Mitsubishi SEZ-KD09NA User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Series SEZ
Model name
Model name <Indoor unit>
<Indoor unit>
SEZ-KD09NA(4) SEZ-KD12NA(4) SEZ-KD15NA(4) SEZ-KD18NA(4)
2012
INDOOR UNIT
TEMP.
ON/OFF
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
1
Air outlet duct flange
Air outlet
Air inlet
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
PART NAMES AND FUNCTIONS
Indoor Unit SEZ-KD09NA(4) SEZ-KD12NA(4) SEZ-KD15NA(4) SEZ-KD18NA(4)
Wired remote controller
Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
Operation buttons
2
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 re­mote controller has been prohib­ited 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 but­tons 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 corre­sponding timer is set.
Up/Down Air Direction indica­tor
The indicator shows the direc­tion 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 di­rection 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”
When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indication
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.
(For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappears then start the operation.
3
2
SPECIFICATIONS
Model Name Capacity
Power source Power input Current Temperature set range Remote controller Airflow direction Fan
Type x Quantity External static press Motor type Motor output Driving mechanism Airflow rate(Low-Mid-High) Airflow rate(Low-Mid-High)
Airflow rate(Low-Mid-High) External finish External dimension H x W x D Net weight Wiring
Refrigerant piping diameter
Drain piping diameter Sound level (Low-Mid-High) (measured in anechoic room) Insulation material Air filter Refrigerant control device Protection devices Heat exchanger Varistor Terminal block Power outlet A Standard attachment
Remark
Note
Min.size of wire Amperage of wire breaker Liquid Gas
Document Accessory
1.Cooling/Heating capacity indicates the maximum value at operation under the following condition.
<Cooling> Indoor:80˚FD.B. / 67˚FW.B. (26.7˚CD.B. / 19.4˚CW.B.) Outdoor:95˚FD.B. (35˚CD.B.) <Heating> Indoor:70
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
4. < > SEZ-KD NA only
R410A R410A
˚FD.B. (21.1˚CD.B.) Outdoor:47˚FD.B. / 43˚FW.B. (8.3˚CD.B. / 6.1˚CW.B.)
Pipe length:24-9/16ft (7.5m) Height difference:0ft (0m)
BTU/h
kW A
˚F(˚C)
in.WG(Pa)
kW
m3/min
CFM L/S
mm In. kg in.(mm) A in.(mm) in.(mm) in.(mm)
dB<A>
SEZ-KD09NA(4)
Cooling
8100
208/230V (60Hz)
0.06
0.51
67 to 86 (19 to 30)
0.02-0.06-0.14-0.20 (5-15-35-50)
7-7/8 x 31-1/8 x 27-9/16
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
Cross fin (Aluminum fin and copper tube)
To outdoor unit : 3P To wired remote controller : 2P
Installation Manual, Instruction Book
Drain hose (flexible joint), <Wired Remote Controller>
-
Sirocco fan x 2
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
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
-
Fuse (250V 6.3A)
ERZV10D471
10
Heating
10900
0.04
0.39
63 to 83 (17 to 28)
SEZ-KD12NA(4)
Cooling
11500
208/230V (60Hz)
0.07
0.57
67 to 86 (19 to 30)
0.02-0.06-0.14-0.20 (5-15-35-50)
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
Cross fin (Aluminum fin and copper tube)
To outdoor unit : 3P To wired remote controller : 2P
Installation Manual, Instruction Book
Drain hose (flexible joint), <Wired Remote Controller>
-
Sirocco fan x 2
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
-
Fuse (250V 6.3A)
ERZV10D471
10
Heating
13600
0.05
0.46
63 to 83 (17 to 28)
4
Model Name Capacity
Power source Power input Current Temperature set range Remote controller Airflow direction Fan
Type x Quantity External static press Motor type Motor output Driving mechanism Airflow rate(Low-Mid-High) Airflow rate(Low-Mid-High)
Airflow rate(Low-Mid-High) External finish External dimension
H x W x D Net weight Wiring
Refrigerant piping diameter
Drain piping diameter Sound level (Low-Mid-High) (measured in anechoic room) Insulation material Air filter Refrigerant control device Protection devices Heat exchanger Varistor Terminal block Power outlet A Standard attachment
Min.size of wire Amperage of wire breaker Liquid Gas
R410A R410A
Document Accessory
Remark
Note
1.Cooling/Heating capacity indicates the maximum value at operation under the following condition.
<Cooling> Indoor:80˚FD.B. / 67˚FW.B. (26.7˚CD.B. / 19.4˚CW.B.) Outdoor:95˚FD.B. (35˚CD.B.) <Heating> Indoor:70
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
4. < > SEZ-KD NA only
˚FD.B. (21.1˚CD.B.) Outdoor:47˚FD.B. / 43˚FW.B. (8.3˚CD.B. / 6.1˚CW.B.)
Pipe length:24-9/16ft (7.5m) Height difference:0ft (0m)
BTU/h
kW A
˚F(˚C)
in.WG(Pa)
kW
m3/min
CFM L/S
mm In. kg in.(mm) A in.(mm) in.(mm) in.(mm)
dB<A>
SEZ-KD15NA(4)
Cooling
14100
208/230V (60Hz)
0.09
0.74
67 to 86 (19 to 30)
0.02-0.06-0.14-0.20 (5-15-35-50)
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
Cross fin (Aluminum fin and copper tube)
To outdoor unit : 3P To wired remote controller : 2P
Installation Manual, Instruction Book
Drain hose (flexible joint), <Wired Remote Controller>
-
Sirocco fan x 3
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
-
Fuse (250V 6.3A)
ERZV10D471
20
Heating
18000
0.07
0.63
63 to 83 (17 to 28)
SEZ-KD18NA(4)
Cooling
17200
208/230V (60Hz)
0.09
0.74
67 to 86 (19 to 30)
0.02-0.06-0.14-0.20 (5-15-35-50)
7-7/8 x 46-7/8 x 27-9/16
Polystyrene foam, Polyethylene foam, Urethane foam
PP Honeycomb fabric (washable)
Cross fin (Aluminum fin and copper tube)
To outdoor unit : 3P To wired remote controller : 2P
Installation Manual, Instruction Book
Drain hose (flexible joint), <Wired Remote Controller>
-
Sirocco fan x 4
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
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
-
Fuse (250V 6.3A)
ERZV10D471
20
Heating
21600
0.07
0.63
63 to 83 (17 to 28)
5
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.
