MAHLE AIR-NEX 9380, Service Manual

Page: 39 / 42

en 39 | AIR-NEX 9380/9480 |
Before approach the unit wear the personal protective systems
The responsibility for the effects on people, animals or
the technician who works on the equipment. The suggestions given on the following pages are only indicative and the
manufacturer declines all responsibility for them.
Alarm messages are coded Axxx in the window title bar.
CODE MESSAGE When it occurs
A000 EEPROM NOT WORKING In case of faults in the
EEPROM memory
A001 EEPROM DATA CORRUPT In case of faults in the
EEPROM memory
A002 PRESSURE SAFETY SWITCH
ACTIVATED High pressure is over 18
bar
A003 ADC NOT WORKING After turning on the
equipment
A004 FAN NOT WORKING Only
use
A006 EAXXXX not working Electronic board
problems
A009 SENSORS ERROR: Sensors not connected
or in short circuit
A032 CIRCUIT STILL UNDER
PRESSURE During vacuum,
filling or leak test phase
in vacuum
A033 CIRCUIT LEAKAGE During vacuum,
recharge or leak test
phase
A034 VACUUM LEVEL TOO LOW During
A035 BOTTLE EMPTY During the gas charging
and flushing phase
A036 BOTTLE REFRIGERANT
QUANTITY TOO LOW During the gas charging
and flushing phase
A037 FURTHER REFRIGERANT
CHARGE NOT POSSIBLE During gas
phase
A038 CIRCUIT LEAKAGE OR
DISCONNECTED During flushing phase
Before approach the unit wear the personal protective systems
The responsibility for the effects on people, animals or property resulting from inspection and repair work is entirely attributable to
the technician who works on the equipment. The suggestions given on the following pages are only indicative and the
manufacturer declines all responsibility for them.
essages are coded Axxx in the window title bar. Alarms immediately terminate the procedure and prevent its resumption.
When it occurs Possible situations Possible solutions
In case of faults in the
EEPROM memory EEPROM damaged Change the logic electronic
board
In case of faults in the
EEPROM memory EEPROM damaged Change the logic electronic
board
High pressure is over 18
bar High pressure (due to
pressure on bottle or
circuit to bottle closed)
on refrigerant circuit
between equipment’s
compressor and internal
bottle. Verify
If internal
is over 18 bar, wait for
pressure reduction
disconnect equipment fro
mains, use safety protection,
open equipment and make
sure the valves between
compressor and internal
are open
After turning on the
equipment ADC fault Replacement of logic
electronic board.
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.
Electronic board
problems Faults on the electronics
components or
connections Updates the firmware
Sensors not connected
or in short circuit Sensors disconnected or
damaged. To check electrical
connections or change with
new spare part.
During vacuum, bottle
filling or leak test phase
in vacuum The vehicle A/C system
is pressurized Recover the refrigerant gas
from the vehicle before starting
another vacuum phase.
During vacuum, bottle
recharge or leak test
phase Leakage in the circuit or
in the vehicle fittings. Identify the leak position in the
vehicle or connected system
and have it repaired by trained
and qualified staff according to
local legislation.
During charging phase Vehicle A/C system is
pressurized
notwithstanding the
vacuum phase Identify the leak position in the
vehicle or connected system
and have it repaired by trained
and qualified staff according to
local legislation.
During the gas charging
and flushing phase Refrigerant gas is too
low for the procedure to
be completed Fill the internal tank
During the gas charging
and flushing phase Gas amount in internal
tank less than required Fill the internal tank
During gas charging
phase Hoses not hooked up to
A/C system; tap closed;
vacuum not sufficient;
presence of pressure in
the circuit Caution: before proceeding,
empty out the hoses.
Repeat the recovery procedure
and increase the vacuum
phase duration.
During flushing phase Leakages or
obstructions in the
circuit to be flushed Check the connection to the
A/C system or identify
in the circuit and have it
repaired by trained and
qualified staff according to
local legislation.
property resulting from inspection and repair work is entirely attributable to
the technician who works on the equipment. The suggestions given on the following pages are only indicative and the
Alarms immediately terminate the procedure and prevent its resumption.
Possible solutions
Change the logic electronic
Change the logic electronic
If internal bottle 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 bottle
Replacement of logic
electronic board.
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.
Updates the firmware
To check electrical
connections or change with
spare part.
Recover the refrigerant gas
from the vehicle before starting
another vacuum phase.
Identify the leak position in the
vehicle or connected system
and have it repaired by trained
and qualified staff according to
local legislation.
Identify the leak position in the
vehicle or connected system
and have it repaired by trained
and qualified staff according to
local legislation.
Fill the internal tank
Fill the internal tank
Caution: before proceeding,
empty out the hoses.
Repeat the recovery procedure
and increase the vacuum
phase duration.
Check the connection to the
A/C system or identify the leak
in the circuit and have it
repaired by trained and
qualified staff according to
local legislation.