Mitsubishi Heavy Industries SRK100VNXWZRF User manual

Manual No.'22・PAC-SM-422
INVERTER PACKAGED AIR-CONDITIONERS
(Split system, air to air heat pump type)
Wi-Fi model
HYPER INVERTER
WALL MOUNTED TYPE
Single type
SRK100VNXWZRF
100VSXWZRF
MICRO INVERTER
WALL MOUNTED TYPE
Single type
SRK100VNAWZRF
100VSAWZRF
Twin type
SRK200VSAWPZRF
STANDARD INVERTER
WALL MOUNTED TYPE
Single type
SRK100VNPWZRF
SERVICE MANUAL

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TABLE OF CONTENTS
1. HYPER INVERTER PACKAGED AIR-CONDITIONERS ....................................... 2
2. MICRO INVERTER PACKAGED AIR-CONDITIONERS .......................................151
4. WIRELESS LAN INTERFACE SETTING MANUAL ............................................212
3. STANDARD INVERTER PACKAGED AIR-CONDITIONERS .............................185
5. APPICATION OPERATION MANUAL .................................................................223

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1. HYPER INVERTER PACKAGED AIR-CONDITIONERS
CONTENTS
1.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER................... 4
1.1.1 Remote control.......................................................................................... 4
1.1.2 Operation control function by the wired remote control....................... 7
1.1.3 Operation control function by the indoor control .................................. 10
(1) Unit ON/OFF button.................................................................................. 10
(2) Auto restart function.................................................................................. 10
(3) Auto swing control..................................................................................... 11
(4) Timer operation......................................................................................... 12
(5) Wireless LAN connection function ............................................................ 13
(6) Outline of heating or cooling operation ..................................................... 13
(7) Indoor fan motor protection....................................................................... 13
(8) Serial signal transmission error protection................................................ 13
(9) Plural unit control - Control of 16 units group by one remote control........ 13
(10) Filter sign .................................................................................................. 14
(11) Outline of automatic operation .................................................................. 14
(12) Frost prevention control ............................................................................ 15
(13) Dew prevention control ............................................................................ 15
(14) Outline of dehumidifying (DRY) operation ................................................ 16
1.1.4 Operation control function by the outdoor control............................... 17
(1) Determination of comressor speed .......................................................... 17
(2) Compressor start control........................................................................... 18
(3) Compressor soft start control.................................................................... 18
(4) Outdoor fan control ................................................................................... 19
(5) Defrost operation ...................................................................................... 21
(6)
Protective control/anomalous stop control by compressor’s number of revolutions .... 22
(7) Silent mode............................................................................................... 26
(8) Test run ..................................................................................................... 26
(9) Pump-down control................................................................................... 26
(10) Base heater ON/OFF output control (Option) ........................................... 27
(11) Manual defrost .......................................................................................... 27
(12) Limit the number of compressor start ....................................................... 27
1.2 MAINTENANCE DATA .................................................................................... 28
1.2.1 Diagnosing of microcomputer circuit .................................................... 28
(1) Selfdiagnosis function............................................................................... 28
(2) Troubleshooting procedure ....................................................................... 33
(3) Troubleshooting at the indoor unit............................................................. 34
(4) Troubleshooting at the outdoor unit .......................................................... 39
(5) Check of anomalous operation data with the remote control.................... 57
(6)
Power transistor module (Including the driver PCB) inspection procedure ... 60

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(7) Inverter checker for diagnosis of inverter output....................................... 62
(8) Outdoor unit control failure diagnosis circuit diagram............................... 64
1.2.2 Troubleshooting flow ................................................................................ 70
(1) List of troubles........................................................................................... 70
(2) Troubleshooting ........................................................................................ 73
1.3 ELECTRICAL WIRING ....................................................................................147
(1) Indoor unit.................................................................................................147
(2) Outdoor units ............................................................................................148
1.4 PIPING SYSTEM .............................................................................................150

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'16 • PAC-T-251
① Run/Stop switch
② F1 switch③F2 switch
Touch panel system, which is operated by tapping the LCD screen with a finger, is employed
for any operations other than the ①Run/Stop, ②F1 and ③F2 switches.
One push on the button starts operation and
another push stops operation.
This switch starts operation that is set in F1/F2
function change.
④Operation lamp
This lamp lights in green (yellow-green) during
operation. It changes to red (orange) if any error
occurs.
Operation lamp luminance can be changed.
⑤LCD (with backlight)
A tap on the LCD lights the backlight.
The backlight turns off automatically if there is
no operation for certain period of time. Lighting
period of the backlight lighting can be changed.
If the backlight is ON setting, when the screen is
tapped while the backlight is turned off, the backlight
only is turned on. (Operations with switches ①,②
and ③are excluded.)
⑥USB port
USB connector (mini-B) allows connecting to a
personal computer.
For operating methods, refer to the instruction
manual attached to the software for personal
computer (remote control utility software).
Note When connecting to a personal computer, do not connect
simultaneously with other USB devices.
Please be sure to connect to the computer directly,without
going through a hub, etc.
Model RC-EX3A
1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
1.10.1 Remote control
(1) Wired remote control
P044-055.pdf 2017/03/17 13:53:02
⑤ LCD (with backlight)
③F2 switch
④Operation lamp
⑥USB port (mini-B)
①Run/Stop switch
②F1 switch
1.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
1.1.1 Remote control
(1) Wired remote control (Option parts)
Model RC-EX3A

