Mitsubishi Electric PUHY-(E)P300, Service Handbook

Page: 203 / 302

[
IX
Troubleshooting ]
- 194 -
HWE07010 GB
1. Error Code
No ACK abnormality
2. Error definition and error detection method
The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans-
mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.)
The address/attribute appeared on the display on the remote controller indicates the controller which did not provide
the response (ACK).
3. System configuration
(4) Errors that are not limited to a particular system
6607
Error
source ad-
dress
Error dis-
play
Detection
method
Cause Check method and remedy
Address
which
should not
be existed
- - (1) Although the address of M-
NET remote controller has
been changed after the group
is set using M-NET remote
controller, the indoor unit is
keeping the memory of the
previous address. The same
symptom will appear for the
registration with SC.
Delete unnecessary informa-
tion of non-existing address
which some indoor units have.
Use either of the following two
methods for deletion.
(2) Although the address of
LOSSNAY has been changed
after the interlock registration
of LOSSNAY is made using M-
NET remote controller, the in-
door unit is keeping the mem-
ory of the previous address.
1) Address deletion by M-NET re-
mote controller
Delete unnecessary address in-
formation using the manual set-
ting function of M-NET remote
controller. Refer to this service
handbook "4. [2]. Group set-
tings and interlock settings via
the ME remote controller 1. (3)
Address deletion".
2) Deletion of connection informa-
tion of the outdoor unit by the
deleting switch
Note that this switch deletes
all the group information set
via M-NET remote controller
and all the interlock informa-
tion of LOSSNAY and the in-
door unit.
ΠTurn off the power source of
the outdoor unit, and wait for
5 minutes.
ΠTurn on the dip switch (SW2-
2) on the outdoor unit control
board.
ΠTurn on the power source of
the outdoor unit, and wait for
5 minutes.
ΠTurn off the power source of
the outdoor unit, and wait for
5 minutes.
ΠTurn off the dip switch (SW2-
2) on the outdoor unit control
board.
ΠTurn on the power source of
the outdoor unit.