Mitsubishi Electric KA12 Service manual

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Mitsubishi Electric KA12 Service manual | Manualzz
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
August 2013
No. OC320
REVISED EDITION-G
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name]
Revision:
• Added connectable outdoor unit
SUZ-KA25/35/50VA4.TH in
REVISED EDITION-G.
• Some descriptions have been
modified.
[Service Ref.]
SLZ-KA25VA.TH
SLZ-KA25VA1.TH
SLZ-KA25VAR2.TH
SLZ-KA35VA.TH
SLZ-KA35VA1.TH
SLZ-KA35VAR2.TH
SLZ-KA50VA.TH
SLZ-KA50VA1.TH
SLZ-KA50VAR2.TH
SLZ-KA25VAL.TH
SLZ-KA25VAL1.TH
SLZ-KA25VALR2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VAL.TH
SLZ-KA35VAL1.TH
SLZ-KA35VALR2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VAL.TH
SLZ-KA50VAL1.TH
SLZ-KA50VALR2.TH
SLZ-KA50VALR3.TH
SLZ-KA25VA
SLZ-KA35VA
SLZ-KA50VA
SLZ-KA25VAL
SLZ-KA25VAL2
SLZ-KA35VAL
SLZ-KA50VAL
• Please void OC320
REVISED EDITION-F.
Note:
• This manual describes only
service data of the indoor units.
When servicing outdoor units,
please refer to the outdoor unit's
service manual.
• RoHS compliant products have
<G> mark on the spec name
plate.
• For servicing RoHS compliant
products, refer to the RoHS
Parts List.
CONTENTS
Model name
indication
ON/OFF
AUTO COOL
HEAT DRY
TOO
WARM
TOO
COOL
FAN
SELECT
VANE
TIME
INDOOR UNIT
TEMP.
ON/OFF
MODE
RESET
SLZ-KA25/35/50VAL.TH
SLZ-KA25/35/50VAL1.TH
SLZ-KA25/35/50VALR2.TH
SLZ-KA25VAL2.TH
SLZ-KA35/50VALR3.TH
SLZ-KA25/35/50VA.TH
SLZ-KA25/35/50VA1.TH
SLZ-KA25/35/50VAR2.TH
REMOTE CONTROLLER
1. TECHNICAL CHANGES ...................... 2
2. REFERENCE MANUAL ...................... 2
3. PARTS NAMES AND FUNCTIONS..... 3
4. SPECIFICATIONS ............................... 6
5. OUTLINES AND DIMENSIONS........... 8
6. WIRING DIAGRAM ............................ 11
7. REFRIGERANT SYSTEM DIAGRAM ..... 12
8. TROUBLESHOOTING ....................... 13
9. 4-WAY AIR FLOW SYSTEM.............. 27
10. DISASSEMBLY PROCEDURE .......... 29
11. PARTS LIST....................................... 32
12. RoHS PARTS LIST............................ 36
Use the specified refrigerant only
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
1
TECHNICAL CHANGES
SLZ-KA35VALR2.TH
SLZ-KA50VALR2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VALR3.TH
• INDOOR CONTROLLER BOARD has been changed.
SLZ-KA25VAL1.TH
SLZ-KA35VAL1.TH
SLZ-KA50VAL1.TH
SLZ-KA25VA1.TH
SLZ-KA35VA1.TH
SLZ-KA50VA1.TH
SLZ-KA25VALR2.TH
SLZ-KA35VALR2.TH
SLZ-KA50VALR2.TH
SLZ-KA25VAR2.TH
SLZ-KA35VAR2.TH
SLZ-KA50VAR2.TH
• TURBO FAN and WASHER have been changed.
SLZ-KA25VAL.TH
SLZ-KA35VAL.TH
SLZ-KA50VAL.TH
SLZ-KA25VA.TH
SLZ-KA35VA.TH
SLZ-KA50VA.TH
SLZ-KA25VAL1.TH
SLZ-KA35VAL1.TH
SLZ-KA50VAL1.TH
SLZ-KA25VA1.TH
SLZ-KA35VA1.TH
SLZ-KA50VA1.TH
• PANEL has been changed.
SLP-2AL → SLP-2ALW
SLP-2AA → SLP-2AAW
(White: 0.70Y 8.59/0.97) → (Pure white: 6.4Y 8.9/0.4)
2
REFERENCE MANUAL
2-1. OUTDOOR UNIT’S SERVICE MANUAL
Service Ref.
Service Manual No.
SUZ-KA25/50VA3.TH-A
OCH511/OCB511
SUZ-KA25/35/50VA2.TH
OCH472/OCB472
SUZ-KA25/35/50VA2.TH-A
SUZ-KA25/35VA(R1).TH
SUZ-KA25/35VAH(R1).TH
SUZ-KA35/50VA(1).TH
SUZ-KA35/50VAR2.TH
OCH473/OCB473
OC322
SUZ-KA25/35VA(R1).TH-A
SUZ-KA35/50VA(1).TH-A
SUZ-KA35/50VAR2.TH-A
OC323
SUZ-KA25/35/50VA3.TH
OCH530/OCB530
SUZ-KA25/35/50VA4.TH
OCH545/OCB545
2-2. TECHNICAL DATA BOOK
Series (Outdoor unit)
Data Book No.
SUZ-KA • VA
SUZ-KA • VAH
OCS03
SUZ-KA • VA2
OCS20
SUZ-KA • VA3
OCS22/OCS25
SUZ-KA • VA4
OCS26
OC320G
2
3
PARTS NAMES AND FUNCTIONS
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
Filter
Removes dust and pollutants
from drawn in air.
Indoor Unit
Horizontal Air Outlet
Sets horizontal airflow automatically
during cooling or dehumidifying.
Grille
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Air Intake
Draws in air from room.
Wireless remote controller
TEMPERATURE
SETTING button
h
ON/OFF
TOO
WARM
TOO
COOL
FAN
SELECT
To set any desired room
temperature.
ON / OFF button
To start and to stop operation.
AUTO COOL
HEAT DRY
TIMER SELECT button
VANE
TIME
MODE
To set time to start or stop
unit operation.
FAN SPEED button
MODE SELECT button
To change the operation
mode; Auto, Cooling ,
Heating and Drying . (SLZ)
RESET
To set fan speed to Low,
Medium or High.
VANE CONTROL button
To change the airflow
direction.
Attention:
• Avoid pushing buttons with fingernails and other sharp objects. Sharp objects may damage remote controller.
OC320G
3
● Wired remote controller
Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
ON/OFF button
Temperature setting buttons
Down
Fan Speed button
Up
Timer Menu button
(Monitor/Set button)
Filter
button
(<Enter> button)
Mode button (Return button)
TEMP.
ON/OFF
Set Time buttons
Check button (Clear button)
Back
Ahead
Timer On/Off button
(Set Day button)
Test Run button
MENU
BACK
PAR-21MAA
MONITOR/SET
ON/OFF
FILTER
DAY
CHECK TEST
OPERATION
CLOCK
Airflow Up/Down button
CLEAR
Louver button
(
Operation button)
To return operation
number
Opening the
cover
Ventilation button
( Operation button)
Built-in temperature sensor
OC320G
4
To go to next operation
number
● Wired remote controller
* The functions which can be used are restricted according to the model.
Display Section
For purposes of this explanation,
all parts of the display are shown.
During actual operation, only
the relevant items will be lit.
Day-of-Week
“Sensor” indication
Shows the current day of the week.
Displays when the remote controller
sensor is used.
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.
“Locked” indicator
Indicates that remote controller buttons have been locked.
Identifies the current operation
“Clean The Filter” indicator
Shows the operating mode, etc.
*Multilanguage display is available.
To be displayed on when it is time to
clean the filter.
TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER
AFTER OFF
ERROR CODE
“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohibited by a master controller.
FUNCTION
FILTER
°F°C
°F°C
WEEKLY
SIMPLE
AUTO OFF
ONLY1Hr.
Timer indicators
The indicator comes on if the corresponding timer is set.
Fan Speed indicator
Shows the selected fan speed.
“Timer is Off” indicator
Indicates that the timer is off.
Up/Down Air Direction indicator
Shows the direction of the
outcoming airflow.
“One Hour Only” indicator
Temperature Setting
Shows the target temperature.
OC320G
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.
5
Room Temperature display
Shows the room temperature. The room
temperature display range is 8~39.
The display blinks if the temperature
is less than 8 or 39 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.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
4
SPECIFICATIONS
SLZ-KA35VA(L).TH SLZ-KA50VA(L).TH
SLZ-KA25VA(L).TH
SLZ-KA35VA(L)1.TH SLZ-KA50VA(L)1.TH
SLZ-KA25VA(L)1.TH SLZ-KA25VAL2.TH
SLZ-KA35VA(L)R2.TH SLZ-KA50VA(L)R2.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA35VALR3.TH SLZ-KA50VALR3.TH
Indoor service ref.
