Mitsubishi Heavy Industries SRK09CI User manual

ROOM AIR-CONDITIONING
TECHNICAL MANUAL & PARTS LIST
WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
(Split system, air cooled cooling only type)
SRK09CI, 12CI
SRK10CIV-4, 13CIV-4

TECHNICAL MANUAL
1. SRK09CI, 12CI ............................................................. 1
2. SRK10CIV-4, 13CIV-4.................................................. 33

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( )
1. SRK09CI, 12CI
WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
Split system, air cooled
cooling only type

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CONTENTS
1.1 GENERAL INFORMATION ......................................................................... 3
1.1.1 Specific features ..................................................................................... 3
1.1.2 How to read the model name ................................................................. 3
1.2 SELECTION DATA ...................................................................................... 4
1.2.1 Specifications ......................................................................................... 4
1.2.2 Range of usage & limitations ................................................................ 6
1.2.3 Exterior dimensions ................................................................................ 6
1.2.4 Piping system ......................................................................................... 8
1.2.5 Selection chart ........................................................................................ 9
1.3 ELECTRICAL DATA .................................................................................. 10
1.3.1 Electrical wiring ..................................................................................... 10
1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............. 11
1.4.1 Operation control function by remote control ................................... 11
1.4.2 Unit ON/OFF button .............................................................................. 12
1.4.3 Power blackout auto restart function ................................................. 12
1.4.4 Custom cord switching procedure ..................................................... 13
1.4.5 Flap control ........................................................................................... 13
1.4.6 TIMER operation ................................................................................... 14
1.4.7 Outline of cooling operation ................................................................ 15
1.4.8 Outline of dry operation ....................................................................... 16
1.4.9 Outline of auto operation ..................................................................... 17
1.4.10 Outline of fan operation ....................................................................... 17
1.4.11 Outline of clean operation ................................................................... 17
1.4.12 Protective control function .................................................................. 18
1.5 APPLICATION DATA ................................................................................. 19
1.5.1 Selection of location for installation ................................................... 20
1.5.2 Installation of indoor unit .................................................................... 21
1.5.3 Installation of outdoor unit .................................................................. 24
1.5.4 Connection of refrigerant pipings ....................................................... 24
1.5.5 Installation of remote control .............................................................. 25
1.5.6 Earthing work ........................................................................................ 25
1.5.7 Test run ................................................................................................... 26
1.5.8 Precautions for wireless remote control installation and
operation ............................................................................................... 26
1.6 MAINTENANCE DATA .............................................................................. 27
1.6.1 Trouble shooting .................................................................................. 27
1.6.2 Servicing ................................................................................................ 31

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1.1 GENERAL INFORMATION
1.1.1 Specific features
The “MITSUBISHI HEAVY INDUSTRIES, LTD.” room air-conditioner: SRK series are of split and wall mounted type and the unit
consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling equip-
ment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
(1) Remote control flap
The flap can be automatically controlled by operating wireless remote control.
¡Flap swing : The flaps swing up and down successively.
¡Memory flap : Once the flap position is set, the unit memorizes the position and continues to operate at the same position from
the next time.
(2) Auto operation
When the remote control is set on “auto( ) ”, it will either automatically decide operation mode such as cooling and dry, or
operate in the operation mode before it has been turned to automatic control.
(3) Self diagnosis function
¡We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation as
follows.
TIMER lightRUN light
Room temperature sensor error
Indoor fan motor error
Heat exchanger sensor error
2 time flash
6 time flash
TIMER light
ON Trouble of outdoor unit
2 time flash
RUN light
ON
1 time flash
1.1.2 How to read the model name
Example : SR K 09 C I
Series No.
Cooling only type
Product capacity
Wall mounted type
Split type room air-conditioner

