− 168 −
Yes
No
Yes
Yes
Yes
No
No
No
[E18]
Check code Check code name
Communication trouble between
indoor header and follower
Cause
Regular communication between indoor header and
follower is unavailable.
Are remote
controller inter-unit wires
(A/B) normal?
Is there any
disconnection of
connector or wiring from
terminal block of
indoor unit?
Is group
control operation
executed?
Are powers of all indoor
units turned on?
Check indoor address.
Correct remote controller
inter-unit wire.
Correct connection of
connector.
Check circuit wire.
Check power connection
status of indoor unit. (Turn
on the power again.)
Check indoor P.C. board.
Failure
Replace
Correct indoor address.
Sub-code: 00: No header unit 02: Two or more header units
No
Yes
Yes
No
[E19]
[E20]
Sub-code: 01: Connection of an outdoor unit in another line 02: Connection of an indoor unit in another line
Check code
Check code
Cause
Check code name
Header outdoor unit quantity
trouble
1. Misconnection of inter-unit wire between indoor
and outdoor
2. Outdoor I/F P.C. board trouble
Check code name
Unit connected to other line
during automatic address
Cause
When starting automatic indoor address, a device in
another line is connected.
Are not
communication lines
(U1, U2) between indoor
and outdoor connected
to multiple outdoor
units?
Is
communication
line between indoor and
outdoor connected to
one unit per 1
system?
Connect communication line
between indoor and outdoor
to one unit per 1 system.
Connect communication line
between indoor and outdoor.
Reference)
The outdoor unit connected with communication wires (U1, U2) between
indoor and outdoor is automatically recognized as the header unit.
Check I/F board.
Separate the connection between the lines following the address setup method.
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