SM-18001-rev.1
5-15
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING
(5) Picking Up Heating Operation Signal [ Output Setting: Code (05) ]
This function is utilized to pick up a heating operation signal that has nothing to do with the compressor
stoppage by a thermistor. An example of basic wiring is shown below. The contact of the auxiliary
relay “RYa” is closed when this operation signal is given.
Picking Up Operation Signal
(Example: Heating Operation Output is set to terminals 1 and 3 of CN7.)
CN7 Connector
CN7
1
3 P Connector
Indoor Unit PCB
3
Auxiliary Relay
RYa
RY
(3) Picking Up Cooling Operation Signal [ Output Setting: Code (03) ]
This function is utilized to pick up a cooling operation signal that has nothing to do with the compressor
stoppage by a thermistor. An example of basic wiring is shown below. The contact of the auxiliary
relay “RYa” is closed when this operation signal is given.
Picking Up Operation Signal
(Example: Cooling Operation Output is set to terminals 1 and 3 of CN7.)
CN7 Connector
CN7
1
3 P Connector
Indoor Unit PCB
3
Auxiliary Relay
RYa
RY
(4) Picking Up Cooling Thermo-ON Signal [ Output Setting: Code (04) ]
This function is utilized to pick up a thermo-ON signal during the cooling operation. An example of
basic wiring is shown below. The contact of the auxiliary relay “RYa” is closed during thermo-ON in
cooling operation.
Picking Up Cooling Operation Signal
(Example: Cooling Thermo-ON Output is set to terminals 1 and 3 of CN7.)
CN7 Connector
CN7
1
3 P Connector
Indoor Unit PCB
3
Auxiliary Relay
RYa
RY
Summary of Contents for CIDH018B21S
Page 2: ......
Page 10: ...viii SM 18001 rev 1...
Page 15: ...SM 18001 rev 1 1 1 INSTALLATION 1 Installation...
Page 19: ...SM 18001 rev 1 2 1 OPERATION 2 Operation...
Page 22: ......
Page 23: ...SM 18001 rev 1 3 1 TROUBLESHOOTING 3 Troubleshooting...
Page 75: ...MAINTENANCE SM 18001 rev 1 4 1 4 Maintenance...
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Page 173: ...SM 18001 rev 1 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions...
Page 182: ...6 10 SM 18001 rev 1 FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A f t 3 l b...
Page 183: ...SERVICE PARTS LIST SM 18001 rev 1 7 1 7 Service Parts List...
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Page 186: ...2018 Johnson Controls Inc SM 18001 rev 1 Code No LIT 12013047 Revised February 2019...