Mitsubishi Electric PUHY-P200 Service Handbook page 246

[ IX Troubleshooting ]
6607
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
(1) System with one outdoor unit
Error
source ad- Error display
dress
Outdoor ME remote
unit (OC) controller (RC)
MA remote
controller (MA)
Indoor unit ME remote
(IC) controller (RC)
MA remote
controller (MA)
LOSSNAY ME remote
(LC) controller (RC)
MA remote
controller (MA)
ME remote ME remote
controller controller (RC)
(RC) MA remote
controller (MA)
HWE10040
Detection
method
No acknowl- (1) Contact failure of transmission
edgement line of OC or IC
(ACK) at IC
(2) Decrease of transmission line
transmis-
voltage/signal by exceeding ac-
sion to OC
ceptable range of transmission
wiring.
Farthest:200 m [656ft] or less
Remote controller wiring:
10m [32ft] or less
(3) Erroneous sizing of transmission
line (Not within the range below).
Wire diameter:
1.25mm
(4) Indoor unit control board failure
No acknowl- (1) When IC unit address is changed
edgement or modified during operation.
(ACK) at RC
(2) Faulty or disconnected IC trans-
transmis-
mission wiring
sion to IC
(3) Disconnected IC connector
(CN2M)
(4) Indoor unit controller failure
(5) ME remote controller failure
(1) The power source of LOSSNAY
No acknowl-
edgement has been shut off.
(ACK) at IC
(2) When the address of LOSSNAY
transmis-
is changed in the middle of the
sion to LC
operation
(3) Faulty or disconnected transmis-
sion wiring of LOSSNAY
(4) Disconnected connector (CN1)
on LOSSNAY
(5) Controller failure of LOSSNAY
No acknowl- (1) Faulty transmission wiring at IC
edgement unit side.
(ACK) at IC
(2) Faulty wiring of the transmission
transmis-
line for ME remote controller
sion to RC
(3) When the address of ME remote
controller is changed in the mid-
dle of the operation
(4) ME remote controller failure
- 237 -
Cause
2
[AWG16] or more
Check method and remedy
Turn off the power source of the
outdoor unit, and turn it on
again.
If the error is accidental, it will
run normally. If not, check the
causes (1) - (4).
Turn off the outdoor/indoor units
for 5 or more minutes, and turn
them on again.
If the error is accidental, they
will run normally.
If not, check the causes (1) - (5).
Turn off the power source of
LOSSNAY and turn it on again.
If the error is accidental, it will
run normally.
If not, check the causes (1) - (5).
Turn off the power source of the
outdoor unit for 5 minutes or
more, and turn it on again.
If the error is accidental, it will
run normally.
If not, check the causes (1) - (4).
GB