73
7-2-5. External master ON/OFF control
n Feature
The outdoor unit starts or stops the system.
n Wiring
Terminal
COOL
(SMC)
Heat
(SMH)
Input signal
ON
OFF
ON
OFF
Operation
Starts all indoor units.
Stops all indoor units.
n Function / Electric wiring diagram
SMC : Input signal for start
SMH : Input signal for stop
Connection
cable
Outdoor unit Local supply
I/F P.C. board TCB-PCMO2E
HEAT
COOL
COM
SMC
Shield
CN512 PJ17
SMH
CAUTION
• Be sure to prepare non voltage pulse point of contact for each terminal.
• This control is conducted when input signal stand up or fall down.
(Standing and falling status should be held for 100 m sec. or more.)
Input wiring
Size
3-core, 0.75 mm²
Length
Up to 500 m
Type
Shield wire
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