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(1) Wired remote control
Model RC-E5
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.
＊ All displays are described in the liguid crystal display for explanation.
The figure below shows the remote control with the cover opened.
Ventilaion display
Displayed during ventilation operation
Central control display
Displayed when the air conditioning system is
controlled by central control.
Timer operation display
Displays the timer operation setting.
Temperature setting buttons
These buttons are used to set the
temperature of the room.
Timer button
This button is used to set
the timer mode.
Timer setting buttons
These buttons are used to set
the timer mode and the time.
ESP button
This button is used to
select the auto static
pressure adjustment mode.
Cover
AIR CON No. button
Display the indoor unit number connected to this
remote control.
CHECK button
This button is used at servicing.
TEST button
This button is used during test operation.
Weekly timer display
Displays the settings of the
weekly timer.
Operation setting display area
Displays setting temperature, air flow
volume, operation mode and oparation
message.
Operation/check indicator light
During oparation: Lit in green
In case of error: Flashing in red
Operation/stop button
This button is used to operate and stop
the air-conditioning system.
Press the button once to operate the
system and press it once again to stop
the system.
MODE button
This button is used to change the
operation mode.
FAN SPEED button
This button is used to set the air flow
volume.
VENT button
This button is used to operate external
ventilator.
LOUVER button
This button is used to operate/stop the
swing louver.
SET button
●This button is used to fix the setting.
●This button is used to set the silent mode.
RESET button
●Press this button while making settings to go back to the
previous operation.
●This button is also used to reset the "FILTER CLEANING" display.
(Press it after cleaning the air filter)
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Model RC-E5

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(2) Wireless remote control
Operation section
Unit display section
3D AUTO light (green)
Illuminates during 3D AUTO operation.
TIMER light (yellow)
Illuminates during TIMER operation.
This button can be used for turning on/off the unit when
a remote control is not available.
Remote control signal receiver
Unit ON/OFF button
•Illuminates during operation.
•
•
•
Blinks slowly when SELF CLEAN operation
(3 seconds ON, 1 second OFF).
Blinks when air flow is stopped to prevent
blowing out of cold air in heating operation.
(1.5 seconds ON, 0.5 seconds OFF).
RUN light blink quickly during invalid operation
mode.
HI POWER light (green)
Illuminates during HIGH POWER operation.
RUN light (green)
OPERATION MODE select button
Each time the button is pressed, the
mode changes.
ALLERGEN CLEAR button
This button selects ALLERGEN CLEAR
operation.
ON/OFF (luminous) button
Press to start operation, press again
to stop.
TEMPERATURE button
This button sets the room temperature. AIR FLOW (UP/DOWN) button
This button changes the air flow (up/
down) direction.
TIME SET UP switch
This switch is used for setting the time.
SLEEP button
This button selects SLEEP operation.
MENU switch
This switch selects the SELF CLEAN
operation, wireless LAN communication
setting, wireless LAN connection
setting and PRESET operation.
ON TIMER button
This button selects ON TIMER operation.
TIMER button
This button is used for setting the current
time and timer function.
ACL switch
This switch resets the program to default
state.
PROGRAM button
This button sets WEEKLY TIMER.
HI/ECO button
This button changes the HIGH POWER/
ECONOMY operation.
AIR FLOW (LEFT/RIGHT) button
This button changes the air flow (left/
right) direction.
SILENT button
This button sets the SILENT operation.
OFF TIMER button
This button selects OFF TIMER
operation.
WEEKLY button
This button switches the WEEKLY
TIMER to ON/OFF.
FAN SPEED button
Each time the button is pressed, the fan
speed changes.
3D AUTO button
This button sets 3D AUTO operation.
NIGHT SETBACK button
This button sets NIGHT SETBACK
operation.
SET/Child lock button
Use this button to set the timer and
Child lock.
CANCEL button
This button cancels the ON timer, OFF
timer, and SLEEP operation.
Transmission section
The above illustration shows all controls, but in practice
only the relevant parts are shown.
[View with the cover opened]

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1.1.2 Operation control function by the wired remote control
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'16 • PAC-T-251
Service & Maintenance
Special settings
Indoor unit capacity display
Back
Select the item.
前ページ
Previous Back
Erase IU address
CPU reset
Restore of default setting
Touch panel calibration
Special settings
Select the item.
R/C function settings
Ventilation setting
Auto-restart
Auto temp setting
Back
Select the item.
Previous
Auto fan speed
② Auto-restart
Auto-restart
Back
Select the item.
Enable
Disable
1.10.2 Operation control function by the wired remote control
●Model RC-EX3A
(1) Switching sequence of the operation mode switches of remote control
(a) Tap the change operation mode button on the TOP screen.
(b) When the change operation mode screen is displayed, tap the button of desired mode.
(c) When the operation mode is selected, the display returns to the TOP screen.
Icons displayed have the following meanings.
Notes (1) Operation modes whichcannot be selected depending on combinations of indoor
unit and outdoor unit are not displayed.
(2) When the Auto is selected,the cooling and heating switching operation is performed
automatically according to indoor and outdoor temperatures.
(2) CPU reset
Reset CPU from the remote control as follows.
TOP screen Menu Service setting Service & Maintenance Service password
The selected screen is
displayed.
The selected screen is
displayed.
① Service & Maintenance #2 ②Special settings
⇒ ⇒ ⇒
CPU reset
Microcomputers of indoor unit and outdoor unit connected are reset
(State of restoration after power failure).
(3) Power failure compensation function (Electric power source failure)
Enable the Auto-restart function from the remote control as follows.
TOP screen Menu ⇒ Service setting ⇒ R/C function settings Service password
⇒
① R/C function settings menu #3
If the unit stops during operation,
It returns to the state before the power failure as soon as the power
source is restored (After the end of the primary control at the power
on).
It stops after the restoration of power source.
Enable
Disable
●Since the status of remote control is retained in memory always, it restarts operations according to the contents of memory
as soon as the power source is restored. Although the timer mode is cancelled, the weeklytimer, peakcut timerand silent
mode timer operate according to the following contents:
・When the clock setting is valid : These timer settings are also valid.
・When the clock setting is invalid : These timer settings become “Invalid” since the clock setting is invalid.
These timer settings have to be changed to “Valid” after the timer setting.
Cooling Fan
Dry Heating
Auto
(1) Switching sequence of the operation mode switches of remote control
(2) CPU reset
(3) Power failure compensation function (Electric power source failure)
●
Model RC-EX3A

