Mitsubishi Electric SLZ-KA25VA.TH 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·····························10
5. REFRIGERANT SYSTEM DIAGRAM ·······11
6. TROUBLESHOOTING ························12
7. 4-WAY AIR FLOW SYSTEM···············19
8. DISASSEMBLY PROCEDURE ···········21
9. PARTS LIST········································24
No. OC320
REMOTE CONTROLLER
ON/OFF
RESET
TOO
WARM
TOO
COOL
MODE
AUTO COOL
DRY HEAT
FAN
VANE
SELECT
TIME
Indoor unit
[Model names] [Service Ref.]
SLZ-KA25VA SLZ-KA25VA.TH
SLZ-KA35VA SLZ-KA35VA.TH
SLZ-KA50VA SLZ-KA50VA.TH
SLZ-KA25VAL SLZ-KA25VAL.TH
SLZ-KA35VAL SLZ-KA35VAL.TH
SLZ-KA50VAL SLZ-KA50VAL.TH
Note :
•This manual does not cover
outdoor units. When servicing
outdoor units, please refer
to the service manual
No.OC322 together with this
manual.
INDOOR UNIT
Model name
indication
ON/OFF
TEMP.
SLZ-KA25,35,50VAL.TH SLZ-KA25,35,50VA.TH
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2
1PART NAMES AND FUNCTIONS
ON/OFF
RESET
TOO
WARM
TOO
COOL
MODE
AUTO COOL
DRY HEAT
FAN
VANE
SELECT
TIME
h
ON / OFF button
Pushing button starts
operation. Pushing again
stops operation.
●Avoid operation of buttons with fingernails or other sharp objects. Sharp objects may scratch remote controller.
Attention :
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grille
Filter
Remove dust and pollutants
from inhaled air
Horizontal Air Outlet
Sets airflow horizontal automatically
during cooling or dehumidifying.
Air Intake
Inhales air from room.
SET TEMPERATURE
button
SET TEMPERATURE
button sets and any
desired room temperature.
MODE SELECT button
This button is used to change
between auto, cooling,
heating and drying operation
modes. (SLZ)
This button is used to set
fan speed to low, medium
or high.
TIMER SELECT button
Used for selecting timed
starting or stopping.
FAN SPEED button
Used to change the airflow
direction.
VANE CONTROL button
Wireless remote controller
SLZ-KA25VAL.TH
SLZ-KA35VAL.TH
SLZ-KA50VAL.TH
Indoor Unit
SLZ-KA25VAL.TH SLZ-KA25VA.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH
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3
Wired remote controller
● Operation buttons [ PAR-21MAA ]
Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
SLZ-KA25VA.TH
SLZ-KA35VA.TH
SLZ-KA50VA.TH
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.
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4
Caution
●Only the Power display lights when the unit is stopped and power supplied to the unit.
●When power is turned ON for the first time the (Centrally controlled) display appears to go off momentarily but this is not a
malfunction.
●“NOT AVAILABLE” is displayed when the Air speed button are pressed.This indicates that this room unit is not equipped
with the fan direction adjustment function and the louver function.
●When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indica-
tion (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.
●Display
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
˚F˚C
˚F˚C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is sup-
ported.
“Centrally Controlled” indicator
Indicates that operation of the re-
mote controller has been prohib-
ited by a master controller.
“Timer Is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, shows the time
remaining.
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
Comes on when it is time to clean the
filter.
Timer indicators
The indicator comes on if the corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Displayed if the airflow is set to
weak and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow di-
rection also changes.
Room Temperature display
Shows the room temperature.
Louver display
Indicates the action of the swing
louver. Does not appear if the
louver is stationary.