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1.2 SELECTION DATA
1.2.1 Specifications
Model SRK09CI (Indoor unit)
SRC09CI (Outdoor unit)
(2) The operation data are applied to the 220 V or 230 V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 7.5 m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, when it is 7.5 to 15 m, add 10 g refrigerant per meter.
(4) Expressed in sound pressure level.
Notes (1) The data are measured at the following conditions.
Item
Model SRK09CI SRC09CI
kW 2.64
Cooling capacity(1)
BTU/h 9000
Power source 1 Phase, 220/230V, 50Hz
Cooling input kW 0.90
Running current (Cooling) A 4.2
Inrush current A 18
COP (In cooling) 2.93
Noise level(4) dB 41 49
Exterior dimensions mm 268 ×790 ×224 540 ×645 ×245
Height ×Width ×Depth
Color Fine snow Polar white
Net weight kg 8.0 27
Refrigerant equipment –RSA201A034
Compressor types & Q’ty
Motor kW –0.68
Starting method –Line starting
Heat exchanger Louver fins & inner grooved tubing Louver fins & grooved tubing
Refrigerant control Capillary tubes
Refrigerant(3) kg R22 0.43 (Pre-Charged up to the piping length of 7.5m)
Refrigerant oil R0.28 (SUNISO 4GSI or ATMOS NM56)
Air handling equipment Tangential fan ×1Propeller fan ×1
Fan type & Q’ty
Motor W 14 22
Air flow (at High) CMM 9.0 24
Air filter, Q’ty Polypropylene net (washable) ×2–
Shock & vibration absorber –Cushion rubber (for compressor)
Electric heater ––
Operation control Wireless-Remote control –
Operation switch
Room temperature control Microcomputer thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), –
HI POWER (Green), ECONO (Orange)
Safety equipment Frost protection, Thermostat (for compressor)
Fan motor error protection
O.D mm (in) Liquid line: ø6.35 (1/4") Gas line: ø9.52 (3/8")
Connecting method Flare connecting
Attached length of piping Liquid line: 0.4 m –
Gas line : 0.33 m
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2.5 m (3 cores with Earth)
Recommended breaker size A 20
Size ×Core number 1.5 mm2×3 cores (Including earth cable)
Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit
Optional parts –
Connection
wiring
Refrigerant
piping
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27°C 19°C 35°C 24°C ISO-T1, JIS C9612
(220/230V)
Operation
data
(1)

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(2) The operation data are applied to the 220 V or 230 V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 7.5 m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, when it is 7.5 to 15 m, add 10 g refrigerant per meter.
(4) Expressed in sound pressure level.
Notes (1) The data are measured at the following conditions.
Item
Model SRK12CI SRC12CI
kW 3.37
Cooling capacity(1)
BTU/h 11500
Power source 1 Phase, 220/230V, 50Hz
Cooling input kW 1.10
Running current (Cooling) A 5.1
Inrush current A 29
COP (In cooling) 3.06
Noise level(4) dB 42 49
Exterior dimensions mm 268 ×790 ×224 540 ×780 ×290
Height ×Width ×Depth
Color Fine snow Stucco white
Net weight kg 8.5 33
Refrigerant equipment –RSA201A035
Compressor types & Q’ty
Motor kW –1.0
Starting method –Line starting
Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing
Refrigerant control Capillary tubes
Refrigerant(3) kg R22 0.63 (Pre-Charged up to the piping length of 7.5m)
Refrigerant oil R0.41 (SUNISO 4GSI or NM56M)
Air handling equipment Tangential fan ×1Propeller fan ×1
Fan type & Q’ty
Motor W 14 22
Air flow (at High) CMM 10.0 32
Air filter, Q’ty Polypropylene net (washable) ×2–
Shock & vibration absorber –Cushion rubber (for compressor)
Electric heater ––
Operation control Wireless-Remote control –
Operation switch
Room temperature control Microcomputer thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), –
HI POWER (Green), ECONO (Orange)
Safety equipment Frost protection, Thermostat (for compressor)
Fan motor error protection
O.D mm (in) Liquid line: ø6.35 (1/4") Gas line: ø12.7 (1/2")
Connecting method Flare connecting
Attached length of piping Liquid line: 0.4 m –
Gas line : 0.33 m
Insulation Necessary (Both sides)
Drain hose Connectable
Power source cord 2.5 m (3 cores with Earth)
Recommended breaker size A 20
Size ×Core number 1.5 mm2×3 cores (Including earth cable)
Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit
Optional parts –
Connection
wiring
Refrigerant
piping
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27°C 19°C 35°C 24°C ISO-T1, JIS C9612
Model SRK12CI (Indoor unit)
SRC12CI (Outdoor unit)
(220/230V)
Operation
data
(1)

