Mitsubishi SRK52HE User manual

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3
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WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
Manual No. ’05
.
SRK-T
.
046
(Split system, air to air heat pump type)
SRK52HE
SRK63HE
SRK71HE

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CONTENTS
1. GENERAL INFORMATION .............................................................................. 1
1.1 Specific features ....................................................................................... 1
1.2 How to read the model name ................................................................... 1
2. SELECTION DATA .......................................................................................... 2
2.1 Specifications ........................................................................................... 2
2.2 Range of usage & limitations .................................................................. 5
2.3 Exterior dimensions ................................................................................. 5
2.4 Piping system ........................................................................................... 7
2.5 Selection chart .......................................................................................... 8
3. ELECTRICAL DATA ........................................................................................ 9
3.1 Electrical wiring ........................................................................................ 9
4. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ................... 11
4.1 Operation control function by remote control switch ........................... 11
4.2 Unit ON/OFF button .................................................................................. 13
4.3 Power blackout auto restart function ..................................................... 13
4.4 Custom cord switching procedure ......................................................... 14
4.5 Flap and louver control ............................................................................ 14
4.6 Comfortable timer setting ........................................................................ 15
4.7 Sleep timer operation ............................................................................... 15
4.8 Outline of heating operation .................................................................... 16
4.9 Outline of cooling operation .................................................................... 18
4.10 Outline of dehumidifying operation ........................................................ 19
4.11 Outline of automatic operation................................................................ 20
4.12 Regulation of outdoor air flow................................................................. 21
4.13 Stop mode ................................................................................................. 22
4.14 External control (remote display)/control of input signal ..................... 23
4.15 Operation permission/prohibition control.............................................. 24
4.16 Protective control function ...................................................................... 24
5. APPLICATION DATA ....................................................................................... 27
5.1 Selection of location for installation ....................................................... 28
5.2 Installation of indoor unit......................................................................... 29
5.3 Installation of outdoor unit ...................................................................... 32
5.4 Refrigerant piping ..................................................................................... 32
5.5 Test run ...................................................................................................... 33
5.6 Precautions for wireless remote control installation and operation ........ 34
5.7 Installation of wired remote control and super link
adapter (SC-AD-E) (Optional parts) ......................................................... 35
6. MAINTENANCE DATA .................................................................................... 42
6.1 Troubleshooting procedures for electrical equipment ......................... 42
6.2 Servicing.................................................................................................... 50

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Error of signal transmission
1GENERAL INFORMATION
1.1 Specific features
The “Mitsubishi Daiya” 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 or heating equipment with opera-
tion control switch and the outdoor unit is composed of condensing unit with compressor.
(1) Remote control flap & louver
The flap & louver can be automatically controlled by operating wireless remote control.
¡Flap swing : The flaps swing up and down successively.
¡Louver swing : The louvers swing left and right successively.
¡Multi-directional Air Flow : Activating both up/down air swing and left/right air swing at the same time results in a multi-
directional air flow.
¡Memory flap : Once the flap & louver position is set, the unit memorizes the position and continues to operate
at the same position from the next time.
(2) Automatic operation
When the remote control switch is set on “auto( ) ”, it will either automatically decide operation mode such as cooling, heating
and thermal 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.
1.2 How to read the model name
Example : SR K 63 H E
Room temperature sensor error
Indoor fan motor error
Heat exchanger sensor error
2 time flash
6 time flash
TIMER light
ON
1 time flash
Outdoor heat exchanger sensor
error
Discharge pipe temp. sensor error
Outdoor temperature sensor error
2 time flash
4 time flash
RUN light
keeps flashing
1 time flash
Trouble of outdoor unit
Over heat of compressor
2 time flash
5 time flash
RUN light
ON
6 time flash
Series No.
Heat pump type
Product capacity
Wall mounted type
Split type room air-conditioner
(up/down air scroll and
left/right air scroll)
TIMER lightRUN light

