Mitsubishi Electric Mr. SLim SEZ-KD09NA Operating manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Model name
<Indoor unit>
Model name
<Indoor unit>
SEZ-KD09NA(4)
SEZ-KD12NA(4)
SEZ-KD15NA(4)
SEZ-KD18NA(4)
Series SEZ
2012
INDOOR UNIT
WIRED REMOTE CONTROLLER
ON/OFF
TEMP.

CONTENTS
1. PART NAMES AND FUNCTIONS ···········································································2
2. SPECIFICATIONS ···································································································4
3. OUTLINES AND DIMENSIONS·············································································14
4. WIRING DIAGRAM ································································································15
5. REFRIGERANT SYSTEM DIAGRAM····································································17
6. HEATER CONTROL ······························································································18
7. TROUBLESHOOTING ···························································································21
8. DISASSEMBLY PROCEDURE··············································································34

2
1PART NAMES AND FUNCTIONS
Indoor Unit
SEZ-KD09NA(4)
SEZ-KD12NA(4)
SEZ-KD15NA(4)
SEZ-KD18NA(4)
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
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
HWE0802B.qx 4/19/12 3:52 PM Page 2

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 (The 12 hour clock or The 24
hour clock), 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.
HWE0802B.qx 4/19/12 3:52 PM Page 3

4
2SPECIFICATIONS
BTU/h
kW
A
˚F(˚C)
Fan
in.WG(Pa)
kW
m3/min
CFM
L/S
mm
In.
kg
in.(mm)
A
Liquid in.(mm)
Gas in.(mm)
in.(mm)
dB<A>
Net weight
R410A
Motor output
Airflow rate(Low-Mid-High)
Airflow rate(Low-Mid-High)
Airflow rate(Low-Mid-High)
Motor type
External finish
Wiring
Capacity
Model Name
Power source
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:80˚FD.B. / 67˚FW.B. (26.7˚CD.B. / 19.4˚CW.B.) Outdoor:95˚FD.B. (35˚CD.B.)
Insulation material
Air filter
Refrigerant control device
Protection devices
Note
Pipe length:24-9/16ft (7.5m) Height difference:0ft (0m)
2.Power consumption. Run current at 0.06[in.WG] (15Pa) (external static pressure)
3.Cooling capacity value at 1:1system
Heating capacity value at 1:1system
<Heating> Indoor:70˚FD.B. (21.1˚CD.B.) Outdoor:47˚FD.B. / 43˚FW.B. (8.3˚CD.B. / 6.1˚CW.B.)
1.Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Refrigerant
piping diameter R410A
Sound level (Low-Mid-High)
(measured in anechoic room)
Heat exchanger
Terminal block
Power outlet A
Accessory
Min.size of wire
Amperage of wire breaker
Cooling
8100
0.06
0.51
67 to 86 (19 to 30)
Heating
10900
0.04
0.39
63 to 83 (17 to 28)
208/230V (60Hz)
-
Sirocco fan x 2
0.02-0.06-0.14-0.20 (5-15-35-50)
DC brushless motor
0.096
Direct-driven
5.5-7.0-9.0
194-247-317
91-116-150
Galvanized
200 x 790 x 700
7-7/8 x 31-1/8 x 27-9/16
18
1/8 (1.6)
15
ø1/4 (ø6.35) Flare
ø3/8 (ø9.52) Flare
O.D. 1-1/4 (32)
23-26-30
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
-
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), <Wired Remote Controller>
SEZ-KD09NA(4)
Cooling
11500
0.07
0.57
67 to 86 (19 to 30)
Heating
13600
0.05
0.46
63 to 83 (17 to 28)
208/230V (60Hz)
-
Sirocco fan x 2
0.02-0.06-0.14-0.20 (5-15-35-50)
DC brushless motor
0.096
Direct-driven
7.0-9.0-11.0
247-317-388
116-150-183
Galvanized
200 x 990 x 700
7-7/8 x 39 x 27-9/16
21
1/8 (1.6)
15
ø1/4 (ø6.35) Flare
ø3/8 (ø9.52) Flare
O.D. 1-1/4 (32)
23-28-33
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
-
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), <Wired Remote Controller>
SEZ-KD12NA(4)
4. < > SEZ-KD NA only
HWE0802B.qx 4/19/12 3:52 PM Page 4

