Error/Operation Output : Tcb-Pcin4Ul - Carrier MMY-MAP0724FT9UL Service Manual

7-3-7. Error/Operation Output : TCB-PCIN4UL

Header outdoor unit
Operation
In-operation output: An in-operation indication signal is output as long as at least one indoor unit is in operation
in the line.
Error output: An error indication signal is output if an error occurs in at least one indoor/outdoor unit in the line.
Note 1: Output Relay (K1, K2, K3) Contact Specifications
• Output terminals (OUTPUT1, 2, 3) must satisfy the following electrical rating.
• When connecting a conductive load (e.g. relay coil) to loads K1, K2 and K3, insert a surge killer CR (for an AC
power supply) or a diode for preventing back electromotive force (for a DC power supply) on the bypass circuit.
<Electrical Rating>
208-230 VAC, 10 mA or more, 1A or less
24 VDC, 10 mA or more, 1 A or less (non-conductive load)
C1 Connector cable 1 (CN511)
CN511 Connector on Interface side (green)
K1,K2 Relays
L1 Error indication Lamp
L2 Operation indication Lamp
OUTPUT1 Error output
OUTPUT2 Operation output
PJ20 Connector on optional PCB side
TB1 Terminal block
The optional P.C. board should be connected to the header outdoor unit (U1).
Optional PCB
Outdoor unit
C1
interface PCB
SW16
CN511
PJ20
ON
OFF
1 2 3 4
Locally procured
(See "NOTE")
TB1
L1
1
K1
OUTPUT1
2
L2
3
K2
OUTPUT2
4
5
OUTPUT3
Shield
6
wire
– 76 –
PS
PS