Broken Wire Check Of The Connecting Wires - Daikin VRVII Manual

Troubleshooting by Indication on the Remote Controller
CHECK 13
1. Procedure for checking outdoor-outdoor unit
transmission wiring for broken wires
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 centralized
remote controller, and then conduct continuity checks
between the transmission wiring terminal blocks F1
and F2 of the centralized remote controller using a
multiple meter. 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.
2. Procedure for checking indoor-outdoor unit
transmission wiring for broken wires (for checking the
indoor-outdoor unit transmission wiring of the
"Outdoor Unit C" for broken wires)
Turn OFF the power supply to all equipment, short
circuit between the indoor-outdoor unit terminal F1
and F2 in the "Outdoor Unit C", and then conduct
continuity checks between the transmission wirings F1
and F2 of the "Indoor Unit a" that is farthest from the
Broken Wire Check of the Connecting
Wires
373