Mitsubishi SRK63ZEA-S1 User manual

INVERTER WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
(Split system, air to air heat pump type)
SRK63ZEA-S1, 71ZEA-S1
ROOM AIR-CONDITIONING
TECHNICAL MANUAL & PARTS LIST

TECHNICAL MANUAL

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1
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CONTENTS
1. GENERAL INFORMATION .............................................................................. 2
1.1 Specific features ....................................................................................... 2
1.2 How to read the model name ................................................................... 2
2. SELECTION DATA ........................................................................................... 3
2.1 Specifications ............................................................................................ 3
2.2 Range of usage & limitations ................................................................... 5
2.3 Exterior dimensions.................................................................................. 5
2.4 Piping system ............................................................................................ 6
2.5 Selection chart .......................................................................................... 7
3. ELECTRICAL DATA ......................................................................................... 8
3.1 Electrical wiring......................................................................................... 8
4. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER.................... 9
4.1 Operation control function by remote control switch ........................... 9
4.2 Unit ON/OFF button .................................................................................. 11
4.3 Power blackout auto restart function...................................................... 11
4.4 Custom cord switching procedure .......................................................... 12
4.5 Flap and louver control ............................................................................ 12
4.6 Comfortable timer setting ........................................................................ 13
4.7 Sleep timer operation ............................................................................... 13
4.8 Outline of heating operation .................................................................... 14
4.9 Outline of cooling operation .................................................................... 17
4.10 Outline of dehumidifying operation ........................................................ 18
4.11 Outline of automatic operation ................................................................ 19
4.12 Outline of fan operation............................................................................ 20
4.13 Outline of clean operation ........................................................................ 20
4.14 Outline of allergen clear operation .......................................................... 20
4.15 ECONOMY operation ................................................................................ 22
4.16 External control (remote display)/control of input signal ..................... 22
4.17 Operation permission/prohibition control .............................................. 23
4.18 Protective control function ...................................................................... 24
5. APPLICATION DATA ....................................................................................... 31
5.1 Selection of location for installation ....................................................... 32
5.2 Installation of indoor unit ......................................................................... 33
5.3 Installation of outdoor unit....................................................................... 36
5.4 Refrigerant piping ..................................................................................... 36
5.5 Test run ...................................................................................................... 37
5.6 Precautions for wireless remote control installation and
operation .................................................................................................... 39
5.7 Installation of wired remote control and super link adapter
(SC-AD-E) (Optional parts) ....................................................................... 40
6. MAINTENANCE DATA ..................................................................................... 47
6.1 Troubleshooting procedures for electrical equipment .......................... 47
6.2 Servicing .................................................................................................... 66
7. REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL
FOR AIR CONDITIONERS USING R410A ...................................................... 67

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2
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1.2 How to read the model name
Example : SR K 63 Z EA - S1
Over heat of compressor
Error of signal transmission
Outdoor fan motor error
1GENERAL INFORMATION
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 or
heating equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
(1) Inverter (Frequency converter) for multi-steps power control
¡Heating/Cooling
The rotational speed of a compressor is changed in step in relation to varying load, to interlock with the indoor and outdoor
unit fans controlled to changes in frequency, thus controlling the power.
¡Allowing quick heating/cooling operation during start-up period. Constant room temperature by fine-tuned control after the
unit has stabilized.
(2) Fuzzy control
¡Fuzzy control calculates the amount of variation in the difference between the return air temperature and the setting tempera-
ture in compliance with the fuzzy rules in order to control the air capacity and the inverter frequency.
(3) 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.
(4) 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.
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 current
Current cut
2 time flash
3 time flash
RUN light
ON
1 time flash
5 time flash
TIMER light
R410A models
Series No.
Inverter type
Product capacity
Wall mounted type
Split type room air-conditioner
Room temperature sensor error
Indoor fan motor error
Heat exchanger sensor error
2 time flash
6 time flash
TIMER light
ON
1 time flash
RUN light
Rotor lock
6 time flash
7 time flash
2 time flash
RUN light
2 time flash