(Power On indicator)
Indicates that the power is on.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
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5
SPECIFICATIONS
2
SLZ-KA25VAL.TH
SLZ-KA25VA.TH SLZ-KA35VAL.TH
SLZ-KA35VA.TH
Indoor model
Function
Power supply Single phase
230V, 50Hz
600/540/480
10
0.35
75
0.014
0.19
PK6V15-LD
4
37/31/28
650/530/480
3
10
10
10
Cooling
90
Heating
93
Single phase
230V, 50Hz
660/540/480
10
0.40
85
0.014
0.26
PK6V20-LL
4
38/33/29
690/570/510
3
10
10
10
Cooling
94
Heating
94
Air flow
(High/Medium/Low)
Power outlet
Running current ✽1
Power input Rated frequency
Dew prevention heater
Power factor ✽1
Fan motor current ✽1
Model
Winding
resistance (at20:)
Width
Height
Depth
Weight
Air direction
Sound level(High/Medium/Low)
Fan speed(High/Medium/Low)
Fan speed regulator
Thermistor TH1(at25:)
Thermistor TH2(at25:)
Thermistor TH5(at25:)
K/h
A
A
W
(kW)
%
A
"
mm(in)
mm(in)
mm(in)
kg
dB(A)
rpm
k"
k"
k"
Electrical data
Fan motor
Special remarks
Capacity
Dimensions
WHT-BLK : 407 BLK-BLU : 86
BLU-YLW : 30
BRN-RED : 165
UNIT : 570(22-7/16) PANEL : 650(25-9/16)
UNIT : 208(8-3/16) PANEL : 20(13/16)
UNIT : 570(22-7/16) PANEL : 650(25-9/16)
UNIT : 16.5 PANEL : 3
WHT-BLK : 393 BLK-BLU : 164
BLU-YLW : 47
BRN-RED : 319
SLZ-KA50VAL.TH
SLZ-KA50VA.TH
Single phase
230V, 50Hz
660/540/480
20
0.65
85
0.014
0.27
PK6V20-LM
4
39/34/30
710/590/530
3
10
10
10
Cooling
97
Heating
97
WHT-BLK : 325 BLK-BLU : 143
BLU-YLW : 47
BRN-RED : 309
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor D.B. 27:W.B. 19:
Outdoor D.B. 35:W.B. 24:
Heating : Indoor D.B. 20:W.B. 15:
Outdoor D.B. 7:W.B. 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency.
1.5+ 440V
250V 6.3A
MSBPC20 12V 250"
TO OUTDOOR UNIT : 3P TO WIRED REMOTE CONTROLLER : 2P (SLZ-KA25/35/50VA.TH)
145:i2:
240V AC 15W
INDOOR UNIT
Item Model
Indoor fan capacitor
Fuse
Vane motor
Terminal block
Indoor fan motor thermal fuse
Cord Heater
SLZ-KA25VAL.TH SLZ-KA35VAL.TH SLZ-KA50VAL.TH
(C1)
(FUSE)
(MV)
(TB)
(H2)
SLZ-KA25VA.TH SLZ-KA35VA.TH SLZ-KA50VA.TH
Specifications and rating conditions of main electric parts
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6
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
SLZ-KA35VAL.TH
SLZ-KA35VA.TH High
Medium 38
SPL(dB)
33
LINE
<50Hz>
NOTCH
Low 29
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
SLZ-KA25VAL.TH
SLZ-KA25VA.TH High
Medium 37
SPL(dB)
31
LINE
<50Hz>
NOTCH
Low 28
NOISE CRITERION CURVES
UNIT
1.5m
MICROPHONE
CEILING
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
SLZ-KA50VAL.TH
SLZ-KA50VA.TH High
Medium 39
SPL(dB)
34
LINE
<50Hz>
NOTCH
Low 30
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.