6
SEZ-KD12NA(4)
External static pressure:
0.02[in.WG](5Pa)
90
NOTCH
High
Middle
Low
SPL(dB)
33 28 23
<60Hz>
LINE
SEZ-KD12NA(4)
External static pressure:
0.06[in.WG](15Pa)
90
NOTCH
High
Middle
Low
SPL(dB)
33 28 23
<60Hz>
LINE
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
HEARING FOR CONTINUOUS NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
SEZ-KD12NA(4)
External static pressure:
0.14[in.WG](35Pa)
90
NOTCH
High
Middle
Low
SPL(dB)
34 29 24
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
<60Hz>
LINE
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
HEARING FOR CONTINUOUS NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
SEZ-KD12NA(4)
External static pressure:
0.20[in.WG](50Pa)
90
NOTCH
High
Middle
Low
SPL(dB)
35 31 25
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
<60Hz>
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF HEARING FOR CONTINUOUS NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF HEARING FOR CONTINUOUS NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
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.
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-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.
8
SEZ-KD18NA(4)
External static pressure:
0.02[in.WG](5Pa)
90
NOTCH
High
Middle
Low
SPL(dB)
37 33 29
<60Hz>
LINE
SEZ-KD18NA(4)
External static pressure:
0.06[in.WG](15Pa)
90
NOTCH
High
Middle
Low
SPL(dB)
38 34 30
<60Hz>
LINE
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
HEARING FOR CONTINUOUS NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
SEZ-KD18NA(4)
External static pressure:
0.14[in.WG](35Pa)
90
NOTCH
High
Middle
Low
SPL(dB)
39 35 31
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
<60Hz>
LINE
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
HEARING FOR CONTINUOUS NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
SEZ-KD18NA(4)
External static pressure:
0.20[in.WG](50Pa)
90
NOTCH
High
Middle
Low
SPL(dB)
39 36 32
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
<60Hz>
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF HEARING FOR CONTINUOUS NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF HEARING FOR CONTINUOUS NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
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
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(m
3
/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(m
3
/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(m
3
/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(m
3
/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(m
3
/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
10
SEZ-KD12NA(4)
(External static pressure 0.02[in.WG](5Pa)) 208/230V 60Hz
40
[0.16]
30
[0.12]
20
[0.08]
External static pressure [in.WG](Pa)
10
[0.04]
Low
0
6789101112
[212] [282][247] [353] [388][318] [424]
Middle
Airflow rate(m
3
/min)[CFM]
High
Rated point
Limit
SEZ-KD12NA(4)
(External static pressure 0.06[in.WG](15Pa)) 208/230V 60Hz
50
[0.20]
40
[0.16]
30
[0.12]
20
[0.08]
External static pressure [in.WG](Pa)
10
[0.04]
0
6789101112
[212] [282][247] [353] [388][318] [424]
Low
Middle
Airflow rate(m
3
/min)[CFM]
High
Rated point
Limit
SEZ-KD12NA(4)
(External static pressure 0.14[in.WG](35Pa)) 208/230V 60Hz
80
[0.32]
70
[0.28]
60
[0.24]
50
[0.20]
40
[0.16]
Middle
3
/min)[CFM]
Rated point
30
[0.12]
External static pressure [in.WG](Pa)
20
[0.08]
10
[0.04]
0
6789101112
[212] [282][247] [353] [388][318] [424]
Low
Airflow rate(m
Limit
High
SEZ-KD12NA(4)
(External static pressure 0.20[in.WG](50Pa)) 208/230V 60Hz
80
[0.32]
70
[0.28]
60
[0.24]
50
[0.20]
40
[0.16]
30
[0.12]
External static pressure [in.WG](Pa)
20
[0.08]
10
[0.04]
0
6789101112
[212] [282][247] [353] [388][318] [424]
Low
Airflow rate(m
Middle
3
Limit
Rated point
/min)[CFM]
High
11
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(m
3
/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(m
3
/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(m
3
/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(m
3
/min)[CFM]
[282] [318] [353] [388] [424] [494][459] [530] [565]
Middle
Low
High
Limit
Rated point
12
SEZ-KD18NA(4)
(External static pressure 0.02[in.WG](5Pa)) 208/230V 60Hz
40
[0.16]
Limit
30
[0.12]
20
[0.08]
External static pressure [in.WG](Pa)
10
[0.04]
Low
0
910111213141516171819
[318] [353] [388] [424] [494][459] [530] [565] [600] [671][636]
Middle
Airflow rate(m
High
3
/min)[CFM]
Rated point
SEZ-KD18NA(4)
(External static pressure 0.06[in.WG](15Pa)) 208/230V 60Hz
50
[0.20]
Limit
40
[0.16]
High
30
[0.12]
Middle
20
[0.08]
External static pressure [in.WG](Pa)
10
[0.04]
0
910111213141516171819
[318] [353] [388] [424] [494][459] [530] [565] [600] [671][636]
Low
Airflow rate(m
3
/min)[CFM]
Rated point
SEZ-KD18NA(4)
(External static pressure 0.14[in.WG](35Pa)) 208/230V 60Hz
80
[0.32]
70
[0.28]
60
[0.24]
50
[0.20]
40
[0.16]
30
[0.12]
External static pressure [in.WG](Pa)
20
[0.08]
10
[0.04]
0
910111213141516171819
[318] [353] [388] [424] [494][459] [530] [565] [600] [671][636]
Low
Middle
Airflow rate(m
3
/min)[CFM]
Limit
High
Rated point
SEZ-KD18NA(4)
(External static pressure 0.20[in.WG](50Pa)) 208/230V 60Hz
80
[0.32]
70
[0.28]
60
[0.24]
50
[0.20]
40
[0.16]
30
[0.12]
External static pressure [in.WG](Pa)
20
[0.08]
10
[0.04]
0
910111213141516171819
[318] [353] [388] [424] [494][459] [530] [565] [600] [671][636]
Low
Airflow rate(m
Limit
Middle
3
/min)[CFM]
High
Rated point
13
3
(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
9
800 1000 860
7
700
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
1100B1152
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
1
2
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)
G
450
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)
OUTLINES AND DIMENSIONS
SEZ-KD09NA(4) SEZ-KD12NA(4) SEZ-KD15NA(4) SEZ-KD18NA(4)
Unit : mm(in.)