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2SELECTION DATA
2.1 Specifications
Model SRK63ZEA-S1 (Indoor unit)
SRC63ZEA-S1 (Outdoor unit) (240V)
Item
Model SRK63ZEA-S1 SRC63ZEA-S1
Cooling capacity(1) W6300 (900~7100)
Heating capacity(1) W7100 (900~9000)
Power source 1 Phase, 240V, 50Hz
Cooling input kW 1.84
Running current (Cooling) A 7.7
Heating input kW 1.86
Running current (Heating) A 7.8
Inrush current A 7.8
COP Cooling: 3.42 Heating: 3.82
Cooling Sound level Hi 43, Me 39, Lo 33, ULo 26 47
Noise level Power level dB 58 62
Heating Sound level Hi 44, Me 38, Lo 32, ULo 27 48
Power level 59 63
Exterior dimensions
Height ×Width ×Depth mm 318 ×1098 ×248 750 ×880 ×340
Color white
Net weight kg 15 59
Refrigerant equipment
Compressor type & Q’ty –TNB220FLBM1 (Twin rotary type) ×1
Motor kW –1.3
Starting method –Line starting
Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Refrigerant(3) kg R410A 1.9 (Pre-Charged up to the piping length of 15m)
Refrigerant oil R0.67 (MEL56)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 46 86
(Cooling) 18.5 46
Air flow (at High) (Heating) CMM 21 46
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 (Allergen clear 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
(2) The operation data are applied to the 240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(Purging is not required even for the short piping.)
If the piping length is longer, when it is 15 to 30 m, add 25g refrigerant per meter.
Operation data
(1)(2)
Refrigerant
piping
Compressor overheat protection, Heating overload protection (High pressure control), Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection, Cooling overload protection
The piping length is 7.5m.

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Item
Model SRK71ZEA-S1 SRC71ZEA-S1
Cooling capacity(1) W7100 (900~8000)
Heating capacity(1) W8000 (900~10500)
Power source 1 Phase, 240V, 50Hz
Cooling input kW 2.21
Running current (Cooling) A 9.3
Heating input kW 2.21
Running current (Heating) A 9.3
Inrush current A 9.3
COP Cooling: 3.21 Heating: 3.62
Cooling Sound level Hi 45, Me 40, Lo 34, ULo 26 52
Noise level Power level dB 60 67
Heating Sound level Hi 46, Me 40, Lo 34, ULo 27 49
Power level 60 64
Exterior dimensions
Height ×Width ×Depth mm 318 ×1098 ×248 750 ×880 ×340
Color white
Net weight kg 15 59
Refrigerant equipment
Compressor type & Q’ty –TNB220FLBM1 [Twin rotary type] ×1
Motor kW –1.3
Starting method –Line starting
Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved turbing
Refrigerant control Capillary tubes + Electronic expansion valve
Refrigerant(3) kg R410A 1.9 (Pre-Charged up to the piping length of 15m)
Refrigerant oil R0.67 (MEL56)
Deice control Microcomputer control
Air handling equipment
Fan type & Q’ty Tangential fan ×1 Propeller fan ×1
Motor W 46 86
(Cooling) 20 56
Air flow (at High) (Heating) CMM 22.5 46
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 (Allergen clear filter ×1, Photocatalytic washable deodorizing filter ×1)
Optional parts Wired-Remote control
Notes (1) The data are measured at the following conditions.
Model SRK71ZEA-S1 (Indoor unit)
SRC71ZEA-S1 (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 240V districts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15 m connecting piping.
(Purging is not required even for the short piping.)
If the piping length is longer, when it is 15 to 30 m, add 25g refrigerant per meter.
Operation data
(1)(2)
Refrigerant
piping
Compressor overheat protection, Heating overload protection (High pressure control), Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection, Cooling overload protection
The piping length is 7.5m.
(240V)

