Airwell Multi Split DUO 50 DCI, Service Manual

Page: 85 / 151

14-4
TROUBLESHOOTING
SM DLF 1-A.1 GB
No Problem AO 5 4 3 2 1
28 Model A No 1 1 1 0 0
29 Model B No 1 1 1 0 1
30 Model C No 1 1 1 1 0
31 Model D No 1 1 1 1 1
*
CN / LSN Units only
14.3.2 Indoor Unit Diagnostics and Corrective Actions
No. Fault Probable Cause Corrective Action
1
Sensor failures
of all types Check sensor connections or
replace sensor
2
Communication
mismatch
Indoor and Outdoor
controllers are with
different versions
Replace Indoor controller
3
No
Communication
Communication or
grounding wiring is not
good.
Check Indoor to Outdoor
wiring and grounding
4 No Encoder
Indoor electronics or
motor
Check motor wiring, if ok,
replace motor, if still not ok,
replace Indoor controller.
5
Outdoor Unit
Fault Outdoor controller
problem Switch to Outdoor
diagnostics.
6
EEPROM Not
Updated
System is using ROM
parameters and not
EEPROM parameters No action, unless special
parameters are required for
unit operation.
7 Bad EEPROM
No action, unless special
parameters are required for
unit operation.
8
Bad
Communication Communication quality
is low reliability Check Indoor to Outdoor
wiring and grounding
9
Using EEPROM
data
No problem. System is
using EEPRRRROM
parameters
14.3.3 Outdoor Unit Diagnostics
The outdoor alarm outputs are defined in the following way
:
No Problem AO 5 4 3 2 1
1 OCT is disconnected Yes 0 0 0 0 1
2 OCT is shorted Yes 0 0 0 1 0
3 CTT is disconnected Yes 0 0 0 1 1
4 CTT is shorted Yes 0 0 1 0 0
5 HST is disconnected (when enabled) Yes 0 0 1 0 1
6 HST is shorted (when enabled) Yes 0 0 1 1 0
7 OAT is disconnected (when enabled) Yes 0 0 1 1 1
8 OAT is shorted (when enabled) Yes 0 1 0 0 0
9 OMT is disconnected (DCI72 / 72Z / 80) Yes 0 1 0 0 1