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6603
Transmission bus busy error
Over error by collision The transmission processor cannot be
transmitted since a short cycle voltage
of the noise etc. mixes on the
transmission line consecutively.
Check whether the transmission line of
the indoor unit, fresh master, lossnay
and remote controller is connected to
the outdoor unit terminal board (TB7)
for centralized controller or not.
Abnormality when the state, which cannot
be transmitted by collision of transmission,
is consecutive for 8 to 10minutes.
The transmission volume increases
and cannot be transmitted since the
wiring method is mistaken and the
routing technique to the terminal
board (TB3) for the transmission line
of the outdoor unit and the terminal
board (TB7) for centralized control
cannot be transmitted.
Check whether the transmission line
with the other refrigerant system of the
indoor unit and lossnay is connected to
the outdoor unit terminal board (TB3)
for transmission or not.
The state that data cannot to be output to
the transmission line by the noise
happens for 8 to 10minutes consecutively.
The share becomes high since the data
exists together to other transmitted
data by a defective repeater (function
which connects and intercepts the
transmission of controlling system and
centralized control system), and it
causes abnormal detection.
Check whether the outdoor unit
terminal board for transmission line
(TB3) and for centralized controller
(TB7) are connected or not.
Note) Address/Attribute displayed on the
remote controller shows the controller
detecting abnormality.
Check the transmitted wave and the
noise on the transmission line.
Signal communication error with
transmission processor
6606
Signal communication error between unit
processor and transmission processor
Note) Address/Attribute displayed on the
remote controller shows the controller
detecting abnormality.
The address transmission from the
unit processor was not normally
transmitted by the hardware of
transmission processor defective.
The data of the unit/transmission
processor was not normally
transmitted due to accidental
disturbance such as noise and
lightening surge.
Turn off power supply of outdoor unit,
indoor unit, and lossnay for 2 minutes
or more at the same time. Then, turn
on power supply. It normally recovers
from the malfunction that happens by
chance. When same abnormality
occurs again, it is defective of the
controller.
Display
Abnormal point and detecting method
Causes
Check points