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Clock setting check screen
Misconnection screen
●Content memorized with the power failure compensation are as follows.
Note(1) Items (f) and (g) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled
regardless whether the power failure compensation is effective or not.
(a) At power failure – Operating/stopped
If it had been operating under the off timer mode, sleep timer mode, the state of stop is memorized.
(b) Operation mode
(c) Air flow volume mode
(d) Room temperature setting
(e) Louver auto swing/stop
However, the stop position (4-position) is cancelled so that it returns to Position (1).
(f) “Remote control function items” which have been set with the administrator or installation function settings
(“Indoor function items” are saved in the memory of indoor unit.)
(g) Weekly timer, peak-cut timer or silent mode timer settings
(h) Remote control function setting
Please check the I/U
Set clock first on the initializing
screen & set the timer.
Other than A/C is connected
(4) Alert displays
If the following (a) to (c) appear, check and repair as follows.
Communication check screen ●This appears if communications cannot be established between the remote
control and the indoor unit.
Check whether the system is correctly connected (indoor unit, outdoor unit,
remote control) and whether the power source for the outdoor unit is connected.
●This appears when the timer settings are done without clock setting.
Set the clock setting before the timer settings.
●This appears when something other than the air-conditioner has been connected to the remote
control.
Check the location to which the remote control is connected.
(a) Communication check between indoor unit and remote control
(b) Clock setting check
(c ) Misconnection
(4) Alert displays

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●
Model RC-E5
(1) Switching sequence of the operation mode switches of remote control
DRY COOL FA N HEAT AUTO
(2) CPU reset
This functions when “CHECK” and “ESP” buttons on the remote control are pressed simultaneously. Operation is same as
that of the power source reset.
(3) Power failure compensation function (Electric power source failure)
• This becomes effective if “Power failure compensation effective” is selected with the setting of remote control function.
• Since it memorizes always the condition of remote control, it starts operation according to the contents of memory no
sooner than normal state is recovered after the power failure. Although the auto swing stop position and the timer mode
are cancelled, the weekly timer setting is restored with the holiday setting for all weekdays.
After recovering from the power failure, it readjusts the clock and resets the holiday setting for each weekday so that
the setting of weekly timer becomes effective.
• Content memorized with the power failure compensation are as follows.
Note (1) Items (f), (g) and (h) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is
cancelled regardless whether the power failure compensation is effective or not.
(a) At power failure – Operating/stopped
If it had been operating under the off timer mode, sleep timer mode, the state of stop is memorized. (Although
the timer mode is cancelled at the recovery from power failure, the setting of weekly timer is changed to the
holiday setting for all weekdays.)
(b) Operation mode
(c) Airowvolumemode
(d) Room temperature setting
(e) Louver auto swing/stop
However, the stop position (4-position) is cancelled so that it returns to Position (1).
(f) “Remote control function items” which have been set with the remote control function setting (“Indoor
function items” are saved in the memory of indoor unit.)
(g) Upper limit value and lower limit value which have been set with the temperature setting control
(h) Sleep timer and weekly timer settings (Other timer settings are not memorized.)
[Parts layout on remote control PCB]
Master/ slave setting when more than one remote controls are used
A maximum of two remote controls can be connected to one indoor unit (or one group of indoor units.)
Remote control cord (no polarity)
Remote control
SW1 "Master"
Switch Setting Contents
M Master remote control
SW1 S Slave remote control
Remote control
SW1 "Slave"
Indoor units
Note (1) Don’t change SW2 because it is not used normally.
Caution
When using multiple remote controls, the following dispiays or settings
cannot be done with the slave remote control. It is available only with
the master remote control.
Louver position setting (set upper or lower limit of swinging range)
Setting indoor unit functions
Setting temperature range
Operation data display
Error data display
Silent mode setting
Test operation of drain pump
Remote control sensor setting
XY
SW2
SW1
A
B
M
S
親
子
SW1
SW2