Function
Power supply
Fan
motor
Electrical
data
Capacity Air flow (High/Medium/Low)
Power outlet
Running current*
Power input Rated frequency
Dew prevention heater
Power factor*
Fan motor current*
Model
Winding
resistance (at 26:)
Special
remarks
Dimensions
K /h
A
A
W
(kW)
%
A
"
Width
Height
Depth
Weight
Air direction
Sound level(High/Medium/Low)
Fan speed(High/Medium/Low)
Fan speed regulator
Thermistor TH1(at 25:)
Thermistor TH2(at 25:)
Thermistor TH5(at 25:)
mm(in)
mm(in)
mm(in)
kg
dB(A)
rpm
k"
k"
k"
Cooling Heating
Single phase
230V, 50Hz
600/540/480
10
0.35
75
0.014
90
93
0.19
PK6V15-LD
Cooling Heating
Single phase
230V, 50Hz
660/540/480
10
0.40
85
0.014
94
94
0.26
PK6V20-LL
Cooling Heating
Single phase
230V, 50Hz
660/540/480
10
0.40
85
0.014
94
94
0.26
PK6V20-LL
Cooling Heating
Single phase
230V, 50Hz
660/540/480
20
0.65
85
0.014
97
97
0.27
PK6V20-LM
WHT-BLK: 407
BLK-BLU: 86
BLU-YLW: 30
BRN-RED: 165
WHT-BLK: 393
BLK-BLU: 164
BLU-YLW: 47
BRN-RED: 319
WHT-BLK: 393
BLK-BLU: 164
BLU-YLW: 47
BRN-RED: 319
WHT-BLK: 325
BLK-BLU: 143
BLU-YLW: 47
BRN-RED: 309
UNIT: 570(22-7/16)
UNIT: 208(8-3/16)
UNIT: 570(22-7/16)
UNIT: 16.5
4
4
37/31/28
38/33/29
650/530/480
690/570/510
3
3
10
10
10
10
10
10
PANEL: 650(25-9/16)
PANEL: 20(13/16)
PANEL: 650(25-9/16)
PANEL: 3
4
38/33/29
690/570/510
3
10
10
10
4
39/34/30
710/590/530
3
10
10
10
NOTE : Test conditions are based on ISO 5151.
Cooling : Indoor D.B. 27˚C W.B. 19˚C
Outdoor D.B. 35˚C W.B. 24˚C
Heating : Indoor D.B. 20˚C W.B. 15˚C
Outdoor D.B. 7˚C W.B. 6˚C
Refrigerant piping length (one way): 5m
*Measured under rated operating frequency
Specifications and rating conditions of main electric parts
INDOOR UNIT
Service ref.
Item
1.5+ 440V
(FUSE)
250V 6.3A
Vane motor
Terminal block
(MV)
OC320G
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
MSBPC20 12V 250"
(TB) TO OUTDOOR UNIT: 3P TO WIRED REMOTE CONTROLLER: 2P (SLZ-KA25/35/50VA)
Indoor fan motor thermal fuse
Cord Heater
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
(C1)
Indoor fan capacitor
Fuse
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA25VAL2.TH
141:i3:
(H2)
240V AC 15W
6
NOISE CRITERION CURVES
<50Hz>
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
NOTCH SPL(dB)
High
37
Medium
31
Low
28
LINE
SLZ-KA25VAL2.TH
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
20
10
LINE
90
63
125
250
NC-20
500
1000
2000
4000
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
90
<50Hz>
NOTCH SPL(dB)
High
38
Medium
33
Low
29
80
70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
8000
NC-70
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
BAND CENTER FREQUENCIES, Hz
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
125
NC-20
250
500
1000
2000
4000
8000
BAND CENTER FREQUENCIES, Hz
<50Hz>
NOTCH SPL(dB)
High
39
Medium
34
Low
30
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
90
UNIT
80
CEILING
70
NC-70
60
NC-60
1.5m
50
NC-50
40
NC-40
MICROPHONE
30
NC-30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
8000
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.
OC320G
7
W 100
118
W 73.4
Cut out hole
Emergency operation switch(heating)
Emergency operation switch(cooling)
Receiver
Refrigerent pipe (liquid)
Refrigerent pipe (gas)
17
202
230
35 55
V/M
V/M
377
Air intake hole
Grille
Terminal block
(Case of Wired remote controller)Terminal block
650
301
Air outlet hole
15~37
199
352
335
576~620 Ceiling hole
570
530
Suspension bolt
pitch
V/M
V/M
Ceiling surface
15~37
Brand label
Vane motor
Air intake grille
Auto vane
Drain hole
Grille
W 12.7mm
flared connection
1/2 inch
W 9.52mm
flared connection
3/8 inch
W 6.35mm
flared connection
1/4 inch
SLZ-KA35VA(L)
W 6.35mm
flared connection
1/4 inch
W 9.52mm
flared connection
3/8 inch
W 6.35mm
flared connection
1/4 inch
SLZ-KA25VA(L)
SLZ-KA25VAL2
SLZ-KA50VA(L)
Refrigerent pipe
(gas)
Models
Refrigerent pipe
(liquid)
Wiring entry
Suspension bolt
M10 or 3/8
(procure locally)
Drain pipe
VP-25 connection
(O.D. W 32)
SLZ-KA25VA(L).TH
SLZ-KA35VA(L).TH
SLZ-KA50VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA35VA(L)1.TH
SLZ-KA50VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VALR3.TH
DEFROST/STAND BY lamp
Operation lamp
(WIRELESS PANEL)
Ceiling surface
25
66
121
3- W 2.8 hole
Burring hole
93
650
Detail drawing of fresh air intake
12
0
15~37
576~620 Ceiling hole
15~37
Fresh air
intake
420
Suspension bolt pitch
57
56
38~58
55 35 Suspension bolt
lower edge
301
Air outlet hole
335
193
570
87
235
20
31
208
+5
27 0
8
377
Air intake hole
182
OC320G
0
12
48
5
OUTLINES AND DIMENSIONS
Unit: mm
Unit: mm
WIRELESS REMOTE CONTROLLER
57
17.5
h
140
ON/OFF
AUTO COOL
HEAT DRY
TOO
WARM
TOO
COOL
FAN
SELECT
VANE
TIME
MODE
RESET
OC320G
Installation area
• Area in which the remote controller is not exposed to direct sunlight
• Area in which there is no heating source nearby
• Area in which the remote controller is not exposed to cold (or hot) winds
• Area in which the remote controller can be operated easily
• Area in which the remote controller is beyond the reach of children
Installation method
Attach the remote controller holder to the desired location using 2 tapping screws.
Insert the lower end of the controller into the holder.
Wireless remote controller (Accessory)
Wall
Remote controller holder (Accessory)
Fixing screw (Accessory)
• The signal can travel up to approximately 7 meters (in a straight line) within 45
degrees to both right and left of the center line of the receiver.
In addition, the signal may not be received if there is interference of light of fluorescent
lights or strong sunlight.
9
Unit: mm
WIRED REMOTE CONTROLLER
43.5
120
130
83.5
19
46
OC320G
10
6
WIRING DIAGRAM
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
TB4
S1
S2
S3
GRILLE
MF
MV
5
MV
5
W.B
CNB
BZ
LED2
LED1
SKY BLU
PINK
GRY
VLT
BLU
9 YLW
ORN
RED
BRN
1
3
ORN
C1
P.B
RED
9
8
7
6
5
4
3
2
1
1 3 5 7 9
WHT
)$1
FAN
1
3
RED
1
'Â+($7(5
CNC
3 RED
1
(POWER
%2$5'
CNDK
FUSE
3 BLU 1
'Â8Â0
CNP
X1
ORN
BLU
20
M
1~
RED
BLU
5
7
6
3
2
1
3 ORN
(POWER
CND
1
X6 X5 X4
X7
2
12345
1
SW2
KA50
ON
OFF
3
CN51
5
6
1
CN41
1 4
See fig:*1
1
GRN
9$1(
CN6V
1
5
12345
9
CN90
:,5(/(66
WHT
1
9
12345
1 2
1
2
LED1
BLU
WHT
/,48,' 5(02&21
CN22
CN21
2
1
2
1
t°
t°
TH5
t°
TH1
t°
TH2
2
TB15
1
2
R.B
TB6
1
2
ĺ
[LEGEND]
SYMBOL
C1
DP
DS
H2
MF
MV
TB4
NAME
&$3$&,725)$102725
DRAIN PUMP
DRAIN SENSOR
DEW PREVENTION HEATER
)$102725:,7+7+(50$/)86(
VANE MOTOR
TERMINAL BLOCK
,1'225287'225&211(&7,1*/,1(
TB15
TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE
TH1
ROOM TEMP. THERMISTOR
(0ƒ&Nȍƒ&Nȍ'(7(&7
TH2
PIPE TEMP. THERMISTOR/LIQUID
ƒ&Nȍƒ&Nȍ'(7(&7
TH5
COND. / EVA. TEMP. THERMISTOR
ƒ&Nȍƒ&Nȍ'(7(&7
OPTION PARTS
WIRED REMOTE CONTROLLER BOARD
R.B
TERMINAL BLOCK (REMOTE CONTROLLER
TB6
TRANSMISSION LINE
* For details on how to operate self-diagnosis refer to the technical manuals etc.
OC320G
2
11
CN2S
:+7
BLK
WHT
*Case of wired model
NOTES:1. 6LQFHWKHRXWGRRUVLGHHOHFWULFZLULQJPD\FKDQJHEHVXUHWRFKHFNWKH
outdoor unit electric wiring for servicing.
