Mitsubishi Electric SLZ-KA25VA Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES······················2
2. PART NAMES AND FUNCTIONS ·······3
3. SPECIFICATIONS································6
4. OUTLINES AND DIMENSIONS···········8
5. WIRING DIAGRAM ····························11
6. REFRIGERANT SYSTEM DIAGRAM ······12
7. TROUBLESHOOTING·······················13
8. 4-WAY AIR FLOW SYSTEM··············25
9. DISASSEMBLY PROCEDURE··········27
10. PARTS LIST·······································30
11. RoHS PARTS LIST····························34
July 2007
No. OC320
REVISED EDITION-B
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-KA25VA1.TH
SLZ-KA35VA SLZ-KA35VA.TH
SLZ-KA35VA1.TH
SLZ-KA50VA SLZ-KA50VA.TH
SLZ-KA50VA1.TH
SLZ-KA25VAL SLZ-KA25VAL.TH
SLZ-KA25VAL1.TH
SLZ-KA35VAL SLZ-KA35VAL.TH
SLZ-KA35VAL1.TH
SLZ-KA50VAL SLZ-KA50VAL.TH
SLZ-KA50VAL1.TH
INDOOR UNIT
Model name
indication
ON/OFF
TEMP.
SLZ-KA25,35,50VAL.TH
SLZ-KA25,35,50VAL1.TH SLZ-KA25,35,50VA.TH SLZ-KA25,35,50VA1.TH
Revision:
• SLZ-KA25/35/50VA(L)1.TH
are added in REVISED
EDITION-B.
• Some descriptions have
been modified.
•Please void OC320 REVISED
EDITION-A.
Note:
• This manual describes only
service data of the indoor
units. When servicing out-
door units, please refer to
the service manual
No.OC322 or OC323
together with this manual.
• RoHS compliant products
have <G> mark on the spec
name plate.
• For servicing RoHS
compliant products, refer
to the RoHS Parts List.
OC320B-1.qxp 07.7.19 8:45 AM Page 1

2
SLZ-KA25VAL.TH ➔SLZ-KA25VAL1.TH
SLZ-KA35VAL.TH ➔SLZ-KA35VAL1.TH
SLZ-KA50VAL.TH ➔SLZ-KA50VAL1.TH
SLZ-KA25VA.TH ➔SLZ-KA25VA1.TH
SLZ-KA35VA.TH ➔SLZ-KA35VA1.TH
SLZ-KA50VA.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)
1TECHNICAL CHANGES
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2PART NAMES AND FUNCTIONS
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grille
Filter
Removes dust and pollutants
from inhaled air.
Horizontal Air Outlet
Sets horizontal airflow automatically
during cooling or dehumidifying.
Air Intake
Inhales air from room.
Indoor Unit
SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL1.TH SLZ-KA25VA1.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL1.TH SLZ-KA35VA1.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL1.TH SLZ-KA50VA1.TH
ON/OFF
RESET
TOO
WARM
TOO
COOL
MODE
AUTO COOL
DRY HEAT
FAN
VANE
SELECT
TIME
h
ON / OFF button
To start and to stop operation.
VANE CONTROL button
To change the airflow
direction.
FAN SPEED button
To set fan speed to Low,
Medium or High.
TIMER SELECT button
To set time to start or stop
unit operation.
TEMPERATURE
SETTING button
To set any desired room
temperature.
MODE SELECT button
To change the operation
mode; Auto, Cooling ,
Heating and Drying . (SLZ)
• Avoid pushing buttons with fingernails and other sharp objects. Sharp objects may damage remote controller.
Attention:
Wireless remote comtroller
SLZ-KA25VAL.TH
SLZ-KA35VAL.TH
SLZ-KA50VAL.TH
SLZ-KA25VAL1.TH
SLZ-KA35VAL1.TH
SLZ-KA50VAL1.TH
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4
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
Temperature setting buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
lid
ON/OFF button
Fan Speed button
Filter button
(<Enter> button)
Test Run button
Check button (Clear button)
Airflow Up/Down button
Louver button
( Operation button)
To return operation
number
Ventilation button
( Operation button)
To go to next operation
number
Built-in temperature sensor
● Wired remote controller
Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
SLZ-KA25VA.TH SLZ-KA25VA1.TH
SLZ-KA35VA.TH SLZ-KA35VA1.TH
SLZ-KA50VA.TH SLZ-KA50VA1.TH
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5
● Wired remote controller
●
●
˚F˚C
˚F˚C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
Note:
“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOTAVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.
Display Section
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is available.
“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohib-
ited by a master controller.
“Timer is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
To be displayed on when it is time to
clean the filter.
Timer indicators
The indicator comes on if the corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
Shows the direction of the
outcoming airflow.
“One Hour Only” indicator
Room Temperature display
Shows the room temperature. The room
temperature display range is 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.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Displayed 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.
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6
SPECIFICATIONS
3
SLZ-KA25VAL(1).TH
SLZ-KA25VA(1).TH SLZ-KA35VAL(1).TH
SLZ-KA35VA(1).TH
Indoor service ref.
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 (at 26:)
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(1).TH
SLZ-KA50VA(1).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)
141:i3:
240V AC 15W
INDOOR UNIT
Item Service ref.
Indoor fan capacitor
Fuse
Vane motor
Terminal block
Indoor fan motor thermal fuse
Cord Heater
SLZ-KA25VAL(1).TH SLZ-KA35VAL(1).TH SLZ-KA50VAL(1).TH
(C1)
(FUSE)
(MV)
(TB)
(H2)
SLZ-KA25VA(1).TH SLZ-KA35VA(1).TH SLZ-KA50VA(1).TH
Specifications and rating conditions of main electric parts
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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
SLZ-KA35VAL1.TH
SLZ-KA35VA1.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
SLZ-KA25VAL1.TH
SLZ-KA25VA1.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
SLZ-KA50VAL1.TH
SLZ-KA50VA1.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 the indicated level in actual use due to surrounding echoes. The sound level can be high-
er by about 2 dB than the indicated level during cooling and heating operation.
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8
OUTLINES AND DIMENSIONS
4
Unit : mm
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
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)
1/4 inch
flared connection
{6.35mm
1/4 inch
flared connection
{6.35mm {9.52mm
flared connection
3/8 inch 1/2 inch
flared connection
Refrigerent pipe (liquid)
Refrigerent pipe (gas)
Models
{6.35mm
flared connection
1/4 inch
Refrigerent pipe (liquid) Refrigerent pipe
(gas)
{12.7mm {9.52mm
flared connection
3/8 inch
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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9
WIRELESS REMOTE CONTROLLER
Installation area
• Area in which the remote controller is not exposed to direct sunshine
• 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
1Attach the remote controller holder to the desired location using 2 tapping screws.
2Insert 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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WIRED REMOTE CONTROLLER Unit : mm
130
120
19
43.5
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