Carrier CDII-184R1-0CTR4 Installation & Operation Manual page 67

Do's and Don'ts for data communication
Do's:
Always connect wires in right polarity (all the 'A' terminals together and all the 'B' terminals together.)
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Always use SHIELDED TWISTED PAIR CABLE for data communication.
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Always use good quality cable for data communication.
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Always use correct size of cable (1 mm square) for data communication.
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Always cross power and data Cable at 90º Angle to avoid interference.
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Always keep distance (minimum 6 inches) in power and data communication line if need to run
parallel.
Don'ts:
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Never connect cross connection on communication port A to B point.
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Never short communication ports as it will damage these ports.
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Never connect power supply (high Voltage) on communication ports on PCB, as it will damage these
ports.
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Never tie communication cable with power cable or refrigerant pipes.
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Never lay your cable next to other electrical cables or other electrical sources of interference to avoid
interference in communication.
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Never run Cable in Unsafe Locations.
Never run any data cable beneath the floor.
Replacement of Indoor PRINTED CIRCUIT BOARDS
Part Code
1029778
1029777
1029780
1031798
1031799
1031801
1031800
1031925
Applicable Model
7 HP,11 HP & 14 HP
14 HP
22 HP
67
Description
Touch Based Corded Remote control
2 core wire for Corded Remote control
Cordless Remote Control
Inverter FCU / Indoor PCB for 7 HP
Inverter FCU / Indoor PCB for 11 HP
Inverter CDU PCB for 7 HP,11 HP &14
HP
Inverter FCU / Indoor PCB for 14 HP
Inverter FCU / Indoor PCB for 22 HP