12 Troubleshooting
ERROR LIST
Rank Meaning
System
behaviour
Cause Solution
Power supply surge or
over voltage.
Power supply voltage
dip or interruption.
Power supply fast
transient or burst.
Check the quality of the power
supply.
Bad earth connection. Check that all the earth cables are
correctly connected, expecially the
outdoor pcb's earth cable and the
compressor's earth.
Bad connection
between outdoor and
the heatsink.
Check that the outdoor pcb is
properly connected to the heatsink
and that the screws on the pcb are
properly mounted with the right
torque. Check that there is enough
thermal paste between the pcb and
the heatsink.
EEV damaged. Check the EEV functioning. A
malfunctioning on the expansion
valve may cause liquid flood back on
the compressor.
1 PFC (Power Factor
Controller)
protection:
automatic
protection against
power supply
disturbances and
instabilities.
Compressor and fan
are stopped.
The system restarts
automatically after
3 minutes.
Outdoor pcb damaged. Only if the error is recurrent, change
the outdoor pcb.
Bad communication bus
connection between
outdoor and indoor
unit.
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.
2 Communication
error between the
outdoor unit and
the indoor unit.
Compressor and fan
are stopped after
30 seconds of
missing
communication.
The system restarts
automatically as
soon as the
communication is
recovered.
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.
To Next Page
Loading...