2. ,QGRRUDQGRXWGRRUFRQQHFWLQJZLUHVDUHPDGHZLWKSR,DULWLHVPDNHZLULQJ
matching terminal numbers (666
3. 6\PER,VXVHGLQZLULQJGLDJUDPDERYHDUH:&RQQHFWRU:Terminal (block
NAME
INDOOR POWER BOARD
INDOOR CONTROLLER BOARD
&211(&725/2661$<
&211(&7255(027(6:,7&+
&211(&725+$7(50,1$/$
CENTRALLY CONTROL
)86(7$/9
32:(56833/<,%
32:(56833/<,%
75$160,66,21,1'225287'225
6:,7&+&$3$&,7<&2'(
6:,7&+02'(6(/(&7,21
6:,7&+(0(5*(1&<23(5$7,21
DRAIN PUMP/DEW PREVENTION HEATER
5(/$<)$102725//
5(/$<)$102725/R
5(/$<)$102725+L
5(/$<)$1027250H
WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
BUZZER
/('581,1',&$725
/('+27$'-867
6:,7&++($7,1*212))
6:,7&+&22/,1*212))
RED
BLK
3+$6( ,17$.(
CN20
CN29
1
DS
*Case of wireless model
12345
The black square(Ŷindicates a switch position.<*1>
SYMBOL
P.B
I.B
CN2L
CN32
CN41
CN51
FUSE
LED1
LED2
LED3
SW2
SW3
SWE
X1
X4
X5
X6
X7
W.B
RU
BZ
LED1
LED2
SW1
SW2
WHT
'5$,1
CN31
3
ĺ
KA35
CN105
5
CN32
ON
OFF
1
LED2
1
2
BLU
BLU
OFF
REMOTE
CONTROLLER
LED3
SKY BLU
PINK
GRY
VLT
BLU
YLW
ORN
RED
BRN
RU
KA25
3
DC13.1V
WHT
(POWER
%2$5'
CN2D
RED
ORN
YLW
WHT
BLU
SW3
SWE
ON
ON
OFF
OFF
12345
SW2
CN2L
ON
ON
OFF
1
1
SW2
<fig:*1>
MODELS
I.B
CNSK
5('
3
BLU
&21752/
CN3C
SW1
W.R
TO
OUTDOOR
UNIT
M
1~
RED
WHT
MV
RED
ORN
YLW
WHT
BLU
DP
YLW
YLW
5
10
5
YLW
YLW
MV
YLW
YLW
BLK
YLW
BRN
WHT
BLU
H2
7
REFRIGERANT SYSTEM DIAGRAM
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
Strainer
#50
Heat exchanger
Refrigerant GAS pipe connection
(Flare)
Condenser/evaporator
temperature thermistor
(TH5)
Refrigerant flow in cooling
Refrigerant flow in heating
Refrigerant LIQUID pipe connection
(Flare)
Pipe temperature
thermistor/liquid
(TH2)
Room temperature
thermistor (TH1)
Distributor
with strainer
#50
OC320G
Strainer
#50
12
8
TROUBLESHOOTING
8-1. CAUTIONS ON TROUBLESHOOTING
(1) Before troubleshooting, check the followings:
Check the power supply voltage.
Check that the indoor/outdoor connecting wire is correct.
(2) Take care of the followings during servicing.
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.
When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the
components.
When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
Lead wire
8-2. SELF-CHECK
Wireless remote controller
h
ON/OFF
TOO
WARM
TOO
COOL
FAN
SELECT
VANE
TIME
AUTO COOL
HEAT DRY
MODE
RESET
[Procedure]
Turn ON the power.
While pressing both the MODE SELECT button and
TOO COOL button on the remote controller at the same
time, press the RESET button.
Firstly, release the RESET button.
And release the other 2 buttons since all LCD in
operation display section of the remote controller is
displayed after 3 seconds.
Transmit the signal of remote controller, pressing ON/ OFF
button on the remote controller.
(The above procedure allows OPERATION INDICATOR lamp
to indicate the failure-mode.)
Transmit the signal of remote controller, pressing ON/ OFF
button to stop the self-check.
OPERATION INDICATER
OC320G
13
‡ Refer to the following tables for details on the check codes.
[Output pattern A]
Beeper sounds
OPERATION
INDICATOR
lamp blink
pattern
Beep
Beep Beep Beep
Off
Beep
1st
2 nd
3 rd
nth
On
On
On
On
Beep Beep
1st
Off
On
2 nd · · · Repeated
On
0.5 sec. Approx. 2.5 sec. 0.5 sec. 0.5 sec.
Self-check Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
starts
(Start signal
Number of blinks/beeps in pattern indicates the check
Number of blinks/beeps in pattern indicates
received)
code in the following table (i.e., n=5 for “P5”)
the check code in the following table
[Output pattern B]
Beeper sounds
OPERATION
INDICATOR
lamp blink
pattern
Beep
Beep Beep Beep
1st
Off
On
Approx. 3 sec.
Self-check Approx. 2.5 sec.
starts
(Start signal
received)
2nd
Beep
Beep
nth
1st
3 rd
On
On
On
0.5 sec. 0.5 sec. 0.5 sec.
On
Off
0.5 sec. Approx. 2.5 sec.
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
On
Approx. 3 sec.
Beep
2 nd · · · Repeated
On
On
0.5 sec. 0.5 sec.
Number of blinks/beeps in pattern indicates
the check code in the following table
[Output pattern A] Errors detected by indoor unit
Wireless remote controller Wired remote controller
Beeper sounds/OPERATION
INDICATOR lamp blinks
1 Check code
(Number of times)
1
P1
P2
2
P9
3
E6,E7
4
P4
5
P5
6
P6
7
EE
8
P8
9
E4, E5
–
10
–
11
12
Fb
14
PL
E0, E3
–
–
E1, E2
Symptom
Remarks
Intake sensor error
Pipe (TH2) sensor error
Pipe (TH5) sensor error
Indoor/outdoor unit communication error
Drain sensor error
Drain pump error
Freezing/Overheating protection operation
Communication error between indoor and outdoor units
Pipe temperature error
Remote controller signal receiving error
–
–
Indoor unit control system error (memory error, etc.)
Refrigerant circuit abnomal
Remote controller transmission error
Remote controller control board error
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller Wired remote controller
Beeper sounds/OPERATION
INDICATOR lamp blinks
1 Check code
(Number of times)
1
E9
2
3
4
UP
U3,U4
UF
5
U2
6
U1,Ud
7
8
9
10
U5
U8
U6
U7
11
U9,UH
12
13
14
–
–
Others
Symptom
Remarks
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 operated/
insufficient refrigerant
Abnormal high pressure (63H operated)/Overheating
protection operation
Abnormal temperature of heatsink
Outdoor unit fan protection stop
Compressor overcurrent interruption/Abnormal of power module
Abnormality of superheat 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.
As for outdoor
unit, refer to
outdoor unit’s
service manual.
Notes:
1. If the beeper does not sound again after the initial 2 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 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial 2 beeps to confirm
the self-check start signal was received, the specified refrigerant address is incorrect.
OC320G
14
continued to the next page.
• On 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.
• If the unit cannot be operated properly after the test run, refer to the following table to find out the cause.
Symptom
Wired remote controller
PLEASE WAIT
PLEASE WAIT → Error code
Cause
For about 2 minutes after power-on
Subsequent to about 2 minutes
after power-on
No messages appear even
when operation switch is turned
ON (operation lamp does not
light up).
•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
•Incorrect wiring between indoor and outdoor units.
(incorrect polarity of S1, S2, S3)
•Remote controller wire short
On the wireless remote controller with condition above, following phenomena take place.
• No signals from the remote controller can be received.
• Operation 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)
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
LED2 (power for remote controller)
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”.
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.
LED1 (power for microprocessor)
OC320G
15
8-3. SELF-DIAGNOSIS ACTION TABLE
Error Code
Note: Refer to the manual of outdoor unit for the details of display
such as F, U, and other E.
Abnormal point and detection method
Cause
Room temperature thermistor (TH1)
1 Defective thermistor
1The unit is in 3-minute resume prevention
characteristics
mode if short/open of
2 Contact failure of connector
thermistor is detected. Abnormal if the
(CN20) on the indoor controller
unit does not reset normally after 3
board (Insert failure)
minutes. (The unit returns to normal
Breaking of wire or contact
operation, if it has been reset normally.)
failure of thermistor wiring
2 Constantly detected during cooling,
Defective indoor controller
drying and heating operation
board
Short: -90˚C or more
Open: -40˚C or less
P1
Countermeasure
Check resistance value of thermistor.
0˚C.....15.0kΩ
10˚C.......9.6kΩ
20˚C.......6.3kΩ
30˚C.......4.3kΩ
40˚C.......3.0kΩ
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 8-5.
Turn the power back on and check restart
after inserting connector again.
Check room temperature display on remote
controller.
Replace indoor controller board if there
is abnormal difference with actual room
temperature.
1~
Turn the power off, and on again to operate
after checking.
P2
Pipe temperature thermistor/Liquid
(TH2)
1 The unit is in 3-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3
minutes. (The unit returns to normal
operation, if it has been reset normally.)
2 Constantly detected during cooling,
drying, and heating (except defrosting)
operation.
Short: 90˚C or more
Open: -40˚C or less
~
Check resistance value of thermistor.
1 Defective thermistor
characteristics
For characteristics, refer to (P1) above.
2 Contact failure of connector
2 Check contact failure of connector (CN21)
(CN21) on the indoor controller
on the indoor controller board. Refer to 8-5.
board (Insert failure)
Turn the power on and check restart after
Breaking of wire or contact
inserting connector again.
failure of thermistor wiring
Check pipe <liquid> temperature with
Defective refrigerant circuit is
remote controller in test run mode. If pipe
causing thermistor temperature
<liquid> temperature is extremely low (in
of 90˚C or more or -40˚C or
cooling mode) or high (in heating mode),
less.
refrigerant circuit may have defect.
Defective indoor controller board
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.
Turn the power off, and on again to operate
after checking.
P4
P5
Drain sensor (DS)
1 Suspensive abnormality, if short/open
of thermistor is detected for 30 seconds
continuously.
Turn off compressor and indoor fan.
2 Short/open is detected for 30 seconds
continuously during suspensive
abnormality.
(The unit returns to normal operation,
if it has been reset normally.)
Detect the following condition.
• During cooling and drying operation
• In case that pipe <liquid> temperature room temperature <-10deg
(Except defrosting)
• When pipe <liquid> temperature
or room temperature is short/open
temperature.