14
21
1~
M
135
31
1456734
12
4231
12
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
°
4
WIRING DIAGRAM
SEZ-KD09NA SEZ-KD12NA SEZ-KD15NA SEZ-KD18NA
15
SEZ-KD09NA4
12
1~
M
ON OFF
SW6
DC294-340V
RECTIFY CIRCUIT
RU
SW1
BZ1
SW2
LED1
CN1
W.B.
RFI
R.B.
1
2
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
1
2
(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
SEZ-KD12NA4 SEZ-KD15NA4 SEZ-KD18NA4
16
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)
REFRIGERANT SYSTEM DIAGRAM
SEZ-KD09NA(4) SEZ-KD12NA(4) SEZ-KD15NA(4) SEZ-KD18NA(4)
17
6
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.
Ta ble.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 tem p.-4 .5
˚
F(2.5˚C)
Inlet ai r 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 tem p. 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
-
-
HEATER CONTROL
18
6-3. PAC-YU25HT (Optional Parts) installation
The following section describes installation of the External Heater Adapter that connects to SEZ-KD NA series indoor unit. This products is the special wiring parts to drive an electric heater with the air conditioner.
(1) Parts list
Check that the following parts are included in the package.
1) External output cable (with a yellow connector).............................2 in total
Tw o types of cables with different connectors are included.
2) Panel heater connector.................................................................. 3 in total
White: 1 Green: 2 (2 types)
(2) Connection to the indoor unit
Use the cables that fit the connectors on the indoor unit control board.
1) External output cable (with a yellow connector) This cable is used to connect a relay circuit for an interlocked operation with either an electric or a panel heater. Connect the cable to CN24 on the indoor unit control board.
2) Panel heater connector (with a white connector) This connector is used to perform an interlocked operation with a panel heater. Depending on the indoor unit control board specification, connect the cable to CN4Y as appropriate
<Image>
CN4Y for FAN control (PAC-YU25HT)
(3) Locally procured wiring
A basic connection method is shown below.
Remote control board Relay circuit
Electric Heater
power source
Electric Heater or panel heater
Preparations in the field
X
Indoor unit
Adapter
Red 1
X
White 2
White 1
(applicable only when a panel heater is connected)
Maximum cable length is 10 m (32ft)
3
control board
CN24
YellowWhite
CN4Y
19
For relay X, use the specifications given below. Rated voltage: 12VDC Power consumption: 0.9W or less * Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
The length of the electrical wiring for the PAC-YU25HT is 2 meters (6-1/2 ft.)
To extend this length, use sheathed 2-core cable. Control cable type: CVV, CVS, CPEV or equivalent. Cable size: 0.5 mm
2
~ 1.25 mm2 (16 to 22 AWG)
Don't extend the cable more than 10 meters (32ft)
(4) Wiring restrictions
Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters (32ft).
Longer than 10 meters (32ft) could cause improper operation.
Use a transit relay when extending wiring such as remote wiring.
Recommended circuit
Wiring diagram
1-phase power supply
208V, 230V/60Hz
Control board
FS1, 2 ----- Thermal fuse
H1, H2 ----- Heater
26H --------- Overheat
protection thermostat
88H --------- Electromagnetic contactor
FS1
FS2 FS1
FS2
R
S
R
S
CN24
H2
88H
H1
88H
26H
88H
20
7
Lead wires
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
B
C
A
E D F
ERROR 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.
1 Check code displayed in the LCD.
• For description of each check code, refer to the following table.
TROUBLESHOOTING
7-1. CAUTIONS ON TROUBLESHOOTING
(1) Before troubleshooting, check the followings:
1 Check the power supply voltage. 2 Check the indoor/outdoor connecting wire for mis-wiring.
(2) Take care the followings during servicing.
1 Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn
off the breaker.
2 When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the
components.
3 When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
7-2. 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.
AA
CHECK button
BB
Indoor Unit’s Refrigerant address
CC
TEMP button
DD
IC : Indoor unit OC : Outdoor unit
EE
Check code
FF
Indoor Unit No.
21
If the unit cannot be operated properly after the test run has been performed, refer to the following table to remove the cause.
Symptom
Cause
Wired remote controller LED 1, 2 (PCB in outdoor unit)
On the wireless remote controller with condition above, following phenomena take place.
• No signals from the remote controller are accepted.
• Operation lamp is blinking.
• The buzzer makes a short piping sound.
PLEASE WAIT
PLEASE WAIT → Error code
Display messages do not appear even when operation switch is turned ON (operation lamp does not light up).
For about 2 minutes after power-on
After about 2 minutes has expired after power-on
After LED 1, 2 are lighted, LED 2 is
turned off, then only LED 1 is
Only LED 1 is lighted.
LED 1, 2 blink.
Only LED 1 is lighted.
LED 1 blinks twice, LED 2 blinks once.
•For about 2 minutes after power-on,op­eration of the remote controller is not possible due to system start-up. (Correct operation)
•Connector for the outdoor unit’s protection device is not connected.
•Reverse or open phase wiring for the outdoor unit’s power terminal block (L1, L2, L3)
•Incorrect wiring between indoor and outdoor units (incorrect polarity of S1, S2, S3)
•Remote controller wire short
Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
LED1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is
always lit.
LED2 (power for remote controller)
Indicates whether power is supplied to the remote controller. This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant address “0”.
LED3 (communication between indoor and outdoor units)
Indicates state of communication between the indoor and outdoor units. Make sure that this LED is always blinking.
lighted.
(Correct operation)
22
• Refer to the installation manual that comes with each remote controller for details.
• If the unit cannot be operated properly after the test run has been performed, refer to the following table to remove the cause.
On the IR wireless remote controller with conditions above, following phenomena takes place.
• No signals from the remote controller are accepted.
• OPE lamp is blinking.
• The buzzer makes a short ping sound.
Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
PLEASE WAIT
PLEASE WAIT →Error code
Display messages do not appear even when operation switch is turned ON (operation lamp does not light up).
Symptom
After LED 1, 2 are lighted, LED 2 is turned off, then only LED 1 is lighted. (Correct operation)
Only LED 1 is lighted. → LED 1, 2 blink.