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Item
Model SRK52HE SRC52HE
Cooling capacity(1) W5400
Heating capacity(1) W5600
Power source 1 Phase, 220-240V, 50Hz
Cooling input kW 1.73
Running current (Cooling) A 8.6/8.3/7.9
Heating input kW 1.49
Running current (Heating) A 7.4/7.1/6.8
Inrush current A 42
COP Cooling: 3.12 Heating: 3.76
Cooling Sound level Hi 43, Me 39, Lo 36 49
Noise level Power level dB 59 65
Heating Sound level Hi 41, Me 39, Lo 37 49
Power level 59 65
Exterior dimensions
Height ×Width ×Depth mm 318 ×1098 ×248 640 ×850 ×290
Color Yellowish white Stucco white
Net weight kg 15 47
Refrigerant equipment
Compressor type & Q’ty –RM5522GNE4 (Rotary type) ×1
Motor kW –1.7
Starting method –Line starting
Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing
Refrigerant control Capillary tubes + Electric expansion valve
Refrigerant(3) kg R22 1.6 (Pre-Charged up to the piping length of 7m)
Refrigerant oil R0.7 (B-32SAM)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 46 43
(Cooling) 17 42
Air flow (at High) (Heating) CMM 18 42
Air filter, Q’ty Polypropylene net (washable) ×2–
Shock & vibration absorber –Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote control –
Room temperature control Microcomputer thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″)Gas line: φ15.88 (1/2″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.70m
Gas line: 0.63m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source supply Terminal block (Screw fixing type)
Size ×Core number 1.5 mm2×4 cores (Including earth cable)
Connection wiring Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)
Optional parts Wired - Remote control
Notes (1) The data are measured at the following conditions.
2SELECTION DATA
2.1 Specifications
Model SRK52HE (Indoor unit)
SRC52HE (Outdoor unit)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612
(2) The operation data are applied to the 220/230/240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 7m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, when it is 7 to 15m, add 25g refrigerant per meter.
Operation data
(1) (2)
Refrigerant
piping
Compressor: overheat protection, Heating overload protection (High pressure control), Frost protection,
Serial signal error protection, Indoor fan motor error protection
The piping length is 7.5m.
(220/230/240V)

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Model SRK63HE (Indoor unit)
SRC63HE (Outdoor unit)
(2) The operation data are applied to the 220/230/240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 7m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, when it is 7 to 15m, add 25g refrigerant per meter.
Item
Model SRK63HE SRC63HE
Cooling capacity(1) W6100
Heating capacity(1) W6300
Power source 1 Phase, 220-240V, 50Hz
Cooling input kW 2.17
Running current (Cooling) A 10.8/10.4/9.9
Heating input kW 1.83
Running current (Heating) A 9.1/8.7/8.4
Inrush current A 48.2
COP Cooling: 2.81 Heating: 3.44
Cooling Sound level Hi 44, Me 40, Lo 37 49
Noise level Power level dB 59 65
Heating Sound level Hi 45, Me 40, Lo 38 49
Power level 60 65
Exterior dimensions
Height ×Width ×Depth mm 318 ×1098 ×248 640 ×850 ×290
Color Yellowish white Stucco white
Net weight kg 15 48
Refrigerant equipment
Compressor type & Q’ty –RM5526GNE4 (Rotary type) ×1
Motor kW –1.9
Starting method –Line starting
Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing
Refrigerant control Capillary tubes + Electric expansion valve
Refrigerant(3) kg R22 1.6 (Pre-Charged up to the piping length of 7m)
Refrigerant oil R0.7 (B-32SAM)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 46 43
(Cooling) 18 42
Air flow (at High) (Heating) CMM 19 42
Air filter, Q’ty Polypropylene net (washable) ×2–
Shock & vibration absorber –Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote control –
Room temperature control Microcomputer thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″)Gas line: φ15.88 (5/8″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.70m
Gas line: 0.63m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source supply Terminal block (Screw fixing type)
Size ×Core number 1.5 mm2×4 cores (Including earth cable)
Connection wiring Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)
Optional parts Wired - Remote control
Notes (1) The data are measured at the following conditions.
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612
Operation data
(1) (2)
Refrigerant
piping
Compressor: overheat protection, Heating overload protection (High pressure control), Frost protection,
Serial signal error protection, Indoor fan motor error protection
The piping length is 7.5m.
(220/230/240V)