• During drain pump operation
Malfunction of drain pump (DP)
1 Suspensive abnormality, if thermistor of
drain sensor heats itself and temperature
rises slightly. Turn off compressor and
indoor fan.
2Drain pomp is abnormal if the condition
above is detected during suspensive
abnormality.
Constantly detected during drain pump
operation
OC320G
1 Defective thermistor
1~3 Check resistance value of thermistor.
characteristics
0˚C.....6.0kΩ
10˚C.......3.9kΩ
2 Contact failure of connector
(CN31) on the indoor controller
20˚C.......2.6kΩ
board (Insert failure)
30˚C.......1.8kΩ
Breaking of wire or contact
40˚C.......1.3kΩ
failure of drain sensor wiring
2 Check contact failure of connector (CN31)
on the indoor controller board. Refer to 8-5.
Defective indoor controller board
Turn the power back on and check restart
after inserting connector again.
4 Replace indoor controller board if drain
pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited,
and abnormality reappears.
Turn the power off, and on again to operate
after checking.
1 Malfunction of drain pump
2 Defective drain
Clogged drain pump
Clogged drain pipe
Attached drop of water at the
drain sensor
• Drops of drain trickles from
lead wire
• Clogged filter is causing
wave of drain.
Defective indoor controller board
16
1 Check if drain pump operates.
2 Check drain function.
3 Check the setting of lead wire of drain
sensor and check clogs of the filter.
4 Replace indoor controller board if drain
pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited
and abnormality reappears.
Refer to 8-5.
Turn the power off, and on again to operate
after checking.
Error Code
Abnormal point and detection method
Freezing/overheating protection is
operating
Freezing protection (Cooling mode)
The unit is in 6-minute resume prevention
mode if pipe <liquid or condenser/
evaporator> temperature stays under
-15˚C for 3 minutes after the compressor
started. Abnormal if it stays under -15˚C
for 3 minutes again within 16 minutes
after 6-minute resume prevention mode.
Overheating protection (Heating mode)
The units is in 6-minute resume
prevention mode if pipe <condenser /
evaporator> temperature is detected as
over 70˚C after the compressor started.
Abnormal if the temperature of over
70˚C is detected again within 10 minutes
after 6-minute resume prevention mode.
(Heating mode)
(Heating mode)
1 Clogged filter (reduced airflow) 1 Check clogs of the filter.
Short cycle of air path
Remove blockage.
Overload (high temperature)
operation out of the tolerance
range
Defective indoor fan motor
Measure the resistance of fan motor's
• Fan motor is defective.
winding.
• Indoor controller board is
Measure the output voltage of fan's connector
defective.
(FAN) on the indoor controller board.
* The indoor controller board should be
normal when voltage of AC 220~240V is
detected while fan motor is connected.
Refer to 8-5.
Defective outdoor fan control
Check outdoor fan motor.
~ Check operating condition of refrigerant
Overcharge of refrigerant
circuit.
Defective refrigerant circuit
(clogging)
Bypass circuit of outdoor unit
is defective.
P6
P8
Countermeasure
Cause
(Cooling or drying mode)
(Cooling or drying mode)
1 Clogged filter (reduced airflow) 1 Check clogging of the filter.
Short cycle of air path
Remove blockage.
Low-load (low temperature)
operation out of the tolerance
range
Defective indoor fan motor
Measure the resistance of fan motor's winding.
• Fan motor is defective.
Measure the output voltage of fan's connector
• Indoor controller board is
(FAN) on the indoor controller board.
defective.
* The indoor controller board should be normal when voltage of AC 220~240V is
detected while fan motor is connected.
Refer to 8-5.
Defective outdoor fan control
Check outdoor fan motor.
Check operating condition of refrigerant Overcharge of refrigerant
circuit.
Defective refrigerant circuit
(clogging)
Pipe temperature
1 Slight temperature difference
<Cooling mode>
between indoor room
Detected as abnormal when the pipe temtemperature and pipe <liquid
perature is not in the cooling range 3 minor condenser / evaporator>
utes after compressor start and 6 minutes
temperature thermistor
after the liquid or condenser/evaporator pipe
• Shortage of refrigerant
is out of cooling range.
• Disconnected holder of
Note 1) It takes at least 9 min. to detect.
pipe <liquid or condenser /
Note 2) Abnormality P8 is not detected in
evaporator> thermistor
drying mode.
• Defective refrigerant circuit
Converse connection of
Cooling range: -3 deg (TH-TH1)
extension pipe (on plural units
TH: Lower temperature between liquid pipe
connection)
temperature (TH2) and condenser/
Converse wiring of indoor/
evaporator temperature (TH5)
outdoor unit connecting wire
TH1: Intake temperature
(on plural units connection)
Defective detection of indoor
<Heating mode>
room temperature and pipe
When 10 seconds have passed after the
<condenser / evaporator>
compressor starts operation and the hot
temperature thermistor
adjustment mode has finished, the unit is
Stop valve is not opened
detected as abnormal when condenser/
completely.
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 (TH5-TH1)
OC320G
17
1~
(
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)’.
)
Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
Error Code
P9
Countermeasure
Abnormal point and detection method
Cause
Pipe temperature thermistor / Condenser
/ Evaporator (TH5)
1 Defective thermistor
1 The unit is in 3-minute resume protec1~ Check resistance value of thermistor.
characteristics
tion mode if short/open of thermistor is
For characteristics, refer to (P1) above.
detected. Abnormal if the unit does not
2 Contact failure of connector
2 Check contact failure of connector (CN29)
(CN29) on the indoor controller
get back to normal within 3 minutes. (The
on the indoor controller board.
board (Insert failure)
unit returns to normal operation, if it has
Refer to 8-5.
Breaking of wire or contact
been reset normally.)
Turn the power on and check restart after
failure of thermistor wiring
2 Constantly detected during cooling,
inserting connector again.
Temperature of thermistor is
drying, and heating operation (except
Operate in test run mode and check pipe
90°C or more or -40°C or less
defrosting)
<condenser/evaporator> temperature with
Short: 90°C or more
outdoor controller circuit board. If pipe
caused by defective refrigerant
<condenser/evaporator> temperature is
circuit.
Open: -40°C or less
extremely low (in cooling mode) or high (in
Defective indoor controller
heating mode), refrigerant circuit may have
board
defect.
Operate in test run mode and check pipe
<condenser/evaporator> temperature
with outdoor control circuit board. If there
is extreme difference with actual pipe
<condenser/evaporator> temperature replace
indoor controller board.
There is no abnormality if none of the above
comes within the unit.
Turn the power off and on again to operate.
In case of checking pipe temperature
with outdoor controller circuit board,
be sure to connect A-control service
tool (PAC-SK52ST).
(
PL
Abnormal refrigerant circuit
During Cooling, Dry, or Auto Cooling
operation, when the following are
regarded as failures when detected for
one second.
a)The compressor continues to run for 30
or more seconds.
b)The liquid pipe temperature or the
condense/evaporator temperature is
75°C or more.
*These detected errors will not be
cancelled until the power source is
reset.
Remote controller transmission
error(E0)/signal receiving error(E4)
1 Abnormal if main or sub remote controller cannot receive any transmission
normally from indoor unit of refrigerant
address “0” for 3 minutes.
(Error code : E0)
2 Abnormal if sub-remote controller could
not receive for any signal for 2 minutes.
(Error code: E0)
E0
or
E4
1 Abnormal if indoor controller board
cannot receive normally any data from
remote controller board or from other
indoor controller board for 3 minutes.
(Error code: E4)
2 Indoor controller board cannot receive
any signal from remote controller for 2
minutes. (Error code: E4)
OC320G
1 Abnormal operation of 4-way
valve
2 Disconnection of or leakage in
refrigerant pipes
Air into refrigerant piping
Abnormal operation (no
rotation) of indoor fan
· Defective fan motor.
· Defective indoor control board.
Defective refrigerant circuit
(clogging)
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.
Miswiring of remote controller
Defective transmitting/receiving
circuit of remote controller
Defective transmitting/receiving
circuit of indoor controller board
of refrigerant address “0”
Noise has entered into the
transmission wire of remote
controller.
18
)
1 When this error occurs, be sure to
replace the 4-way valve.
2 Check refrigerant pipes for disconnection or
leakage.
3 After the recovery of refrigerant, vacuum
dry the whole refrigerant circuit.
4 Refer to section 8-7.
5 Check refrigerant circuit for operation.
*To avoid entry of moisture or air into
refrigerant circuit which could cause
abnormal high pressure, purge air in
refrigerant circuit or replace refrigerant.
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. 500 m
(Do not use cable × 3 or more)
• The number of connecting indoor units:
max. 16 units
• The number of connecting remote
controller: max. 2 units
When the above-mentioned problem of
1~3are not seen.
Diagnose remote controllers.
a) When “RC OK” is displayed, remote
controllers have no problem.
Turn 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” or “ERC 00-66” is displayed,
noise may be causing abnormality.
Abnormal point and detection method
Error Code
E3
or
E5
Remote controller transmission
error(E3)/signal receiving error(E5)
1 Abnormal if remote controller could not
find blank of transmission path for 6
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)
E7
Fb
(FB)*
E1
or
E2
Countermeasure
1 2 remote controllers are set as 1 Set a remote controller to main, and the
other to sub.
“main.”
(In case of 2 remote controllers)
2 Remote controller is connected 2 Remote controller is connected with only one
indoor unit.
with 2 indoor units or more.
3 The address changes to a separate setting.
Repetition of refrigerant
address
~ Diagnose remote controller.
Defective transmitting/receiving
a) When “RC OK” is displayed, remote concircuit of remote controller
trollers have no problem.