5
3.Cooling capacity value at 1:1system
Heating capacity value at 1:1system
BTU/h
kW
A
˚F(˚C)
Fan
in.WG(Pa)
kW
m3/min
CFM
L/S
mm
In.
kg
in.(mm)
A
Liquid in.(mm)
Gas in.(mm)
in.(mm)
dB<A>
Net weight
R410A
Motor output
Airflow rate(Low-Mid-High)
Airflow rate(Low-Mid-High)
Airflow rate(Low-Mid-High)
Motor type
External finish
Wiring
Capacity
Model Name
Power source
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:80˚FD.B. / 67˚FW.B. (26.7˚CD.B. / 19.4˚CW.B.) Outdoor:95˚FD.B. (35˚CD.B.)
Insulation material
Air filter
Refrigerant control device
Protection devices
Note
Pipe length:24-9/16ft (7.5m) Height difference:0ft (0m)
2.Power consumption. Run current at 0.06[in.WG] (15Pa) (external static pressure)
<Heating> Indoor:70˚FD.B. (21.1˚CD.B.) Outdoor:47˚FD.B. / 43˚FW.B. (8.3˚CD.B. / 6.1˚CW.B.)
1.Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Refrigerant
piping diameter R410A
Sound level (Low-Mid-High)
(measured in anechoic room)
Heat exchanger
Terminal block
Power outlet A
Accessory
Min.size of wire
Amperage of wire breaker
Cooling
14100
0.09
0.74
67 to 86 (19 to 30)
Heating
18000
0.07
0.63
63 to 83 (17 to 28)
208/230V (60Hz)
-
Sirocco fan x 3
0.02-0.06-0.14-0.20 (5-15-35-50)
DC brushless motor
0.096
Direct-driven
10.0-12.5-15.0
353-441-529
167-208-250
Galvanized
200 x 990 x 700
7-7/8 x 39 x 27-9/16
23
1/8 (1.6)
15
ø1/4 (ø6.35) Flare
ø1/2 (ø12.7) Flare
O.D. 1-1/4 (32)
30-34-37
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
-
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), <Wired Remote Controller>
SEZ-KD15NA(4)
Cooling
17200
0.09
0.74
67 to 86 (19 to 30)
Heating
21600
0.07
0.63
63 to 83 (17 to 28)
208/230V (60Hz)
-
Sirocco fan x 4
0.02-0.06-0.14-0.20 (5-15-35-50)
DC brushless motor
0.096
Direct-driven
12.0-15.0-18.0
423-529-635
200-250-300
Galvanized
200 x 1190 x 700
7-7/8 x 46-7/8 x 27-9/16
27
1/8 (1.6)
15
ø1/4 (ø6.35) Flare
ø1/2 (ø12.7) Flare
O.D. 1-1/4 (32)
30-34-38
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
-
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), <Wired Remote Controller>
SEZ-KD18NA(4)
4. < > SEZ-KD NA only
HWE0802B.qx 4/19/12 3:52 PM Page 5

6
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-KD09NA(4)
External static pressure:
0.06[in.WG](15Pa)
High
Middle
30
SPL(dB)
26
Low 23
LINE
<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-KD09NA(4)
External static pressure:
0.02[in.WG](5Pa)
High
Middle
29
SPL(dB)
25
Low 22
LINE
<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-KD09NA(4)
External static pressure:
0.20[in.WG](50Pa)
High
Middle
33
SPL(dB)
29
Low 25
LINE
<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-KD09NA(4)
External static pressure:
0.14[in.WG](35Pa)
High
Middle
31
SPL(dB)
28
Low 24
LINE
<60Hz>
NOTCH
SOUND 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.
HWE0802B.qx 4/19/12 3:52 PM Page 6

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-KD12NA(4)
External static pressure:
0.06[in.WG](15Pa)
High
Middle
33
SPL(dB)
28
Low 23
LINE
<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-KD12NA(4)
External static pressure:
0.02[in.WG](5Pa)
High
Middle
33
SPL(dB)
28
Low 23
LINE
<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-KD12NA(4)
External static pressure:
0.20[in.WG](50Pa)
High
Middle
35
SPL(dB)
31
Low 25
LINE
<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-KD12NA(4)
External static pressure:
0.14[in.WG](35Pa)
High
Middle
34
SPL(dB)
29
Low 24
LINE
<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.
HWE0802B.qx 4/19/12 3:52 PM Page 7

