) Press the [ON/OFF] button to stop the
self-check.
AACHECK button
BBRefrigerant address
CCTEMP button
DDIC : Indoor unit
OC : Outdoor unit
EECheck code
1 Check code Symptom Remark
P1 Intake sensor error
P2 Pipe (TH2) sensor error
P9 Pipe (TH5) sensor error
E6,E7 Indoor/outdoor unit communication error
P4 Drain sensor error
P5 Drain pump error
P6 Freezing/Overheating protection operation
EE Communication error between indoor and outdoor units
P8 Pipe temperature error
E0, E3~E5 Remote controller transmission error
E1, E2 Remote controller control board error
Fb Indoor unit control system error (memory error, etc.)
E9 Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
UP Compressor overcurrent interruption
U3,U4 Open/short of outdoor unit thermistors
UF Compressor overcurrent interruption (When compressor locked)
U2 Abnormal high discharging temperature/49C worked/insufficient refrigerant
U1,Ud Abnormal high pressure (63H worked)/Overheating protection operation
U5 Abnormal temperature of heat sink
U8 Outdoor unit fan safeguard stop
U6 Compressor overcurrent interruption/Abnormal of power module
U7 Abnormality of super heat due to low discharge temperature
U9,UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit
/Current sensor error
Others Other errors (Refer to the technical manual for the outdoor unit.)
For details, check the LED display
of the outdoor controller board.
As for outdoor unit, refer to
service manual OC322.
• On wired remote controller.
1Check code displayed in the LCD.
• For description of each check code, refer to the following table.