Only LED 1 is lighted. → LED 1, 2 blinks twice, LED 2 blinks once.
• For about 2 minutes after power-on, operation of the remote controller is not possible due to system start-up. (Correct operation)
• Connector for the outdoor unit’s protection device is not connected.
• Reverse or open phase wiring for the outdoor unit’s power terminal block (L1, L2, L3)
• Incorrect wiring between indoor and outdoor units (incorrect polarity of S1, S2, S3)
• Remote controller wire short
For about 2 minutes
following power-on
After about 2 min­utes has expired
following power-on
LED 1, 2 (PCB in outdoor unit)Wired remote controller
Cause
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit) Compressor overcurrent interruption Open/short of outdoor unit thermistors Compressor overcurrent interruption (When compressor locked) Abnormal high discharging temperature/49C worked/ insufficient refrigerant Abnormal high pressure (63H worked)/ Overheating safeguard operation Abnormal temperature of heat sink Outdoor unit fan protection stop Compressor overcurrent interruption/Abnormal of power module Abnormality of super heat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit/Current sensor error – – Other errors (Refer to the technical manual for the outdoor unit.)
For details, check the LED display of the outdoor controller board.
[Output pattern A] Errors detected by indoor unit
IR wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1 2 3 4 5 6 7 8
9 10 11 12
No sound
Wired remote controller
RF thermostat
Check code
P1 P2, P9 E6, E7 P4 P5 P6 EE P8 E4 – – Fb – –
IR wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1
2
3
4
5
6
7
8
9 10
11
12
Wired remote controller
RF thermostat
Check code
E9 UP U3, U4 UF U2 U1, Ud U5 U8 U6 U7
U9, UH
– 13 14
Others
Symptom
Intake sensor error Pipe (Liquid or 2-phase pipe) sensor error Indoor/outdoor unit communication error Drain sensor error Drain pump error Freezing/Overheating safeguard operation Communication error between indoor and outdoor units Pipe temperature error Remote controller signal receiving error – – Indoor unit control system error (memory error, etc.) No corresponding
Remark
*1 If the beeper does not sound again after the initial two beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not
come on, there are no error records.
*2 If the beeper sounds three times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm the self-check start signal was
received, the specified refrigerant address is incorrect.
• On IR wireless remote controller The continuous buzzer sounds from receiving section of indoor unit. Blink of operation lamp
• On wired remote controller Check code displayed on the LCD.
Symptom Remark
• RF thermostat is not established.
23
Indicates whether control power is supplied. Make sure that this LED is always lit.
Indicates whether power is supplied to the remote controller. This LED lights only in the case of
the indoor unit which is connected to the outdoor unit refrigerant address “0”.
Indicates state of communication between the indoor and outdoor units. Make sure that this LED is
always blinking.
LED 1 (power for microcomputer)
LED 2 (power for remote controller)
LED 3 (communication between indoor and outdoor units)
AUTO RESTART FUNCTION
Indoor controller board
This model is equipped with the AUTO RESTART FUNCTION. When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor controller board. The auto restart function sets to work the moment the power has restored after power failure, then, the unit will restart automatically. Set the AUTO RESTART FUNCTION using the wireless remote controller. (Mode no.1).
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
24
7-3. SELF-DIAGNOSIS ACTION TABLE
Error Code
P1
P2
Abnormal point and detection method
Room temperature thermistor (TH1)
1 The unit is in three-minute resume
prevention mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after three minutes. (The unit returns to normal operation, if it has normally reset.)
2 Constantly detected during cooling,
drying and heating operation Short: 90˚C[194˚F] or more Open: -40˚C[-40˚F] or less
Pipe temperature thermistor/Liquid (TH2)
1 The unit is in three-minute resume
prevention mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after three minutes. (The unit returns to normal operation, if it has normally reset.)
2 Constantly detected during cooling,
drying, and heating (except defrosting) operation. Short: 90˚C[194˚F] or more Open: -40˚C[-40˚F] or less
Note: Refer to the manual of outdoor unit for the details of display
such as F, U, and other E.
Cause
1 Defective thermistor
characteristics
2 Contact failure of connector
(CN20) on the indoor controller board (Insert failure)
3 Breaking of wire or contact
failure of thermistor wiring
4 Defective indoor controller
board
1 Defective thermistor
characteristics
2 Contact failure of connector
(CN44) on the indoor controller board (Insert failure)
3 Breaking of wire or contact
failure of thermistor wiring
4 Defective refrigerant circuit is
causing thermistor temperature of 90˚C[194˚F] or more or
-40˚C[-40˚F] or less.
5 Defective indoor controller board
Countermeasure
1–3 Check resistance value of thermistor.
:[32˚F].......15.0k"
0
10:[50˚F].....9.6k"
20:[68˚F].....6.3k"
30:[86˚F].....4.3k"
40:[104˚F]...3.0k" If you put force on (draw or bend) the lead wire with measuring resistance value of thermistor breaking of wire or contact failure can be detected.
2 Check contact failure of connector (CN20) on
the indoor controller board. Refer to 7-5. Tu rn the power on again and check restart after inserting connector again.
4 Check room temperature display on remote
controller. Replace indoor controller board if there is abnormal difference with actual room temperature.
Tu rn the power off, and on again to operate after check.
13 Check resistance value of thermistor. For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN44) on
the indoor controller board. Refer to 7-5. Turn the power on again and check restart after inserting connector again.
4 Check pipe <liquid> temperature with remote
controller in test run mode. If pipe <liquid> temperature is extremely low (in cooling mode) or high (in heating mode), refrigerant circuit may have defective.
5 Check pipe <liquid> temperature with remote
controller in test run mode. If there is extreme difference with actual pipe <liquid> temperature, replace indoor controller board.
P4
(5701)
P5
Contact failure of drain float switch (CN4F)
1 Extract when the connector of drain float
switch is disconnected. (3 and 4 of connector CN4F is not short-circuited.)
2 Constantly detected during operation.
Drain overflow protection operation
1 Suspensive abnormality, if drain float
switch is detected to be underwater for 1 minute and 30 seconds continuously with drain pump on. Tu rn off compressor and indoor fan.
2 Drain pump is abnormal if the condition
above is detected during suspensive abnormality.