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-KD15NA(4)
External static pressure:
0.06[in.WG](15Pa)
High
Middle
37
SPL(dB)
34
Low 30
LINE
<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-KD15NA(4)
External static pressure:
0.02[in.WG](5Pa)
High
Middle
36
SPL(dB)
33
Low 29
LINE
<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-KD15NA(4)
External static pressure:
0.20[in.WG](50Pa)
High
Middle
39
SPL(dB)
36
Low 32
LINE
<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-KD15NA(4)
External static pressure:
0.14[in.WG](35Pa)
High
Middle
38
SPL(dB)
35
Low 31
LINE
<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.
HWE0802B.qx 4/19/12 3:52 PM Page 8

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-KD18NA(4)
External static pressure:
0.06[in.WG](15Pa)
High
Middle
38
SPL(dB)
34
Low 30
LINE
<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-KD18NA(4)
External static pressure:
0.02[in.WG](5Pa)
High
Middle
37
SPL(dB)
33
Low 29
LINE
<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-KD18NA(4)
External static pressure:
0.20[in.WG](50Pa)
High
Middle
39
SPL(dB)
36
Low 32
LINE
<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-KD18NA(4)
External static pressure:
0.14[in.WG](35Pa)
High
Middle
39
SPL(dB)
35
Low 31
LINE
<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.
HWE0802B.qx 4/19/12 3:52 PM Page 9

10
INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW
SEZ-KD09NA(4)
(External static pressure 0.06[in.WG](15Pa)) 208/230V 60Hz
0
10
20
30
40
50
45678910
Airflow rate(m3/min)[CFM]
[141] [176] [212] [247] [282] [318] [353]
External static pressure [in.WG](Pa)
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
Middle
Low
High
Limit
Rated point
0
40
30
20
10
45678910
Airflow rate(m3/min)[CFM]
External static pressure [in.WG](Pa)
SEZ-KD09NA(4)
(External static pressure 0.02[in.WG](5Pa)) 208/230V 60Hz
Middle
Low
High
Rated point
Limit
[0.16]
[0.12]
[0.08]
[0.04]
[141] [176] [212] [247] [282] [318] [353]
45678910
Airflow rate(m3/min)[CFM]
[141] [176] [212] [247] [282] [318] [353]
0
10
20
30
40
50
60
70
80
External static pressure [in.WG](Pa)
SEZ-KD09NA(4)
(External static pressure 0.20[in.WG](50Pa)) 208/230V 60Hz
45678910
Airflow rate(m3/min)[CFM]
[141] [176] [212] [247] [282] [318] [353]
Middle
Low
High
Limit
Rated point
[0.32]
[0.28]
[0.24]
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
0
10
20
30
40
50
60
70
80
SEZ-KD09NA(4)
(External static pressure 0.14[in.WG](35Pa)) 208/230V 60Hz
45678910
Airflow rate(m3/min)[CFM]
[141] [176] [212] [247] [282] [318] [353]
External static pressure [in.WG](Pa)
[0.32]
[0.28]
[0.24]
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
Middle
Low
High
Limit
Rated point
HWE0802B.qx 4/19/12 3:52 PM Page 10

11
SEZ-KD12NA(4)
(External static pressure 0.06[in.WG](15Pa)) 208/230V 60Hz
6789101112
0
10
20
30
40
50
External static pressure [in.WG](Pa)
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
Airflow rate(m3/min)[CFM]
[212] [282][247] [353] [388][318] [424]
Middle
Low
High
Limit
Rated point
6789101112
SEZ-KD12NA(4)
(External static pressure 0.02[in.WG](5Pa)) 208/230V 60Hz
0
40
30
20
10
External static pressure [in.WG](Pa)
[0.16]
[0.12]
[0.08]
[0.04]
Airflow rate(m3/min)[CFM]
[212] [282][247] [353] [388][318] [424]
Middle
Low
High
Limit
Rated point
0
20
10
30
40
50
60
70
80
SEZ-KD12NA(4)
(External static pressure 0.20[in.WG](50Pa)) 208/230V 60Hz
6789101112
External static pressure [in.WG](Pa)
[0.32]
[0.28]
[0.24]
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
Airflow rate(m3/min)[CFM]
[212] [282][247] [353] [388][318] [424]
Middle
Low
High
Limit
Rated point
0
20
10
30
40
50
60
70
80
SEZ-KD12NA(4)
(External static pressure 0.14[in.WG](35Pa)) 208/230V 60Hz
6789101112
External static pressure [in.WG](Pa)
[0.32]
[0.28]
[0.24]
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
Airflow rate(m3/min)[CFM]
[212] [282][247] [353] [388][318] [424]
Middle
Low
High
Limit
Rated point
HWE0802B.qx 4/19/12 3:52 PM Page 11