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2.2 Range of usage & limitations
2.3 Exterior dimensions
(1) Indoor unit
Models SRK63ZEA-S1, 71ZEA-S1
   
  
      
 !"#$% &%!"#$%
Cooling operation: Approximately 18 to 32°C
Heating operation: Approximately 15 to 30°C
Cooling operation: Approximately -15 to 46°C
Heating operation: Approximately -15 to 21°C
' ( ) Rating ±10%
*   Min. 85% of rating
+,(  -.$-++ (( Max. 7 times/h (Inching prevention 5minutes)
-.  -++ ) Max. 3 minutes
-  
  
*(  ( /
      0 -     0 -   


VIEW A
A
17.360
150
4
43.5
55
64
489
Piping hole right (left)
3
248
55
4
19 51.2
55
Terminal block
1090
Unit: mm
318
77
44.5
7.7
299
106
8.5301.8
25
50
Installation board
450
50
25
Piping for Gas (ø15.88) 633.5
44.5
53.5
106
49.5
349
886
221.547
Indoor unit
1098
Piping for Liquid (ø6.35) 703.5
Drain hose 772 (ø16)
Piping hole (ø65) Piping hole (ø65)

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(2) Outdoor unit
Models SRC63ZEA-S1, 71ZEA-S1
2.4 Piping system
Models SRK63ZEA-S1, 71ZEA-S1
Unit: mm
Terminal block
Service valve (Gas)
Flare fitting ø15.88 (5/8")
Service valve (Liquid)
Flare fitting ø6.35 (1/4")
25.1165.5
30°
30°
48.5103.3
750
24.1
Drain holes
2-ø15 25.8
29.8
87.9880
150580150
61
532
223
60
15
340
61 47.5
19 380 19
418
Outdoor unitIndoor unit
Heat
exchanger
Room temp.
sensor
Humidity
sensor
Heat
exchanger
Flare connecting
Heat
exchanger
sensor
Piping
(Liquid)
ø6.35
Piping
(Gas)
ø15.88
Check joint
4 way valve
Service valve (Liquid)
Flare connecting
Discharge pipe
temp. sensor
Cooling cycle
Heating cycle Outdoor air
temp. sensor
Heat exchanger
sensor
Compressor
uffler
M
Capillary tube
Strainer Strainer
accumulator
Accumulator
Sub
Service valve
(Gas)
Electronic
expansion valve

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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 SRK63ZEA-S1 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 = 6300 ✕0.975 ✕1.0 =6143W
SRK63ZEA-S1 Length 15m Factor by air
temperatures
Piping length [m]
Cooling
Heating
7
1.0
1.0
10
0.99
1.0
15
0.975
1.0
20
0.965
1.0
25
0.95
1.0
0.935
1.0
30
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
Cooling
Heating
2220181614
0.6
0.7
0.8
0.9
1.0
1.2
1.1
1.3
0
-5
-10
-15
Applicable range
Depends on installed situation
24
26
20
25
30
35
40
46
10
15
20
25
27
Outdoor air W.B. temperature ˚C W.B.
-15 -10 -5 0 5 10 15
Indoor air W.B. temperature ˚C W.B. ISO-T1 Standard Condition
Cooling operation
Outdoor air D.B.
temperature
˚CD. B.
Coefficient of cooling
&
Heating capacity in relation to temperature
Heating operation
Indoor air D.B.
temperature
˚CD. B.
ISO-T1 Standard Condition

