- 290 -
[
IX
Troubleshooting ]
-
(2) Grouping of units in a system with multiple outdoor units
Error Code
Error definition and error detection method
6607
(Contin-
ued)
No ACK abnormality
The error is detected when no acknowledgement (ACK signal) is received after the
transmission. (eg. When the data is transmitted six times in a row with 30 seconds
interval, the error is detected on the transmission side.)
Note: The address/attribute appeared on the display on the remote controller
indicates the controller which did not provide the response (ACK).
Error
source ad-
dress
Error dis-
play
Detection
method
Cause
Check method and remedy
Outdoor
unit
(OC)
M-NET re-
mote con-
troller (RC)
MA remote
controller
(MA)
No ac-
knowl-
edgement
(ACK) at
BC trans-
mission to
OC
Same cause as that for system with
one outdoor unit
Same remedy as that for system with one
outdoor unit
BC control-
ler
(BC)
M-NET re-
mote con-
troller (RC)
MA remote
controller
(MA)
No ac-
knowl-
edgement
(ACK) at IC
transmis-
sion to BC
Same cause as that for system with
one outdoor unit
Same remedy as that for system with one
outdoor unit
Indoor
unit
(IC)
M-NET re-
mote con-
troller (RC)
No ac-
knowl-
edgement
(ACK) at
RC trans-
mission to
IC
(1) Same causes as (1) - (5) for sys-
tem with one outdoor unit
(2) Disconnection or short circuit of
the transmission line for the out-
door unit on the terminal block
for centralized control line con-
nection (TB7)
(3) When multiple outdoor units are
connected and the power source
of one of the outdoor units has
been shut off.
(4) The male power supply connec-
tor of the outdoor unit is not con-
nected to the female power
supply switch connector (CN40).
(5) The male power supply connec-
tors on 2 or more outdoor units
are connected to the female
power supply switch connector
(CN40) for centralized control.
If an error occurs, after the unit runs
normally once, the following causes
may be considered.
Total capacity error (7100)
Capacity code error (7101)
Error in the number of con-
nected units (7102)
Address setting error (7105)
1) Turn off the power sources of the out-
door and indoor units for 5 or more min-
utes, and turn them on again. If the error
is accidental, the will run normally.If not,
check the cause 2).
2) Check the causes of (1) - (5). If the
cause is found, correct it. If no cause is
found, check 3).
3) Check the LED displays for trouble-
shooting on other remote controllers
whether an error occurs.
If an error is found,
-> If an error is found, check the check
code definition, and correct the error.
If no error is found,
-> Indoor unit board failure
Содержание PUHY-P168
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Страница 366: ... 357 IX Troubleshooting ...
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Страница 368: ... 359 X LED monitor display on the outdoor unit board 1 How to read the LED on the service monitor 361 ...
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