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7
OUTLINES AND DIMENSIONS
3
Unit : mm
SLZ-KA25VAL.TH
SLZ-KA35VAL.TH
SLZ-KA50VAL.TH
SLZ-KA25VA.TH
SLZ-KA35VA.TH
SLZ-KA50VA.TH
SLZ-KA50VA(L)
SLZ-KA35VA(L)
SLZ-KA25VA(L)
Brand label
(Case of Wired remote controller)
Terminal block Terminal block
87
Suspension bolt M10 or 3/8 (procure locally)
1/4F
flared connection
{6.35mm
1/4F
flared connection
{6.35mm {9.52mm
flared connection
3/8F 1/2F
flared connection
Refrigerent pipe (liquid)
Refrigerent pipe (gas)
Models
{6.35mm
flared connection
1/4F
Refrigerent pipe (liquid) Refrigerent pipe
(gas)
{12.7mm {9.52mm
flared connection
3/8F
15~37 15~37
576~620
570
530
Grille
Fresh air intake
Drain pipe VP-25 connection (O.D. {32)
Vane motor
Drain hole
V/M
Air intake grille
55 35
35 55
Auto vane
Grille
Air intake hole
Air intake hole
Air outlet hole
Air outlet hole
301
301
Emergency operation switch(cooling)
Emergency operation switch(heating)
Operation lamp
DEFROST/STAND BY lamp
(WIRELESS PANEL)
Receiver
Detail drawing of fresh air intake
Ceiling surface
Cut out hole
{73.4
Burring hole
3- {2.8 hole
{100
118
25
120°
120°
377
377
650
650
Suspension bolt
lower edge
230
18248
Wiring entry
Ceiling surface
235
208
27 +5
0193
20
93
38~58
66121
17 202
56
57
31
Ceiling hole
Suspension bolt pitch
15~37 15~37576~620
420
570
335
199
352 335
Suspension bolt pitch
Ceiling hole
V/M
V/M
V/M
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8
WIRELESS REMOTE CONTROLLER
Installation area
• Area in which the remote controller is not exposed direct sunshine.
• Area in which there is no nearby heating source.
• 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
1Attach the remote controller holder to the desired location using two tapping screws.
2Place the lower end of the controller into the holder.
AWireless remote controller (Accessory)
BWall
CRemote controller holder (Accessory)
DFixing 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.
A
C
B
D
ON/OFF
RESET
TOO
WARM
TOO
COOL
MODE
AUTO COOL
DRY HEAT
FAN
VANE
SELECT
TIME
h
57 17.5
140
Unit : mm
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9
WIRED REMOTE CONTROLLER Unit : mm
130
120
19
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10
WIRING DIAGRAM
4
SLZ-KA25VAL.TH SLZ-KA25VA.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH
SWE
GRILLE
OFF
ON SW3
OFF 54321
ON
SW2
OFF 54321
ON
WHT
RED
RED
CNDK
(POWER
BOARD)
ZNR
X1
RED
ORN
YLW
YLW
BLU
BLU BLU
BLU
LED3
CN2L
CN32 CN51 CN41
(REMOCON)
BLU
TO OUTDOOR UNIT
S3
ORN
MF
MV
MV
MV
MV 5
5
5
5
H2
5
31
P.B
3
TB4S1
S2
TB15
1
2TO MA-REMOTE
CONTROLLER
DC8.7-13V
}
REMOTE
CONTROLLER
W.R
9
5
CN6V
(VANE)
GRN
BLU
WHT
ORN
RED
YLW
YLW
X5
X5 X4
X4 X7 X6
X6 X7
97531
C1
BLK
WHT
BLU
YLW
BRN
RED I.B
CNB
BZ
LED2
LED1
SW1
SW2
RU
W.B 9
CN22
1
(2 PHASE)
CN29
BLK
WHT
RED
(INTAKE)
(LIQUID)
CN31
3
CN20
CN21
1 1 2
2 1 2
2
1 2
DS TH5 TH1 TH2
X1
YLW
BLU
(D·U·M)
CNP
RED
(D·HEATER)
CNC 313131 CND
(POWER)
ORN
FUSE (CONTROL)
CN3C
BLU
31 31
LED1
1 2
1 2
TRANS
DC13.1V
CN2S(WHT)
AC220-240V
CNSK(RED)
WHT
BLK
2
1
(POWER
BOARD)
CN2D
WHT
LED2
* Case of wireress model
* Case of wired model
See fig:w1
MODELS
KA25
KA35
KA50
<fig:w1>
ON
OFF 12345
ON
OFF 12345
ON
OFF 12345
SW2
YLW
YLW
RED
ORN
YLW
WHT
BLU
1 7 4 5 10 8 92 3 6
DP
GRY
VLT
BLU
YLW
ORN
RED BRN
SKYBLU
PINK
WHT
(WIRELESS)
CN90
987654321
654321
(FAN)
FAN
WHT
BRN
RED
ORN
YLW
BLU
VLT
GRY
PINK
SKY BLU
1 2 3 4 5 6 7 8 9
(DRAIN)
WHT
wFor details on how to operate self-diagnosis
refer to the technical manuals etc.
