Electra DCI Light Commercial Series, Manual

Page: 210 / 230

Troubleshooting
226 Electrical Control System
2.4.2 For the unit with TWINS function(For the super-slim cassette & A5 duct)
2.4.2.1 Communication
malfunction
between master unit and indoor unit
F3 Displayed
F3 Displayed
Communication failure between
master unit and slave unit
Communication failure between
master unit and slave unit
Check the dial switch settings of
master unit and slave unit, is it right?
Check the dial switch settings of
master unit and slave unit, is it right?
Correct the
settings
Correct the
settings
No
Check the PQE communication wires
connection, is it good enough?
Check the PQE communication wires
connection, is it good enough?
Yes
Correct the wire
connections
Correct the wire
connections
No
One of the 2 indoor PCBs is defective.
Connect only one indoor unit to the outdoor
unit separately. The one caused E1 error code
is defective
One of the 2 indoor PCBs is defective.
Connect only one indoor unit to the outdoor
unit separately. The one caused E1 error code
is defective
Yes
Problem is solved
Problem is solved
2.4.2.2 Other malfunction between master unit and indoor unit
One indoor unit displays
”
F4
”
, which means another indoor unit is faulty. Check another indoor unit
’
s error
code and then follow the appropriate solutions to solve the malfunction.