12
SEZ-KD15NA(4)
(External static pressure 0.06[in.WG](15Pa)) 208/230V 60Hz
891011 12 13 14 15 16
0
10
20
30
40
50
External static pressure [in.WG](Pa)
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
Airflow rate(m3/min)[CFM]
[282] [318] [353] [388] [424] [494][459] [530] [565]
High
Limit
Rated point
Middle
Low
SEZ-KD15NA(4)
(External static pressure 0.02[in.WG](5Pa)) 208/230V 60Hz
Airflow rate(m3/min)[CFM]
891011 12 13 14 15 16
0
40
30
20
10
External static pressure [in.WG](Pa)
[0.16]
[0.12]
[0.08]
[0.04]
[282] [318] [353] [388] [424] [494][459] [530] [565]
Middle
Low
High
Limit
Rated point
SEZ-KD15NA(4)
(External static pressure 0.20[in.WG](50Pa)) 208/230V 60Hz
891011 12 13 14 15 16
0
10
20
30
40
50
60
70
80
External static pressure [in.WG](Pa)
[0.32]
[0.28]
[0.24]
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
Airflow rate(m3/min)[CFM]
[282] [318] [353] [388] [424] [494][459] [530] [565]
Middle
Low
High
Limit
Rated point
SEZ-KD15NA(4)
(External static pressure 0.14[in.WG](35Pa)) 208/230V 60Hz
891011 12 13 14 15 16
0
10
20
30
40
50
60
70
80
External static pressure [in.WG](Pa)
[0.32]
[0.28]
[0.24]
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
Airflow rate(m3/min)[CFM]
[282] [318] [353] [388] [424] [494][459] [530] [565]
Middle
Low
High
Limit
Rated point
HWE0802B.qx 4/19/12 3:52 PM Page 12

13
SEZ-KD18NA(4)
(External static pressure 0.06[in.WG](15Pa)) 208/230V 60Hz
910111213141516171819
0
10
20
30
40
50
External static pressure [in.WG](Pa)
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
[318] [353] [388] [424] [494][459] [530] [565] [600] [671][636]
Middle
Low
High
Limit
Rated point
Airflow rate(m3/min)[CFM]
SEZ-KD18NA(4)
(External static pressure 0.02[in.WG](5Pa)) 208/230V 60Hz
Airflow rate(m3/min)[CFM]
910111213141516171819
0
40
30
20
10
External static pressure [in.WG](Pa)
[0.16]
[0.12]
[0.08]
[0.04]
[318] [353] [388] [424] [494][459] [530] [565] [600] [671][636]
Middle
Low
High
Limit
Rated point
SEZ-KD18NA(4)
(External static pressure 0.20[in.WG](50Pa)) 208/230V 60Hz
910111213141516171819
0
10
20
30
40
60
70
50
80
External static pressure [in.WG](Pa)
[0.32]
[0.28]
[0.24]
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
[318] [353] [388] [424] [494][459] [530] [565] [600] [671][636]
Middle
Limit
Rated point
Low
High
Airflow rate(m3/min)[CFM]
SEZ-KD18NA(4)
(External static pressure 0.14[in.WG](35Pa)) 208/230V 60Hz
910111213141516171819
0
10
20
30
40
60
70
50
80
External static pressure [in.WG](Pa)
[0.32]
[0.28]
[0.24]
[0.20]
[0.16]
[0.12]
[0.08]
[0.04]
[318] [353] [388] [424] [494][459] [530] [565] [600] [671][636]
Airflow rate(m3/min)[CFM]
Middle
Limit
Rated point
Low
High
HWE0802B.qx 4/19/12 3:52 PM Page 13

