Mitsubishi Electric Mr.Slim SLZ-KA09NA Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. PART NAMES AND FUNCTIONS....... 2
2. SPECIFICATIONS ............................... 5
3. OUTLINES AND DIMENSIONS........... 7
4. WIRING DIAGRAM.............................. 9
5. REFRIGERANT SYSTEM DIAGRAM
..... 10
6. TROUBLESHOOTING....................... 11
7. SPECIAL FUNCTION ........................ 23
8. 4-WAY AIR FLOW SYSTEM.............. 26
9. DISASSEMBLY PROCEDURE.......... 28
November 2010
No. OCH487
REMOTE CONTROLLER
(Option)
Indoor unit
[Model names] [Service Ref.]
SLZ-KA09NA SLZ-KA09NA.TH
SLZ-KA12NA SLZ-KA12NA.TH
SLZ-KA15NA SLZ-KA15NA.TH
INDOOR UNIT
Model name
indication
ON/OFF
TEMP.
Note:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
• For servicing RoHS compli-
ant products, refer to the
RoHS Parts List.
PARTS CATALOG (OCB487)
9700058

2
1PART NAMES AND FUNCTIONS
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grille
Filter
Removes dust and pollutants
from inhaled air.
Horizontal Air Outlet
Sets horizontal airflow automatically
during cooling or dehumidifying.
Air Intake
Intakes air from room.
Indoor Unit
SLZ-KA09NA.TH SLZ-KA12NA.TH SLZ-KA15NA.TH
Radio frequency interface RF thermostat Wired remote controller
Remote controller (Optional parts)
ON/OFF
TEMP.

33
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
Temperature setting 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
cover
ON/OFF button
Fan Speed button
Filter button
(<Enter> button)
Test Run button
Check button (Clear button)
Airflow Up/Down button
Louver button
( Operation button)
To return operation
number
Ventilation button
( Operation button)
To go to next operation
number
Built-in temperature sensor
Wired remote controller (Option)
Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
SLZ-KA09NA.TH SLZ-KA12NA.TH SLZ-KA15NA.TH

4
Wired remote controller (Option)
●
●
°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
Note:
“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.
Display Section
For purposes of this explanation,
all parts of the display are shown.
During actual operation, only
the relevant items will be lit.
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is available.
“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohib-
ited by a master controller.
“Timer is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.
“Sensor” indication
Displays when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
To be displayed 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
Shows the direction of the
outcoming airflow.
“One Hour Only” indicator
Room Temperature display
Shows the room temperature. The room
temperature display range is 46~102°F.
The display blinks if the temperature
is less than
46°F or 102°F or more.
Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.
(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.
Displays if the airflow is set to
low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in one hour,
when the airflow direction also
changes.

55
SPECIFICATIONS
2
2-1. Operating range
(1) Power supply
Rated voltage Guaranteed voltage (V)
Indoor unit
208/230 V
1 phase
60 Hz
(2) Operation
Mode Condition
Intake air temperature (°F)
Indoor Outdoor
DB WB DB WB
Cooling
Standard temperature 80 67 95 —
Maximum temperature 95 71 115 —
Minimum temperature 67 57 14 —
Maximum humidity 78% —
Heating
Standard temperature 70 60 47 43
Maximum temperature 80 67 75 65
Minimum temperature 70 60 -4 -5
2-2. Outlet air speed and coverage
Model Function Airflow
(CFM)
Air speed
(ft./s.)
Coverage
(ft.)
SLZ-KA09NA Dry 350 11.2 12.1
Wet 320 10.2 11.1
SLZ-KA12NA Dry 390 12.1 13.5
Wet 350 10.9 12.1
SLZ-KA15NA Dry 390 12.1 13.5
Wet 350 10.9 12.1
Indoor model SLZ-KA09NA SLZ-KA12NA SLZ-KA15NA
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay)/Disconnect switch A15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.23 0.28 0.28
Airflow
(Low - Med. - High)
Dry CFM 280-320-350 280-320-390 280-320-390
Wet CFM 250-290-320 250-290-350 250-290-350
Moisture removal pt/h 1.2 2.3 4.5
Sound pressure level (Low - Med. - High) dB(A) 29-32-38 30-34-39 31-35-40
External finish color Unit: Galvanized sheets with gray heat insulation
Grille: ABS resin Munsell 6.4Y 8.9/0.4
Dimensions unit <Grille> W in. 22-7/16 <25-19/32>
D in. 22-7/16 <25-19/32>
H in. 8-3/16 <25/32>
Weight unit <Grille> lb. 36 <7>
Field drainpipe O.D. in. 1-1/4
Control voltage (by buit-in transformer) 12 - 24 VDC
NOTE : Test conditions are based on AHRI 210/240.
●The air coverage is the figure up to the position
where the air speed is 1 ft./s., when air is blown
out horizontally from the unit properly at the
High speed position.
The coverage should be used only as a general
guideline since it varies according to the size of
the room and furniture arraged inside the room.
Min. 187 208 Max. 253230

