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Mitsubishi Electric PURY-P72 Service Handbook page 247

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[ IX Troubleshooting ]
1. Error Code
6607
No ACK error
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
(3) System connected to the system controllers (MELANS)
Error
source
Error display
address
Out-
M-NET remote
door
controller (RC)
unit
System control-
(OC)
ler (SC)
MA remote
controller (MA)
BC con-
M-NET remote
troller
controller (RC)
(BC)
system control-
ler (SC)
MA remote
controller (MA)
HWE0803A
Detection
method
No acknowl-
Same cause as that for system with one
edgement
outdoor unit
(ACK) at IC
transmis-
sion to OC
No acknowl-
Same cause as that for system with one
edgement
outdoor unit
(ACK) at IC
transmis-
sion to BC
- 238 -
Cause
Check method and remedy
Same remedy as that for
system with one outdoor
unit
Same remedy as that for
system with one outdoor
unit
GB
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