78
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
2minutes, 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 recovers
normally at the malfunction that
happens by chance. When same
abnormality occurs again, it is defective
of displayed address and attribute.
· Remote controller line···(12m)
(See page 50-57 for details)
3) Decline of transmission line voltage
and signal by unmatched kind of line.
Kind···Shield wire-CVVS,CPEVS
No shield ···VCTF, VCTFK,
CVV, CVS, VVR, VVF, VCT
wire diameter···1.25
e
or more
4) Miss operation of origin controller,
which happens by chance.
1
2
Display
Meaning and detecting method
Causes
Check points
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