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1.2.2 Range of usage & limitations
1.2.3 Exterior dimensions
Indoor return air temperature
(Upper, lower limits)
Refrigerant line (one way) length Max. 15m
All models
Refer to the selection chart
Power source voltage Rating ±10%
Voltage at starting Min. 85% of rating
Frequency of ON-OFF cycle Max. 10 times/h
ON and OFF interval Max. 3 minutes
Outdoor air temperature
(Upper, lower limits)
Vertical height difference between
outdoor unit and indoor unit
Max. 5m (Outdoor unit is higher)
Max. 5m (Outdoor unit is lower)
Item
Models
(1) Indoor unit
Models SRK09CI, 12CI
Unit: mm
Piping hole (ø65)
( )
Piping hole (ø65)
53.5
09 :ø9.52
12 :ø12.7
Piping for Gas
53.5
44.5
7.5
44.5 43.2
39.3
202450138
133.5450206.5
102.5
585
102.5
252.2
8.3
200
380.6
Piping for Liquid 448.6 (ø6.35)
Drain hose 520 (ø16)
45
45
60
17.5 60 27
788
VIEW A
45
2.1
960
124
224 3
Terminal block
Piping hole right(left)
268
790
A
→

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Model SRC12CI
Unit: mm
Terminal block
ø12.7 (1/2")
ø6.35 (1/4")
Flare connecting
Service valve (Gas)
Service valve (Liquid)
Flare connecting
Drain holes
2-16×12
138.4
40°
61.9
18.9165.1510104.9
439.1
111.4
99.4
349.5
313.1
43.1
290
12
50
350
23.5312.514
33.5
40°
42.595.9
14
540
780
Unit: mm
(2) Outdoor unit
Model SRC09CI
192.5
372.5
82.5 480
82.5
61.5
2-ø12 Terminal
block
127.7 33.3
40˚ 40˚
645
Drain holes
Service valve (Gas)
Flare connecting ø9.52 (3/8˝)
Service valve (Liquid)
Flare connecting ø6.35 (1/4˝)
50
12
42
13.5
274.5
300
12 23
44
245
540
100.3 39.7
14.4

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1.2.4 Piping system
Model SRK09CI
Model SRK12CI
Outdoor unitIndoor unit
Room temp.
sensor
Heat
exchanger
Flare connecting
Heat
exchanger
sensor
Piping
(Liquid)
ø6.35
Check joint
Service valve (Liquid)
Flare connecting
Cooling cycle
Heat
exchanger
Compressor
Accumulator
Service valve
(Gas)
Capillary tube
Piping
(Gas)
ø9.52
Outdoor unitIndoor unit
Room temp.
sensor
Heat
exchanger
Flare connecting
Heat
exchanger
sensor
Piping
(Liquid)
ø6.35
Check joint
Service valve (Liquid)
Flare connecting
Cooling cycle
Heat
exchanger
Compressor
Capillary tube
Accumulator
Service valve
(Gas)
Capillary tube
Piping
(Gas)
ø12.7

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1.2.5 Selection chart
Correct the cooling capacity in accordance with the conditions as follows. The net cooling capacity can be obtained in the following way.
Net capacity = Capacity shown on specification ✕ Correction factors as follows.
(1) Coefficient of cooling capacity in relation to temperatures
(2) Correction of cooling capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling capacity in relation to the one way piping length between the indoor and outdoor units.
14 16 18 20 22
15
20
25
30
35
40
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
43
24
ISO-T1 Standard ConditionIndoor air W.B. temperature °C W.B.
Cooling
Applicable range
Coefficient of cooling capacity in relation to temperature
Cooling operation
Outdoor air D.B.
temperature
°C D.B.
Piping length [m]
Cooling
7
1.0
10
0.99
15
0.975
How to obtain the cooling capacity
Example : The net cooling capacity of the model SRK12CI with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C and
outdoor dry-bulb temperature 35˚C is Net cooling capacity =
SRK12CI
(11213 BTU/h)
Length 15m Factor by air
temperatures
(11500 BTU/h)
3370W 0.975 1.0 3286 W
✕✕ =