6
SLZ-KA12NA.TH
High
Medium
39
SPL(dB)
40
LINE
<60Hz>
NOTCH
Low 30
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
SLZ-KA09NA.TH
High
Medium
38
SPL(dB)
22
LINE
<60Hz>
NOTCH
Low 29
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
NOISE CRITERION CURVES
UNIT
5 ft
MICROPHONE
CEILING
SLZ-KA15NA.TH
High
Medium
40
SPL(dB)
35
LINE
<60Hz>
NOTCH
Low 31
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound
may be bigger than the indicated level in actual use due to surrounding echoes. The sound level can be higher
by about 2 dB than the indicated level during cooling and heating operation.

77
OUTLINES AND DIMENSIONS
3
SLZ-KA15NA
SLZ-KA12NA
SLZ-KA09NA
Models
(W6.35mm)
flared connection
Refrigerent pipe
(liquid)
Refrigerent pipe
(gas)
(W9.52mm)
flared connection
3/8 inch
Detail drawing of fresh air intake
Ceiling surface
Cut out hole
:2-7/8(:73.4)
Burring hole
3-:1/8(:2.8)
:3-15/16(:100)
4-21/32(118)
1(25)
120

120
+5
0
(27 )
+3/16
0
1-1/16
19/32~1-15/32(15~37) 19/32~1-15/32(15~37)
22-11/16~24-13/32(576~620)
22-7/16(570)
20-7/8(530)
Grille
Fresh air
intake
Drain pipe
VP-25 connection
(O.D.:1-1/4(:32))
Vane motor
Drain hole
Air intake grille
2-5/32(55) 1-3/8(35)
1-3/8(35) 2-5/32(55)
Auto vane
Grille
Air intake hole
Air intake hole
Air outlet hole
Air outlet hole
11-27/32(301)
11-27/32(301)
14-27/32(377)
14-27/32(377)
25-19/32(650)
Suspension bolt M10 or W3/8
9-1/16(230)
7-5/32(182)1-7/8(48)
Wiring entry
Terminal block Ceiling surface
9-1/4(235)
8-3/16(208)
7-19/32(193)
25/32(20)
3-21/32(93)
1-1/2~2-9/32(38~58)
2-19/32(66)
4-3/4(121)
21/32(17) 7-15/16(202)
2-7/32(56)
2-1/14(57)
3-7/16(87)
1-7/32(31)
Ceiling hole
Suspension bolt pitch
19/32~1-15/32(15~37) 19/32~1-15/32(15~37)
22-11/16~24-13/32(576~620)
16-17/32(420)
22-7/16(570)
13-3/16(335)
7-27/32(199)
13-27/32(352)
13-3/16(335)
Suspension bolt pitch
Ceiling hole
25-19/32(650)
Brand label
V/M
V/M
V/M
V/M
1/4 inch
(W6.35mm)
flared connection
1/4 inch
(W6.35mm)
flared connection
1/4 inch
(W9.52mm)
flared connection
3/8 inch
(W12.7mm)
flared connection
1/2 inch
Refrigerant
pipe (gas)
Refrigerant
pipe (liquid)
Suspension bolt lower edge
Unit : inch (mm)
SLZ-KA09NA.TH SLZ-KA12NA.TH SLZ-KA15NA.TH