3 Constantly detected during drain pump
operation.
1 Contact failure of connector
(Insert failure)
2 Defective indoor controller
board
1 Malfunction of drain pump 2 Defective drain
Clogged drain pump Clogged drain pipe
3 Defective drain float switch
Catch of drain float switch or malfunction of moving parts cause drain float switch to be detected under water (Switch On)
4 Defective indoor-controller
board
Tu rn the power off, and on again to operate after check.
1 Check contact failure of float switch connec-
tor. Tu rn the power on again and check after inserting connector again.
2 Operate with connector (CN4F) short-circuited.
Replace indoor controller board if abnormali­ty reappears.
1 Check if drain-up machine works. 2 Check drain function.
3 Remove drain float switch connector CN4F
and check if it is short (Switch On) with the moving part of float switch UP, or OPEN with the moving part of float switch down. Replace float switch if it is short with the moving part of float switch down.
4 Replace indoor controller board if it is shor t-
circuited between switch connector CN4F and abnormality reappears.
It is not abnormal if there is no problem about the above-mentioned
Tu rn the power off, and on again to operate after check.
3-4 of the drain float
1~4
25
Error Code
P6
Abnormal point and detection method
Freezing/overheating protection is working
1 Freezing protection (Cooling mode)
The unit is in six-minute resume prevention mode if pipe <liquid or condenser/evap­orator> temperature stays under
:[5˚F] for three minutes after the
-15 compressor started. Abnormal if it stays under -15 within 16 minutes after six-minute resume prevention mode.
2 Overheating protection (Heating mode)
The units is in six-minute resume prevention mode if pipe <Liquid or con­denser / evaporator> temperature is detected as over 70 compressor started. Abnormal if the temperature of over 70 detected again within 10 minutes after six-minute resume prevention mode.
:[5˚F] for three minutes again
:[158˚F] after the
:[158˚F] is
Cause
(Cooling or drying mode)
1 Clogged filter (reduced airflow) 2 Shor t cycle of air path 3 Low-load (low temperature)
operation beyond the tolerance range
4 Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is defective.
5 Defective outdoor fan control 6 Overcharge of refrigerant 7 Defective refrigerant circuit
(clogs)
(Heating mode)
1 Clogged filter (reduced airflow) 2 Short cycle of air path 3 Over-load (high temperature)
operation beyond the tolerance range
4 Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is defective.
Countermeasure
(Cooling or drying mode)
1 Check clogging of the filter. 2 Remove shields.
4 Refer to 7-7. DC Fan motor (FAN MOTOR/
INDOOR CONTROLLER BOARD)
5 Check outdoor fan motor. 67 Check operating condition of refrigerant
circuit.
(Heating mode)
1 Check clogs of the filter. 2 Remove shields.
4 Refer to 7-7. DC Fan motor (FAN MOTOR/
INDOOR CONTROLLER BOARD)
P8
Pipe temperature
<Cooling mode> Detected as abnormal when the pipe tem­perature is not in the cooling range 3 min­utes after compressor start and 6 minutes after the liquid or condenser/evaporator pipe is out of cooling range. Note 1) It takes at least 9 minutes. to
detect.
Note 2) Abnormality P8 is not detected in
drying mode.
Cooling range :
-3 deg˚C(-5.4deg˚F) ] (TH-TH1)
TH: Lower temperature between: liquid
pipe temperature (TH2) and con­denser/evaporator temperature (TH5)
TH1: Intake temperature
<Heating mode> When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished, the unit is detected as abnormal when condenser/evaporator pipe temperature is not in heating range within 20 minutes.
Note 3) It takes at least 27 minutes to
detect abnormality.
Note 4) It excludes the period of defrosting
(Detection restarts when defrost­ing mode is over)
Heating range :
3 deg˚C(5.4deg˚F) [ (TH5-TH1)
5 Defective outdoor fan control 6 Overcharge of refrigerant 7 Defective refrigerant circuit
(clogs)
8 Bypass circuit of outdoor unit
is defective.
1 Slight temperature difference
between indoor room temperature and pipe <liquid or condenser / evaporator> temperature thermistor
• Shortage of refrigerant
• Disconnected holder of pipe <liquid or condenser /
evaporator> thermistor
• Defective refrigerant circuit
2 Converse connection of
extension pipe (on plural units connection)
3 Converse wiring of indoor/
outdoor unit connecting wire (on plural units connection)
4 Defective detection of indoor
room temperature and pipe <condenser / evaporator> temperature thermistor
5 Stop valve is not opened
completely.
5 Check outdoor fan motor. 6~8Check operating condition of refrigerant
circuit.
1~4 Check pipe <liquid or condenser /
evaporator> temperature with room temperature display on remote controller and outdoor controller circuit board. Pipe <liquid or condenser / evaporator> temperature display is indicated by setting SW2 of outdoor controller circuit board as follows.
Conduct temperature check with outdoor controller circuit board after connecting
(
‘A-Control Service Tool(PAC-SK52ST)’.
23Check converse connection of extension
pipe or converse wiring of indoor/outdoor unit connecting wire.
)
26
Error Code
P9
Abnormal point and detection method
Abnormality of pipe temperature ther­mistor / Condenser-Evaporator (TH5)
1 The unit is in three-minute resume pro-
tection mode if short/open of thermistor is detected. Abnormal if the unit does not get back to normal within three min­utes. (The unit returns to normal opera­tion, if it has normally reset.)
2 Constantly detected during cooling, dry-
ing, and heating operation (except defrosting) Short: 90˚C[194˚F] or more Open: -40˚C[-40˚F] or less
Cause
1 Defective thermistor
characteristics
2 Contact failure of connector
(CN44) on the indoor controller board (Insert failure)
3 Breaking of wire or contact
failure of thermistor wiring
4 Temperature of thermistor is
90:[194˚F] or more or
-40˚C[-40˚F] or less caused by defective refrigerant circuit.
5 Defective indoor controller
board
Countermeasure
13 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN44)
on the indoor controller board. Refer to 7-5. Tu rn the power on and check restart after inserting connector again.
4 Operate in test run mode and check pipe
<condenser / evaporator> temperature. If pipe <condenser / evaporator> tempera­ture is extremely low (in cooling mode) or high (in heating mode), refrigerant circuit may have defect.
