Mitsubishi Electric PURY-(E)P200 Service Handbook page 224

[ 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
(2) Grouping of units in a system with multiple outdoor units
Error
source Error display
address
Outdoor M-NET re-
unit mote controller
(OC) (RC)
MA remote
controller (MA)
BC con- M-NET re-
troller mote controller
(BC) (RC)
MA remote
controller
(MA)
Indoor M-NET re-
unit mote controller
(IC) (RC)
MA remote
controller (MA)
HWE07130
Detection
method
No acknowl- Same cause as that for system
edgement with one outdoor unit
(ACK) at IC
transmission to
OC
No acknowl- Same cause as that for system
edgement with one outdoor unit
(ACK) at IC
transmission to
BC
No acknowl- (1) Same causes as (1) - (5) for sys-
edgement tem with one outdoor unit
(ACK) at RC
transmission to
IC
(2) Disconnection or short circuit of
the transmission line for the out-
door unit on the terminal block for
centralized control line connection
(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 connector
of the outdoor unit is not connect-
ed 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 pow-
er supply switch connector
(CN40) for centralized control.
If an error occurs, after the unit
runs normally once, the following
causes may be considered.
Cause
Total capacity error (7100)
Capacity code error (7101)
Error in the number of con-
nected units (7102)
Address setting error (7105)
- 215 -
Check method and remedy
Same remedy as that for sys-
tem with one outdoor unit
Same remedy as that for sys-
tem with one outdoor unit
1) Turn off the power sources of
the outdoor and indoor units
for 5 or more minutes, and turn
them on again. If the error is
accidental, the will run normal-
ly.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
troubleshooting on other re-
mote 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
GB