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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