1 Abnormal if indoor controller board could
Defective transmitting/receiving
Turn the power off, and on again to check.
not find blank of transmission path.
circuit
of
indoor
controller
board
When becoming abnormal again, replace
(Error code: E5)
Noise has entered into transmisindoor controller board.
2 Indoor controller board receives
sion wire of remote controller.
b) When “RC NG” is displayed, replace
transmitted data at the same time,
remote controller.
compares the data, and when detecting
c) When “RC E3” or “ERC 00-66” is displayed,
it, judges different data to be abnormal
noise may be causing abnormality.
30 continuous times. (Error code: E5)
Indoor/outdoor unit communication
error (Signal receiving error)
1 Abnormal if indoor controller board
cannot receive any signal normally for 6
minutes after turning the power on.
E6
Cause
2 Abnormal if indoor controller board
cannot receive any signal normally for 3
minutes.
Consider the unit abnormal under the
following condition: When 2 or more
indoor units are connected to one
outdoor unit, indoor controller board
cannot receive a signal for 3 minutes
from outdoor controller circuit board, a
signal which allows outdoor controller
circuit board to transmit signals.
1 Contact failure, short circuit or, 1 Check disconnection or looseness of indoor/
outdoor unit connecting wire of indoor unit or
miswiring (converse wiring) of
outdoor unit.
indoor/outdoor unit connecting
Check all the units in case of twin indoor unit
wire
system.
2 Defective transmitting/receiving circuit of indoor controller
2~4Turn the power off, and on again to
check. If abnormality generates again,
board
replace indoor controller board or outdoor
Defective transmitting/receiving
controller circuit board.
circuit of indoor controller board
* Other indoor controller board may have
Noise has entered into indoor/
defect in case of twin indoor unit system.
outdoor unit connecting wire.
Indoor/outdoor unit communication
1 Defective transmitting receiving 1~3 Turn the power off, and on again to
error (Transmitting error)
check. If abnormality generates again,
circuit of indoor controller board
Abnormal if “1” receiving is detected 30
replace indoor controller board.
2 Noise has entered into power
times continuously though indoor controller
supply.
board has transmitted “0”.
3 Noise has entered into outdoor
control wire.
Indoor controller board
Abnormal if data cannot be normally read
from the nonvolatile memory of the indoor
controller board.
1 Defective indoor controller
board
Remote controller control board
1 Abnormal if data cannot be normally
1 Defective remote controller
read from the nonvolatile memory of the
remote controller control board.
(Error code: E1)
2 Abnormal if the clock function of remote
controller cannot be normally operated.
(Error code: E2)
OC320G
19
1 Replace indoor controller board.
* The check code in the parenthesis indicates
PAR-30MAA model.
1 Replace remote controller.
Error Code
PA
(2502)
(2500)
Abnormal point and detection method
Cause
Countermeasure
Forced compressor stop
(due to water leakage abnormality)
1 When the intake temperature subtracted 1 Drain pump trouble
1 Check the drain pump.
from liquid pipe temperature is less than
-10°C, drain sensor detects whether it is 2 Drain defective
2 Please check whether water can be drained.
soaked in the water or not at the interval
· Drain pump clogging
of 90 seconds. (Drain pump will start
· Drain pipe clogging
operating when the drain sensor detects
to be soaked in the water.)
Open circuit of drain sensor
Check the resistance of the drain sensor side
2 The unit has a water leakage abnormality
side heater
heater.
when the following conditions, a) and b),
are satisfied while the above-mentioned
Contact failure of drain sensor
Check the connector contact failure.
detection is performed.
connector
a) The drain sensor detects to be
soaked in the water 10 times in a row.
Dew condensation on drain
Check the drain sensor lead wire mounted.
b) The intake temperature subtracted
sensor
Check the filter clogging.
from liquid pipe temperature is
· Drain water trickles along lead
detected to be less than -10°C for a
wire.
total of 30 minutes.
· Drain water waving due to filter
(When the drain sensor detects to
clogging
be NOT soaked in the water, the
detection record of a) and b) will be
Check the piping connection.
Extension piping connection
cleared.)
difference at twin, triple,
The drain sensor detection is performed
quadruple system
in operations other than cooling. (When
the unit stops operating, during heat
Miswiring of indoor/outdoor
Check the indoor/outdoor connecting wires.
ing or fan operation, when the unit stops
connecting at twin, triple,
because of some abnormality)
quadruple system
*Once the water leakage abnormality is
detected, abnormality state will not be
Room temperature thermistor/
Check the room temperature display of
released until the main power is reset.
liquid pipe temperature
remote controller.
themistor detection is defective.
Check the indoor liquid pipe temperature
display of outdoor controller board.
OC320G
20
8-4. TROUBLESHOOTING OF PROBLEMS
Note: Refer to the manual of outdoor unit for the detail of remote
controller.
Phenomena
Cause
(1) LED2 on indoor controller board • When LED1 on indoor controller board is also off.
1 Power supply of rated voltage is not supplied to outis off.
door unit.
2 Defective outdoor controller circuit board
Power supply of 220~240V is not supplied to indoor
unit.
Defective indoor power board
Defective indoor controller board
• When LED1 on indoor controller board is lit.
1 Mis-setting of refrigerant address for outdoor unit
(There is no unit corresponding to refrigerant
address “0”.)
(2) LED2 on indoor controller board
is blinking.
OC320G
Countermeasure
1 Check the voltage of outdoor power
supply terminal block (L, N) or (L3, N).
• When AC 220~240V is not detected,
check the power wiring to outdoor unit
and the breaker.
• When AC 220~240V is detected,
check 2 (below).
2 Check the voltage between outdoor
terminal block S1 and S2.
• When AC 220~240V is not detected,
—check the fuse on outdoor controller
circuit board.
—check the wiring connection.
• When AC 220~240V is detected,
check
(below).
Check the voltage between indoor terminal
block S1 and S2.
• When AC 220~240V is not detected,
check indoor/outdoor unit connecting
wire for miswiring.
• When AC 220~240V is detected,
check
(below).
Check voltage output from CN2S on indoor
power board (DC13.1V). Refer to 8-5.
• When no voltage is output,
check the wiring connection.
• When output voltage is between
DC12.5V and DC13.7V,
check
(below).
Check the wiring connection between
indoor controller board and indoor power
board. Check the fuse on indoor controller
board. If no problems are found, indoor
controller board is defective.
1 Check the setting of refrigerant address
for outdoor unit.
Set the refrigerant address to “0”.
(For grouping control system under
which 2 or more outdoor units are
connected, set one of the units to “0”.)
Set refrigerant address using SW1 (3-6)
on outdoor controller circuit board.
• When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire
Connection failure of indoor/outdoor unit connecting for connection failure.
wire
• When LED1 is lit
1 Miswiring of remote controller wires
1 Check the connection of remote
Under twin indoor unit system, 2 or more indoor units
controller 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 Refrigerant address for outdoor unit is wrong or not
2 Check the setting of refrigerant address
set.
in case of grouping control system. If
Under grouping control system, there are some units
there are some units whose refrigerant
whose refrigerant address is 0.
addresses are 0 in one group, set one of
the units to 0 using SW1 (3-6) on outdoor
controller circuit board.
Short-cut of remote controller wires
Remove remote controller wires and
check LED2 on indoor controller board.
Defective remote controller
• 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.
21
8-5. TEST POINT DIAGRAM
8-5-1. Indoor power board
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
CN2S
Connect to the indoor controller board (CN2D)
to
12.6-13.7V DC (Pin (+))
between
CNSK
Connect to the indoor controller board
(CNDK)
between
to 220-240V AC
CN2S
Connect to the indoor controller board (CN2D)
to
12.6-13.7V DC (Pin (+))
between
CNSK
Connect to the indoor controller board
(CNDK)
between
to 220-240V AC
OC320G
22
8-5-2. Indoor controller board
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
LED1
Power supply LED2
Power supply
(I.B)
(R.B)
LED3
Transmission
(Indoor/outdoor)
}
CN2D
Connector to the indoor
power board (CN2S)
(12.5~13.7V DC)
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
–
}
+
+
CN3C
Transmission
(Indoor/outdoor)
(0~24V DC)
–
CN22
Remote controller
connecting wire
(10.4~14.6V DC)
CN20
Room temperature
thermistor (TH1)
CN21
Pipe temperature
thermistor/Liquid
(TH2)
CN29
Condenser/evaporator
temperature
thermistor (TH5)
CND
Power
supply input
(220~240V AC)
FUSE
(6.3A 250V)
CN31
Drain sensor (DS)
CNDK
Connect to the indoor
power board (CNSK)
(220~240V AC)
CN90
Connect to the wireless
remote controller board
(CNB)
CNP
Drain-pump output
(DP)
(220~240V AC)
CN41
Connector
(HA terminal-A)
CN6V
Vane motor output
(MV)
CNC
Dew prevention
heater (H2)
(220~240V AC)
CN105
(CN92)
CN51
Centrally control
-2 : Control signal
13V pulse input (
: +)
- : Operation indicator
13VDC (
: +)
3-5 : Malfunction indicator
13VDC (
FAN
Fan motor output
CN2L
Connector (LOSSNAY)
SW3
Mode selection
OC320G
: +)
SWE
SW2
Emergency operation Capacity setting
23
Jumper connector
J11~J15
Unit setting
8-6. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE
Each function is controlled by the dip switch on control P.C. board.
Model setting and capacity setting are memorised in the nonvolatile memory of the indoor controller board.
The black square (■) indicates a switch position.