14
OUTLINES AND DIMENSIONS
3
Unit : mm(in.)
SEZ-KD09NA(4)
SEZ-KD12NA(4)
SEZ-KD15NA(4)
SEZ-KD18NA(4)
(46-7/8)
1190
(39)
990
(31-1/8)
790
N
(48-25/32)
1239
(40-29/32)
1039
(33-1/16)
839
M
Drain pipe(O.D.ø32(1-1/4))
Terminal block (Remote controller transmission line)
Terminal block (Indoor/outdoor connecting line)
2
Refrigerant piping
flare connection (liquid)
ø12.7(1/2)
mm(in.)
(35-7/16)
(27-9/16)
(19-11/16)
(41-3/4)
(33-7/8)
(26)
(47-1/4)
(39-3/8)
(31-1/2)
(39-3/8)
(31-1/2)
(23-5/8)
(41-3/4)
(33-7/8)
(26)
(47-3/16)
(39-5/16)
(31-7/16)
(45-3/8)
(37-1/2)
(29-5/8)
(43-5/16)
(35-7/16)
(27-9/16)
700
Drain pipe(O.D.ø32(1-1/4))
(Emergency draining)
ø6.35(1/4)
ø9.52(3/8)
SEZ-KD15NA(4)
900 952 998 860 9800 1000 860 7700 20
24
16
L
900
500
K
9
5
J
1060
660
H
800600
7
660798752
Knockout hole ø27(1-3/32)
(Remote controller transmission line)
Knockout hole ø27(1-3/32)
(Indoor/outdoor connecting line)
G
1200
F
1000
E
11
D
1060
C
1100
B
1152
SEZ-KD09NA(4)
SEZ-KD12NA(4)
SEZ-KD18NA(4)
Model A
1198
Gas pipe Liquid pipe
L-ø2.9(1/8)
2X2-ø2.9(1/8)
2XE-ø2.9(1/8)
Control box
Air filter
Suspension bolt hole
4-14X30(9/16X1-3/16) Slot
Refrigerant piping
flare connection (gas)
1
12
Drain pipe(O.D.ø32(1-1/4))
(Spontaneous draining)
Air
inlet
Air
outlet
N
M
175±5(6-29/32±7/32)
Less than 300
Less than 550
(11-13/16)
(21-21/32)
More than 20
More than 10
57(2-1/4)
57(2-1/4)
(1-31/32 ~ 5-29/32)
(30-19/32)
(17-23/32)
(11-13/16)
(17-23/32)
More than 300
(13/16)
(13/32)
(3-9/16)
(5-29/32)
(2-25/32)(4-19/32)
70
10(13/32)
(3-15/16)
(1-15/16) (24-5/8)
450
37(1-15/32)
200(7-7/8)
H
157.5(6-7/32)20(13/16)
100(3-15/16)
37(1-15/32)
12(1/2)
12(1/2)
88(3-15/32)
100(3-15/16)XJ=K
100(3-15/16)
88(3-15/32)
777
50(1-31/32)
50 ~ 150
50(1-31/32)
G450
10(13/32)
49
25(1)
170(6-23/32)
102(4-1/32)
116
100 25(1)
23(29/32)
C
B (Suspension bolt pitch)23(29/32)
A
90
D (Duct)
100(3-15/16)X(E-1)=F
100(3-15/16)
15(19/32)
Drain hose (I.D.ø32(1-1/4))
<accessory>
(Actual length)
Note2
Access door
Required space for service and maintenance
Access door
Ceiling surface
Make the access door at the appointed position properly
for service maintenance.
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-KD15NA(4) model, which has 3 fans.
SEZ-KD09,12NA(4) models have 2 fans.
SEZ-KD18NA(4) 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.
159(6-9/32)
345(13-19/32)
20(13/16) 30(1-3/16)
23(29/32)
270(10-21/32)
20(13/16)
625(Suspension bolt pitch)
700(27-9/16)
677(26-21/32)
150(Duct)
HWE0802B.qx 4/19/12 3:52 PM Page 14