5 When no problems are found in 1-4 above,
replace the indoor unit control board.
Remote controller transmission error(E0)/signal receiving error(E4)
1 Abnormal if main or sub remote con-
troller can not receive normally any transmission from indoor unit of refriger­ant address “0” for three minutes. (Error code : E0)
2 Abnormal if sub remote controller could
not receive for any signal for two min­utes. (Error code: E0)
1 Abnormal if indoor controller board can
E0
or
E4
E3
or
E5
not receive normally any data from remote controller board or from other indoor controller board for three minutes. (Error code: E4)
2 Indoor controller board cannot receive
any signal from remote controller for two minutes. (Error code: E4)
Remote controller transmission error(E3)/signal receiving error(E5)
1 Abnormal if remote controller could not
find blank of transmission path for six seconds and could not transmit.
(Error code: E3)
2 Remote controller receives transmitted
data at the same time, compares the data, and when detecting it, judges different data to be abnormal 30 continuous times. (Error code: E3)
1 Abnormal if indoor controller board could
not find blank of transmission path.
(Error code: E5)
2 Indoor controller board receives trans-
mitted data at the same time, compares the data,and when detecting it, judges different data to be abnormal 30 continuous times. (Error code: E5)
1 Contact failure at transmission
wire of remote controller
2 All remote controllers are set
as “sub” remote controller. In this case, E0 is displayed on remote controller, and E4 is displayed at LED (LED1, LED2) on the outdoor controller circuit board.
3 Mis-wiring of remote controller 4 Defective transmitting receiving
circuit of remote controller
5 Defective transmitting receiving
circuit of indoor controller board of refrigerant address “0”
6 Noise has entered into the
transmission wire of remote controller.
1 Tw o remote controller are set
as “main.”
(In case of 2 remote con-
trollers)
2 Remote controller is connected
with two indoor units or more.
3 Repetition of refrigerant
address
4 Defective transmitting receiving
circuit of remote controller
5 Defective transmitting receiving
circuit of indoor controller board
6 Noise has entered into trans-
mission wire of remote con­troller.
1 Check disconnection or looseness of indoor
unit or transmission wire of remote controller.
2 Set one of the remote controllers “main” if
there is no problem with the action above.
3 Check wiring of remote controller.
•Total wiring length: max.500m (Do not use cable 3 or more)
•The number of connecting indoor units: max.16units
•The number of connecting remote con­troller: max.2units
When it is not the above-mentioned problem of
1~3 4
Diagnose remote controllers.
a) When “RC OK” is displayed,
Remote controllers have no problem. Tu rn the power off, and on again to check. If abnormality generates again, replace indoor controller board.
b) When “RC NG” is displayed,
Replace remote controller. c) When “RC E3” is displayed, d) When “ERC 00-06” is displayed, [ c),d)
Noise may be causing abnormality. ]
If the unit is not normal after replacing
indoor controller board in group control, indoor controller board of address “0” may be abnormal.
1 Set a remote controller to main, and the
other to sub.
2 Remote controller is connected with only one
indoor unit.
3 The address changes to a separate setting.
4~6 Diagnose remote controller.
a) When “RC OK”is displayed, remote con-
trollers have no problem.
Tu rn the power off,and on again to check. When becoming abnormal again, replace
indoor controller board. b)When “RC NG”is displayed, replace
remote controller. c)When “RC E3”or “ERC 00-66”is displayed,
noise may be causing abnormality.
27
Error Code
E6
E7
Fb
E1
or
E2
Abnormal point and detection method
Indoor/outdoor unit communication error (Signal receiving error)
1 Abnormal if indoor controller board
cannot receive any signal normally for six minutes after turning the power on.
2 Abnormal if indoor controller board
cannot receive any signal normally for three minutes.
3 Consider the unit as abnormal under the
following condition: When two or more indoor units are connected to an outdoor unit, indoor controller board cannot receive a signal for three minutes from outdoor controller circuit board, a signal which allows outdoor controller circuit board to transmit signals.
Indoor/outdoor unit communication error (Transmitting error)
Abnormal if “1” receiving is detected 30 times continuously though indoor controller board has transmitted “0”.
Indoor controller board
Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board.
Remote controller control board
1 Abnormal if data cannot be read normal-
ly from the nonvolatile memory of the remote controller control board.
(Error code: E1)
2 Abnormal if the clock function of remote
controller cannot be operated normally.
(Error code: E2)
Cause
1 Contact failure, short circuit or,
mis-wiring (converse wiring) of indoor/outdoor unit connecting wire
2 Defective transmitting receiving
circuit of indoor controller board
3 Defective transmitting receiving
circuit of indoor controller board
4 Noise has entered into indoor/
outdoor unit connecting wire.
1 Defective transmitting receiving
circuit of indoor controller board
2 Noise has entered into power
supply.
3 Noise has entered into outdoor
control wire.
1 Defective indoor controller
board
1 Defective remote controller 1 Replace remote controller.
Check LED display on the outdoor control cir-
cuit board. (Connect A-control service tool, PA C-SK52ST.) Refer to Outdoor manual.
1 Check disconnection or looseness of indoor/
outdoor unit connecting wire of indoor unit or outdoor unit. Check all the units in case of twin triple indoor unit system.
2-4 Tu rn the power off, and on again to check.
If abnormality generates again, replace indoor controller board or outdoor controller circuit board.
Other indoor controller board may have
defect in case of twin triple indoor unit system.
1-3 Tu rn the power off, and on again to check.
If abnormality generates again, replace indoor controller board.
1 Replace indoor controller board.
Countermeasure
PA
(2500)
Water leakage
This detection is performed during the operation (stop, heating, fan, or error stop mode etc.) other than cooling and dry. 1 When a) and b) are found, water leakage
occurs. a) Pipe <liquid> temperature - inlet tem-
perature < -10˚C[14˚F] for 30 minutes
b) When drain float switch is detected to
be soaked in the water for 15 minutes or more.
* When drain float switch is detected to
be NOT soaked in the water, each counting of a) and b) is cleared.
*When this error is detected, the error will not be reset until the main power is reset.
