No Ack Error - Mitsubishi Electric PURY-(E)P200 Service Handbook

[ 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
(1) System with one outdoor unit
Error
Error dis-
source
play
address
Outdoor M-NET
unit (OC) remote
controller
(RC)
MA re-
mote con-
troller
(MA)
BC con- M-NET
troller remote
(BC) controller
(RC)
MA re-
mote con-
troller
(MA)
Indoor M-NET
unit (IC) remote
controller
(RC)
MA re-
mote con-
troller
(MA)
LOSS- M-NET
NAY remote
(LC) controller
(RC)
MA re-
mote con-
troller
(MA)
M-NET M-NET
remote remote
control- controller
ler (RC) (RC)
MA re-
mote con-
troller
(MA)
HWE07130
Detection
method
No ac- (1) Contact failure of transmission line of OC or IC
knowl-
(2) Decrease of transmission line voltage/signal by ex-
edgement
ceeding acceptable range of transmission wiring.
(ACK) at
Farthest:200 m [656ft] or less
IC trans-
Remote controller wiring:
mission to
10m [32ft] or less
OC
(3) Erroneous sizing of transmission line (Not within the
range below). Wire diameter:
2
1.25mm
(4) Indoor unit control board failure
No ac- (1) When BC controller address is changed or modified
knowl- during operation.
edgement
(2) Faulty or disconnected transmission wiring of BC
(ACK) at
controller
IC trans-
mission to
(3) Disconnected connector of BC controller (CN02)
BC
(4) Faulty control board of BC controller
No ac- (1) When IC unit address is changed or modified during
knowl- operation.
edgement
(2) Faulty or disconnected IC transmission wiring
(ACK) at
RC trans-
(3) Disconnected IC connector
mission to
(CN2M)
IC
(4) Indoor unit controller failure
(5) M-NET remote controller failure
No ac- (1) The power source of LOSSNAY has been shut off.
knowl-
(2) When the address of LOSSNAY is changed in the
edgement
middle of the operation
(ACK) at
IC trans-
(3) Faulty or disconnected transmission wiring of
mission to
LOSSNAY
LC
(4) Disconnected connector (CN1) on LOSSNAY
(5) Controller failure of LOSSNAY
No ac- (1) Faulty transmission wiring at IC unit side.
knowl-
(2) Faulty wiring of the transmission line for M-NET re-
edgement
mote controller
(ACK) at
IC trans-
(3) When the address of M-NET remote controller is
mission to
changed in the middle of the operation
RC
(4) M-NET remote controller failure
Cause
[AWG16] or more
- 214 -
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/in-
door 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) - (4).
Turn off the outdoor/in-
door 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