56
2) When synchronized operating with
other refrigerant system lossnay,
the indoor units transmits the signal
to the lossnay after the lossnay and
same refrigerant system outdoor
unit is turned off or turned on again
in 2 minutes, and detects
abnormality
3) Contact failure of lossnay or indoor
unit transmission line
4) Indoor unit transmission connector
(CN2M) disconnection
5) Sending/receiving signal circuit
failure in the indoor unit or lossnay
6) When the controller of displayed
address and attribute is not recognized
1) Since the address switch was
changed with the current passed,
the unit in the last address does not
exist.
2) Since the fresh master/lossnay
address are changed after
synchronized setting of fresh
master/lossnay by the remote
controller, abnormality is detected
at transmitting from the indoor unit.
1) Transmission repeats the failure by
the noise etc.
6608
6607
No response
2) Decline of transmission voltage and
signal by transmission line
tolerance over
Check the transmission wave and
noise on the transmission line.
Though there was a replay (ACK) of
having received signal from the other
side, it is the abnormality when the
response command does not return.
The sending side detects the abnormality
continuously six times every 30 seconds.
Note) Address/Attribute displayed on the
remote controller shows the controller,
which did not response.
· The furthest point···200m
Turn off power supply of outdoor unit,
indoor unit and lossnay for 2minutes or
more at the same time. Then, turn on
power supply again. It normally
recovers fom the malfunction that
happens by chance. When same
abnormality occurs again, it is defective
of displayed address and attribute.
· Remote controller line···(12m)
(Refer to 8-3.)
3) Decline of transmission line voltage
and signal by unmatched kind of line
· Shield wire-CVVS, CPEVS
Wire diameter···1.25
A
or more
4) Mis-operation of origin controller,
which happens by chance.
Display
Abnormal point and detecting method
Causes
Check points
From the previous page.
