Carrier MMY-MAP0724FT9UL Service Manual page 82

(3) Connection check of FS (Flow Selector) unit with indoor unit
To Header unit
U1/U2
Cooling/Heating
FS unit
CN01 CN02
3
L N
CN81
2
Indoor unit
(1) Is the indoor/outdoor communication line connected to U1/U2 terminals of the header unit?
(2) Is the control wires connected of FS unit to the connector CN81?
(3) Is the power supply wires connected of FS unit to RS Faston terminal?
(4) In case of the indoor unit wish end-closed connector, Is power supply wire of FS unit connected to
end-closed connector?
NOTE
The above figure does not described all the electric wiring. For details, refer to the Installation Manual of FS unit.
1
Cooling/Heating
CN01
U1 U2 L N
A B
A B
Remote Controller
Main check items
FS unit
CN02
U1 U2
CN81
A B
Indoor unit
A B
4
Remote Controller
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Cooling/Heating
FS unit
CN01 CN02
L N U1 U2
CN81
A B
Indoor unit
A B
Remote Controller
Check