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'09•SRK-DB-087D
Jumper wire (JA2)
(1)ࠉUnit ON/OFF button
(a) Operation
(b) Details of operation
(2)ࠉAuto restart function
(a)
(b)
(i)
(4)Custom cord switching procedure
(a) Modifying the indoor printed circuit board
(b) Modifying the wireless remote control
(i)
(ii)
Cut
Function
Operation mode
Room temperature
setting
Fan speed Flap/Louver Timer switch
Cooling
DRY
Heating
Unit ON/OFF button
whether to go into the COOL or HEAT mode.
JA1
(i) SRK-ZSX series
room
Jumper wire (J1)
㻾㻌㻸㻌㻲㻌㻡㻌㻜㻌㻡㻌㻭㻌㻝㻌㻜㻌㻞
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'09•SRK-DB-087D
Jumper wire (JA2)
(1)ࠉUnit ON/OFF button
(a) Operation
(b) Details of operation
(2)ࠉAuto restart function
(a)
(b)
(i)
(4)Custom cord switching procedure
(a) Modifying the indoor printed circuit board
(b) Modifying the wireless remote control
(i)
(ii)
Cut
Function
Operation mode
Room temperature
setting
Fan speed Flap/Louver Timer switch
Cooling
DRY
Heating
Unit ON/OFF button
whether to go into the COOL or HEAT mode.
JA1
(i) SRK-ZSX series
room
Jumper wire (J1)
㻾㻌㻸㻌㻲㻌㻡㻌㻜㻌㻡㻌㻭㻌㻝㻌㻜㻌㻞
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Function
Roon temperature
setting Fan speed Swing control Timer switch
Cooling About 24ºC Auto Auto Continuous
Heating About 26ºC
Operation mode
Unit ON/OFF button
Jumper wire (JA1)
Unit ON/OFF button
Jumper wire (JA1)
(1) Unit ON/OFF button
(2) Auto restart function
(a) Operation
(b) Details of operation
1.1.3 Operation control function by the indoor control

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Note Even if
［Auto Swing］
isselected,thelouverpositionwithantidraftfunctionisxedtoposition1.
(a) RC-EX3A
(i) Louver control
1) To operate the swing louver when the air-conditioner is operating, press the “Direction” button on the TOP
screen of remote control. The wind direction select screen will be displayed.
2) Toswingthelouver,touchthe“Autoswing”button.Theloverwillmoveupanddown.Toxtheswing
louver at a position, touch one of [1] - [4] buttons. The swing lover will stop at the selected position.
3) Louver operation at the power on with a unit having the louver 4-position control function
The louver swings one time automatically (without operating the remote control) at the power on.
This allows the microcomputer recognizing and inputting the louver motor (LM) position.
(ii) Automatic louver level setting during heating
At the hot start and the heating thermostat OFF, regardless whether the auto swing switch is operated or not (auto
swing or louver stop), the louver takes the level position (in order to prevent blowing of cool wind). The louver
position display LCD continues to show the display which has been shown before entering this control.
(iii) Louver free stop control
If you touch the “Menu” → “Service setting” → “R/C settings” → “Service password” buttons one after
another on the TOP screen of remote control, the “Flap control” screen is displayed. If the free stop is selected
on this screen, the louver motor stops upon receipt of the stop signal from the remote control. If the auto swing
signal is received from the remote control, the auto swing will start from the position before the stop.
(b) RC-E5
(i) Louver control
1) Press the “LOUVER” button to operate the swing louver when the air-conditioner is operating.
“SWING
” is displayed for 3 seconds and then the swing louver moves up and down continuously.
2) To x the swing louver at a position, press one time the “LOUVER” button while the swing louver is
moving so that four stop positions are displayed one after another per second.
When a desired stop position is displayed, press the “LOUVER” button again. The display stops, changes
to show the “STOP 1 ” for 5 seconds and then the swing louver stops.
3) Louver operation at the power on with a unit having the louver 4-position control function
The louver swings one time automatically (without operating the remote control) at the power on.
This allows inputting the louver motor (LM) position, which is necessary for the microcomputer to
recognize the louver position.
Note (1) If you press the “LOUVER” button, the swing motion is displayed on the louver position LCD for 10 second. The display
changes to the “SWING ” display 3 seconds later.
(ii) Automatic louver level setting during heating
At the hot start with the heating thermostat OFF, regardless whether the auto swing switch is operated or not (auto
swing or louver stop), the louver takes the level position (In order to prevent the cold start). The louver position
display LCD continues to show the display which has been shown before entering this control.
(iii) Louver free stop control
When the louver-free stop has been selected with the indoor function of wired remote control “ POSITION”,
the louver motor stops when it receives the stop signal from the remote control. If the auto swing signal is
received from the remote control, the auto swing will start from the position where it was before the stop.
Note When the indoor function of wired remote control “ POSITION” has been switched, switch also the remote control
function “ POSITION” in the same way.
(3) Auto swing control
'09•SRK-DB-087D
Jumper wire (JA2)
(1)ࠉUnit ON/OFF button
(a) Operation
(b) Details of operation
(2)ࠉAuto restart function
(a)
(b)
(i)
(4)Custom cord switching procedure
(a) Modifying the indoor printed circuit board
(b) Modifying the wireless remote control
(i)
(ii)
Cut
Function
Operation mode
Room temperature
setting
Fan speed Flap/Louver Timer switch
Cooling
DRY
Heating
Unit ON/OFF button
whether to go into the COOL or HEAT mode.
JA1
(i) SRK-ZSX series
room
Jumper wire (J1)
㻾㻌㻸㻌㻲㻌㻡㻌㻜㻌㻡㻌㻭㻌㻝㻌㻜㻌㻞
00
'09•SRK-DB-087D
Jumper wire (JA2)
(1)ࠉUnit ON/OFF button
(a) Operation
(b) Details of operation
(2)ࠉAuto restart function
(a)
(b)
(i)
(4)Custom cord switching procedure
(a) Modifying the indoor printed circuit board
(b) Modifying the wireless remote control
(i)
(ii)
Cut
Function
Operation mode
Room temperature
setting
Fan speed Flap/Louver Timer switch
Cooling
DRY
Heating
Unit ON/OFF button
whether to go into the COOL or HEAT mode.
JA1
(i) SRK-ZSX series
room
Jumper wire (J1)
㻾㻌㻸㻌㻲㻌㻡㻌㻜㻌㻡㻌㻭㻌㻝㻌㻜㻌㻞
00