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1.3 ELECTRICAL DATA 1.3.1 Electrical wiring
Models SRK09CI, 12CI
51C
BK
BK
BL
Y/G
T
BK
BK
WH
WH
BR
OR
WH
WH
RD
WH
BK
2
3
1
Sh
CFo
Cc
OR
Outdoor unit
Indoor unit
1
2
BK Black
BL Blue
BR Brown
LB Light blue
YE Yellow
RD Red
OR Orange
WH White
Y/G Yellow/Green
Color symbol
Symbol Parts name Symbol Parts name
C
C
Capacitor for CM
FM Flap motor
CF
I
Capacitor for FM
I
,Th
12
Sensor
CF
O
Capacitor for FM
O
TTerminal block
CM Compressor motor
ZNR Varistor
FFuse
51C Motor protector for CM
FM
I
Fan motor (Indoor unit)
52C Magnetic contactor for CM
FM
O
Fan motor (Outdoor unit)
Meaning of marks
Notes (1) : denotes magnetized relay ×: denotes demagnetized relay
(2) Th
1 is room temperature sensor. Th 2 (the heat exchanger sensor) is frost prevention sensor.
Operation
Cooling
Relay symbol Control part
52C CM
Table of relay operations
M
1~ M
3~
U
M
FM
Power source
220/230V 50Hz
YG
LB
BR
Printed circuit board
T
WH
BK
Th1
Th2
Wireless
R-Amp
Display
CNE
CNG
YE
WH
RD
M
CNW
IC15
ZNR
1
5
3
CNU
CF
I
52C-4 52C-3
52C
F
250V 3.15A
CONTROL BOX
1
2
Back up Sw
CNM
N
t˚
t˚
1~
FMI
FMo CM

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1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
1.4.1 Operation control function by remote control
Remote control
Models SRK09CI, 12CI
◆Operation selection
◆Indication selection
FAN SPEED button
Each time the button is pushed, the
indicator is switched over in turn.
•The above illustration shows all controls, but in practice
only the relevant parts are shown.
OPERATION MODE select button
Each time the button pushed, the
indicator is switched over in turn.
ON/OFF (luminous) button
Press for starting operation, press again
for stopping.
HI POWER/ECONO button
This button changes the HIGH POWER/
ECONOMY mode.
AIR FLOW (UP/DOWN) button
This button changes the air flow (up/down) mode.
SLEEP button
This button selects SLEEP operation.
CLEAN switch
This switch changes the CLEAN mode.
ON TIMER button
This button selects ON TIMER operation.
This button cancels the ON TIMER, OFF
TIMER, and SLEEP operation.
CANCEL button
RESET switch
Switch for resetting microcomputer and
setting time.
SLEEP indicator
Indicates during SLEEP operation.
TEMPERATURE indicator
Indicates set temperature.
(Does not indicate temperature when operation
mode is on AUTO)
FAN SPEED indicator
Indicates set air flow rate with lamp.
CLEAN indicator
Indicates during CLEAN operation.
ON/OFF TIMER indicator
Indicates during ON/OFF TIMER operation.
AIR FLOW indicator
Shows selected flap mode.
HI POWER/ECONO MODE indicator
Indicates during HIGH POWER/ECONOMY
mode operation.
[
OPERATION MODE indicator
Indicates selected operation with lamp.
(Auto) • (Cool) • (Fan) • (Dry)]
OFF TIMER button
This button selects OFF TIMER operation.
TEMPERATURE button
This button sets the room temperature.
(This button changes the present time and
TIMER time.)
TIME indicator
Indicates present time or TIMER setting time.

