Specifications

CONTROLLER (Feb. 2009)
CNTR-75
CONTROLLER
DATA U4
4. SYSTEM COMPONENT
In a multi air conditionersystem that is a freeplan direct-expansion type,a connector for inputtingandoutputtingsignals
to/fromthe outsideis fittedas standardon the control boardofthe indoorandoutdoorunits.Use this when you want
each unit to input/outputsignalsindividually.(Note: When there are many control units it is recommendedthat you use
MELANS. This wouldenable you to save on labor.) In orderto have an input output signalfromeach connector,you must
have adedicatedadapter(sold separately) and a relay circuit (on-site arrangements).
Note :See next pagefor actual examples ofuse.
Category
Application
Input
Methodofdisablingcoolandheatoperation(thermo
off)byinputfromtheoutsidetotheoutdoorunit.
Output
Methodofreceivingasignalfromtheoutdoorunit
(water-sourceunit)totheoutside.
Canbeusedasadevicethatdisplays the oper-
ation state.
Canbeusedasaninterlockedcontrolwithex-
ternalequipment.
Typesofcontrolthatusesconnectorsfortheoutdoorunit/water-sourceunitinputoutputsignal
(connectionforeachtypeofoption).
Typesofcontrolthatusesconnectorsfortheindoorunitinputoutputsignal(connectionforeachtypeofoption)
Function
Connector
CategoryApplication Function
Connector
Input
(Note2,3)
MethodofON/OFFcontrolby turningonandoff switches or con-
tactsfromanoutsidetoeachindoorunitgroup.
Canbeusedasatimeradapter(Note1)
Canbeusedasa"forgettoswitchoffprevention"or"forcedstop".
Distant/local
switching(note1)
ON/OFF(level)
CN32
MethodofON/OFFcontrolby invertingstart/stopusingexternal
pulse(a-contact)foreachindoorunitgroup.
ON/OFF(pulse) CN51
Output
Methodofsendingsignalstooutsideforeachindoorunitgroup.
Itcanbeusedasadevicetodisplay operation states.
Itcanbeusedasaninterlockedcontrolwiththeexternalequip-
ment.
Operation state
Error state
Error state or
frostprevention
output (note 8)
Operation ON
signal(note9)
Operationmode
(heat) state
Operationmode
(cool,dry) state
Thermo ON
(fan) state
CN52
CN51
CompON/OFF
You can switchtheoperationmodebetweencooling
andheatingbyinputfromtheoutsidetotheoutdoor
unit.
Autochangeover
The lo
Forces the heat source unit to stop operation by
receivingcontactsignalsfromthepumpinterlock
circuit
wnoiseoperationoftheindoorunitcanbe
commencedby the externalinputtotheoutdoor
unit (water-source unit).
(Thenightmodecanbeadaptedonlyunder
f orheating)
Nightmode
PumpInterlock
signalinput
(level)
Compressor is
run state
CN3D
CN51
CN3D
CN3D
CN3D
CN51
TB8
TB8
TB8
TB8
Y, WYR2,WR2
less
CN3N
(W-Series) (W-Series)
Forcesoutdoorunittoperformafanoperationby
receivingsignalsfromthesnowsensor. (note 10)
Snow sensor
signalinput
CN3S
(Y-Series)
CN3S
(R2-Series)