Fujitsu AOUH18LPAS1, Service Manual

Page: 145 / 169

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External Input and Output PCB
• A twisted pair cable (22AWG) should be used. Maximum length of cable is 82 ft (25 m).
• Output voltage: High DC 12 V±2 V, Low 0 V.
• Permissible current: 50 mA
• For details, refer to
"Combination of external input and output" on page 05-16.
• When indicator or other components are connected directly:
Example:
Rotary SW on External Input and Output PCB is set to “1”.
1
2
Connector
(CN310)
LED 1
(Operation status)
PCB
Resistor
Connected unit
+
-
1
2
Connector
(CN311)
LED 2
(Error status)
Resistor
+
-
1
2
Connector
(CN312)
LED 3
(Indoor unit fan
operation status)
Resistor
+
-
• When connecting with a device equipped with a power supply:
Example:
Rotary SW on External Input and Output PCB is set to “1”.
1
2
Connected device 1
Connector
(CN310)
PCB Connected unit Relay
(Operation status)
-
+
1
2
Connected device 2
Connector
(CN311)
(Error status)
-
+
1
2
Connected device 3
Connector
(CN312)
(Indoor unit fan
operation status)
-
+
2-2. External output
- (05-15) -
2. External input and output
FIELD WORKING FIELD WORKING