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Item
Model SRK71HE SRC71HE
Cooling capacity(1) W6800
Heating capacity(1) W7200
Power source 1 Phase, 220-240V, 50Hz
Cooling input kW 2.05
Running current (Cooling) A 10.2/9.8/9.4
Heating input kW 1.88
Running current (Heating) A 9.4/9.0/8.6
Inrush current A 48
COP Cooling: 3.32 Heating: 3.83
Cooling Sound level Hi 45,Me 41,Lo 38 54
Noise level Power level dB 59 69
Heating Sound level Hi 44, Me 42, Lo 39 55
Power level 59 70
Exterior dimensions
Height ×Width ×Depth mm 318 ×1098 ×248 750 ×880 ×340
Color Yellowish white Stucco white
Net weight kg 15 63
Refrigerant equipment
Compressor type & Q’ty –2JS386D5AB02 (Rotary type) ×1
Motor kW –1.8
Starting method –Line starting
Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing
Refrigerant control Capillary tubes + Electric expansion valve
Refrigerant(3) kg R22 1.85 (Pre-charged up to the piping length of 7m)
Refrigerant oil R0.7 (ATMOS M60 or SUNISO 4GDID)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 46 85
(Cooling) 20.5 60
Air flow (at High) (Heating) CMM 20.5 60
Air filter, Q’ty Polypropylene net (washable) × 2 –
Shock & vibration absorber –Cushion rubber (for compressor)
Electric heater ––
Operation control
Operation switch Wireless-Remote control –
Room temperature control Microcomputer thermostat –
Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)
Safety equipment
O.D mm (in) Liquid line: φ6.35 (1/4″)Gas line: φ15.88 (5/8″)
Connecting method Flare connecting
Attached length of piping Liquid line: 0.70m
Gas line : 0.63m –
Insulation Necessary (Both sides)
Drain hose Connectable
Power source supply Terminal block (Screw fixing type)
Size ×Core number 1.5 mm2×4 cores (Including earth cable)
Connection wiring Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)
Optional parts Wired - Remote control
Notes (1) The data are measured at the following conditions.
Model SRK71HE (Indoor unit)
SRC71HE (Outdoor unit)
Item Indoor air temperature Outdoor air temperature Standards
Operation DB WB DB WB
Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612
Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612
(2) The operation data are applied to the 220/230/240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 7m connecting piping.
(Purging is not required even in the short piping.)
If the piping length is longer, when it is 7 to 15m, add 25g refrigerant per meter.
Operation data
(1) (2)
Refrigerant
piping
Compressor: overheat protection, Heating overload protection (High pressure control), Frost protection,
Serial signal error protection, Indoor fan motor error protection
The piping length is 7.5m.
(220/230/240V)

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2.2 Range of usage & limitations
2.3 Exterior dimensions
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(1) Indoor unit
Models SRK52HE, 63HE, 71HE
VIEW A
A
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Drain holes
286.4
12
50
290
49.6 43.5
850
203.1 510 136.9
476
Elogated hole
(2-12 x16)
314 12
328
Terminal block
Service valve (Liquid)
ø6.35 (1/4'')
Service valve (Gas)
ø15.88 (5/8'')
Ground
terminal
124 34.6
20˚
20˚
42.7
100.3
15
640
14
(2) Outdoor unit
Models SRC52HE, 63HE
Model SRC71HE
Unit: mm
Terminal block
25.1165.5
48.5103.3
750
24.1
Drain holes
25.8
29.8
87.9880
150580150
61
532
223
60
15
340
61 47.5
19 380 19
418
Unit: mm

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7
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2.4 Piping system
Models SRK52HE, 63HE
Outdoor unitIndoor unit
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Model SRK71HE

