Chigo CMV-50V9A-S, Руководство по обслуживанию

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7、
DC inverter multi-split series faulty code manual
DC inverter multi-split series faulty code manual
Malfunction code
：
F1
（
the communication faulty
）
Y
Turn off the power
1
、
Refer to the connecting diagram (Fig. 1),
check whether the wire is connected
correctly.
2
、
Pls screw again to make the wire firm.
Whether the communication wire is
connected wrongly or disentwined.
N
The indoor PCB fault，check whether the communication
circuit on the indoor PCB has been damaged, check
especially some important electric parts ,such as the
optical coupler、voltage stabilizing diode、resistor、
Y
If the indoor PCB has
been
damaged, pls
change it.
N
The outdoor PCB fault
，check whether the communication circuit on the outdoor PCB has been
damaged，check especially some important electric parts ,such as the optical coupler、voltage
stabilizing diode、resistor、PTC,and so on ；Pls replace the PCB if being abnormal (Fig. 3).
The faulty cause
：
1
、
the communication wire is broken off or
connected wrongiy
；、
2
、 the power ground wire is connected
unfirmly；、
3
、
the indoor PCB’s hardware has been damaged
；
Note
：
there are two kinds of connecting technics for the indoor and
outdoor connecting cable
，
Fig 2 shoed the technics before 2007
，
and
Fig 3 showed the technics after 2007
Fig. 2
the indoor and outdoor
connecting cable’s technics
before 2007
Fig. 3 the indoor and outdoor connecting
cable’s technics after 2007