:Connector, :Terminal (block).
1.Since the outdoor side electric wiring may change be sure to
check the outdoor unit electric wiring for servicing.
2.Indoor and outdoor connecting wires are made with polarities,make
wiring matching terminal numbers(S1,S2,S3).
NOTES:
3.Symbols used in wiring diagram above are,
SWITCH(COOLING ON/OFF)
LED(RUN INDICATOR)
SWITCH(HEATING ON/OFF)
LED(HOT ADJUST)
BUZZER
RECEIVING UNIT
WIRELESS REMOTE CONTROLLER BOARD
SW2
SW1
LED2
RU
LED1
BZ
W.B
H2
DP
DS
MV
MF FAN MOTOR
VANE MOTOR
DRAIN-UP MACHINE
DRAIN SENSOR
DEW PREVENTION HEATER
C1 CAPACITOR(FAN MOTOR)
FUSE(T6.3AL250V)
X7
X6
X5
X4
X1
ZNR
RELAY(FAN MOTOR Me)
RELAY(FAN MOTOR Hi)
RELAY(FAN MOTOR LL)
RELAY(FAN MOTOR Lo)
DRAIN PUMP/DEW PREVENTION HEATER
VARISTOR
SYMBOL NAME
SWITCH(CAPACITY CODE)
SW3
SW2
SWE SWITCH(EMERGENCY OPERATION)
SWITCH(MODE SELECTION)
TRANSMISSION(INDOOR-OUTDOOR)
LED1
LED2
LED3
POWER SUPPLY(I.B)
POWER SUPPLY(I.B)
CN51 CENTRALLY CONTROL
FUSE
P.B
CONNECTOR(HA TERMINAL-A)
CONNECTOR(REMOTE SWITCH)
CONNECTOR(LOSSNAY)
CN41
CN32
CN2L
INDOOR CONTROLLER BOARD
INDOOR POWER BOARD
I.B
NAMESYMBOL
TB4
TB15
TH1
TH2
TH5
TERMINAL BLOCK(INDOOR/OUTDOOR CONNECTING LINE)
TERMINAL BLOCK(REMOTE CONTROLLER
TRANSMISSION LINE)
ROOM TEMP.THERMISTOR
(0°C/15kΩ,25°C/5.4kΩDETECT)
PIPE TEMP.THERMISTOR/LIQUID
(0°C/15kΩ,25°C/5.4kΩDETECT)
COND./EVA.TEMP.THERMISTOR
(0°C/15kΩ,25°C/5.4kΩDETECT)
[LEGEND]
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11
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-KA25VAL.TH SLZ-KA25VA.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH
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12
TROUBLESHOOTING
6
6-1. Cautions on troubleshooting
(1) Before troubleshooting, check the followings:
1Check the power supply voltage.
2Check the indoor/outdoor connecting wire for mis-wiring.
(2) Take care the followings during servicing.
1Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then turn
off the breaker.
2When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the
components.
3When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
6-2. Self-check
6-2-1. Wired remote controller
1Turn on the power.
2Press the [CHECK] button twice.
