York CIDH018B21S, Service Manual

Page: 136 / 186

5-6
SM-18001-rev.1
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING
5.4.1.1 Remote Control ON/OFF Function
This function provides a control to stop and start the system automatically from a remote place. Four
methods are available by using each signal from a building management system.
(1) Remote ON/OFF 1 (Level Signal Input) [ Input Setting: Code (03) ]
This is an ON/OFF function from a remote place by using level signals (ON/OFF). An example of
basic wiring and time chart is shown below.
NOTES:
1. Picking up signal within 10 seconds after power supply is turned ON is not possible due to initialization of
the components.
Do not change the signal (ON/OFF) in this period.
2. Wired Controller is required for this function.
3. If multiple indoor units are connected to the same communication cable for wired controller, input the
signal to any of these indoor units.
4. When the communication cable is not used in the twin, triple and quad combinations for simultaneous
operation, input the signal to the main indoor unit.
SS3
X1
Power
Supply
Control Circuit
Indoor Unit PCB
CN3
X1
3P Connector
3
2
1
2
1
NOTE:
When the unit is started by the remote ON/OFF switch,
the fan speed is subject to the mode memorized in
the wired controller.
SS3: Remote ON/OFF
Wiring Diagram Example of Remote ON/OFF
(Example: Remote ON/OFF is set to terminals 1 and 2 of CN3)
ON
OFF
ON
OFF
Time
Unit Operation
Signal to terminals 1 & 2 of CN3
Control by Wired Controller
Press the ON/OFF switch.
Time Chart
NOTE:
Operation priority is given to the remote
ON/OFF signal or wired controller
signal which is given last.
(Example: Remote ON/OFF is set to terminal 1 and 2 of CN3)