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3ELECTRICAL DATA
3.1 Electrical wiring
Model SRK63ZEA-S1, 71ZEA-S1
Heat
HA
J
RD
Y/GN
R-AMP
Wireless
Display
G
Y/GN
Indoor unit Outdoor unit
BK
2/N
1
WH
3
2/N
1
3
RD
Y/GN
BK
WH
RD
BK
R/LS/N
WH
WH
RD
BK
1
3
Y
BL
4
5
6
exchanger
ZNR
F
250V
3.15A
Terminal block
TB TB
XZ
Y
XZ
Y
To wired
remote
control
(option)
BK
WH
RD
Power Source
1 Phase
240V 50Hz
N-1
N
WH
CNI
Y/G Y/G
CNO
CNG
CNH
CNG
CNH
G3G2
Y/G
U
WH
RD
BK
WH
RD
BK
W
CM
V
OR
OR AF_L1
AF_L2
L
GR
BL
GR
BL
AC.LAC.N
AC.LAC.N
L-1
L
BK
F
250V
20A
BK
20S
FMo
CNB
CND
CNJ
CNT
Th6
Th5
Th4
EEV
PWB2 (POWER)
PWB1 (MAIN)
CNG
RD
BK
PWB3 (CAPACITOR)
DC-P
DC-N
P_1
N_1
RD
BK
P_1
N_1
OR
OR
board
Printed circuit
CNE CNF
CNU
CNM
CNX
CNY
CNT
JEM-A
Option
CNB
XR1
XR2
XR3
XR4
XR5
CNG
FM
I
SM
LM1
LM2
Th3Th2Th1
Color symbol
Meaning of marks
Symbol Parts name Symbol Parts name Symbol Parts name
BK
BL
OR
Y/G
WH
RD
GR
Y
Black
Blue
Orange
Yellow/Green
White
Red
Green
Yellow
CM
F
FM
I
FM
o
SM
LM
1,2
Th
1
Th
2
Compressor motor
Fuse
Fan motor(Indoor)
Fan motor(Outdoor)
Flap motor
Louver motor
Room temp.sensor
Heat exch.sensor(Indoor unit)
Th
3
Th
4
Th
5
Th
6
ZNR
20S
EEV
DS
Humidity sensor
Heat exch.sensor(Outdoor unit)
Outdoor air temp.sensor
Discharge pipe temp.sensor
Varistor
4 way valve(coil)
Electronic expansion valve
Diode stack
L
RL
XR1
XR2
XR3
XR4
XR5
Inductor
Inspection lamp
Operation indication (DC12)
Heating indication (DC12)
ON indication for CM(DC12)
Check indication (DC12)
Distant operation
RL

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SIndication section
(1) Wireless remote control
4OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
4.1 Operation control function by remote control switch
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.
ALLERGEN button
This button selects ALLERGEN CLEAR
operation.
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 flow (up/down)
mode.
RESET switch
Switch for resetting microcomputer.
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.
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.
OFF TIMER button
This button selects OFF TIMER operation.
OPERATION MODE indicator
Indicates selected operation with lamp.
[ (Auto) • (Cool) • (Heat) • (Dry) •
(Fan) ]
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.
ALLERGEN CLEAR indicator
Indicates during ALLERGEN CLEAR operation.
SLEEP indicator
Indicates during SLEEP operation.
ON/OFF TIMER indicator
Indicates during ON/OFF TIMER operation.
CLEAN indicator
Indicates during CLEAN operation.
TIME indicator
Indicates present time or timer setting time.
AIR FLOW indicator
Shows selected flap and louver mode.
Models All models
SOperation section
TEMPERATURE button
This button sets the room temperature.
(This button changes the present time and
TIMER time.)
TIME SET UP switch
Switch for setting the time.
HI POWER/ECONO MODE indicator
Indicates during HIGH POWER/ECONOMY
mode operation.

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(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.
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 or allergen clear
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, ULO, 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.
Note (1) The SRK models don't support the switches and functions displayed in [ ].