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(a) RC-EX3A
(i) Sleep timer
Set the time from the start to stop of operation. The time can be selected in the range from 30 to 240 minutes (in
the unit of 10-minute).
Note (1) Enable the “Sleep timer” setting from the remote control. If the setting is enabled, the timer operates at every time.
(ii) Set OFF timer by hour
Set the time to stop the unit after operation, in the range from 1 to 12 hours (in the unit of hour).
(iii) Set ON timer by hour
Set the time to start the unit after the stop of operation, in the range from 1 to 12 hours (in the unit of hour). It is
allowedalsotosetsimultaneouslytheindoortemperature,operationmode,airowrateandwarm-upenabled/
disabled.
(iv) Set ON timer by clock
Set the time to start operation. The time can be set in the unit of 5-minute. This setting can be switch only
onceordaily.Itisallowedalsotosetsimultaneouslytheindoortemperature,operationmode,airowrateand
warm-up enabled/disabled.
Note (1) It is necessary to set the clock to use this timer.
(v) Set OFF timer by clock
Set the time to stop operation. The time can be set in the unit of 5-minute. This setting can be switch only once
or daily.
Note (1) It is necessary to set the clock to use this timer.
(vi) Weekly timer
Set the ON or OFF timer for a week. Up to 8 patterns can be set for a day. The day-off setting is provided for
holidays and non-business days.
Note It is necessary to set the clock to use the weekly timer.
(vii) Combination of patterns which can be set for the timer operations

Í
Í
Í
Í






Í
Í Í
ÍÍ
ÍÍ
Í
Í
Í
Í
Í
Í
Í
Í
ÍÍÍ
Note :Allowed Í: Not
Sleep timer
Sleep timer
Set OFF timer by hour
Weekly timer
Set ON timer by hour Set OFF timer by clock Set ON timer by clock
Set OFF timer by hour
Set ON timer by hour
Set OFF timer by clock
Set ON timer by clock
Weekly timer
(b) RC-E5
(i) Sleep timer
Set the duration of time from the present to the time to turn off the air-conditioner.
It can be selected from 10 steps in the range from “OFF 1 hour later” to “OFF 10 hours later”. After the Sleep
timer setting, the remaining time is displayed with progress of time in the unit of hour.
(ii) OFF timer
Time to turn OFF the air-conditioner can be set in the unit of 10 minutes.
(iii) ON timer
Time to turn ON the air-conditioner can be set in the unit of 10 minutes. Indoor temperature can be set simultaneously.
(iv) Weekly timer
Timer operation (ON timer, OFF timer) can be set up to 4 times a day for each weekday.
(v) Combination of patterns which can be set for the timer operations
Sleep timer
OFF timer
ON timer
Weekly timer
Sleep timer
Í

Í
OFF timer
Í

Í
ON timer


Í
Weekly timer
Í
Í
Í
Notes (1) : Allowed Í: Not
Item
Item
(2) Since the ON timer, Sleep timer and OFF timer are set in parallel, when the times to turn ON and OFF the air-conditioner are duplicated, the
setting of the OFF timer has priority.
(4) Timer operation

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(vii) Combination of patterns which can be set for the timer operations

Í
Í
Í
Í






Í
Í Í
ÍÍ
ÍÍ
Í
Í
Í
Í
Í
Í
Í
Í
ÍÍÍ
Note :Allowed Í: Not
Sleep timer
Sleep timer
Set OFF timer by hour
Weekly timer
Set ON timer by hour Set OFF timer by clock Set ON timer by clock
Set OFF timer by hour
Set ON timer by hour
Set OFF timer by clock
Set ON timer by clock
Weekly timer
(b) RC-E5
(i) Sleep timer
Set the duration of time from the present to the time to turn off the air-conditioner.
It can be selected from 10 steps in the range from “OFF 1 hour later” to “OFF 10 hours later”. After the Sleep
timer setting, the remaining time is displayed with progress of time in the unit of hour.
(ii) OFF timer
Time to turn OFF the air-conditioner can be set in the unit of 10 minutes.
(iii) ON timer
Time to turn ON the air-conditioner can be set in the unit of 10 minutes. Indoor temperature can be set simultaneously.
(iv) Weekly timer
Timer operation (ON timer, OFF timer) can be set up to 4 times a day for each weekday.
(v) Combination of patterns which can be set for the timer operations
Sleep timer
OFF timer
ON timer
Weekly timer
Sleep timer
Í