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8
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2.5 Selection chart
Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be
obtained in the following way.
Net capacity = Capacity shown on specification ✕ Correction factors as follows.
(1) Coefficient of cooling and heating capacity in relation to temperatures
(2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling and heating capacity in relation to the one way piping length between the indoor and outdoor
units.
(3) Correction relative to frosting on outdoor heat exchanger during heating
In additions to the foregoing corrections (1), (2) the heating capacity needs to be adjusted also with respect to the frosting on the
outdoor heat exchanger.
How to obtain the cooling and heating capacity
Example : The net cooling capacity of the model SRK63HE 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 = 6100 ✕0.975 ✕1.0 =5948W
SRK63HE Length 15m Factor by air
temperatures
15
ISO-T1 Standard Condition
010-10 -5 5
14 16 18 20 22
15
10
27
25
20
15
20
25
30
35
40
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
43
24
20
ISO-T1 Standard Condition
Heating
Cooling
Applicable range
Coefficient of cooling & Heating capacity in relation to temperature
Cooling operationHeating operation
Piping length [m]
Cooling
Heating
7
1.0
1.0
10
0.99
1.0
15
0.975
1.0
Air inlet temperature of
outdoor unit in ˚CWB
Adjustment coefficient
-10
0.95
-9
0.94
-7
0.93
-5
0.91
-3
0.88
-1
0.86
1
0.87
3
0.92
5
1.00

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9
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3ELECTRICAL DATA
3.1 Electrical wiring
Models SRK52HE, 63HE
DS
+
-
~~
JNL
CC
11
9
7
3
5
3
1
Option
XR1
XR2
XR3
XR4
XR5
HA
J
RD
Y/GN
R-AMP
Wireless
Display
G
Y/GN
BK
2/N
1
WH
3
2/N
1
3
L
N
RD
Y/GN
BK
R/LS/N
WH
WH
RD
BK
1
3
Y
BL
4
5
6
ZNR
ZNR
F
250V
3.15A
F
250V
3.15A
Terminal block
TB TB
XZ
Y
XZ
Y
WH
RD
BK
BK
Color symbol
Meaning of marks
Symbol
CM
F
FM
I
FM
O
SM
LM
1,2
Th
1
Th
2
Th
3
Compressor motor
Fuse
Fan motor(Indoor)
Fan motor(Outdoor)
Flap motor
Louver motor
Room temp.sensor
Heat exch.sensor(Indoor unit)
Humidity sensor
Capacitor for FM
O
Terminal block
Motor protector for CM
Operation indication (DC12)
Heating indication (DC12)
ON indication for CM(DC12)
Check indication (DC12)
Distant operation
Heat exch.sensor(Outdoor unit)
Outdoor air temp.sensor
Discharge pipe temp.sensor
Varistor
4 way valve(coil)
Electronic expansion valve
Diode stack
Auxiliary relay
Capacitor for CM
Th
4
Th
5
Th
6
ZNR
20S
EEV
DS
52
X1~4
CC
CF
O
TB
51C
XR1
XR2
XR3
XR4
XR5
Parts name
BL
OR
Y/G
Black
Blue
Orange
Yellow/Green
WH White
RD Red
GR Green
Y Yellow
Parts name Parts nameSymbol Symbol
BK
BK
WH
RD
WH
RD
WH
OR
Y
RD
BL
WH
BK
Y
Y
CM2
CM1
WV
U
52X1
52X3
52X4
52X2
Heat
exchanger
To wired
remote
control
(Option)
Power Source
1 Phase
220-240V 50Hz
Printed circuit
board
Printed circuit
board
CNE CNFCNM
CNU
CNX
CNY
CNT
JEM-A
CNBCNG
CNU
CNB
CNE
CNG
FM
I
SM
LM1
LM2
CM
51C
20S
52X
1
52X
2
52X
3
52X
4
EEV
FMo
CF
O
Outdoor unit
Indoor unit
Th3Th2Th1
Th4
Th5
Th6