3Set refrigerant address with [TEMP] button if system control is used.
4Press the [ON/OFF] button to stop the self-check.
˚C
˚C SIMPLE
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
B
C
A
E D
ACHECK button
BRefrigerant address
CTEMP. button
DIC:Indoor unit
OC:Outdoor unit
ECheck code
RESET
TOO TOO
COOL
AUTO COOL
DRY
HEAT
FAN
VANE
SELECT
TIME
ON/OFF
TOO
WARM
TOO
COOL
h
1Turn ON the power.
2During pressing both the MODE SELECT button and TOO COOL button on the
remote controller at the same time, press the RESET button.
3At first, release the RESET button.
4And release the other two buttons since all LCD in operation display section of the
remote controller is displayed after 3 seconds.
5Transmit the signal of remote controller, pressing OPERATE/STOP (ON/OFF)
button on the remote controller.
(The above procedure allows OPERATION INDICATOR lamp to indicate the fail-
ure-mode.)
6Transmit the signal of remote controller, pressing OPERATE/STOP (ON/OFF)
button to stop the self-check.
The following indication
applies regardless of shape
of the indicator
.
OPERATION INDICATOR lamp
6-2-2. Wireless remote controller
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13
[Output pattern A] Errors detected by indoor unit
[Output pattern B]
E9
*1If 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.
*2If 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.
OPERATION
INDICATOR
lamp flash
pattern
Beep Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 sec. On Approx. 3 sec. On 0.5 sec. On 0.5 sec. On 0.5 sec. On 0.5 sec. Off Approx. 2.5 sec. On Approx. 3 sec. On 0.5 sec. On 0.5 sec.
···Repeated
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”) Number of flashes/beeps in pattern indicates the check code in the following table
nth
1st 2nd 3rd 1st 2nd
Self-check
starts
(Start signal
received)
Beeper sounds
[Output pattern B]
OPERATION
INDICATOR
lamp flash
pattern
Beep Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 sec. On 0.5 sec. On 0.5 sec. On 0.5 sec. On
0.5 sec. Off
Approx. 2.5 sec. On 0.5 sec. On 0.5 sec.
···Repeated
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”) Number of flashes/beeps in pattern indicates the check code in the following table
nth
1st 2nd 3rd 1st 2nd
Self-check
starts
(Start signal
received)
Beeper sounds
• Refer to the following tables for details on the check codes.
[Output pattern A]
Beeper sounds/OPERATION
INDICATOR lamp flashes 1Check code Symptom Remark
(Number of times)
Wireless remote controller
Wired remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes 1Check code
(Number of times)
Wireless remote controller
Wired remote controller
1 P1 Intake sensor error
P9 Pipe (TH5) sensor error
2P2 Pipe (TH2) sensor error
3 E6,E7 Indoor/outdoor unit communication error
4 P4 Drain sensor error
5 P5 Drain pump error
6 P6 Freeing/Overheating safeguard operation
7 EE Communication error between indoor and outdoor units
8 P8 Pipe temperature error
9 E4, E5 Remote controller signal receiving error
10 –
11 ––
–
Errors detected by unit other than indoor unit (outdoor unit, etc.)
Symptom Remark
1Indoor/outdoor unit communication error
2(Transmitting error) (Outdoor unit)
3Open/short of outdoor unit thermistors
4Compressor overcurrent interruption (When compressor locked)
5Abnormal high discharging temperature/49C worked/
insufficient refrigerant
6Abnormal high pressure (63H worked)/Overheating
safeguard operation
7Abnormal temperature of heat sink
8Outdoor unit fan safeguard stop
9Compressor overcurrent interruption/Abnormal of power module
10 Abnormality of super heat due to low discharge temperature
11 Abnormality such as overvoltage or voltage shortage and
abnormal synchronous signal to main circuit/Current sensor error
12
13
U2
U5
UP
U3,U4
UF
U1,Ud
U8
U6
U7
U9,UH
Others
–
–– –
14 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.