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Unit indication selection
Models SRK09CI, 12CI
Unit ON/OFF button
1.4.2 Unit ON/OFF button
When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the
unit on and off.
(1) Operation
Push the button once to place the unit in the auto mode. Push it once more to turn the unit off.
(2) Details of operation
The unit will go into the auto mode in which it automatically determines, from room temperature (as detected by sensor), whether
to go into the cooling or dry modes.
Function Room temperature
Operation mode
setting Fan speed Flap
TIMER switch
Cooling About 23ºC
Dry About 24ºC
Auto Auto Continuous
1.4.3 Power blackout auto restart function
(1) Power blackout auto restart function is a function that records the operational status of the air-conditioner immediately prior to it
being switched off by a power cut, and then automatically resumes operations at that point after the power has been restored.
(2) The following settings will be cancelled:
(a) TIMER settings
(b) HIGH POWER operations
Notes (1) The power blackout auto restart function is set at on when the air-conditioner is shipped from the
factory. Consult with your dealer if this function needs to be switched off.
(2) When power failure ocurrs, the TIMER setting is cancelled. Once power is resumed, reset the
TIMER.
(3)
If the jumper wire (J7) “AUTO RESTART” is cut, auto restart is disabled. (See the diagram at right)
Jumper wire (J7)
RUN light (green)
Illuminates during operation
and ‘CLEAN operation’.
TIMER light (yellow)
Illuminates during TIMER operation.
HI POWER light (green)
Illuminates during HIGH POWER operation.
ECONO light (orange)
Illuminates during ECONOMY operation.

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1.4.4 Custom cord switching procedure
If two wireless remote controls are installed in one room, in order to prevent wrong operation
due to mixed signals, please modify the printed circuit board in the indoor unit’s control box
and the remote control using the following procedure. Be sure to modify both boards. If only
one board is modified, receiving (and operation) cannot be done.
(1) Modifying the indoor unit’s printed circuit board
Take out the printed circuit board from the control box and cut off jumper wire (J6)
using wire cutters.
After cutting of the jumper wire, take measures to prevent contact with the other the lead
wires, etc.
(2) Modifying the wireless remote control
(a) Remove the battery.
(b) Cut the jumper wire shown in the figure at right.
Jumper wire (J6)
1.4.5 Flap control
Control the flap by AIRFLOW button on the wireless remote control.
(1) Swing flap
Flap moves in upward and downward directions continuously.
(2) When not operating
The flap returns to the position of air flow directly below, when operation has stopped.
(3) Memory flap (Flap stopped)
When you press the AIRFLOW button once while the flap is operating, it stops swinging at an angle. Since this angle is memorized
in the microcomputer, the flap will automatically be set at this angle when the next operation is started.
¡Recommendable stopping angle of the flap
Horizontal
blowing
COOL•DRY
Cut

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¡If the difference (= Room temperature – Setting tempera-
ture) is 4°C, the correction value is found to be +5 min-
utes from the table shown above so that the starting time
of next operation is determined as follows:
15 min. earlier + 5 min. = 20 min. earlier
↑↑
Current operation Correction value
start time
Corrects the starting time of next operation by
calculating the temperature difference.
(Example) Cooling
Room temperature
Setting temperature
Operation starting time
Time Setting time 15 min. 10 min. 5 min.
earlier earlier earlier
Start
TIMER operation
(time)
Temperature
setting (˚C)
Cooling
(2) SLEEP operation
Pressing the SLEEP button causes the temperature to be controlled as shown in the following chart with respect to the set tempera-
ture.
+1.0
0
-1.0
01.0 2.0
1.4.6 TIMER operation
(1) Comfortable TIMER setting (ON TIMER)
If the TIMER is set at ON when the operation select switch is set at the cooling, or the cooling in auto mode operation is selected,
the comfortable TIMER starts and determines the starting time of next operation based on the initial value of 15 minutes and the
relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.
(Max. 60 minutes)
Operation mode Operation start time correction value (Min.)
3 < Room temp. – Setting temp. 1 < Room temp. – Setting temp. <
=3 Room temp. – Setting temp. < =1
At cooling
+5 No change –5
Notes (1) At 5 minutes before the ON TIMER time, operation starts regardless of the temperature of the room temperature sensor (Th1).
(2) This function does not actuate when the operation select switch is set at the dry as well as the dry in the auto mode.
However, the operation of item (1) above is performed during the dry in the auto mode.
(3) During the comfortable TIMER operation, both the RUN light and TIMER light illuminate and the TIMER light goes off after expiration of the TIMER, ON
setting time.
(3) OFF TIMER operation
The OFF TIMER can be set at a specific time (in 10-minute units) within a 24-hour period.