Jumper wire
Setting by the dip switch and jumper wire
Functions
Setting
Model
SW2
Capacity
setting
SLZ-KA25VA(L)
SLZ-KA25VAL2
SLZ-KA35VA(L)
SLZ-KA50VA(L)
Dip switch
SW3
Function
setting
Remarks
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
ON
OFF
ON
OFF
ON
OFF
Action by switch opration
ON
OFF
Function
SW3-1
Power failure
automatic recovery
SW3-2
SW3-3
OFF
ON
Set temperature in
heating mode (4 deg up)
Available
Not available
Fan speed when the
thermostat is OFF
(during heating mode)
Extra low
Stop
Not available
Available
SW3-4
SW3-5*
SW3 function
• Function setting becomes effective when the Dip switch SW3-5 is ON.
* Switch off SW3-5 when the function setting is done by wired remote controller.
OC320G
24
<Initial setting>
SW3
1 2 3 4 5
ON
OFF
8-7. TROUBLE CRITERION
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA25VAL2.TH
OF MAIN PARTS
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
Parts name
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
Check method and criterion
Room temperature
thermistor
(TH1)
Measure the resistance with a tester.
(Parts temperature 10°C ~ 30°C)
Pipe temperature
thermistor/liquid
(TH2)
Condenser/evaporator
temperature thermistor
(TH5)
Normal
Abnormal
4.3k~9.6k"
Opened or short-circuited
Measure the resistance between the terminals with a tester.
(Coil wiring temperature 10°C ~ 30°C)
Indoor fan motor
(MF)
Normal
BLK BLU YLW BRN RED ORN
WHT
P : Thermal fuse 141 ± 3°C
Vane motor (MV)
White 4
KA35VA(L)
KA25VAL2
KA50VA(L)
WHT-BLK
386~428"
373~413"
308~341"
BLK-BLU
81~91"
155~172"
135~151"
Opened or
short-circuited
BLU-YLW
28~32"
44~49"
44~49"
BRN-RED
157~174Ÿ
302~335"
293~324"
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20°C ~ 30°C)
Connector
M
Red — Blue
Red 1
Blue
Normal
Abnormal
300"
Open or short
Red — Yellow
Orange 2
5
Abnormal
KA25VA(L)
P
3
Yellow
Drain pump (DP)
Red — Orange
Red — White
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20°C ~ 30°C)
Yellow
1
Normal
Abnormal
2
290"
Open or short
Yellow
Drain sensor (DS)
1
2
3
OC320G
Measure the resistance between the terminals with a tester.
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(At the ambient temperature 0°C ~ 60°C)
Normal
Abnormal
0.6k"~6.0k"
Open or short
25
(Refer to the next page for a detail.)
<Thermistor Characteristic graph>
Thermistor for
lower temperature
< Thermistor for lower temperature >
•Room temperature thermistor (TH1)
•Pipe temperature thermistor/liquid (TH2)
•Condenser/evaporator temperature
thermistor (TH5)
50
40
Rt=15exp { 3480(
0˚C
10˚C
20˚C
25˚C
30˚C
40˚C
1
273+t
Resistance (k)
Thermistor R0=15kΩ ± 3%
Fixed number of B=3480 ± 2%
1 )}
273
15kΩ
9.6kΩ
6.3kΩ
5.2kΩ
4.3kΩ
3.0kΩ
30
20
10
0
Thermistor for
drain sensor
10
8
1 )}
273
7
Resistance (k)
0˚C
10˚C
20˚C
25˚C
30˚C
40˚C
60˚C
1
273+t
< Thermistor for drain sensor >
9
Thermistor R0=6.0kΩ ±5%
Fixed number of B=3390 ± 2%
Rt=6exp { 3390(
-20 -10 0 10 20 30 40 50
Temperature ()
6.0kΩ
3.9kΩ
2.6kΩ
2.2kΩ
1.8kΩ
1.3kΩ
0.6kΩ
6
5
4
3
2
1
0
OC320G
26
-20
0
20 40 60
Temperature ()
80
9
4-WAY AIR FLOW SYSTEM
9-1. FRESH AIR INTAKE (LOCATION FOR INSTALLATION)
At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required.
Fresh air intake
Detail drawing of fresh air intake
25
:100
:73.4
Cut out hole
118
3-:2.8 hole
Burring hole
12
0
0
12
Ceiling surface
Refrigerant pipe
Electrical Box
Drain pipe
9-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
SLZ-KA25VA(L).TH
SLZ-KA35VA(L).TH
SLZ-KA50VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA35VA(L)1.TH
SLZ-KA50VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VALR3.TH
How to read curves
2.5
1
Curve in the
left graphs
0
Q
-50
-100
Q…Designed amount of fresh air intake
<m3/min>
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q
<Pa>
…
B Forced static pressure at air conditioner inlet with air flow amount Q
<Pa>
C…Static pressure of booster fan with
air flow amount Q
<Pa>
D … Static pressure loss increase
amount of fresh air intake duct system for air flow amount Q
<Pa>
E…Static pressure of indoor unit with
air flow amount Q
<Pa>
Qa…Estimated amount of fresh air
3
intake without D
<m /min>
Duct characteristics
at site
A
2.0
Air flow : Q [m3/min]
3.0 3.5
C
Static pressure : P [Pa]
50
0.5 1.0 1.5
0
B
Taking air into the unit
C
A
2
E
-150
-200
Q
-250
D
3
A
-300
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
Q
Qa
9-3. OPERATION IN CONJUNCTION WITH DUCT FAN (BOOSTER FAN)
● Whenever the indoor unit operates, the
duct fan operates.
(1) Connect the optional multiple
remote controller adapter(PACSA88HA-E) to the connector CN51
on the indoor controller board.
(2) Drive the relay after connecting the
12V DC relay between the Yellow
and Orange connector wires.
Use a relay of 1W or smaller.
MB: Electromagnetic switch power
relay for duct fan.
X: Auxiliary relay (12V DC LY-1F)
CN51
on
indoor unit
board
5
~
Yellow
1
Connector (5P)
Indoor unit side
Red
Brown
Orange
Multiple remote
controller adapter
PAC-SA88HA-E
+
MB
Installation at site
Be sure to secure insulation
material by tape, etc.
Indoor controller board
Multiple remote
controller adapter
PAC-SA88HA-E
Distance between indoor
controller board and relay
must be within 10m.
CN51(WHT)
CN51
OC320G
Green
Be sure to secure insulation
material by tape, etc.
27
9-4. FIXING HORIZONTAL VANE
Horizontal vane of each air outlet can be fixed according to the environment where it is installed.
Setting procedure
1) Turn off a main power supply (Turn off a breaker).
2) Remove the vane motor connector in the direction of the arrow shown below with pressing the unlocking button as in the
figure below.
Insulate the disconnected connector with the plastic tape.
Vane motor
Vane motor
Connector
Unlocking button
Horizontal vane
3) Set the vertical vane of the air outlet by hand slowly within the range in the table below.
Measured standard
position of the grille
Horizontal vane
<Set range>
Standard of
horizontal position
Level 30°
(Min.)
Downward 45°
Downward 55°
Downward 70°
(Max.)
Dimension A (mm)
21
25
28
30
* Dimension between 21 mm and 30 mm can be arbitrarily set.
Caution
.
Do not set the dimension out of the range.
Erroneous setting could cause dew drips, smudge on ceiling or malfunction of unit.
OC320G
28
10
DISASSEMBLY PROCEDURE
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
SLZ-KA50VALR3.TH
Be careful when removing heavy parts.
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
1. Removing the air intake grille
(1) Slide the knob of air intake grille to the direction of the
arrow to open the air intake grille.
(2) Remove the string hook from the panel to prevent the grille
from dropping.
(3) Slide the hinge of the intake grille to the direction of the
arrow 2h and remove the air intake grille.
Figure 1
Air intake grille
Grille
Air intake grille knob
2. Removing the fan guard
(1) Open the air intake grille.
(2) Remove the 3 screws of fan guard.
Photo 1
Fan guard
Screws
Air intake grille
3. Removing the panel
(1) Remove the air intake grille. (Refer to procedure 1)
Corner panel (See Figure 2)
(1) Remove the screw of the corner.
(2) Slide the corner panel to the direction of the arrow , and
remove the corner panel.
Panel (See Photo 2)
(1) Disconnect the connector that connects with the unit.
(2) Remove the 2 screws from the panel and loose another
2 screws, which are fixed to the oval hole, have different
diameter.
(3) Rotate the panel a little to remove the screws. (Slide the
panel so that the screw comes to a larger diameter of the
oval hole, which has 2 different diameters.)
Figure 2
Corner
Screw panel
Photo 2
Screws
Connectors
Screws
Panel
Photo 3
4. Removing the electrical parts
(1) Remove the 2 screws and the control box cover.
<Electrical parts in the control box>
• Indoor controller board (I.B)
• Terminal block (TB4)
• Indoor power board (P.B)
Indoor power board (P.B)
Indoor controller board
(I.B)
OC320G
Panel
Corner
panel
29
Terminal block
(TB4)
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
5. Removing the room temperature thermistor (TH1)
(1) Remove the panel. (Refer to procedure 3)
(2) Pull out the room temperature thermistor from the drain
pan.
(3) Remove the 2 screws fixed to the control box cover, and
remove the control box cover.
(4) Remove the connector (CN20) from the indoor controller
board, and disconnect the room temperature thermistor.
Photo 4
Connectors
Control box
Drain plug
Screw
Screw
Room
temperature
thermistor
(TH1)
6. Removing the drain pan
(1) Remove the panel. (Refer to procedure 3)
(2) Remove the room temperature thermistor and the 2 lead
wires held with fastener; wireless controller board relay
connector (9P red) and panel relay connector (10P white).
(3) Remove the 4 screws fixed to the drain pan, and remove
the drain pan.
