
55
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 2
minutes, 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 2
minutes, 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
Abnormal point and detecting method
Causes
Check points
Continued to the next page.
From the previous page.