– 58 –
[E03 trouble] (Header indoor unit)
[E03 trouble] is detected when the indoor unit cannot receive a signal from the remote controller
(also central controller).
Check A and B remote controllers and communication lines of the central control system U3 and U4.
As communication is impossible, this check code [E03] is not displayed on the remote controller and the
central controller. [E01] is displayed on the remote controller and [C06 trouble] is displayed on the central
controller.
If these check codes generate during operation, the air conditioner stops.
[F29 trouble]
This check code indicates a detection trouble of IC503 non-volatile memory (EEPROM) on the indoor unit P.C.
board, which generated during operation of the air conditioner. Replace the service P.C. board.
∗
When EEPROM was not inserted when power supply turned on or when the EEPROM data read/write
operation is impossible at all, the automatic address mode is repeated. In this time, [C06 trouble] is displayed
on the central controller.
[P31 trouble] (Follower indoor unit)
When the header unit of a group operation detected [E03], [L03], [L07] or [L08] trouble, the follower unit of the
group operation detects [P31 trouble] and then the unit stops.
There is no display of the check code or alarm history of the wired remote controller. (In this model, the mode
enters in automatic address set mode when the header unit detected [L03], [L07] or [L08] trouble.)
(Power ON)
[
S
ET] i
s
di
s
pl
a
yed
on remote controller.
[
S
ET]
goe
s
off.
LED (D501) on indoor
u
nit
P.C.
b
o
a
rd fl
as
he
s
with
1Hz for
a
pprox. 10
s
econd
s
.
Re
b
oot
(Re
s
et)
(Repetition)
(Approx.
3
min
u
te
s
)
(Approx.
1 min
u
te)
