MAHLE ACX150, Service Manual

Page: 44 / 202

EN | 43 | ACX150/250 | Diagnostic
© MAHLE
Alarm messages are coded Axxx in the window title bar.
Alarms immediately terminate the procedure and prevent its resumption.
CODE
MESSAGE When it can
occur Possible
causes Actions
A000 EEPROM NOT
WORKING
In case of
faults in the
EEPROM
memory EEPROM
damaged Change the logic
electronic board
A001 EEPROM
DATA
CORRUPT
In case of
faults in the
EEPROM
memory EEPROM
damaged Change the logic
electronic board
A002 PRESSURE
SAFETY
SWITCH
ACTIVATED
High pressure
is over 18 bar High pressure
(due to pressure
on vessel or
circuit to vessel
closed) on
refrigerant
circuit between
equipment’s
compressor and
internal vessel. Verify
If internal vessel
pressure level is over
18 bar, wait for
pressure reduction
disconnect
equipment from the
mains, use safety
protection, open
equipment and make
sure the valves
between compressor
and internal vessel
are open
A003 ADC NOT
WORKING
After turning on
the equipment ADC fault Replacement of logic
electronic board.
A004 FAN NOT
WORKING
Only during R-
1234yf use Fan not working
properly
(stopped or
fan’s rpm not
adequate) Stop use of the
equipment
check fan
connections and
if necessary, change
fan and related
cables with a new
one
change logic
electronic board with
new one.
A009 SENSORS
ERROR
Sensors not
connected or in
short circuit Sensors
disconnected or
damaged. To check electrical
connections or
change with new
spare part.
A032 CIRCUIT During The vehicle A/C Recover the