8-5. Diagnosis procedure for each check code
Ye
s
No
Ye
s
Ye
s
Ye
s
No
Ye
s
No
No
No
Ye
s
No
[E01]
e
s
u
a
C
e
d
o
c
k
c
e
h
C
Check code name
e
s
u
a
C
e
d
o
c
k
c
e
h
C
Check code name
Check code
Cause
Check code name
*
The check code is not indicated on the central control device or the 7-segment indication on the outdoor unit.
Ye
s
No
[E02]
[E03]
Communication
trouble
between
the indoor unit and remote
controller (detected on the remote
controller)
Signal transmission
trouble
on the
remote controller
Communication
trouble
between
the indoor unit and remote
controller (detected on the indoor
unit)
1.
Remote controller inter-unit wire
trouble
2.
Indoor
power
trouble
3.
Indoor P
.C. board
trouble
4.
Remote controller address setup
trouble
5.
Remote controller P
.C. board
trouble
Unable to send signals to indoor units
No communication from the remote
controller/communication adapter
Is the
inter-unit wire of
remote controllers (A/B)
normal?
The
communication wiring
between the remote
controller and indoor units
is connected properly
.
Is there no
disconnection or
connector contact
trouble
on
harness out of terminal
block of indoor
unit?
Is a group control
operation?
Is power of each indoor
unit turned on?
Is power applied
to remote controller?
AB terminals:
Approx.
DC18V
Is setup of two
remote controllers
without header remote
controller?
Correct inter-unit cable of
remote controller
.
Connect the wiring properly
.
The transmission circuit in the
remote controller malfunctions.
Replace the remote controller
.
Correct connector connection
and check circuit wiring.
Check power connection
status of indoor unit. (T
urn on
power again.)
Check indoor P
.C. board.
Failure
Replace
Check remote controller P
.C.
board.
Failure
Replace
Change one to header/other to
follower
. (Remote controller
address connector)
The
trouble
is detected when the indoor unit cannot receive the signal from the wired remote controller.
Check the communication wiring from the remote controller
A
and B.
The check code [E03] is not indicated on the remote controller as its communication is down.
However, the code is indicated on the
central controller
of
TCC-LINK.
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