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6603 Transmission bus busy error
Over error by collision 1) 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 10 minutes.
2) 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 noise for 8 to 10
minutes consecutively.
3) 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.
2) The address transmission from the
unit processor was not normally
transmitted by the hardware of
transmission processor defective.
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2
1
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1) Tha 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 2minutes
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
OC376B--2.qxp 08.1.17 1:15 PM Page 46