77
3) When the cause of displayed address
and attribute is on the remote controller
side
1) When operating with multi refrigerant
system indoor units, the indoor units
transmits the signal to the remote
controller after the other refrigerant
system outdoor unit is turned off or
turned on again in 2minutes, and
detects abnormality.
(The indoor unit detects when there is no
reply (ACK) on transmitting from the indoor
unit to the remote controller unit.)
2) Contact failure of remote controller
or indoor unit transmission line
3) Indoor unit transmission connector
(CN2M) disconnection.
4) Sending/receiving signal circuit
failure in the indoor unit or remote
controller.
4) When the cause of displayed address
and attribute is on the fresh master side
1) When synchronized operating with
other refrigerant system fresh master,
the indoor units transmits the signal to
the fresh master after the fresh master
and same refrigerant system outdoor
unit is turned off or turned on again in
2minutes, and detects abnormality.
(The indoor unit detects when there is no
reply (ACK) on transmitting from the indoor
unit to the fresh master.)
2) Contact failure of fresh master or
indoor unit transmission line
3) Indoor unit or fresh master
transmission connector (CN2M)
disconnection.
4) Sending/receiving signal circuit
failure in the indoor unit or fresh
master.
5) When the cause of displayed address
and attribute is on the lossnay side
1) When the lossnay power supply is
Off, the indoor unit detects abnormality
at signal transmitting to the lossnay.
(The indoor unit detects when there is no
reply (ACK) on transmitting from the indoor
unit to the lossnay.)
6607
Display
Meaning and detecting method
Causes
Check points
From the preceding page.
OC183E--3.qxp 10.5.6 3:05 PM Page 77
