Airwell SX 12 DCI, Service Manual

Page: 46 / 86

CONTROL SYSTEM
SM YAZ318 1-A.1 GB
11-5
3. Each channel that is identified as ‘no communication’ channel will be referred as
STBY unit.
4. The unit resumes its normal operation with only the operative channels.
11.3.3 Temperature Measurements
11.3.3.1 Thermistor failures definition
Thermistor Type a – Disconnected Type b – Shorted
OAT Temp < -30
o
C Temp > 75
o
C
OCT Temp < -35C Temp > 75
o
C
CTT Temp < -30
o
C Temp > 125
o
C
HST Temp < -30
o
C Temp> 125
o
C
OMT Temp < -35
o
C Temp > 75
o
C
ICT Temp < -30
o
C Temp > 75
o
C
RGT Temp < -30
o
C Temp > 126
o
C
RLT Temp < -30
o
C Temp > 126
o
C
11.3.3.2 System responses for different thermistor failure
Thermistor Default value System Reaction
OCT 43°C
OAT 6°C
CTT 43°C Compressor is stopped.
OMT 43°C Compressor is stopped in cooling mode.
HST 43°C Compressor is stopped.
RGT 43°C
RLT 43°C
ICT 43°C
11.3.4 Flash Memory Programming
In order to upgrade the ODU software the auxiliary port will be used. A special application
should be run on a PC to transmit the new firmware. Special programmer (Panasonic)
should be used to update the S/W.