Í
OFF timer
Í

Í
ON timer


Í
Weekly timer
Í
Í
Í
Notes (1) : Allowed Í: Not
Item
Item
(2) Since the ON timer, Sleep timer and OFF timer are set in parallel, when the times to turn ON and OFF the air-conditioner are duplicated, the
setting of the OFF timer has priority.
(6) Outline of heating or cooling operation
(a) Operation of major functional components in heating mode
ON OFF
ON ON
ON
ON ON(HOT KEEP)
OFF
OFF
(3 minutes ON)
OFF
OFF
Thermostat ON Thermostat OFF Failure
Heating
Compressor
Indoor fan
Outdoor fan
4-way valve
OFF
(few minutes ON)
(b) Operation of major functional components in cooling mode
ON OFF OFF
OFF OFF OFF
ON OFF
(few minutes ON)
ON ON OFF
Thermostat ON Thermostat OFF Failure
Cooling
Compressor
Indoor fan
Outdoor fan
4-way valve
OFF
(few minutes ON)
(7) Indoor fan motor protection
When the air-conditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 min-1 or
 lowerformorethan30seconds,theunitentersrstinthestopmodeandthenstopstheentiresystem.
(8) Serial signal transmission error protection
(a) Purpose
Prevents malfunction resulting from error on the indoor ↔outdoor signals
(b) Detail of operation
If the compressor is operating and a serial signal cannot be received from the indoor control with outdoor control having serial
signals continues for 7 minutes and 35 seconds, the compressor is stopped. After the compressor has been stopped, it will be
restarted
after the compressor start delay if a serial signal can be received again from the indoor control.
(9) Plural unit control – Control of 16 units group by one remote control
(a) Function
 Oneremotecontrolcancontrolagroupofmultiplenumberofunit(Max.16indoorunits).“Operationmode”which
is set by the remote control switch can operate or stop all units in the group one after another in the order of unit
No.(1). Thermostat and protective function of each unit function are independent.
Notes (1) Unit No. is set by SW1 on the interface PCB. Unit No. setting by SW1 is necessary for the interface only. In cases of the twin and triple
specication, it is necessary set for the master and the slave units. This can be selected by SW3. (All are set for the master unit at the
shipping from factory.)
SW1: For setting of 0 – 9, A – F
SW3: For setting of master and slave units
(See table shown at right.)
SW3 setting (For interface PCB)
SW3-1 SW3-2
Master OFF OFF
Slave1 OFF ON
Switch
Unit
(5) Wireless LAN connection function
(a) Operating conditions
When a signal of wireless LAN connection setting was received from a remote control during all air-conditioners stop
(b) Detail of operation
(i) A signal which corresponds to the signal received from a remote control is sent to air-conditioner.
(ii)Abuzzerforconrmationofreceiptrings.
(c) Reset conditions
Wheneitherofthefollowingconditionsissatised
(i) When a reception complete signal was received from interface
(ii) When an interface communication setting OFF signal was received from a remote control

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(2) Unit No. may be set at random unless duplicated, it should be better to set orderly like 0, 1, 2…, F to avoid mistake.
(b) Display to the remote control
(i) Central or each remote control basis, heating preparation
The smallest unit No. among the operating units in the remote mode (or the center mode unless the remote
mode is available) is displayed.
(ii) Inspection display, filter sign
Any of unit that starts initially is displayed.
(iii) Confirmation of connected units
1) In case of RC-EX3A remote control
If you touch the buttons in the order of “Menu” →“Service setting” →“Service & Maintenance” →“Service
password” →“IU address” on the TOP screen of remote control, the indoor units which are connected are displayed.
2) In case of RC-E5 remote control
Pressing “AIR CON No.” button on the remote control displays the indoor unit address. If “▲” “▼”
button is pressed at the next, it is displayed orderly starting from the unit of smallest No..
Indoor unit
Outdoor unit
Signal wiring
between outdoor unit
and indoor units
Connection cable
(Master unit)
(Slave unit 1)
Refrigerant piping
Remote control
Remote control wiring
R
Interfase kit
(Master) (Slave 1)
01 2 3 F
4 4
*1*1*1*1*1 *2*2
*1:In case of SRK single use.
*2:In case of SRK twin use.
(c) In case of anomaly
If any anomaly occurs on a unit in a group (a protective function operates), that unit stops with the anomalous stop
but any other normal units continue to run as they are.
(d) Signal wiring procedure
Signal wiring between indoor and outdoor units should be made on each unit same as the normal wiring. For the
group control, connect with wiring between rooms using terminal blocks (X, Y) of interface kit.
Connect the remote control communication wire separately from the power source cable or wires of other electric
devices (AC220V or higher).
(10) Filter sign
As the operation time (Total ON time of ON/OFF switch) accumulates to 180 hours (1), “FILTER CLEANING” is displayed
on the remote control. (This is displayed when the unit is in trouble and under the central control, regardless of ON/OFF)
Notes(1)Timesettingfortheltersigncanbemadeasshownbelowusingtheindoorfunctionofwiredremotecontrol“FILTERSIGNSET”.(Itissetat1at
the shipping from factory.)
Filter sign setting Function
Setting 1 Setting time: 180 hrs (Factory default)
Setting 2 Setting time: 600 hrs
Setting 3 Setting time: 1,000 hrs
Setting 4 Setting time: 1,000 hrs (Unit stop) (2)
(2) After the setting time has elapsed, the “FILTER CLEANING” is displayed and, after operating for 24 hours further (counted also during the stop),
the unit stops.
(11) Outline of automatic operation
(a) Determination of operation mode
Heating
Cooling
SP: Setting temperature
SP
Indoor air
temperature (˚C)
28
Outdoor air temperature (˚C)
Operation mode is determined by indoor air temperature and outdoor air temperature as following.

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(b) Operation mode is changes when keep cooling and heating thermostat off 20 minutes and be satisfied following conditions. If
the setting temperature is changed with the remote control, the operation mode is judged immediately.
(c) When the unit is startedagain within one hour after the stop of automatic operation or whenthe automatic operation is
selected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.
(d) 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.
※It can not be changed to heating mode if outdoor air temperature is 28℃or higher.
Heating SP: Setting temperature
Room air temperature (˚C)
mode
Cooling
Signals of wireless remote control (Display)
18 19 20 21 22 23 24 25 26 27 28 29 30
20 21 22 23 24 25 26 27 28 29 30 31 32
31
Setting
temperature
Cooling
Heating
SP＋1
SP－1
Unit : ℃
Keep operation
19 20 21 22 23 24 25 26 27 28 29 30
(a) Operating conditions
1) More than 8 minutes after starting the compressor
2) Indoorheatexchangertemperature(detectedwithTh2)islowerthan2.5 ℃.
(b) Contents of frosting operation
During this control Reset
Compressor ON/OFF command Forced stop Operation command
Indoor fan motor Depending on the air ow setting with the remote
control
(c) Resetting condition
Indoorheatexchangertemperature(Th2)ishigherthan8 ℃.
Indoor heat exchanger temperature (℃)
2.5 8
During
control
Reset
(13) Dew prevention control (During cooling or dehumidifying)
( i ) Operating conditions
When the following conditions have been satisfied for more than 30 minutes after starting operation
1) Command compressor speed is 20 rps or higher.
2) Detected value of humidity is 68% or higher.
(12) Frost prevention control (During cooling or dehumidifying)