-
10
-
DS
+
-
~~
JNL
CC
11
9
7
3
1
5
3
1
Option
XR1
XR2
XR3
XR4
XR5
CNE CNFCNM
CNX
CNY
CNT
CNG
SM
LM1
LM2
HA
J
RD
Y/GN
G
Y/GN
BK
2/N
1
WH
3
2/N
1
3
L
N
RD
Y/GN
BK
R/LS/N
WH
WH
RD
BK
1
3
Y
BL
4
5
6
ZNR
ZNR
F
250V
3.15A
F
250V
3.15A
Terminal block
TB TB
XZ
Y
XZ
Y
RD
WH
BK
BK
Color symbol
Meaning of marks
Symbol
CM
F
FM
I
FM
O
SM
LM
1,2
Th
1
Th
2
Th
3
Compressor motor
Fuse
Fan motor(Indoor)
Fan motor(Outdoor)
Flap motor
Louver motor
Room temp.sensor
Heat exch.sensor(Indoor unit)
Humidity sensor
Capacitor for FM
O
Terminal block
Operation indication (DC12)
Heating indication (DC12)
ON indication for CM(DC12)
Check indication (DC12)
Distant operation
Heat exch.sensor(Outdoor unit)
Outdoor air temp.sensor
Discharge pipe temp.sensor
Varistor
4 way valve(coil)
Electronic expansion valve
Diode stack
Auxiliary relay
Capacitor for CM
Th
4
Th
5
Th
6
ZNR
20S
EEV
DS
52
X1~5
CC
CF
O
TB
XR1
XR2
XR3
XR4
XR5
Parts name
BL
OR
Y/G
Black
Blue
Orange
Yellow/Green
WH White
RD Red
GR Green
Y Yellow
Parts name Parts nameSymbol Symbol
BK
WH
RD
WH
RD
WH
OR
Y
RD
BL
BK
WH
BK
Y
Y
CM2
CM1
W
V
U
52X1
52X3
52X4
52X5
52X2
Power Source
1 Phase
220-240V 50Hz
To wired
remote
control
(Option)
Heat
exchanger
Outdoor unit
Indoor unit
R-AMP
Wireless
Display
Printed circuit
board
Printed circuit
board
CNU
JEM-A
CNB
CNU
CNB
CNE
CNG
FM
I
CM
20S
EEV
FMo
CF
O
52X
1
52X
2
52X
3
52X
4
52X
5
Th4
Th5
Th6
Th3Th2Th1
Model SRK71HE

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11
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Models All models
SOperation section
FAN SPEED button
Each time the button is pushed, the indi-
cator 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 is pushed, the indi-
cator 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.
TIME SET UP switch
This switch for setting the time.
SLEEP button
This button changes to SLEEP operation.
CLEAN switch
This switch changes the CLEAN mode.
ON TIMER button
This button selects ON TIMER operation.
TEMPERATURE button
This button sets the room temperature.
(This button changes the present time and
TIMER time.)
OFF TIMER button
This button selects OFF TIMER operation.
RESET switch
Switch for resetting microcomputer.
AIR FLOW (LEFT/RIGHT) button
This button changes the air flow (left/right)
mode.
CANCEL button
This button cancels the ON timer, OFF
timer, and SLEEP operation.
4OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
4.1 Operation control function by remote control switch
(1) Wireless remote control
SIndication section
OPERATION MODE indicator
Indicates selected operation with lamp.
[ (Auto) • (Cool) • (Heat) • (Dry)]
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.
SLEEP indicator
Indicates during SLEEP operation.
ON/OFF TIMER indicator
Indicates during ON/OFF TIMER operation.
TIME indicator
Indicates present time or timer setting time.
AIR FLOW indicator
Shows selected flap and louver mode.
HI POWER/ ECONO MODE indicator
Indicates during High power/economy mode
operation.