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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) “AUTO RESTART” is cut, auto restart is disabled. (See the diagram at right)
Unit ON/OFF button
Jumper wire (J7)
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
ECONO light (orange)
Illuminates during ECONOMY operation.
HI POWER light (green)
Illuminates during HIGH POWER operation.
RUN (HOT KEEP) light (green)
•Illuminates during operation.
•Blinks at air flow stop due to the ‘HOT KEEP’
and ‘CLEAN operation’.
TIMER light (yellow)
Illuminates during TIMER operation.
HOT KEEP
CLEAN operation
ON
OFF
ON
OFF
1.5 sec.
0.5 sec.
3 sec.
1 sec.

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EXTERNAL INPUT
WIRED REMOCON
OPE PERMISSION
CUSTOM
AUTO RESTART
LO TEMP
DIRT PREVENT
COOL ONLY
HI CEIL
PANEL
50/60
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) (a) Swing flap
Flap moves in upward and downward directions continuously.
(b) Swing louver
Louver moves in left and right directions continuously.
(c) When not operating
The flap returns to the position of air flow directly below, when operation has stopped.
(2) Multi-directional Air Flow (up/down air 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
(3) 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 microcomputer, 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
Jumper wire (J4)
Cut

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Corrects the starting time of next operation by
calculating the temperature difference.
(Example) Heating
Setting temperature
Room temperature
Operation starting time
Time Setting time 15 min. 10 min. 5 min.
earlier earlier earlier
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.
=
<
=
<
=
<
=
<
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
¡If the difference (= Setting temperature – Room 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

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(3) Details of control at each operation mode (pattern)
(a) Fuzzy operation
Deviation between the room temperature setting correction temperature and the suction air temperature is calculated in
accordance with the fuzzy rule, and used for control of the air capacity and the inverter command speed.
(b) Heating thermostat operation
¡Operating conditions
If the inverter command speed obtained with the fuzzy calculation drops below -24 rps during the heating fuzzy operation,
the operation changes to the heating thermostat operation.
¡Detail of operation
4.8 Outline of heating operation
(1) Operation of major functional components in heating mode
(2) Air flow selection
(a) Speed of inverter changes within the range of selected air flow.
Item
Indoor fan motor ON ON OFF
Flap and louver ON or OFF ON or OFF Stop position control
Display Lights up Lights up Lights up or flashes
Outdoor fan motor ON
4-way valve Depending on the stop mode ON Depending on the stop mode
Electronic expansion valve Depending on the EEV control
When the inverter
speed is 0rps
When the inverter speed
is other than 0rps
When the inverter speed is 0rps
due to an anomalous stop
Functional
components
(b) When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode.
(c) Outdoor unit blower operates in accordance with the inverter command speed.
Model
SRK63ZEA-S1 SRK71ZEA-S1
Air flow selection
Inverter command speed 12~88rps 12~95rps
Air flow Depends on inverter command speed.
Inverter command speed 12~88rps 12~95rps
Air flow 9th speed fixed
Inverter command speed 12~88rps 12~95rps
Air flow 7th speed fixed
Inverter command speed 12~74rps 12~80rps
Air flow 5th speed fixed
ULO Inverter command speed 12~40rps
Air flow 3rd speed fixed
Auto
HI
MED
LO
Model
SRK63ZEA-S1, 71ZEA-S1
Item
Inverter command speed 0rps [Comp. stopped]
Indoor fan motor Hot keep N or M mode →1st speed
Outdoor fan motor Stop
Flap and louver Horizontal, center