1 Mis-piping of extension pipes
(When connected with multiple units)
2 Mis-wiring of indoor/outdoor
unit connecting wire (When connected with multiple units)
3 Detection failure of the indoor
unit inlet/ pipe <liquid> ther­mistor
4 Drain pump failure
5 Drainage failure
· Clogged drain pump
· Clogged drain pipe
6 Drain float switch failure
· Drain float switch is detected to be soaked in the water (ON status) due to the operation failure of the moving parts.
· Contact failure of drain float switch connector (Loose connector)
1Check the extension pipes for mis-piping.
2Check the Indoor/outdoor unit connecting
wire for mis-wiring.
3Check room temperature display on remote
controller and indoor pipe <liquid> tempera­ture. (Refer to the countermeasure on P2.)
4Check if drain-up machine works.
5 Check drain function.
6Check drain float switch. (Refer to the coun-
termeasure on P4 and P5.)
28
7-4. TROUBLESHOOTING BY INFERIOR PHENOMENA
Note: Refer to the manual of outdoor unit for the detail of remote
controller.
Phenomena
(1)LED2 on indoor controller board
is off.
• When LED1 on indoor controller board is also off.
1 Power supply of rated voltage is not supplied to out-
door unit.
2 Defective outdoor controller circuit board
3 Power supply of 208~230V is not supplied to indoor
unit.
4 Defective indoor controller board
Cause
Countermeasure
1 Check the voltage of outdoor power
supply terminal block (L, N) or (L3, N).
• When AC 208~230V is not detected. Check the power wiring to outdoor unit and the breaker.
• When AC 208~230V is detected.
—Check 2 (below).
2 Check the voltage between outdoor
terminal block S1 and S2.
• When AC 208~230V is not detected.
Check the fuse on outdoor controller circuit board.
Check the wiring connection.
• When AC 208~230V is detected.
—Check 3 (below).
3 Check the voltage between indoor terminal
block S1 and S2.
• When AC 208~230V is not detected. Check indoor/outdoor unit connecting wire for mis-wiring.
• When AC 208~230V is detected.
—Check 4 (below).
4 Check the fuse on indoor controller board.
Check the wiring connection. If no problem are found, indoor controller board is defective.
(2)LED2 on indoor controller board
is blinking.
• When LED1 on indoor controller board is also blinking. Connection failure of indoor/outdoor unit connecting wire
• When LED1 is lit.
1 Mis-wiring of remote controller wires
Under twin triple indoor unit system, 2 or more indoor units are wired together.
2 Refrigerant address for outdoor unit is wrong or not
set.
Under grouping control system, there are some units whose refrigerant address is 0.
3 Short-cut of remote controller wires 4 Defective remote controller
Check indoor/outdoor unit connecting wire for connection failure.
1 Check the connection of remote con-
troller wires in case of twin triple indoor unit system. When 2 or more indoor units are wired in one refrigerant system, connect remote controller wires to one of those units.
2 Check the setting of refrigerant address
in case of grouping control system. If there are some units whose refrigerant addresses are 0 in one group, set one of the units to 0 using SW1 (3-6) on outdoor controller circuit board.
34 Remove remote controller wires and
check LED2 on indoor controller board.
• When LED2 is blinking, check the short-cut of remote controller wires.
• When LED2 is lit, connect remote controller wires again and:
if LED2 is blinking, remote controller is defective; if LED2 is lit, connection failure of remote controller terminal block etc. has returned to normal.
29
7-5. TEST POINT DIAGRAM
CN01 Power supply voltage (208 - 230VAC)
SWE Emergency operation
SW1 Model selection
SW2 Capacity setting
CN32 Remote start/stop adapter
CN24 Heater control (12VDC)
CN22 For MA remote controller cable con-
nection (10 - 13 VDC (Between 1 and 3.))
CN51 Centralized control
CN41 JAMA standard HA terminal A
CN44 Thermistor
(liquid/condenser/evaporator temperature)
CN4F Float thermistor
CN20 Thermistor (Inlet temperature)
CN3C Indoor-outdoor transmission
(0 - 24VDC)
CNMF Fan motor output
1 - 4: 294 - 340 VDC 5 - 4: 15 VDC 6 - 4: 0 - 6.5 VDC 7 - 4: Stop 0 or 15 VDC Run 7.5 VDC
(0 - 15 pulse)
CNP Drain-up mechanism output (200VAC)
CN2L LOSSNAY
CN4Y For Fan control
CN90 Wireless remote controller
(*1)
V
FG
Voltage on the (-) side of PC672 and C955 (Same with the voltage between 7 (+) and 4 (-) of CNMF)
V
CC
Voltage between the C955 pins 15 VDC (Same with the voltage between 5 (+) and 4 (-) of CNMF)
V
sp Voltage between the C626 pins
0VDC (with the fan stopped) 1 - 6.5VDC (with the fan in operation) (Same with the voltage between 6 (+) and 4 (-) of CNMF)
CN3C
CNP
Fuse(6.3A 250V)
CNMF
CN20
CN44
CN90
CN4F
LED1
LED2
LED3
CN4Y
SWE
CN2L
C626
PC672
SW2
CN41
CN22
SW1
CN32
CN24
CN51
CN01
C955
7-5-1. Indoor controller board
SEZ-KD09NA SEZ-KD12NA SEZ-KD15NA SEZ-KD18NA
30
SEZ-KD09NA4
CN01 Power supply voltage (208 - 230VAC)
SWE Emergency operation
SW1 Model selection
SW2 Capacity setting
CN105 Radio frequency interface
CN32 Remote start/stop adapter
CN24 Heater control (12VDC)
CN22 For MA remote controller cable con-
nection (10 - 13 VDC (Between 1 and 3.))