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12
-
(2) Wired remote control (Optional parts)
The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display
area are shown in the figure for the sake of explanation.
Characters displayed with dots in the liquid crystal display area are abbreviated.
Pull the cover downward to open it.
Notes (1) The SRK models don't support the switches and functions displayed in [ ].
Weekly timer display
Displays the settings of
the weekly timer.
[Vent indicator]
Indicates operation in the
ventilation mode.
Operation/Stop switch
This switch is used to operate and
stop the air conditioning system.
Press the switch once to operate
the system and press it once again to
stop the system.
MODE switch
This switch is used to switch between
operation modes.
(The clean operation cannot be selected.)
Operation setting display area
Displays setting temperature,
airflow volume, operation mode and
operation message.
Operation/Check indicator light
During operation: Lit in green
In case of error: Flashing in red
FAN SPEED switch
This switch is used to set the
airflow volume.
(AUTO, HI POWER or ECONO
cannot be selected.)
SET switch
This switch is used to apply the timer
operation setting.
This switch is also used to make silent
mode operation settings.
[RESET switch]
Press this switch while making settings
to go back to the previous operation.
This switch is also used to reset the
FILTER CLEANING message display.
(Press this switch after cleaning the air filter.)
Central control display
Displayed when the air conditioning
system is controlled by the option controller.
Timer operation display
Displays the settings related to
timer operation.
AIR CON No. (Air conditioning system No.) switch
Displays the number of the connected
air conditioning system.
("00" appears.)
[CHECK switch]
This switch is used at servicing.
[TEST switch]
This switch is used during test operation.
Temperature setting switches
These switches are used to set
the temperature of the room.
[VENT switch]
Switch that operates the
connected ventilator.
Timer setting switches
These switches are used to set
the timer mode and time.
TIMER switch
This switch is used to select
a timer mode.
(The comfortable timer or sleep
operation cannot be selected.)
[GRILL switch]
This switch has no function.
When this switch is pressed,
(Invalid Operation)
is displayed, but it does not mean a failure.
LOUVER switch
This switch is used to operate/stop
the swing louver.
(UP/down swing only)
* If you oress any of the switches above and INVALID OPER is display, the switch has no function.
But it does not mean a failure.

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13
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EXTERNAL INPUT
WIRED REMOCON
OPE PERMISSION
CUSTOM
AUTO RESTART
LO TEMP
DIRT PREVENT
COOL ONLY
HI CEIL
PANEL
50/60
(3) Unit indication section
Models All models
RUN (HOT KEEP) light (green)
•Illuminates during operation.
•
Blinks at air flow stop due to the ‘HOT KEEP’
TIMER light (yellow)
Illuminates during TIMER operation.
HI POWER light (green)
Illuminates during HIGH POWER operation.
ECONOMY light (orange)
Illuminates during ECONOMY operation.
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 automatic mode. Push it once more to turn the unit off.
(2) Details of operation
The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by sensor),
whether to go into the cooling, thermal dry or heating modes.
Function Room temperature
Operation mode
setting Fan speed Flap
Timer switch
Cooling About 24ºC
Thermal dry About 24ºC Auto Auto Continuous
Heating About 26ºC
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) “AUTORESTART” is cut, auto restart is disabled. (See the diagram at right)
Unit ON/OFF button
Jumper wire (J7)

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14
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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 (J4) 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.
4.5 Flap and louver control
Control the flap and louver by AIRFLOW 
(UP/DOWN) and(LEFT/RIGHT) button on the wireless remote control.
(1) Swing flap
Flap moves in upward and downward directions continuously.
(2) Swing louver
Louver moves in left and right directions continuously.
(3) When not operating
The flap returns to the position of air flow directly below, when operation has stopped.
(4) Multi-directional Air Flow (up/down air scroll and left/right air scroll)
Activating both up/down air swing and left/right air swing at the same time results in a multi-directional air flow.
Up/down air scroll
Stops at this position
for 5 seconds.
In COOL, DRY and FAN operation
(5) Memory flap (Flap or Louver stopped)
When you press the AIRFLOW (UP/DOWN or LEFT/RIGHT) button once while the flap or louver is operating, it stops swinging
at an angle. Since this angle is memorized in the micro-computer, the flap or louver will automatically be set at this angle when the
next operation is started.
¡Recommendable stopping angle of the flap
Horizontal
blowing
COOL•DRY Slant forward
blowing
HEAT
Left/right air scroll
In COOL, DRY and FAN operationIn HEAT operation
Stops at this position
for 5 seconds.
In HEAT operation
Left louver Right louver
Thick line : moves quickly
Thin line : moves slowly
Cut
EXTERNAL INPUT
WIRED REMOCON
OPE PERMISSION
CUSTOM
AUTO RESTART
LO TEMP
DIRT PREVENT
COOL ONLY
HI CEIL
PANEL
50/60
Jumper wire (J4)

