Mitsubishi PUMY-P100YHM Technical & Service Manual page 48

From the previous page.
Display
Abnormal point and detecting method
3) When the cause of displayed address
6607
and attribute is on the remote controller
side
(The indoor unit detects when there is no
reply (ACK) on transmitting from the indoor
unit to the remote controller unit.)
4) When the cause of displayed address
and attribute is on the fresh master side
(The indoor unit detects when there is no
reply (ACK) on transmitting from the indoor
unit to the fresh master.)
5) When the cause of displayed address
and attribute is on the lossnay side
(The indoor unit detects when there is no
reply (ACK) on transmitting from the indoor
unit to the lossnay.)
Causes
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.
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
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.
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
1) When the lossnay power supply is
Off, the indoor unit detects abnormality
at signal transmitting to the lossnay.
48
Check points
Continued to the next page.