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(4) Defrosting operation
(a) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.)
1) 1After start of heating operation →When it elapsed 45 minutes.(Accumulated compressor operation time)
2After end of defrosting operation →When it elapsed 45 minutes.(Accumulated compressor operation time)
3Outdoor unit heat exchanger sensor (Th4) temperature →When the temperature has been below –5°C for 3 minutes
continuously.
4¡The outdoor air temperature =
>–17°C
The difference between the outdoor air temperature sensor temperature and the outdoor heat exchanger temperature
sensor temperature is =
>7°C.
¡The outdoor air temperature < –17°C
The difference between the outdoor air temperature sensor temperature and the outdoor heat exchanger temperature
sensor temperature is =
>–5°C.
5During continuous compressor operation (Defrost operations shall not be performed from 10 minutes after the compressor
begins running.)
2) In addition, when the inverter command speed from the indoor controller of the indoor unit during heating operation has
counted 0 rps 10 times or more and all conditions of 1, 2, 3and 5 above and when the outdoor air temperature is 3°C
or less are satisfied (note that when the temperature for Th4 is -5°C or less: 30 rps or more, -4°C or less: less than 30 rps),
After running at an inverter command speed of 40rps for 7 minutes, defrost operations will start.
3) 1After start of heating operation →Less than 45 minutes.(Accumulated compressor operation time)
2After end of defrosting operation →Less than 45 minutes.(Accumulated compressor operation time)
3Outdoor unit heat exchanger sensor (Th4) temperature →When the temperature has been below –5°C for 3 minutes
continuously.
4¡The outdoor air temperature =
>–17°C
The difference between the outdoor air temperature sensor temperature and the outdoor heat exchanger temperature
sensor temperature is =
>20°C.
¡The outdoor air temperature < –17°C
The difference between the outdoor air temperature sensor temperature and the outdoor heat exchanger temperature
sensor temperature is =
>15°C.
5During continuous compressor operation (Defrost operations shall not be performed from 10 minutes after the compressor
begins running.)
(c) Hot keep operation
If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature of
the indoor unit heat exchanger (detected with Th2, indoor unit heat exchanger sensor) to prevent blowing of cool wind.
Note (1) Refer to the table shown above right for the values A and B.
¡Hot keep N mode (Air flow: HI, MED, LO, ULO)
Indoor heat exchanger temp. (˚C)
¡Values of A, B
AB
At 0 rps command 22 25
Other than 0 rps 10 15
command
Notes (1) Refer to the table shown above right for the values A and B.
¡Hot keep M mode (Air flow: AUTO, HIGH POWER, ECONOMY)
Indoor heat exchanger temp. (˚C)
¡Values of A, B
AB
At 0 rps command 22 25
Other than 0 rps 10 15
command
Indoor fan speed
A B 26 27 28 29.5 31.5 33 35.5 38 40.5 43 45.5 48
OFF
!0
o
i
u
y
t
r
e
w
q
Indoor fan speed
A B 26 27 28 29.5 31.5 33 34.5 36 37.5 39 40.5 42
OFF
!0
o
i
u
y
t
r
e
w
q

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Note (1) When outdoor unit heat exchanger sensor (Th4) temperature becomes 2°C or higher, inverter command changes 70 rps to 40
rps.
(c) Ending conditions (Operation returns to the heating cycle when either one of the following is met.)
1Outdoor heat exchanger sensor (Th4) temperature: 15°C or higher
2Continued operation time of defrosting →For more than 10 min.
indoor unit Hot keep
120sec.120sec.
40sec. 40sec.
Final defrost operation
Defrost
operation
(1)
Defrost end (Th4 15°C ,10 min.)
Hot keep
outdoor unit
Indoor fan
motor
Outdoor fan
motor
4-way valve
RUN light
Inverter
command
OFF
ON
ON
Corresponding
to speed
OFF
OFF
Corresponding
to speed
Defrost operation
preparation
Normal heating operation restored
Flashing
(Hot keep)
Fuzzy calculated
value
0
70rps
(b) Operation of functional components during defrosting operation
(5) Heating “HIGH POWER” operation (HI POWER button on remote control: ON)
Operation is maintained for 15 minutes with a higher blow out air temperature.
¡Detail of operation
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.
Model
SRK63ZEA-S1 SRK71ZEA-S1
Item
Inverter command speed 88 rps 95 rps
Indoor fan motor Hot keep M mode (max 10th speed)
Outdoor fan motor 6th speed