CN51 Centralized control
CN41 JAMA standard HA terminal A
CN44 Thermistor
(liquid/condenser/evaporator temperature)
CN4F Float thermistor
CN20 Thermistor (Inlet temperature)
CN3C Indoor-outdoor transmission
(0 - 24VDC)
CNMF Fan motor output
1 - 4: 294 - 340 VDC 5 - 4: 15 VDC 6 - 4: 0 - 6.5 VDC 7 - 4: Stop 0 or 15 VDC Run 7.5 VDC
(0 - 15 pulse)
CNP Drain-up mechanism output (200VAC)
CN2L LOSSNAY
CN4Y For Fan control
CN90 Wireless remote controller
(*1)
V
FG
Voltage on the (-) side of PC672 and C955 (Same with the voltage between 7 (+) and 4 (-) of CNMF)
V
CC
Voltage between the C955 pins 15 VDC (Same with the voltage between 5 (+) and 4 (-) of CNMF)
V
sp Voltage between the C626 pins
0VDC (with the fan stopped) 1 - 6.5VDC (with the fan in operation) (Same with the voltage between 6 (+) and 4 (-) of CNMF)
CN3C
CNP
Fuse(6.3A 250V)
CNMF
CN20
CN44
CN90
CN4F
LED1
LED2
LED3
CN4Y
CN105
SWE
CN2L
C626
PC672
SW2
CN41
CN22
SW1
CN32
CN24
CN51
CN01
C955
SEZ-KD12NA4 SEZ-KD15NA4 SEZ-KD18NA4
31
7-6. TROUBLE CRITERION OF MAIN PARTS
Room temperature thermistor (TH1)
Condenser/evaporator temperature thermistor (TH5)
Measure the resistance with a tester. (Part temperature 10°C(50°F) ~ 30°C(86°F))
Pipe temperature thermistor/liquid (TH2)
Wiring diagram
Check method and criterion
Part name
Normal
8k~20k
Abnormal
Opened or short-circuited
Motor
Board with build-in motor
Current detecting resistor
Regulator Hall IC
Motor winding
Powe r
device
Pre
driver
Vm (Power supply for motor)
Vcc (Power supply for control)
Vsp (Speed command voltage)
PG (Pulse output for rotation)
GND
SEZ-KD09NA(4) SEZ-KD12NA(4) SEZ-KD15NA(4) SEZ-KD18NA(4)
32
7-7. DC FAN MOTOR (FAN MOTOR/ INDOOR CONTROLLER BOARD)
Notes
· High voltage is applied to the connecter (CNMF) for the fan motor. Give attention to the service.
· Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller circuit
board and fan motor.)
Self check Symptom : The indoor fan cannot turn around.
No
NG
NG
Wiring contact check
Contact of fan motor connector (CNMF)
Check the fuse (FUSE) on indoor controller board.
Power supply check (Remove the connector (CNMF))
Measure the voltage in the indoor controller circuit
board.
TEST POINT
1 :VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC294~340V
TEST POINT 2 :VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC15V
Wiring recovery
Replace drain pump (DP).
Replace indoor controller board.
Replace the fan motor.
Replace indoor controller board (I.B). Replace fan motor (MF).
Replace indoor
controller board.
Replace the fan motor.
Is the voltage normal?
Is there no contact failure?
Ye s
1
2
Ye s
No
Did the fuse blow?
Check the drain pump (DP) Is the resistance between terminals normal?
No
Ye s
Ye s
No
Check the operation of fan. END
Ye s
OK
Check the operation. END
OK
Check method of DC fan motor (fan motor / indoor controller circuit board)
33
(A)
(B),(C)
DISASSEMBLY PROCEDURE8
SEZ-KD09NA(4) SEZ-KD12NA(4) SEZ-KD15NA(4) SEZ-KD18NA(4)
1. Control box
1. Removing the control box cover (1) Remove the two fixing screws on the cover (A)
to remove it.
Exercise caution when removing heavy parts.
Fig. 1
2. Thermistor (Intake air)
1. Remove the control box cover according to the procedure in section [1].
(1) Pull out the thermistor holder (B) and thermis-
tor (C) on the control box.
Fig. 2
Fig. 3
34
3. Drainpan
(D) (E)
(a)
(a)
(a)
(a)
(a) Tab
Insulation material
(E)
1. Removing the filter and the bottom plate (1) Push up the tab on the filter, and pull out the
filter in the direction of the arrow 1.
(2) Remove the fixing screws on the bottom plate
(D), (E) to remove it.
2. Removing the drainpan (1) Pull out the drain pan in the direction of the
arrow 1.
Exercise caution when removing heavy parts.
Fig. 4
Note
• Drain the water out of the drain pan before removing it.
• To avoid dew condensation, use insulated screws in the places marked with circles in Fig. 6.
Fig. 5
Fig. 6
35
4. Thermistor (Condenser / evaporator)
(F)
(G),(H)
(Liquid pipe)
1. Remove the drain pan according to the proce­dure in section [3].
2. Removing the Heat exchanger cover
(1) Remove the four fixing screws on the heat
exchanger cover (F) to remove it.
3. Removing the thermistor
(1) Remove the thermistor (G) from the thermistor
holder (H) on the copper tube.
Thermistor size Liquid pipe: ø3/8inch(ø8mm) Condenser / evaporator: ø1/4inch(ø6mm)
Exercise caution when removing heavy parts.
Fig. 7
Fig. 8
36
(a)
(a) Tab
5. Fan and fan motor
(J)
(a)
(a) Tab
(a)
(a)
(a)
1. Removing the filter and the bottom plate (1) Push down the tab on the filter, and pull out
the filter in the direction of the arrow 1.
(2) Remove the fixing screws on the bottom plate
(J) to remove it.
2. Removing the fan casing (bottom half) (1) Squeeze the tabs on the fan casing to remove
it in the direction of arrow 2.
Exercise caution when removing heavy parts.
Fig. 9
3. Removing the motor cable (1) Remove the motor cable threw the rubber
bush.
4. Removing the fan motor and the Sirocco fan (1) Remove the two motor fixing screws to
remove the motor and the Sirocco fan in the direction of arrow 3.
(2) Remove the four fan case fixing screws to
take the top half of the fan casing off.
Fig. 10
Fig. 11
Fig. 12
37
(K)
6. Bearing [KD15·18NA(4) model only]
(L)
(M)
1. Removing the bearing
(1) Remove the two fixing screws on the bearing
cover (K) to remove it.
(2) Remove the two bearing retainer screws to
remove the bearing.
Exercise caution when removing heavy parts.
Fig. 13
Fig. 14
7. Heat exchanger
1. Remove the drain pan according to the proce­dure in section [3].
2. Remove the heat exchanger cover according to the procedure in section [4] 2.
3. Removing the cover
(1) Remove the two fixing screws on the cover (L)
to remove it.
4. Removing the Heat exchanger
(1) Remove the fixing screws on the heat
exchanger (M) to remove it.
Fig. 15
Fig. 16
38
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New publication effective Apr. 2012
Specifications subject to change without notice
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