8
WIRED REMOTE CONTROLLER Unit : inch (mm)
5-1/8 (130)
3/4 (19)
4-23/32 (120)
1-23/32 (43.5)
(Option)

99
WIRING DIAGRAM
4
The black square ( ■) indicates a switch position.
CN30
LED3 LED2 LED1
31
FUSE
135 79
7
6
3
2
1
10
5
3RED
(D·HEATER)
CNC
X1
X6 X5 X4 X7
RED
(
POWER
BOARD)
CNDK
WHT
(
POWER
BOARD)
CN2D
RED
(INTAKE)
CN20 BLU
(REMOCON)
CN22
WHT
(LIQUID)
CN21
WHT
(DRAIN)
CN31
GRN
(VANE)
CN6V
BLU
WHT
YLW
ORN
RED
CN2L BLK
(2 PHASE)
CN29
ORN
(
POWER )
CND
BLU
(D·U·M)
CNP BLU
(CONTROL)
CN3C
CNSK
(RED)
CN2S
(WHT)
DC13.1V
WHT
(FAN)
FAN
1
31 15
5
14
12
CN24
CN32 CN51 CN41
12 15
31
31
31 31 31
61
BLU BLU
BLU
BLU
WHT
YLW
BLK
BRN
BLU
WHT
YLW
RED
RED
GRILLE
H2
ORN
RED
WHT
WHT
BLK
RED RED
YLW YLW
RED
RED
ORN
RED
BLU
ORN
CN90
91
31
12 12
2
1
12 1
2
2
21
3
1
ON
OFF
SWE
ON
OFF
SW2
See Fig:+1
12345
20
I.B
M
1~
M
1~
DP
MF
P. B
TB4
TO
OUTDOOR
UNIT
S1
S2
S3
TB15
1
2
TB6
1
2
C1
5
t ° t ° t °
TH5 TH1 TH2
t °
DS
SW2
MODELS
SLZ-
KA09NA
SLZ-
KA12NA
SLZ-
KA15NA
ON
OFF
12345
ON
OFF
12345
ON
OFF
12345
5
5
5
5
MV
MV
MV
MV
RED
CN105
RFI
R.B
+For details on how to operate self-diagnosis refer to the technical manuals etc.
SYMBOL NAME SYMBOL NAME
I.B
INDOOR CONTROLLER BOARD
INDOOR POWER BOARD
FUSE (T6.3AL250V)
CONNECTOR (LOSSNAY)
CONNECTOR (REMOTE SWITCH)
CONNECTOR (HA TERMINAL-A)
CENTRALLY CONTROL
POWER SUPPLY (I.B)
POWER SUPPLY (I.B)
TRANSMISSION (INDOOR-OUTDOOR)
DRAIN PUMP/DEW PREVENTION HEATER
SWITCH (EMERGENCY OPERATION)
SWITCH (CAPACITY CODE)
FAN MOTOR (WITH THERMAL FUSE)
VANE MOTOR
DRAIN PUMP
DRAIN SENSOR
TERMINAL BLOCK
(INDOOR/OUTDOOR CONNECTING LINE)
TERMINAL BLOCK (
REMOTE CONTROLLER
TRANSMISSION LINE
)
TERMINAL BLOCK (
REMOTE CONTROLLER
TRANSMISSION LINE
)
ROOM TEMP. THERMISTOR
(32°F / 15kΩ, 77°F / 5.4kΩDETECT)
PIPE TEMP. THERMISTOR/LIQUID
(32°F / 15kΩ, 77°F / 5.4kΩDETECT)
COND. / EVA. TEMP. THERMISTOR
(32°F / 15kΩ, 77°F / 5.4kΩDETECT)
MF
DEW PREVENTION HEATERH2
FUSE
MV
DP
CAPACITOR (FAN MOTOR)
C1
CN2L
DS
CN32
P.B
CN41
CONNECTOR (RADIO FREQUENCY INTERFACE)
RADIO FREQUENCY INTERFACE FOR
RF THERMOSTAT
CN105
CONNECTOR (BACK-UP HEATING)
CONNECTOR (LLC)
CN24
CN30
CN51
TB4
LED1
TB15
RFI
LED2
TH1
LED3
X1
RELAY (FAN MOTOR LL)
X4
RELAY (FAN MOTOR Lo)
X5
RELAY (FAN MOTOR Hi)
X6
RELAY (FAN MOTOR Me)
X7
TH2
SW2
TH5
TB6
SWE
[LEGEND]
NOTES: 1. Since the outdoor side electric wiring may change be sure to check the
outdoor unit electric wiring for servicing.
2. Indoor and outdoor connecting wires are made with poIarities, make wiring
matching terminal numbers (S1, S2, S3).
3. Use copper supply wires.
4.
SymboIs used in wiring diagram above are, : Connector, : Terminal (block).
R.B
OPTION PART
WIRED REMOTE CONTROLLER BOARD
<Fig: +1>
SLZ-KA09NA.TH SLZ-KA12NA.TH SLZ-KA15NA.TH

10
5REFRIGERANT SYSTEM DIAGRAM
Pipe temperature
thermistor/liquid
(TH2)
Distributor
with strainer
#50
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)
SLZ-KA09NA.TH SLZ-KA12NA.TH SLZ-KA15NA.TH