Broken Wire Check Of The Relay Wires - Daikin RXSQ24TAVJU Service Manual

SiUS331708EA

5.14 Broken Wire Check of the Relay Wires

CHECK 15
Procedure for checking indoor-outdoor unit transmission wiring for broken wires
Turn OFF the power supply to all equipment, short circuit between the indoor-outdoor unit terminal
F1 and F2 in outdoor unit, and then conduct continuity checks between the transmission wiring F1
and F2 of "Indoor Unit a" farthest from outdoor unit using a multimeter. If there is continuity between
the transmission wiring, the indoor-outdoor unit transmission wiring has no broken wires in it.
If there is no continuity, the transmission wiring may have broken wires. With the indoor-outdoor
unit terminal of outdoor unit short circuited, identify the areas with continuity in the transmission
wiring of "Indoor Unit b", transmission wiring of "Indoor Unit c", and transmission wiring of "Indoor
Unit d" in the order described.
If the areas with continuity can be identified, there may be broken wires in places before those
areas.
Service Diagnosis
Check the transmission
wiring for continuity.
If there is continuity, the
indoor-outdoor unit
transmission has no
broken wires in it.
Short circuit between
the indoor-outdoor unit
terminal parts.
Indoor-outdoor Unit
Transmission Wiring
Check
Outdoor
unit
272