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(ii) Contents of operation
1) Air capacity control
Note Ranges A and B are as shown below.
Model
Item SRK100ZR-W
Upper limit of command compressor speed (1) Range A: As per following table, Range B: 40 rps
Range A
63 68 78
Range B
Cancel
Humidity(%)
●Condition for range A
Command compressor speed is controlled according to the indoor
unitheatexchangertemperature(Th2)andtheindoorunitroomair
temperature (Th1).
Condition Command compressor speed
Th2 ≦Th1‒10
・
Decreasesthetargetmax.compressorspeed
by 4 rps.
・
If the condition is satisfied still 20 seconds
later, the speed is decreased further by 4 rps.
This process is repeated further so far as the
condition is satisfied.
〔Lower limit is 20 rps.〕
Th1‒10 ＜Th2 ≦Th1‒6
Targetmax.compressorspeedorchanged
value of the same is maintained.
Th1‒6＜Th2 Changedtargetmax.compressorspeedis
increased at a rate of 1 rps/20 seconds.
2) When this control has continued for more than 30 minutes continuously, the following wind direction control is
performed.
Whentheverticalwinddirectionissetatotherthantheverticalswing,theapschangetothehorizontalposition.
(iii) Reset conditions
Wheneitherofthefollowingconditionsissatised
1) Command compressor speed is less than 20 rps.
2) Detected value of humidity is less than 63%.
(13)
Outline of dehumidifying (DRY) operation
The purpose is "Dehumidification", and not to control the humidity to the target condition.
Indoor/outdoor unit control the operation condition to reduce the humidity, and also prevent over cooling.
(i) Indoor fan speed and compressor are controlled by the area which is selected by the temperature difference.
When the outdoor air temperature and room temperature is low in cooling operation, indoor unit can not operate in cooling,
and dehumidify. In this case, the units operate in heating to rise the indoor air temperature and after that start DRY operation.
(a) Purpose of DRY mode
(b) Outline of control
(ii) The indoor unit check the current area by every 5 minutes, and operate by the next checking.
(c) Other
Indoor fan speed
Area
D C B A
Lo speed
Indoor
fan speed ULo speed
Stop
Limited（Lower than
normal cooling operation）
Compressor Limited
speed Minimum （Lower than the speed in”Area A”）
Stop
Setting temperature
Difference between set temperature and indoor air temperature
(14) Outline of dehumidifying (DRY) operation

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1.1.4 Operation control function by the outdoor control
(1) Determination of compressor speed
Required compressor speed
(a) Cooling/dehumidifying operation Unit: rps
Model FDC100
Max.required
compressor speed
Usual operation 75
Silent mode, outdoor air temperature ≦15°C 40
Silent mode II ( When SW4-1 ON ) 36
Min.requiredcompressorspeed 11
(b) Heating operation Unit: rps
Model FDC100
Max.required
compressor speed
Usual operation 100
Silent mode 39
Silent mode II ( When SW4-1 ON ) 36
Min.requiredcompressorspeed 11
(c) Iftheindoorfanspeedbecomes“Me”or“Lo”,Maxrequiredcompressorspeedgoesdownaccordinglydependingon
indoor unit model.
(d) Max.requiredcompressorspeedunderhighoutdoorairtemperatureincoolingmode
 Maximumrequiredcompressorspeedisselectedaccordingtotheoutdoorairtemperature(Tho-A).
Unit: rps
Model FDC100
Max.required
compressor speed
Outdoor air temperature is
37°C or higher 75
Outdoor air temperature is
40°C or higher 75
Outdoor air temperature is
46°C or higher 70
(e) Max.requiredcompressorspeedunderoutdoorairtemperatureinheatingmode.
 Maximumrequiredcompressorspeedisselectedaccordingtotheoutdoorairtemperature(Tho-A).
Unit: rps
Model FDC100
Max.required
compressor speed
Outdoor air temperature is
18°C or higher 80
Outdoor air temperature is
10°C or higher 75
(f) Selectionofmax.requiredcompressorspeedbyheatexchangertemperature
(i) Maximum required compressor speed is selected according to the outdoor heat exchanger temperature (Tho-R)
duringcooling/dehumidifyingoraccordingtotheindoorheatexchangertemperature(Th2)duringheatingmode.
(ii) Whenthereare2indoorheatexchangertemperatures(Th2),whicheverthehigherapplies.
Whenthereare2outdoorheatexchangertemperatures(Tho-R),whicheverthehigherapplies.
Unit: rps
Model FDC100
Max.required
compressor speed
Cooling/
dehumidifying
Outdoorheatexchanger
temperature is 55°C or higher
70
Heating
Indoorheatexchanger
temperature is 55°C or higher
100
(g) When any of the controls from (a) to (f) above may duplicate, whichever the smallest value among duplicated controls
istakenasthemaximumrequiredcompressorspeed.
(h) Duringheating,itisoperatedwiththemaximumrequiredcompressorspeeduntiltheindoorheatexchanger
temperature becomes 40°C or higher.

