Daikin Service Checker TYPE 3.1 Instruction Manual page 12

Procedures
1) Screw tightly the clip-free end of DIII-NET connection cable made up by following the
item (3) of the "Preparation" at DIII-NET terminals(F1, F2) of the Checker TYPE 3. (If
an air-conditioner side is first connected and the resultant short-circuit should occur, it
may cause the failures of the air-conditioner.)
2) Connect the clipped side of the DIII-NET connection cable to the air conditioner.
WARNING : Be sure to connect the clipped side to the transmission terminal board (F1,
F2) of the air conditioner(outdoor unit or indoor unit). If wrongly connected
to power terminals of centralized equipment and the like, it may cause fatal
injuries by electrical shock to human bodies and failures of equipment.
CAUTIONS :
1. In case of connecting to an indoor unit, connect the end of the indoor unit in
2. Do not need to correspond F1, F2 of the transmission terminal board of
Connect the clip-attached side of the DIII-NET connection cable to the transmission terminal
board (F1, F2) of the air conditioner.
If sensor connection is needed, proceed to the section of [2.3 Sensor connection], otherwise,
proceed to the section of [2.4 Switching on of the Checker TYPE 3].
consideration of not creating sub-branching. If sub-branching is created,
communication errors may occur.
the air conditioner to F1, F2 of the Checker TYPE 3 like F1-F1 or F2-F2
respectively.
Chapter 2 Connection to air- conditioner
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DIII-NET terminals