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Daikin VRV III-S RXYMQ36 48PVJU Service Manual Page 226

60 hz.
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SiUS34-907
CHECK 8
Broken Wire Check of the Connecting Wires
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 parts 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 multi-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 parts 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 parts of the "Outdoor Unit E", between the
outdoor-outdoor unit terminal parts of the "Outdoor Unit D", between the outdoor-outdoor unit terminal parts
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 parts 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 "Outdoor Unit C" using a multi-meter. If there is continuity
between the said transmission wirings, 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
parts of the "Outdoor Unit C" short-circuited, identify the place with continuity in the transmission wiring of the
"Indoor Unit b", transmission wiring of the "Indoor Unit c", and transmission wiring of the "Indoor Unit D" in the
order described. If the place with continuity can be identified, there may be broken wires in places before the
said place with continuity.
wiring for continuity.
If there is continuity, the
indoor-outdoor unit
transmission has no
broken wires in it.
Troubleshooting
Check the transmission
Indoor-outdoor Unit
Transmission Wiring
Short-circuit
between the
outdoor-outdoor
unit terminal
parts.
Outdoor-outdoor Unit
Short-circuit between
Transmission Wiring
the indoor-outdoor unit
terminal parts.
Unified ON/OFF controller
Centralized remote controller
Check the transmission
wiring for continuity.
If there is continuity, the
outdoor-outdoor unit
transmission has no broken
wires in it.
217

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  • cp shukla Feb 16, 2016 06:50:
    RXYQ18PAY6 service manual & vrv Fulform