Argo AEI1G 42 EMX, Technical Data & Service Manual

Page: 23 / 39

23
12 Troubleshooting
ERROR LIST
Rank Meaning
System
behaviour
Cause Solution
Bad communication bus
connection between
outdoor and indoor
units. Check that connections between C1
and C2 on outdoor and indoor
terminal block is consistent (C1
terminals connected together, C2
terminals connected together).
Normal cable used
instead of shielded
cable. Be sure to use a shielded
communication cable for serial
connection.
Wrong communication
address. Be sure to have set the correct
address on every indoor unit. Follow
unit specific installation instructions.
Bad earth connections. Check that earth cables are properly
connected to every terminal.
Check that the shield of the
communication cable is properly
connected to every terminal.
Chech that all internal earth cable are
properly connected.
Communication fuses
blown. Check the communication fuse on
outdoor unit.
Check the communication fuse on
indoor unit (only certain models).
Indoor units not
powered on. Check that the indoor units have
power supply and that the units are
working.
Outdoor or indoor units
pcb out of order. Check that all the pcbs are powered
on.
Be sure that power supply has not
been connected to the
communication terminals.
Check that there are no burnt signes
on the pcbs, in particular close to
communication cables.
1 Communication
error between the
outdoor unit and all
the indoor units. Compressor and fan
are stopped after
30 seconds of
missing
communication.
The system restarts
automatically as
soon as the
communication is
recovered.
Compressor damaged. Check that there is no continuity
between the phases of the
compressor and the earth (dielectric
strength).
2 Error on all the
indoor units. Compressor and fan
are stopped.
The system restarts
automatically as
soon as the error
on the indoor unit is
solved. An error occurred on all
the indoor units of the
system. Follow specific indoor units
troubleshooting.