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1.4.7 Outline of cooling operation
(1) Operation of major fanctional components
(2) Fan speed switching
(a) Auto fan control
The indoor fan is automatically controlled in accordance with the difference between the room temperature (detected by the
room temperature sensor) and the thermostat setting as shown below.
(3) Thermostat operation
The compressor and outdoor fan and turned on and off as shown below according to the temperature setting.
(4) HIGH POWER operation ( “HI POWER” button on the remote control : ON)
The following operation is performed for 15 minutes without relation to the set temperature or fan speed setting.
(5) ECONOMY operation ( “ECONO” button on the remote control : ON)
The set temperature changes as shown at right, and the
indoor unit fan speed is set on speed 2.
Notes (1) Room temperature is not adjusted during the HIGH POWER operation.
(2) Protective functions will actuate with priority even during the HIGH POWER
operation.
Indoor fan motor
Flap
Display
52C
Outdoor fan motor
ON
ON or OFF
Lights up
OFF
OFF
ON
ON or OFF
Lights up
ON
ON
OFF
Stop position control
Lights up or flashes
OFF
OFF
When the compressor
command is OFF
When the compressor
command is ON
When the compressor goes
OFF due to an anomalous stop.
Functional
components
Item
Swing flap
Swing stop Auto fan control Speed 5 Speed 5
Speed 3
Speed 3
AUTO HIGH MED
Speed 2
Speed 2
LOW
Flow control
Fan speed switching
Speed 4
Speed 3
Speed 2
Thermostat setting point
Speed 5
+1 +2 +3 +4
OFF
ON
Set temp.
-1
Room temp.
Compressor
Outdoor fan
Indoor unit fan
Outdoor unit fan
Compressor
Speed 6 fixed
ON
ON
Running time
Running start ~ 1 hour
1~2 hours
2 hours ~
Set temperature compensation
Set temperature +0.5
Set temperature +1.0
Set temperature +1.5

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Note (1) Thermostat operation is performed in A, B block. When compressor and indoor fan stop by thermostat operation within 12 minutes from start, temperature
check is performed by operating indoor fan at speed 1 for 20 seconds before finishing 12 minutes and allowing decision of next operation block.
(3) Dry operation
After finishing start up operation described in (2) above, dry operation is performed at 8 minutes intervals, according to the
difference between room temperature and thermostat setting temperature as shown below.
Beside, 1 cycle of this operating time consists of 8 minutes, 7 cycle operation is performed then.
1.4.8 Outline of dry operation
(1) Choose the appropriate operation block area by the difference between room temperature and thermostat setting temperature as
shown below.
¡Operation block area
(2) Start up operation
ON
OFF
OFF
036912
ON
OFF
OFF
012
Compressor
and
outdoor fan
Speed 2
Indoor fan
Start Temperature check Start Temperature check
Compressor
and
outdoor fan
Indoor fan
Operation block decision
C.D block A.B block
minutes
minutes
Speed 2
Speed 1
20
seconds
ON
OFF
OFF
048
ON
OFF
OFF
08
Compressor
and
outdoor fan
Indoor fan
D block
Compressor
and
outdoor fan
Indoor fan
C block
Compressor
and
outdoor fan
Indoor fan
B block
Compressor
and
outdoor fan
Indoor fan
A block
20 seconds 20 seconds
minutes
minutes
Start Temperature check Start Temperature check
Operation block decision
20 seconds
minutes
minutes
Start Temperature check Temperature check
Operation block decision
Start
Speed 1
Speed 1
OFF
OFF
08
ON
OFF
OFF
038
Speed 1
Speed 2
Running time
Running start ~ 1 hour
1~2 hours
2 hours ~
Set temperature compensation
Set temperature +0.5
Set temperature +1.0
Set temperature +1.5
(4) ECONOMY operation ( “ECONO” button on the remote control : ON)
The set temperature changes as shown at right, and the
indoor unit fan speed is set on speed 2.
D block C block B block A block
–2 0 +3
Room temp. – Setting temp.(deg)
Speed 2
Speed 2