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4.9 Outline of cooling operation
(1) Operation of major functional components in Cooling mode
Item
Indoor fan ON ON OFF
Flap and louver ON or OFF ON or OFF Stop position control
Display Lights up Lights up Lights up or flashes
Outdoor fan motor ON
4-way valve Depending on the stop mode OFF Depending on the stop mode
Electronic expansion valve Depending on the EEV control
When the inverter
speed is 0rps
When the inverter speed
is other than 0rps
When the inverter speed is 0rps
due to an anomalous stop
Functional
components
(3) Detail of control in each mode (Pattern)
(a) Fuzzy operation
During the fuzzy operation, the air flow and the inverter command speed are controlled by calculating the difference between
the room temperature setting correction temperature and the suction air temperature.
(b) Cooling thermostat operation
1) Operating conditions
During the cooling fuzzy operation or when the inverter command speed obtained by the fuzzy calculation is less than
-24 rps.
2) Detail of operation
(2) Air flow selection
(a) Speed of inverter changes within the range of selected air flow.
(b) When any protective function actuates, the operation is performed in the mode corresponding to the function.
(c) Outdoor blower is operated in accordance with the inverter command speed.
(c) Cooling “HIGH POWER” operation (HI POWER button on remote control: ON)
The unit is operated continuously for 15 minutes regardless of the setting temperature.
1) Detail of operation
Notes (1) Protective functions will actuate with priority even during the “HIGH POWER” operation.
(2) Room temperature is not adjusted during the “HIGH POWER” operation
Model
SRK63ZEA-S1 SRK71ZEA-S1
Air flow selection
Inverter command speed 12~64rps 12~74rps
Air flow Depends on inverter command speed.
Inverter command speed 12~64rps 12~74rps
Air flow 8th speed fixed
Inverter command speed 12~54rps 12~62rps
Air flow 6th speed fixed
Inverter command speed 12~40rps 12~44rps
Air flow 4th speed fixed
Inverter command speed 12~30rps
Air flow 2nd speed fixed
Auto
HI
MED
LO
ULO
Model
SRK63, 71ZEA-S1
Item
Inverter command speed 0 rps [Comp. stopped]
Indoor fan motor Corresponds to fan speed switch.
Outdoor fan motor Stop
Model
SRK63ZEA-S1 SRK71ZEA-S1
Item
Inverter command speed 64 rps 74 rps
Indoor fan motor 8th speed
Outdoor fan motor 6th speed

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4.10 Outline of dehumidifying operation
(1) After operating the indoor blower for 20 seconds from immediately after the start of operation, the indoor temperature is checked
and, based on the result of check, the cooling oriented dehumidifying or heating oriented dehumidifying is selected.
Heating oriented dehumidifying Cooling oriented dehumidifying
Low –3 High
Room temperature - Setting temperature (deg)
Cooling or heating oriented dehumidifying is selected again one hour after the first selection of the cooling or heating oriented
dehumidifying.
Operation range
(2) Outline of control
(a) Cooling oriented dehumidifying
Room temperature and relative humidity is checked at 5-minute intervals after selecting the cooling or heating oriented
dehumidifying in order to determine the operation range.
Low –1 0 +2 High
Room temperature – Setting temperature (deg)
High humidity regions
I (I)
F (F) E (F) D (E)
Low humidity regions C (C) B (C) A (B)
Note (1) Figures in the parentheses
( ) show the values at
ECONOMY operation.
• Humidity sensor’s set values
55 70
Relative humidity (%)
High humidity regions
Low humidity regions
Determination of cooling
oriented dehumidifying
operation range
Operation pattern
Inverter command speed
(rps)
Indoor fan motor
Outdoor fan motor
30
4th speed
4th speed
5min.
22
2nd speed
3rd speed
5min.
12
2nd speed
3rd speed
5min.
30
3rd speed
4th speed
5min.
16
2nd speed
3rd speed
5min.
25sec.
40
5min.
4th speed
5th speed
0
1st speed
OFF
OFF
5min.
Temperature and humidity check
A range B range C range D range E range F range I range