7 - Repair
208
Cabin
Diagnostic
Diagnostic mode
The ATC will be provided with a diagnostic procedure in order to perform some checks on the control led devices.
The ATC goes on diagnostic mode by pressing simultaneously the et buttons (during power on of the ATC) with
the blower speed knob in «OFF» position and temperature knob on «LO» position
On the display appear the software version (sequence of four data) for about 10 seconds)
Subsequently is visualized the mixed air temperature value.
The initial configuration is the following:
• AC blower speed off
• Water valve position fully close
• AC compressor off
• Flap in air fresh position
• Auxiliary fan off
In diagnostic mode the «AUTO» symbol is flashing and the hour meter is not update
To exit diagnostic mode, it is necessary to switch off the ATC
When the one of these sensors:
• Outside air temperature sensor
• Mixed air temperature sensor
• Inside air temperature ventilated sensor
• anti-icing temperature sensor
are wrong (open circuited or short circuited), on the display appears an error code (E1 to E8)
Mixed air temperature sensor control
Normally is visualized the mixed air temperature value
The symbol is off
Outside temperature sensor control
Press the button on the display appear the value of the outside temperature for 5 seconds
The symbol is lit when the outside temperature is visualized
Temperature sensor Anomalies Error Code
Outside temperature sensor Not connected or opened E1
Short-circuited E2
Inside air temperature Not connected or opened E3
Short-circuited E4
Mixed air temperature Not connected or opened E5
Short-circuit E6
Anti-ice temperature Not connected or opened E7
Short-circuit E8
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