Adjustment Of Termination Resistor (Plug); If Link Wiring Is Not Used - Panasonic U-8ME1E81 Service Manual

3. Auto Address Setting
3. Auto Address Setting

Adjustment of Termination Resistor (Plug)

Communication error will occur if improper adjustment is made.
• When connecting the centralized control system, it is necessary to adjust the termination resistor (terminal plug: CN67).
Even if no connection is made, confirmation is required for VRF systems.
• Termination resistor is placed on the outdoor unit control PCB.
• Centralized control system: Intelligent Controller (CZ-256ESMC2)
• If the termination resistor of this inter-outdoor unit control wiring is 1 refrigerant system, short-circuit 1 location (remains
unchanged at shipment).
If there are more than 2 refrigerant systems, short-circuit 2 locations (remains unchanged at shipment).
In order to stabilize communication, 2 short circuit locations shall be at both sides (remains unchanged at shipment).
Open-circuit the refrigerant systems except for 2 locations mentioned above.
More than 3 short circuit locations of the termination resistors are prohibited (remains unchanged at shipment).
1
• There is no necessary to adjust the termination resistor (short circuit remained at shipment) because VRF systems for
combination of sub outdoor units are not connected to the control wiring.

If link wiring is not used

2
Short-circuit 1 termination resistor plug of the unit No.1 main outdoor unit (remains unchanged at shipment).
Centralized
Outdoor unit
control
system
3
Indoor unit
4
Remote controller
Outdoor unit control PCB
Short-circuit 1 termination resistor plug (remains unchanged
5
at shipment).
6
7
8
System Controller (CZ-64ESMC2)
Schedule Timer (CZ-ESWC2)
ON/OFF Controller (CZ-ANC2)
P-AIMS Basic software (CZ-CSWKC2)
Unit
No. 1
(Main)
Inter-outdoor unit
control wiring
Inter-unit control wiring
1-1 1-2
Unit
No. 2
(Sub)
Inter-outdoor unit
control wiring
1-3 1-10
Remote control
communication wiring
Setting of terminal plug (CN67)
Unit No. 1 (Main) : short-circuit (at shipment)
Unit No. 2 (Sub) : short-circuit (at shipment)
Unit No. 3 (Sub) : short-circuit (at shipment)
CN67
SHORT
1-10
2WAY SYSTEM
3WAY SYSTEM
Address Settings
Address Settings
Unit
No. 3
(Sub)
2
3
4
5
6
7
8