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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3
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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● 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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