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(a) Compressor protection start I
[Control condition] Normally, the compressor operation speed is raised in this start pattern.
[Control contents] (i) Starts with the target compressor speed at Arps.
However, when the outdoor air temperature (Tho-A) is 35°C or higher and the outdoor air
temperature (Tho-A) is 10°C or higher during cooling/dehumidifying or the room air
temperature (Th1) is 25°C or higher and the outdoor air temperature (Tho-A) is 10°C or higher
during heating, it starts at Crps.
(ii) At 30 seconds after the start of compressor, its target compressor speed changes to Brps and
thecompressorisoperatedfor2-4minuteswithitsoperationspeedxedatBrps.
Model Operation mode
Arps Brps Crps
FDC100 Cooling/Dehumidifying 35 35 25
Heating 35 35 25
(b) Compressor protection start III
[Control condition] Number of compressor starts is only 1 counted after the power source breaker ON.
[Control contents] Operates by selecting one of following start patterns according to the operation mode and the
outdoor air temperature (Tho-A).
(i) Low operation compressor speed control during cooling/dehumidifying
[Control condition] Upon establishing the conditions of compressor protection start III, the low operation
compressor speed control is performed during cooling/dehumidifying.
[Control contents] 1) Starts with the target compressor speed at Arps. When the outdoor air temperature
(Tho-A) is 35°C or higher, it starts at Crps.
2) At 30 seconds after the compressor start, the target compressor speed is changed to B
rpsandtheoperationcompressorspeedisxedfor10minutes.
Model Operation mode
Arps Brps Crps
FDC100 Cooling/Dehumidifying 35 35 25
(ii) Low operation compressor speed control during heating
[Control condition]
When the conditions of compressor protection start III are established and one of following
conditions 1) is satised, the low number of revolutions operation control is performed during
heating.
1) At 30 minutes or more after turning the power source breaker on.
[Control contents]
1) Starts the compressor with its target compressor speed at A rps. However, when the room
air temperature (Th1) is 25°C or higher, it starts at C rps.
2) At 30 seconds after the start of compressor, the compressor’s target compressor speed is
changed to B rpsandtheoperationcompressorspeedisxedfor10minutes.
Model Operation mode Arps Brps Crps
FDC100 Heating 35 35 25
(3) Compressor soft start control
(a) Compressor starts upon receipt of the thermostat ON signal from the indoor unit.
(b) However,atinitialstartafterturningthepowersourcebreaker,itmayenterthestandbystateformaximum30minutes
(“ PREPARATION” is displayed on the remote control) in order to prevent the oil loss in the compressor.
If the cooling/dehumidifying/heating operation is selected from the remote control when the outdoor unit is in the
standby state, “ PREPARATION” is displayed for 3 seconds on the remote control.
(2) Compressor start control

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(4) Outdoor fan control
(a) Outdoor fan tap and fan motor speed
Unit: min-1
Model Mode Fan motor tap
FDC100
①speed ②speed ③speed ④speed ⑤speed ⑥speed ⑦speed
Cooling/Dehumidifying 200 370 560 640 745 870 910
Heating 200 370 560 650 830 870 910
(b) Fan tap control during cooling/defumidifying operation
Fantapsareselecteddependingontheoutdoorheatexchangertemperature(Tho-R1,R2)andtheoutdoorairtemperature(Tho-A).
Note It is detected by Tho-R1 or R2, whichever the higher. • Silent mode only
zone zone zone zone zone zone zone zone
zone Tap 5 Tap 5 Tap 5 Tap 4 zone Tap 5 Tap 5 Tap 5 Tap 4
zone Tap 5 Tap 5 Tap 4 Tap 3 zone Tap 5 Tap 4 Tap 3 Tap 3
zone Tap 4 Tap 4 Tap 3 Tap 2 zone Tap 4 Tap 3 Tap 3 Tap 2
zone Tap 3 Tap 3 Tap 2 Tap 1 zone Tap 3 Tap 3 Tap 2 Tap 1
zone
zone
Outdoor air temperature (˚C)
15 18
zone
32 34
zone
46 48 zone
Outdoor heat exchanger temperature (˚C)
20 30
zone
33
zone
43
53
zone
(c) Fan tap control during heating operation
Fantapsareselecteddependingontheoutdoorheatexchangertemperature(Tho-R1,R2)andtheoutdoorairtemperature(Tho-A).
Note It is detected by Tho-R1 or R2, whichever the lower. • Silent mode only
zone zone zone zone zone zone
zone Tap 3 Tap 3 Tap 4 zone Tap 3 Tap 3 Tap 3
zone Tap 3 Tap 3 Tap 4 zone Tap 3 Tap 3 Tap 3
zone Tap 3 Tap 4 Tap 5 zone Tap 3 Tap 3 Tap 5
zone Tap 4 Tap 5 Tap 6 zone Tap 4 Tap 5 Tap 6
zone Tap 5 Tap 6 Tap 7 zone Tap 4 Tap 5 Tap 6
zone
zone
3 6
12 15
-2 0
1 3
58
11 14
Outdoor air temperature (˚C) Outdoor heat exchanger temperature (˚C)
zone
zone
zone
zone
zone
zone
(d) Outdoor fan control at cooling low outdoor air temperature
 Theoutdoor heatexchanger temperatureis detectedalways and,when thenumber ofrevolutions ofthe outdoorfan
speed has been increased or decreased, there is no change of fan speed for 20 seconds.