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Roof Top Air Conditioning System Citysphere
Fault
indica-
Description
tion
Alternator voltage
below 5 V
Defective con-
denser fan
Defective evapo-
rator fan
Battery voltage
above 33 V
Battery voltage
below 17 V
Defective com-
pressor
38
System behavior
Cooling and heating functions are
blocked.
Inoperative cooling function of one or
more air conditioning modules
Inoperative cooling, heating, or ventilat-
ing functions of one or more air condi-
tioning modules
The system shuts down
The system doesn't switch on
Inoperative cooling function of one or
more air conditioning modules
Remedy
• Start engine
• Contact an authorized service point
of the vehicle manufacturer
• Check fan for freedom of movement
• Check wiring
• Contact an authorized service point
• Check fan for freedom of movement
• Check wiring
• Contact an authorized service point
Contact an authorized service point of
the vehicle manufacturer
Contact an authorized service point of
the vehicle manufacturer
• Check fuses, pressure switch, anti-ic-
ing switch and wiring
• Check condenser for contamination
• Contact an authorized service point
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