Broken Wire Check Of The Relay Wires - Daikin RXQ12AHR Service Manual

SiAF341904E

6.10 Broken Wire Check of the Relay Wires

CHECK 15 1. Procedure for checking outdoor-outdoor unit transmission wiring for broken wires
Part 6 Service Diagnosis
On the system shown below, turn OFF the power supply to all equipment, short circuit
between the outdoor-outdoor unit terminal F1 and F2 in the "Outdoor Unit A" that is farthest
from the central remote controller, and then conduct continuity checks between the
transmission wiring terminal blocks F1 and F2 of the central remote controller using a
multimeter. If there is continuity between the said terminal blocks, the outdoor-outdoor unit
transmission wiring has no broken wires in it.
If there is no continuity, the transmission wiring may have broken wires. With the outdoor-
outdoor unit terminal of the "Outdoor Unit A" short circuited, conduct continuity checks
between the transmission wiring terminal blocks F1 and F2 of the unified ON/OFF controller.
If there is no continuity as well, conduct continuity checks between the outdoor-outdoor unit
terminal of the "Outdoor Unit E", between the outdoor-outdoor unit terminal of the "Outdoor
Unit D", between the outdoor-outdoor unit terminal of the "Outdoor Unit C", ... in the order
described, thus identifying the place with continuity.
If the place with continuity can be identified, there may be broken wires in places before the
said place with continuity.
Check
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