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1.4.9 Outline of auto operation
(1) Determination of operation mode
The blow operation of the indoor fan is carried out at the 1st speed for 20 seconds and the room temperature is checked to determine the
operation mode automatically. (When the unit is operated by the turn-on TIMER, the blow operation is not carried out.)
1.4.10 Outline of fan operation
(1) Operation of major fanctional components
(2) HIGH POWER operation (“HI POWER” button on the remote control : ON)
The following operation is performed for 15 minutes without relation to the set fan speed.
52C
Indoor fan motor
Outdoor fan motor
Flap
Speed 6 Speed 5 Speed 4
OFF
OFF
ON or OFF
Speed 3 Speed 2 Speed 1
HIGH
POWER AUTO HIGH MED LOW ECONOMY
Functional
components
Fan speed switching
Indoor unit fan
Outdoor unit fan
Compressor
Speed 6 fixed
OFF
OFF
Note (1) Protective functions will actuate with priority even during the HIGH POWER operation.
Room temperature<26°C 26°C<
=Room temperature
Operation mode Dry Cooling
(2) Within 30 minutes after either auto or manual operation stops, if auto operation is started, or if you switch to auto operation during
manual operation, the system runs in the previous operation mode.
(3) The temperature is checked 1 time in 30 minutes after the start of operation, and if the judgment differs from the previous operation
mode, the operation mode changes.
(4) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals of the
wireless remote control and the setting temperature.
Signals of wireless remote control (Display)
–6 –5 –4 –3 –2 –1 ±0+1+2+3+4+5+6
Setting Cooling 17 18 19 20 21 22 23 24 25 26 27 28 29
temperature Dry 18 19 20 21 22 23 24 25 26 27 28 29 30
1.4.11 Outline of clean operation
Cooling, Dry, Auto (Cooling, Dry); after operation has stopped, the moisture inside the dryer air conditioner, controls the production of
fungus etc.
(1) Operating condition
‘Clean’ is switched ON, when the air conditioner receives a STOP signal.
(2) Detail of operation
(3) Reset condition
When control finishes 120 minutes after the Clean operation starts. When the stop signal is received from the remote control.
Compressor OFF
Indoor fan motor Speed 1
Outdoor fan motor OFF
Flap Fully closed

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1.4.12 Protective control function
(1) Frost prevention for indoor heat exchanger [Preventing frost accumulation on the indoor heat exchanger]
During the Cooling or Dry operation in low room air temp. condition, evaporating temperature will decrease and consequently
indoor heat exchanger sometimes gets clogged with frost (or ice).
In order to prevent this trouble, compressor is stopped by under mentioned condition by indoor heat exchanger sensor (Th2) and
timer (built into microcomputer circuit) functions.
Also indoor fan is changed over to protects the fan tap just before frost prevention control.
CM, FMOstoppage condition
1Temperature of heat exchanger is
2.5˚C or lower.
2As least 3 minutes has passed since
the compressor started.
Indoor heat exchanger
temperature (˚C)
CM, FMOre-starting condition
1Temperature of heat exchanger is
8˚C or higher.
Set fan
speed
Protects
the fan
tap just
before
frost
prevention
control
(2) 3 minutes forced operation
When the compressor begins operating the thermal operation is not effective for 3 minutes, so operation continues as is in the
operation mode. (After 3 minutes has passed the thermal operation is effective.)
However, stopping the compressor via a stop signal or protection control has priority.
(3) Self diagnosis function
When something abnormal happens on the outdoor unit, indoor unit fan motor and each sensor (heat exchanger, room temperature),
it will be indicated by flashing lights.
(a) Abnormality of outdoor unit: When the indoor heat exchanger temperature does not fall to 25°C or below for 40 minutes
after 5 minutes have elapsed since the compressor operation start, the abnormality stop
occurs. (The TIMER light flashes 2 times.)
(b) Abnormality of indoor fan motor: The indoor fan motor revolves at a rate under 300 rpm for 30 seconds or longer, the
RUN light will flash.
(c) Abnormality of heat exchanger sensor: RUN light will flashing when the input temperature of the heat exchanger
sensor measures less than –20°C for more than 15 seconds with the air
conditioner “OFF”. (will not flashing during operation)
(d) Abnormality room temperature sensor: RUN light will flashing when the input temperature of the room temperature
sensor measures less than –20°C for more than 15 seconds with the air
conditioner “OFF”. (will not flashing during operation)
Note (1) If the above abnormalities happen concurrently, the light will flashing in the order of item number (a) through (d) above.
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