Fault Message That Can Occur During The Vacuum Phase; Faults During Refrigerant Preparation; Non-Condensing Gases Are Not Drained; Faults During Filling With Refrigerant - Bosch ACS 810 Repair Instructions

en | 26 | ACS 810 | TROUBLESHOOTING AND ANALYSIS
11.2.3 Fault message that can occur during the
vacuum phase
"A/C SYSTEM FULL"
¶
Check the pressure at the pressure gages M 1 and
M 2.
 Pressure above 0.3 bar, perform recovery.
 Pressure below 0.3 bar, adjust pressure sensor
P 1.
"
If the message is still displayed, replace the pressure
sensor.
"
If the message is still displayed, replace the computer
PCB.
11.3

Faults during refrigerant preparation

1. Check hose connections on the internal refrigerant
cylinder.
2. Valves V1, V2, V3 and V4 must be open.
3. Check EV7 for leaks.
4. Check filter F1 for impurities and clean with
compressed air.
5. Check the expansion valve (3) for the correct
pressure value (2 - 2.3 bar).
6. Check whether the internal refrigerant circuit is
soiled or clogged.
i
If the compressor does not start, make sure that a
supply voltage is connected to the compressor. If
no voltage is applied, check the supply leads and
the switching operation of the compressor relay.
11.4 Non-condensing gases are not
drained
¶
Mechanically test drain valve V6.
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11.5

Faults during filling with refrigerant

11.5.1 Vehicle air conditioning system cannot be
filled
If the refrigerant pump works, but does not charge the
A/C system, it is necessary to:
1. Check hose connections on the internal refrigerant
cylinder.
2. Valves V1, V2, V3 and V4 must be open.
3. HP and LP valves must be open.
4. Check the calibration of the scale.
i
Ensure that the refrigerant scale are not blocked.
i
You must ensure that the control PCB applies
the set weight value; if not, check whether the
refrigerant cylinder contains sufficient refrigerant
for the filling process.
i
Check whether EV6 and EV3 are supplied with
power. If so, they must be replaced. If they are not
supplied, the connecting cables and the control
PCB must be checked.
If the refrigerant pump does not work, it is necessary
to:
1. Check the condition of the flying fuse (800 mA
delayed) inside the power box.
i
Be sure that there is a 230 Volt during the filling
phase, but only after the switching off of the EV10
solenoid valve.
i
Be sure that there is 12 Volt (DC) direct current
on the refrigerant pump relay coil; be sure are 230
Volt on the outlet contacts. In case one of the two
voltages is absent, replace the control PCB.
11.5.2

Other fault messages

Please see chapter 9.2
Robert Bosch GmbH