MAHLE ACX380, Руководство по обслуживанию

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APPENDIX 6 – TROUBLE SHOOTING
Before approach the unit wear the personal protective
The responsibility for the effects on people, animals or property resulting from inspection and repair work is entirely attri
the technician who works on the equipment. The suggestions given on the following pages are only indicative and
manufacturer declines all responsibility for them.
MALFUNCTION POSSIBLE CAUSE
During the recovery phase
there is an evident refrigerant
leak from the exhausted oil
container.
The leak test is negative. Dirt inside the Oil
discharge solenoid valve.
During the automatic cycle it
is not possible to recover the
oil. Oil loading cell out of
calibration or defective.
Vacuum pump emits
disturbing vibrations Defective vacuum pump
After the vacuum phase the
leak test has a negative result. This may occur when the
vacuum time is too
4-5 minutes.
Hoses emptying not
completed with system under
pressure
Gas leakage from internal
cylinder/tank
or compressor
malfunction
Hoses emptying not
completed.
With pressure at 0 bar (empty
circuit) Pressure sensor not
calibrated
First filling procedure not
correctly carried out. Mistake during procedure.
Alarm A 002 Pressure switch
intervention (compressor does
not start) High pressure inside the
recovery group
Check valve before
condenser blocked
Manual valve before
internal bottle closed
| ACX380/480
TROUBLE SHOOTING
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 attri
the technician who works on the equipment. The suggestions given on the following pages are only indicative and
manufacturer declines all responsibility for them.
POSSIBLE CAUSE POSSIBLE SOLUTION
Dirt inside the Oil
discharge solenoid valve. 1. Cleaning of the solenoid valve OUT – S.
2. Check of the gasket efficiency.
3. calibrate pressure sensor
Oil loading cell out of
calibration or defective. 1. Calibration of the exhausted oil scales.
2. Replace if needed.
Defective vacuum pump Vacuum pump replacement
This may occur when the
vacuum time is too short, When a vacuum time less than 20 minutes is set, the following message
appears:
“Less than 20 minutes of vacuum do not guarantee the execution of a
correct procedure. Continue?”.
The solution is keeping to the 20 minutes vacuum time.
Gas leakage from internal
or compressor
check for leaks from valves R.
or check compressor functioning
Pressure sensor not Altitude compensation
and/or full pressure calibration
Mistake during procedure. Altitude compensation
and/or full pressure calibration
High pressure inside the
recovery group
Check valve before
blocked
before
closed
Verify if internal bottle pressure level is over 18 bar, if yes: wait for
pressure reduction, or uncondensable gases discharge.
If not: use personal safety protections, open equipment and check:
1) Internal bottle “refrigerant pressure” is >= 18 bar inside menu
“Maintenance” and submenu “unit values view”)
pressure reduction or uncondensable
2) Check if inlet valve (red valve knob)
•
Status closed - open the valve and wait
the pressure reduction
•
Status open – wait for pressure reduction
3) If not fixed with previous actions - it is necessary to
investigate the following items
•
the pressure safety switch status
•
the check-valve (one-way valve on condenser)
4) Measure the pressure between the compressor and
condenser HP side of recovery group (use a ¼ SAE hose with
connector to open internal valve and a pressure gage)
5) if pressure is
•
<18 bar the pressure switch need to be
not activated (circuit closed)
•
>18 bar the pressure switch need to be
activated (circuit open)
i.e. if pressure is 10 bar and pressure switch is activated (circuit open)
change it with a new original pressure switch
ACX380/480 | 40 en
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
When a vacuum time less than 20 minutes is set, the following message
“Less than 20 minutes of vacuum do not guarantee the execution of a
The solution is keeping to the 20 minutes vacuum time.
pressure level is over 18 bar, if yes: wait for
uction, or uncondensable gases discharge.
If not: use personal safety protections, open equipment and check:
“refrigerant pressure” is >= 18 bar inside menu
“Maintenance” and submenu “unit values view”) – wait for
open the valve and wait
the pressure reduction
wait for pressure reduction
it is necessary to
safety switch status
way valve on condenser)
Measure the pressure between the compressor and
condenser HP side of recovery group (use a ¼ SAE hose with
connector to open internal valve and a pressure gage)
pressure switch need to be
not activated (circuit closed)
>18 bar the pressure switch need to be
activated (circuit open)
i.e. if pressure is 10 bar and pressure switch is activated (circuit open)