Mitsubishi Electric CMB-WP1016V-GA1 Service Handbook page 144

[ VIII 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
ME re- ME remote
mote con- controller (RC)
troller MA remote
(RC) controller (MA)
HWE1410A
Detection
method
No acknowl- (1) Same causes as (1) - (4) for
edgement system with one outdoor unit
(ACK) at IC
transmission to
RC
(2) Disconnection or short circuit
of the transmission line for
the outdoor unit on the termi-
nal block for centralized con-
trol 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 con-
nector of the outdoor unit is
not connected to the female
power supply switch connec-
tor (CN40).
(5) The male power supply con-
nectors on 2 or more outdoor
units are connected to the fe-
male power supply switch
connector (CN40) for central-
ized control.
If the problem recurs after
normal operation is restored,
the problem is caused by one
of the following factors:
- 135 -
Cause
Total capacity error
(7100)
Capacity code setting
error (7101)
Error in the number of
connected units (7102)
Address setting error
(7105)
Check method and remedy
1) Turn off the power source of
LOSSNAY for 5 or more min-
utes, and turn it on again. If the
error is accidental, it 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) Same cause as that for indoor
unit described in 3)
GB