(4) Remove the fan guard. (Refer to procedure 2)
7. Removing the pipe temperature thermistor/liquid (TH2)
and condenser/evaporator temperature thermistor (TH5)
(1) Remove the panel. (Refer to procedure 3)
(2) Remove the drain pan. (Refer to procedure 6)
(3) Disconnect the indoor coil thermistor from the holder.
(4) Remove the 3 screws fixed to the piping cover, and remove
the piping cover. (See Photo 9)
(5) Remove the 2 screws fixed to the control box cover, and
remove the control box cover.
Drain pan
Screw
Screw
Fan guard
Control box
Photo 5
Pipe temperature thermistor/liquid (TH2)
(6) Remove the connector (CN21) from the indoor controller
board, and disconnect the pipe temperature thermistor/liquid.
Condenser/evaporator temperature thermistor (TH5)
(6) Remove the connector (CN29) from the indoor controller
board, and disconnect the condenser/evaporator temperature
thermistor.
Pipe temperature
thermistor/liquid
(TH2)
8. Removing the fan motor (MF)
(1) Remove the panel. (Refer to procedure 3)
(2) Remove the drain pan. (Refer to procedure 6)
(3) Remove the nut and the washer from the turbo fan, and
remove the turbo fan.
(4) Remove the 2 screws fixed to the control box cover, and
remove the control box cover.
(5) Disconnect the connectors of the (fan 1) and the (fan 2)
from the indoor controller board.
(6) Remove the 3 screws fixed to the piping cover, and remove
the piping cover. (See Photo 9)
(7) Remove the 6 screws fixed to the flat plate, and remove
the flat plate.
(8) Disconnect the lead wires to the direction of the fan motor,
and remove the 3 nuts of the fan motor.
Photo 6
Flat plate
Screws
30
Screw
Nut
Fan motor
(MF)
Nut
Lead
wires
Screws
Screw
OC320G
Condenser/evaporator
temperature thermistor
(TH5)
Nut
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
9. Removing the drain pump (DP) and drain sensor (DS)
(1) Remove the panel. (Refer to procedure 3 )
(2) Remove the drain pan. (Refer to procedure 6)
(3) Remove the 2 screws fixed to the control box cover, and
remove the control box cover.
(4) Remove the connectors of the (CNP) and the (CN31)
from the indoor controller board.
(5) Remove the 1 screw fixed to the cover, and remove the
cover.
(6) Disconnect the lead wires to the direction of the drain
pump. (See Photo 7)
(7) Remove the 3 screws of the drain pump.
(8) Cut the drain hose band, pull out the drain hose from the
drain pump.
(9) Pull out the drain pump.
(10) Remove the drain sensor and the holder.
Photo 7
Screw
Cover
Control
box
Lead wires
Photo 8
Drain sensor (DS)
Drain pump (DP)
Drain
hose
Screws
Screw
Fixing band
10. Removing the heat exchanger
(1) Remove the panel. (Refer to procedure 3 )
(2) Remove the drain pan. (Refer to procedure 6)
(3) Remove the nut and the washer from the turbo fan, and
remove the turbo fan.
(4) Remove the 2 screws fixed to the control box cover, and
remove the control box cover.
(5) Disconnect the connector of the (fan) from the indoor controller board.
(6) Remove the 3 screws fixed to the piping cover, and remove
the piping cover. (See Photo 9)
(7) Remove the pipe temperature thermistor/liquid and
condenser/evaporator temperature thermistor. (Refer to
procedure 7)
(8) Disconnect the lead wires to the direction of the fan motor.
(9) Remove the 1 coil support screw, the 2 inside coil screws
(See Photo 10), and the 4 outside coil screws (See Photo 9)
from the heat exchanger, and remove the heat exchanger.
Control box
Photo 9
Screws of
piping cover
Coil
screws
Coil
screws
Piping cover
Lead wires
Control box
Photo 10
Coil screws
Coil
support
Coil
support
screw
Heat exchanger
OC320G
31
11
PARTS LIST (Non-RoHS compliant)
PANEL PARTS
SLP-2AL(FOR SLZ-KA25/35/50VAL.TH)
SLP-2AA(FOR SLZ-KA25/35/50VA.TH)
10
9
8
3
2
7
1
4
5
6
Q'ty/unit
No.
Parts No.
Parts name
Specification
SLP-2AL SLP-2AA
103
003 AIR OUTLET GRILLE
E07
158
003 AIR OUTLET GRILLE
2 E07
103
317 WIRELSS REMOTE CONTROL BOARD
1
3 E07
103
037 AUTO VANE
4
4
4 E07
103
975 CORNER PANEL
4
4
5 E07
103
100 AIR FILTER
1
1
6 E07
103
010 INTAKE GRILLE
1
1
7 E07
103
303 VANE MOTOR
4
4
8 E07
103
044 VANE BUSH
8
8
9 E07
103
031 GEAR (V)
4
4
10 E07
103
032 GEAR (M)
4
4
OC320G
Wiring RecomDiagram mended
Symbol
Q'ty
1
E07
1
Remarks
(Drawing No.)
1
32
W.B
MV
PARTS LIST (Non-RoHS compliant)
ELECTRICAL PARTS
SLZ-KA25VAL.TH SLZ-KA25VA.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH
5
4
1
No.
Parts No.
2
Parts name
1 E07
006
382 FUSE
E07
162
447 INDOOR CONTROLLER BOARD
2 E07
164
447 INDOOR CONTROLLER BOARD
Q'ty/unit
SLZ-KA
Specification
25 35 50 25 35 50
VAL.TH VA.TH
1 1 1 1 1 1
250V 6.3A
1
1
1
166
447 INDOOR CONTROLLER BOARD
162
375 TERMINAL BLOCK
3P(S1, S2, S3)
4 E07
156
375 TERMINAL BLOCK
2P(1, 2)
5 E07
154
440 INDOOR POWER BOARD
1 1
6 E02
095
350 INDOOR FAN CAPACITOR 1.5+/ 440VAC
1 1
33
1 1
Remarks
(Drawing No.)
Wiring
RecomDiagram mended
Symbol
Q'ty
FUSE
I.B
1
I.B
1
I.B
1 1
1
TB4
1 1
1
TB15
1
1 1
1
P.B
1
1 1
1
C1
1
E07
3 E07
OC320G
3
UNIT
TO OUTDOOR
6
1
PARTS LIST (Non-RoHS compliant)
FUNCTIONAL PARTS
SLZ-KA25VAL.TH
SLZ-KA35VAL.TH
SLZ-KA50VAL.TH
SLZ-KA25VA.TH
SLZ-KA35VA.TH
SLZ-KA50VA.TH
1
23
22
3
2
22
3
21
4
20
5
19
18
17
6
16
15
7
ON/OFF
8
AUTO COOL
HEAT DRY
TOO
WARM
TOO
COOL
FAN
SELECT
VANE
TIME
24
MODE
RESET
9
10
25
11
TEMP.
ON/OFF
26
12
27
13
OC320G
14
34
PARTS LIST (Non-RoHS compliant)
FUNCTIONAL PARTS
1 E07
104
290 BASE
Q'ty/unit
SLZ-KA
25 35 50 25 35 50
VAL.TH VA.TH
1 1 1 1 1 1
2 E07
104
124 DRUM-1
1 1
1
1 1
1
3 E07
104
808 LEG-1
2 2
2
2 2
2
4 E07
105
124 DRUM-2
1 1
1
1 1
1
1
No.
Parts name
Parts No.
Specification
Remarks
(Drawing No.)
Wiring RecomDiagram mended
Symbol
Q'ty
1
E07
140
620 INDOOR HEAT EXCHANGER
5 E07
141
620 INDOOR HEAT EXCHANGER
E07
142
620 INDOOR HEAT EXCHANGER
6 E07
104
105 MOTOR MOUNT
E07
162
300 INDOOR FAN MOTOR
PK6V15-LD
7 E07
164
300 INDOOR FAN MOTOR
PK6V20-LL
E07
166
300 INDOOR FAN MOTOR
PK6V20-LM
8 E07
104
816 FLAT PLATE
1 1
1
1 1
1
9 E07
104
502 TURBO FAN
1 1
1
1 1
1
10 E07
104
097 SPL WASHER
1 1
1
1 1
1
11 E07
104
700 DRAIN PAN
1 1
1
1 1
1
12 E07
154
308 ROOM TEMPERATURE THERMISTOR
1 1
1
1 1
1
13 E07
104
520 FAN GUARD
1 1
1
1 1
1
14 E07
104
524 DRAIN PLUG
1 1
1
1 1
1
15 E07
104
648 COIL SUPPORT
1 1
1
1 1
1
1 1
1
1 1
1
TH5
TH2
1
1
1
1
3 3
CONDENSER / EVAPORATOR
TEMPERATURE THERMISTOR
3
3 3
3
1
1
MF
1
1
MF
1
1
16 E07
154
309
17 E07
154
307 PIPE TEMPERATURE THERMISTOR / LIQUID
1 1
1
1 1
1
18 E07
104
702 DRAIN HOSE
1 1
1
1 1
1
19 E07
104
266 DRAIN SENSOR
1 1
1
1 1
1
20 E07
104
241 SENSOR HOLDER
1 1
1
1 1
1
21 E07
104
355 DRAIN PUMP
1 1
1
1 1
1
22 E07
104
809 LEG-2
2 2
2
2 2
2
23 E07
154
006 COVER (DRUM)
1 1
1
1 1
1
24 E07
140
426 WIRELESS REMOTE CONTROLLER
1 1
1
25 E02
527
083 REMOTE CONTROLLER HOLDER
1 1
1
26 E07
159
426 REMOTE CONTROLLER
1 1
1
27 E07
018
089 REMOTE CONTROLLER CABLE
1 1
1
OC320G
35
3PCS/SET
MF
TH1
DS
DP
W.R
12
RoHS PARTS LIST (RoHS compliant)
FUNCTIONAL PARTS
SLZ-KA25VA(L).TH
SLZ-KA35VA(L).TH
SLZ-KA50VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA35VA(L)1.TH
SLZ-KA50VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA25VAL2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VALR3.TH
23
22
1
3
2
22
21
3
4
20
5
19
18
17
6
16
15
7
8
ON/OFF
AUTO COOL
HEAT DRY
TOO
WARM
TOO
COOL
FAN
SELECT
VANE
TIME
24
MODE
9
RESET
10
25
11
TEMP.
