Hitachi RCIM-1.0FSRE - Page 60

3 Electrical and control settings
Unit electrical wiring and connection
SMGB0137 rev.0 - 05/2021
50
3 Use the shielded twist pair cable for control between the outdoor unit and the indoor units. They are connected to the
terminals 1 and 2 of the terminal boards. The remote control switch cable is connected to the terminals A and B of
each indoor unit terminal board.
? NOTE
• Whenthetotalwiringlengthforcontrolcablebetweentheoutdoorunitandtheindoorunitandbetweenindoorunitsislessthan100m,
thenormalwiring(morethan0.75mm
2
)exceptthetwistpaircableisavailable.
• Thetotalwiringlengthfortheremotecontrolswitchcanbeextendedupto500m.Ifthetotalwiringlengthlessthan30m,thenormal
wiring(0.3mm
2
)exceptthetwistpaircableisavailable.
! DANGER
• Tightlysecurewiringstotheterminalboardaccordingtothespeciedtorque.Iftighteningtheterminalsisnotcompleted,
heatgeneration,anelectricshockorarewilloccurattheterminalconnection.
• Makesurethatthewiresaresecurelyxedinordernottoapplyanexternalforcetotheterminalconnectionsofthewirings.
Ifxingisnotcompleted,heatgenerationorarewilloccur.
• Fixtheterminals thatdonot touchtothe electrical boxsurface. If theterminals are closedto the surface,it may cause
activationofELB,heatgenerationatterminalconnection,areoranelectricshock.
! CAUTION
• Separatethepowersupplywiringfromtheterminalblockforcontrollerandcommunicationcables(TB2).
• Donotconnectthemainpowersourcecablestothecontrolline(TerminalsA,B,1and2ofTB2).Ifconnected,theprintedcircuit
board(PCB)willbebroken.
• Pay attention to followings when wires are connected to terminal board.
(A)Attachaninsulationtapeorasleevetoeachterminal.
(B)Maintainthedistancebetweentheelectricalboxandtheterminalstopreventashortcircuit.
(C)Maintainthedistancebetweentheterminals.
(A)
(B)
(C)
Screw
? NOTE
Incaseofusingawiredremotecontrolswitch(PC-ARFP1E)oroptionalreceiverKit(PC-ALHZ1),thefollowingsettingisrequired:
• Thesettingbeforeshipmentis“Wireless”.SettheSW2to“Wired”.Ifnot,theoperationisnotavailable.
• ConnecttheremotecontrolswitchcablestotheterminalsAandBattheterminalboardTB2.
SW2
DIP switch PCB
Wired
Wireless
Change to "Wired"
Incaseofusingawirelessremotecontrolswitch(PC-AWR):
• TheSW2switchsettingisNOTrequired when the wireless remote control switch (PC-AWR)isusedwiththereceiverbuiltinthe
indoorunit.However,thesimultaneousindoorunitsoperationisnotavailablewhenthiswirelessremotecontrolswitchisusedwith
thereceiverbuiltintheindoorunit.Ifthesimultaneousindoorunitsoperationisrequiredwiththiswirelessremotecontrolswitch,use
theoptionalreceiverkit(PC-ALHZ1).
• Fortheidentifyingofindoorunitsinstalledsidebysideoperation,thewirelessremotecontrolswitchshouldbesetat“b,cordmode”.
(RefertoInstallationandOperationManualforthewirelessremotecontrolswitchabout“mode”setting).