12 Fb Indoor unit control system error (memory error, etc.)
–E0, E3
– E1, E2 Remote controller control board error
Remote controller transmission error
Compressor overcurrent interruption
To be continued on the next page.
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14
•If the unit cannot be operated properly after the above 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 takes place.
• No signals from the remote controller are accepted.
• OPE 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 follow-
ing power-on
After about 2
minutes has
expired follow-
ing 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 following power-on,op-
eration of the remote controller is not possible
due to system start-up. (Correct operation)
•Connector for the outdoor unit’s protection
device is not con-nected.
•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)
•On wireless remote controller
2The continuous buzzer sounds from receiving section of indoor unit.
3Blink of operation lamp
• On wired remote controller
1Check code displayed in the LCD.
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6-3. Test point diagram
6-3-1. Indoor power board
SLZ-KA25VAL.TH SLZ-KA25VA.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH
CNSK
Connect to the indoor controller board
(CNDK)
Between 11to 33220-240V AC
CN2S
Connect to the indoor controller board (CN2D)
Between 11to 3312.6-13.7V DC (Pin11(+))
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6-3-2. Indoor controller board
SLZ-KA25VAL.TH SLZ-KA25VA.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH
FAN
Fan motor output
CNP
Drain-pump output
(DP)
(220~240V AC)
CNC
Dew prevention
heater (H2)
(220~240V AC)
CNDK
Connect to the indoor
power board (CNSK)
(220~240V AC)
FUSE
(6.3A 250V)
CND
Power
supply input
(220~240V AC)
SWE
Emergency operation SW2
Capacity setting
Jumper connector
J11~J15
Unit setting
CN2L
Connector
(LOSSNAY)
CN51
Centrally control
CN6V
Vane motor output
(MV)
CN90
Connect to the
wireless remote
controller board
(CNB)
CN31
Drain sensor (DS)
CN29
Condenser/evaporator
temperature thermistor
(TH5)
CN21
Pipe temperature
thermistor/Liquid
(TH2)
CN20
Room temperature
thermistor (TH1)
CN22
Remote controller
connecting wire
(10.4~14.6V DC)
LED3
Transmission
(Indoor/outdoor)
LED2
Power supply
(R.B)
LED1
Power supply
(I.B)
CN2D
Connector to the indoor
power board (CN2S)
(12.5~13.7V DC)
CN3C
Transmission
(Indoor/outdoor)
(0~24V DC)
SW3
Mode selection
}
}
Non polarity
+
–
+
–
CN41
Connector
(HA terminal-A)
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6-4. Trouble criterion of main parts
Measure the resistance between the terminals using a tester.
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(Surrounding temperature 0:~60:)
(Refer to the thermistor)
Abnormal
Open or short
Normal
0.6k"~6.0k"
BLK RED ORNYLW
BLU BRN WHT
P
Room temperature
thermistor
(TH1)
Condenser/evaporator
temperature thermistor
(TH5)
Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)
Measure the resistance between the terminals with a tester.