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15
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(Example) Heating
Setting temperature
Room temperature
4.6 Comfortable timer setting
If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating 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
3 < Setting temp. – Room temp. 2 < Setting temp. – Room temp. ≤3 Setting temp. – Room temp. ≤2
At heating +5 No change –5
Notes (1) At 5 minutes before the timer ON time, operation starts regardless of the temperature of the room temperature sensor (Th1).
(2) This function does not operate when in the Dry or Auto Dry and FAN mode.
However, the operation in item (1) does operate in the Auto Dry and FAN 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.
Corrects the starting time of next operation by
calculating the temperature difference.
Operation starting time
Time Setting time 15 min. 10 min. 5 min.
earlier earlier earlier
¡If the difference (= Setting temperature – Room tempera-
ture) is 4ºC, 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
=
=
=
=
Timer operation
(time)
Start
Timer operation
(time)
Temperature
setting (˚C)
Start
Temperature
setting (˚C)
Heating
Cooling, DRY
4.7 Sleep timer operation
Pressing the SLEEP button causes the temperature to be controlled as shown in the following chart with respect to the set temperature.
+1.0
0
-1.0
01.0 2.0
0
-1.0
-2.0
-3.0
-6.0
00.5 1.0 2.0

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16
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Note (1) Refer to the table shown above right for the values A and B.
Indoor heat exchanger temp. (˚C)
¡Values of A, B
AB
When the compressor
command is OFF 22 25
When the compressor 17 19
command is ON
(3) Thermostat operation
The compressor and outdoor fan and turned on and off as shown below according to the temperature setting.
(4) Hot keep
This function controls the indoor unit fan speed as shown below in accordance with the temperature sensed by the indoor heat
exchanger sensor.
(a) Indoor unit fan control
OFF
ON
Set temp.
Compressor
Outdoor fan
+1
Room temp.
Indoor fan
A B 26 27 28 29.5 31.5 33 34.5 36 37.5 39 40.5 42
0
9
8
7
6
5
4
3
2
1
OFF
4.8 Outline of heating operation
(1) Operation of major functional 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.
Indoor fan motor
Flap and louver
Display
Outdoor fan motor
ON
ON or OFF
Lights up
OFF*
ON
ON or OFF
Lights up
ON
ON
OFF
Stop position control
Lights up or flashes
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
4-way valve
Electric expansion valve Depending on the stop mode
Depending on the EEV control
Depending on the stop mode
Air scroll
Swing flap or louver
Swing stop
Auto fan control
Speed 9
Speed 9
Speed 9
Speed 7
Speed 7
Speed 7
AUTO HIGH MED
Speed 5
Speed 5
Speed 5
LOW
Flow control
Fan speed switching
Speed 9
Speed 7
Speed 5
Thermostat setting point
-5 -4 -3 -2 -1 0
(b) To accomplish rapid recovery from the thermostat off state, after the compressor and outdoor unit’s fan go OFF, the set
temperature is raised by 1ºC until 1 minute passes after the hot keep end temperature has been reached following restarting.
*However, the outdoor fan motor doesn’t stop for one minute after the compressor stops.