12
ON/OFF
26
13
14
27
OC320G
36
RoHS PARTS LIST (RoHS compliant)
No.
RoHS
FUNCTIONAL PARTS
Parts name
Parts No.
Specification 25 35 50
VAL.TH
VAL1.TH
VALR2.TH
Q'ty/unit
SLZ-KA
Wiring
25 35 50
25
35 50
Remarks Diagram
VA.TH
(Drawing No.) Symbol
VA1.TH VAL2.TH VALR3.TH
VAR2.TH
1 G E17104290 BASE
1 1
1
1 1
1
1
1
1
2 G E17104124 DRUM-1
1 1
1
1 1
1
1
1
1
3 G E17104808 LEG-1
2 2
2
2 2
2
2
2
2
4 G E17105124 DRUM-2
1 1
1
1 1
1
1
1
1
1
1
G E17140620 INDOOR HEAT EXCHANGER
1
1
5 G E17141620 INDOOR HEAT EXCHANGER
1
G E17142620 INDOOR HEAT EXCHANGER
1
1
6 G E17104105 MOTOR MOUNT
3 3
G E17162300 INDOOR FAN MOTOR
PK6V15-LD
7 G E17164300 INDOOR FAN MOTOR
PK6V20-LL
G E17166300 INDOOR FAN MOTOR
PK6V20-LM
3
3 3
3
1
1
1
1
3
1 1
1
G E17756502 TURBO FAN
1 1
1
1 1
1
G E17766502 TURBO FAN
1 1
1
1
1 1
MF
1
1
1
G E17439097 SPL WASHER
3
MF
1 1
10
3
1
1
8 G E17104816 FLAT PLATE
9
1
1
1
1
1
1
1
1
1
1
1
MF
1
G E17766097 SPL WASHER
11 G E17104700 DRAIN PAN
1 1
1
1 1
1
1
1
1
12 G E17154308 ROOM TEMPERATURE THERMISTOR
1 1
1
1 1
1
1
1
1
13 G E17104520 FAN GUARD
1 1
1
1 1
1
1
1
1
14 G E17104524 DRAIN PLUG
1 1
1
1 1
1
1
1
1
15 G E17104648 COIL SUPPORT
1 1
1
1 1
1
1
1
1
1 1
1
1 1
1
1
1
1
TH5
17 G E17154307 PIPE TEMPERATURE THERMISTOR / LIQUID
1 1
1
1 1
1
1
1
1
TH2
18 G E17104702 DRAIN HOSE
1 1
1
1 1
1
1
1
1
19 G E17104266 DRAIN SENSOR
1 1
1
1 1
1
1
1
1
20 G E17104241 SENSOR HOLDER
1 1
1
1 1
1
1
1
1
21 G E17104355 DRAIN PUMP
1 1
1
1 1
1
1
1
1
22 G E17104809 LEG-2
2 2
2
2
2
2
1
1
1
1
16 G E17154309
CONDENSER / EVAPORATOR
TEMPERATURE THERMISTOR
2 2
2
23 G E17154006 COVER (DRUM)
1 1
1
24 G E17140426 WIRELESS REMOTE CONTROLLER
1 1
1
1
1
1
25 G E12527083 REMOTE CONTROLLER HOLDER
1 1
1
1
1
1
1 1
26 G E17159426 REMOTE CONTROLLER
1 1
1
27 G E17018089 REMOTE CONTROLLER CABLE
1 1
1
OC320G
37
TH1
DS
DP
W.R
RoHS PARTS LIST (RoHS compliant)
PANEL PARTS
SLP-2AL (FOR SLZ-KA25/35/50VAL.TH)
SLP-2AA (FOR SLZ-KA25/35/50VA.TH)
SLP-2ALW (FOR SLZ-KA25/35/50VAL1.TH, SLZ-KA25/35/50VALR2.TH)
(FOR SLZ-KA25VAL2.TH, SLZ-KA35/50VALR3.TH)
SLP-2AAW (FOR SLZ-KA25/35/50VA1.TH SLZ-KA25/35/50VAR2.TH)
10
9
8
3
2
7
1
4
5
No.
RoHS
6
Q'ty/unit
Parts No.
Parts name
Specification
AL
G E17
103
003 AIR OUTLET GRILLE
G E17
158
003 AIR OUTLET GRILLE
G E17
423
003 AIR OUTLET GRILLE
G E17
424
003 AIR OUTLET GRILLE
2 G E17
103
317 WIRELSS REMOTE CONTROL BOARD
1
G E17
103
037 AUTO VANE
4
G E17
423
037 AUTO VANE
G E17
103
975 CORNER PANEL
1
3
4
Remarks
(Drawing No.)
SLP-2
AA ALW AAW
1
1
1
1
4
W.B
1
4
4
4
4
4
1
1
1
1
4
G E17
423
975 CORNER PANEL
5 G E17
103
100 AIR FILTER
1
1
G E17
103
010 INTAKE GRILLE
1
1
G E17
423
010 INTAKE GRILLE
7 G E17
103
303 VANE MOTOR
4
4
4
4
8 G E17
103
044 VANE BUSH
8
8
8
8
9 G E17
103
031 GEAR (V)
4
4
4
4
10 G E17
103
032 GEAR (M)
4
4
4
4
6
OC320G
Wiring RecomDiagram mended
Symbol
Q'ty
38
MV
RoHS PARTS LIST (RoHS compliant)
ELECTRICAL PARTS
SLZ-KA25VA(L).TH
SLZ-KA25VA(L)1.TH
SLZ-KA25VA(L)R2.TH
SLZ-KA35VA(L).TH
SLZ-KA35VA(L)1.TH
SLZ-KA35VA(L)R2.TH
SLZ-KA50VA(L).TH
SLZ-KA50VA(L)1.TH
SLZ-KA50VA(L)R2.TH
6
5
1
1
3
G E17 006 382 FUSE
Q'ty/unit
Wiring RecomRemarks
SLZ-KA
Diagram mended
Specification
25 35 50 25 35 50 25 35 50 25 35 50 (Drawing No.) Symbol Q'ty
VAL(1).TH VA(1).TH VALR2.TH VAR2.TH
FUSE
250V 6.3A 1 1 1 1 1 1
G E17 250 382 FUSE
250V 6.3A
RoHS
No.
2
4
UNIT
TO OUTDOOR
7
Parts No.
Parts name
1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1
2 G E12 661 385 VARISTOR
1
G E17 162 447 INDOOR CONTROLLER BOARD
1
3 G E17 164 447 INDOOR CONTROLLER BOARD
1
1
ZNR
I.B
1
1
1
1
G E17 166 447 INDOOR CONTROLLER BOARD
1
1
1
FUSE
I.B
1
I.B
4 G E17 162 375 TERMINAL BLOCK
3P(S1,S2,S3) 1 1 1 1 1 1 1 1 1 1 1 1
TB4
5 G E17 156 375 TERMINAL BLOCK
2P(1,2)
1 1 1
TB15
1 1 1
1 1 1 1 1 1 1 1 1 1 1 1
P.B
7 G E12 095 350 INDOOR FAN CAPACITOR 1.5+/ 440VAC 1 1 1 1 1 1 1 1 1 1 1 1
C1
6 G E17 154 440 INDOOR POWER BOARD
OC320G
39
RoHS PARTS LIST (RoHS compliant)
ELECTRICAL PARTS
SLZ-KA25VAL2.TH
SLZ-KA35VALR3.TH
SLZ-KA50VALR3.TH
4
No.
RoHS
1
Parts No.
3
UNIT
TO OUTDOOR
5
2
Parts name
1 G E17 250 382 FUSE
Q'ty/unit
SLZ-KA
Specification
50
25
35
VALR3.TH
VAL2.TH
1
1
1
250V 6.3A
2 G E17 851 447 INDOOR CONTROLLER BOARD
Wiring Recom-
Remarks
Diagram mended
(Drawing No.) Symbol Q'ty
FUSE
1
1
1
I.B
1
1
1
TB4
4 G E17 852 440 INDOOR POWER BOARD
1
1
1
P.B
5 G E12 095 350 INDOOR FAN CAPACITOR 1.5+/ 440VAC
1
1
1
C1
3 G E17 162 375 TERMINAL BLOCK
3P(S1,S2,S3)
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
Copyright 2005 MITSUBISHI ELECTRIC CORPORATION
Distributed in Aug. 2013 No.OC320 REVISED EDITION-G
Distributed in Apr. 2013 No.OC320 REVISED EDITION-F
Distributed in Oct. 2012 No.OC320 REVISED EDITION-E
Distributed in Feb. 2012 No.OC320 REVISED EDITION-D
Distributed in Dec. 2011 No.OC320 REVISED EDITION-C
Distributed in Jul. 2007 No.OC320 REVISED EDITION-B PDF 7
Distributed in Sep. 2006 No.OC320 REVISED EDITION-A PDF 7
Distributed in Feb. 2005 No.OC320 PDF 8
Made in Japan
New publication, effective Aug. 2013
Specifications are subject to change without notice.

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