15
4WIRING DIAGRAM
SEZ-KD09NA
SEZ-KD12NA
SEZ-KD15NA
SEZ-KD18NA
21
1~
M
135
31
1456734
12
423112
3
TB15 TB4
PARTS LOCATION
I . B.
CONTROL BOX
Drainpump
(Yellow)
CN24
LED1
INSIDE SECTION OF CONTROL BOX
CN22
(Red)
LED1
CN3C
CNMF
SW2SW1
CN90
CN32
CN20CN44CN4F
CN41
SWE
ON OFF
CN51
(Blue)
TO MA REMOTE
CONTROLLER
FS TH2 TH5 TH1 Fan motor
TB15
CN2L (Blue)
LED3 LED2
I. B.
S1
TB4
S3
S2
TO
OUTDOOR
UNIT
CONNECTOR (BACK-UP HEATING)CN24
CN90 CONNECTOR (WIRELESS)
TB4
LED2
LED3
LED1 POWER SUPPLY (I.B.)
TRANSMISSION (INDOOR-OUTDOOR)
POWER SUPPLY (I.B.)
FS FLOAT SWITCH
TB15
ZNR01,02 VARISTOR
AUX. RELAYX1
FUSE FUSE AC250V 6.3A
DSA
CONNECTOR (CENTRALLY CONTROL)
CN41
CN51
CONNECTOR (HA TERMINAL-A)
CN2L
NAME
SYMBOL EXPLANATION
SW1
SW2
INDOOR CONTROLLER BOARD
CN32
I. B.
SYMBOL SYMBOL NAME
CONNECTOR (LOSSNAY)
CONNECTOR (REMOTE SWITCH)
SWE
ARRESTER
SWITCH (FOR MODEL SELECTION)
SWITCH (FOR CAPACITY CODE)
CONNECTOR (EMERGENCY OPERATION)
TH1 INTAKE AIR TEMP. THERMISTOR
TH2 PIPE TEMP. THERMISTOR/LIQUID
TH5 COND./EVA. TEMP. THERMISTOR
TERMINAL BLOCK
(REMOTE CONTROLLER TRANSMISSION LINE)
TERMINAL BLOCK
(INDOOR/OUTDOOR CONNECTING LINE)
Note1.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.
4.Use copper supply wire.
X1
DC310~340V
Rectify circuit
U
U
FUSE
ZNR01
(Black)
CN01
CNP
ZNR02
(Blue)
DSA
1
M
1
2
t°t°t°
HWE0802B.qx 4/19/12 3:52 PM Page 15

16
SEZ-KD09NA4
SEZ-KD12NA4
SEZ-KD15NA4
SEZ-KD18NA4
12
1~
M
ON
OFF
SW6
DC294-340V
RECTIFY CIRCUIT
RU
SW1
BZ1
SW2
LED1
CN1
W.B.
RFI
R.B.
12
X1
FUSE
DRAINPUMP
135
(BLACK)
CN01
CNP
INSIDE SECTION OF CONTROL BOX
(BLUE)
CN22
31
1
LED1
CN3C
SW2SW1 CN32
CN30(GREEN)
(RED)
CN20
CN41
SWE
ON OFF
CN51
(BLUE)
1474
59
95
2
12
41
FS TH2 TH5 TH1
FAN MOTOR
TB15
12
(RED)
CN105
(RED)
CN4F
(WHITE)
CN90
(WHITE)
CN44
(WHITE)
CNMF
(WHITE)
12
CN2L
TB6
(BLUE)
LED3
3
LED2
I. B.
S1
TB4
S3
S2
1
1
1
19
TRANSMISSION
WIRES DC 12V
-
+
MS
3~
SW2
SWITCH (HEATING ON/OFF)
SWITCH (COOLING ON/OFF)
SW1
RECEIVING UNIT RU
LED (RUN INDICATOR) LED1
BUZZER BZ1
IR WIRELESS REMOTE CONTROLLER BOARD
COND./EVA. TEMP. THERMISTOR TH5
PIPE TEMP. THERMISTOR/LIQUID TH2
INTAKE AIR TEMP. THERMISTOR TH1
CONNECTOR (EMERGENCY OPERATION)
SWITCH (FOR CAPACITY CODE)
SWITCH (FOR MODEL SELECTION)
SWITCH (FOR EMERGENCY OPERATION))
SWE
CONNECTOR (REMOTE SWITCH)
CONNECTOR (LLC)
CONNECTOR (LOSSNAY)
CONNECTOR (BACK-UP HEATING)
NAME NAMESYMBOL SYMBOLSYMBOL
I.B. I.B.
W.B.
OPTIONAL PARTS
R.B.
CN32
CN30
INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD
SW2
SW1
SW6
SYMBOL EXPLANATION
NAME
CN2L
CN24
CONNECTOR (HA TERMINAL-A)
CN51
CN90
CN105
CN41
CONNECTOR (CENTRALLY CONTROL)
CONNECTOR (WIRELESS)
CONNECTOR
(RADIO FREQUENCY INTERFACE)
FUSE AC250V 6.3A FUSE
X1
AUX. RELAY
TB15
FLOAT SWITCH
RADIO FREQUENCY INTERFACE FOR RF THERMOSTAT
FS
RFI
REMOTE CONTROLLER BOARD
POWER SUPPLY (I.B.)
TERMINAL BLOCK
(REMOTE CONTROLLER TRANSMISSION LINE)
TERMINAL BLOCK
(INDOOR/OUTDOOR CONNECTING LINE)
TERMINAL BLOCK
(REMOTE CONTROLLER TRANSMISSION LINE)
TRANSMISSION (INDOOR-OUTDOOR)
POWER SUPPLY (I.B.)
LED1
TB6
LED3
LED2
TB4
Note1. 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 matchingterminal numbers (S1,S2,S3).
3. Symbols used in wiring diagram above are as follows.
:CONNECTOR
:TERMINAL
(HEAVY DOTTED LINE):FIELD WIRING
(THIN DOTTED LINE):OPTIONAL PARTS
4. Use copper supply wire.
TO OUTDOOR
UNIT
(YELLOW)
CN24
TB15 TB4
PARTS LOCATION
I . B.
CONTROL BOX
HWE0802B.qx 4/19/12 3:52 PM Page 16