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17
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(5) Hot spurt
(a) For 40 minutes after a heating operation begins, the system runs with set temperature raised by 2ºC.
(b) In the following cases, this function is canceled and does not activate afterwards.
1) When the compressor and outdoor unit fan have been turned OFF by the thermostat going off.
2) During high pressure control operation.
(6) HIGH POWER operation (“HI POWER” button on the remote control : ON)
The system runs under the following conditions for 15 minutes without relation to the set temperature or the fan speed setting.
(7) Defrost operation
(a) Starting conditions (Defrost operation begins when all the following conditions are satisfied.)
1) 145 minutes have passed since the heating operation began. (Accumulated operation time)
245 minutes have passed since the previous defrosting operation ended. (Accumulated operation time)
3The outdoor unit heat exchanger temperature sensor is –5ºC or lower continuously for 3 minutes.
4¡The outdoor temperature =
>–7°C
The difference between the outdoor temperature sensor temperature and the outdoor heat exchanger temperature
sensor temperature is =
>7ºC.
¡The outdoor temperature < –7°C
The difference between the outdoor temperature sensor temperature and the outdoor heat exchanger temperature
sensor temperature is =
>–5ºC.
Notes (1) Room temperature is not adjusted during the HIGH POWER operation.
(2) Protective function will actuate with priority even during the HIGH POWER
operation.
Indoor unit fan
Outdoor unit fan
Compressor
Speed 10 fixed
ON
ON
5 The compressor is running.(Defrost shall not be performed once the Compressor has been ON for 10 minutes.)
2) Also, the number of times the compressor goes OFF is counted, and when it reaches 10 or more times, if the conditions
in 1, 2, 3above (except that the outdoor heat exchanger temperature sensor is –1ºC) and outdoor temperature is 3ºC
or lower, the defroster operation starts.
3) 1Less than 45 minutes since the heating operation began. (Accumulated operation time)
2Less than 45 minutes since the previous defrosting operation ended. (Accumulated operation time)
3The outdoor unit heat exchanger temperature sensor is –5ºC or lower continuously for 3 minutes.
4The difference between the outdoor temperature sensor temperature and the outdoor heat exchanger temperature sen
sor temperature is =
>12.5ºC (63 type:11ºC, 71 type:15ºC).
(b) End conditions (when either of the following conditions is satisfied)
1Outdoor heat exchanger temperature sensor: 15ºC or higher
2Defrosting operation has continued for 10 minutes.
(c) Operation of functinal components during defrosting operation
Hot keep
Defrost start operation 90sec. Operation after defrost is ended.
30sec. 30sec.
90sec.
Defrost operation
Recovery
temperature
(15°C)
Hot keep
Indoor unit fan
Outdoor unit fan
4-way valve
RUN light
Compressor command
OFF
OFF
ON
Lit
ON
ON
ON
OFF
OFF
Normal heating operation
(defrost recovery)
Controlled by the indoor heat
exchanger temperature
The chart at left is for reference.
Hot keep control governs operation
during heating.
Flashes

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18
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4.9 Outline of cooling operation
(1) Operation of major functional 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 termostat setting as shown below.
Indoor fan motor
Flap and louver
Display
Outdoor fan motor
ON
ON or OFF
Lights up
ON
ON or OFF
Lights up
ON
OFF
OFF
Stop position control
Lights up or flashes
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
Depending on the stop mode Depending on the stop mode
4-way valve
Electric expansion valve
Depending on the EEV control
Air scroll
Swing flap or louver
Swing stop
Auto fan control
Speed 8
Speed 8
Speed 8
Speed 6
Speed 6
Speed 6
AUTO HIGH MED
Speed 4
Speed 4
Speed 4
LOW
Flow control
Fan speed switching
Speed 6
Speed 4
Thermostat setting point
Speed 8
+1 +2 +3 +4
(8) Forced defrost
(a) Forced defrost operation can be performed only once time within 20 second, after the power source is turned on, in accor-
dance with the following operation.
1) Remote control operation
(b) If remote control operation is performed, for 1 minute after 3-minute timer operation, the operation is canceled if one of the
following conditions is satisfied.
1Outdoor heat exchanger temperature sensor: 14ºC or higher
210 minutes has passed (including the 1 minute of forced operation).
(9) ECONOMY operation ( “ECONO” button on the remote control : ON)
The set temperature changes as shown at right and the
indoor unit fan runs at speed 5.
Operation
Operation mode
Set temperature
Fan speed select
Air flow setting
On timer
Current time
On timer time
Run
Heating
19˚C
Low
Up/down swing
ON
On after 180 min.condition
Compressor
4-way valve
Indoor unit fan
Flap and louver
Outdoor unit fan
Display
ON
OFF
OFF
Fully closed
OFF
Same as defrost
2) Functional components operation
Running time
Running start ~ 1 hour
1~2 hours
2 hours ~
Set temperature compensation
Set temperature -1.0
Set temperature -2.0
Set temperature -2.5