(Coil wiring temperature 10°C ~ 30°C)
Pipe temperature
thermistor/liquid
(TH2)
Indoor fan motor
(MF)
Check method and criterion
Part name
Normal
KA25VA(L) Normal
WHT-BLK
BLK-BLU
BLU-YLW
BRN-RED
386~428"
81~91"
28~32"
157~174"
KA35VA(L)
373~413"
155~172"
44~49"
302~335"
KA50VA(L)
308~341"
135~151"
44~49"
293~324"
4.3kΩ~9.6k"
Abnormal
Abnormal
Opened or
short-circuited
Opened or short-circuited
Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:~30:)
Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:~30:)
Vane motor (MV)
Drain pump (DP)
Drain sensor (DS)
1
2
Yellow
Yellow
1
2
3
NormalConnector Abnormal
300"Open or short
Normal Abnormal
290"Open or short
Orange
Red
White
P: Thermal fuse 145 ±2˚C
Red — Yellow
Red — Blue
Red — Orange
Red — White
Blue Yellow
35
1
2
4
M
SLZ-KA25VAL.TH SLZ-KA25VA.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH
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0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature (:)
Resistance (k")
<Thermistor Characteristic graph>
•Room temperature thermistor (TH1)
•Pipe temperature thermistor/liquid (TH2)
•Condenser/evaporator temperature
thermistor (TH5)
Thermistor R0=15k' ± 3%
Fixed number of B=3480 ± 2%
Rt=15exp { 3480( ) }
0:15k'
10:9.6k'
20:6.3k'
25:5.2k'
30:4.3k'
40:3.0k'
Thermistor R0=6.0k' ±5%
Fixed number of B=3390 ± 2%
Rt=6exp { 3390( ) }
0:6.0k'
10:3.9k'
20:2.6k'
25:2.2k'
30:1.8k'
40:1.3k'
60:0.6k'
Thermistor for
lower temperature
1
273+t 1
273
1
273+t 1
273
-20 0 20 40 60 80
< Thermistor for drain sensor >
Temperature (:)
0
1
2
3
4
5
6
7
8
9
10
Resistance (k")
Thermistor for
drain sensor
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7 4-WAY AIR FLOW SYSTEM
7-1. 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.
Detail drawing of fresh air intake
Ceiling surface
Refrigerant pipe Drain pipe
Electrical Box
Cut out hole
[73.4
Burring hole
3-[2.8 hole
[100
118
25
120°
120°
Fresh air intake
Static pressure : P [Pa] Air flow : Q [m3/min]
50
-50
-100
-150
-200
-250
-300
00.5 1.0 1.5 2.0 2.5 3.0 3.5
SLZ-KA25VAL.TH SLZ-KA25VA.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH
Taking air into the unit
7-2. Fresh air intake amount & static pressure characteristics
Q
0
BA
C
1Curve in the
left praphs.
Duct characteristics
at site
Q
A
E C
2
Q
Qa
A D
3
Q…Planned amount of fresh air intake
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
C…Static pressure of booster fan with
air flow amount Q
D…Static pressure loss increase
amount of fresh air intake dust sys-
tem for air flow amount Q <Pa>
E…Static pressure of indoor unit with air
flow amount Q
Qa…Estimated amount of fresh air
intake with out D <m3/min>
<m3/min>
<Pa>
<Pa>
<Pa>
<Pa>
How to read curves
●Whenever the indoor unit is operating,
the duct fun
operates.
(1)Connect the optional multiple remote
controller adapter(PAC-SA88HA-
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 lines.
Use a relay under 1W.
MB: Electromagnetic switch power
relay for duct fan.
X: Auxiliary relay (12V DC LY-1F)
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 10m.
Be sure to secure insulation
material by tape and such
5Green
Yellow
Orange
Connector (5P)
Package side Multiplr remote
controller adapter
PAC-SA88HA-E Be sure to secure insulation
material by tape and such
Installation at site
CN51
on
indoor unit
board Red
Brown
1
~
CN51
MB
CN51(WHT)
7-3. Interlocking operation method with duct fan (Booster fan)
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
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7-4. Fixing of horizontal vane
Horizontal vane of each air outlet can be fixed according to the environment, which is installed.
Setting procedure
1) Turn off a main power supply (Turn off a breaker).
2) Disconnect the vane motor connector of the direction of the arrow with pressing the unlocking button as shown in figure
below.
Electricity insulate the disconnected connector with the vinyl tape.
Vane motor
Horizontal vane
Connector Unlocking button
Vane motor
3) Set a vertical vane of the air outlet, which tries to fixed by the hand slowly within the range in the table below.
Measured standard
position of the grille
Horizontal vane
Standard of
horizontal position
Dimension A (mm) 21 25 28 30
Level 30°
(Min.) Downward 45°Downward 55°Downward 70° (Max.)
wDimension 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.
<Set range>
.
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