17
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)
SEZ-KD09NA(4)
SEZ-KD12NA(4)
SEZ-KD15NA(4)
SEZ-KD18NA(4)
HWE0802B.qx 4/19/12 3:52 PM Page 17

18
6HEATER CONTROL
6-1. Control specifications and Function setting
Table 1 shows how the field-installed heater is controlled. Select the desired pattern in the table below, and set the
Function on the indoor units as shown in Table 1.
Table.1 [Function table]
Select unit numbers 01 to 03 or all units (AL[wired remote controller] / 07[wireless remote controller])
*Refer to the Installation Manual for function settings.
Mode Setting Mode no. Setting
Initial setting
Heater control
23 1
23 2 -
Heater OFF
Inlet air temp. set temp.
Heater ON
Inlet air temp. < set temp.-4.5˚F(2.5˚C)
The fan will stop and the heater will turn off when
[DEFROST] or [ERROR] is displayed.
The fan will drive and the heater will turn on when
[DEFROST] or [ERROR] is displayed.
Set temp.
Set temp.-1.8
˚ F(1 ˚C )
Set temp.-4.5
˚ F(2.5 ˚C )
Inlet air temp.
Heater output OFF
ON
Heater OFF
Inlet air temp. set temp.
Heater ON
Inlet air temp. < set temp.-1.8˚F(2.5˚C)
Set temp.
Set temp.-1.8
˚ F(2.5 ˚C )
Inlet air tem p.
Heater output OFF
ON
6-2. Fan control
*Refer to the Installation Manual for function settings.
By setting the Mode No. 23 in the Function Table in section 6-1 and using CN4Y on the optional parts PAC-YU25HT, the
following patterns of fan control will become possible when [DEFROST] or [ERROR] is displayed.
Fan control patterns when [DEFROST] or [ERROR] is displayed
*1 Fan speed setting
* If a heater is installed in the duct, do not use CN4Y. By doing so, the fan will turn off when the heater is on,
which may result in fire.
Heater is installed in the duct. No heater is installed in the duct.
Use of CN4Y (PAC-YU25HT)
Heater is off.
Heater is on.
Unused*
Fan ON*1
Fan ON*1
Fan OFF
Fan OFF
Used
Setting Mode no. Setting
Mode
Fan control
Very low
Heating Thermo-OFF [DEFROST] or [ERROR]
STOP
Remote controller setting
Remote controller setting
Remote controller setting
Very low 25
25
25
1
2
3
Initial setting
-
-
HWE0802B.qx 4/19/12 3:52 PM Page 18