Troubleshooting; By Function And Fault Messages - Bosch ACS 500 Series Repair Instructions

ACS 500
4.

Troubleshooting

4. 1

By function and fault messages

Message
Change filter.
Change vacuum pump.
Not enough R134a.
Please refill.
Used oil bottle full!
Not enough oil.
Please refill.
Not enough UV.
Please refill.
Internal pressure too high!
Printer failure!
Internal tank full.
Warning! Internal tank full.
A/C system on
high pressure.
Recovery phase timeout.
A/C system leaking!
Vacuum failure.
Vacuum not reached!
Calibration fault!
External tank empty or closed val-
ve!
Refill phase timeout.
External tank empty!
Robert Bosch GmbH
Description
Maintenance interval reached. Carry
out maintenance and reset counter (see
Operating instructions 1 689 979 953,
Section 7).
Insufficient refrigerant in internal refri-
gerant flask.
Overpressure in refrigerant flask.
Overpressure in path after compressor.
No paper loaded.
Printer defective.
Maximum permissible filling weight (10
kg) of refrigerant flask reached.
Refrigerant flask weight limit reached.
Absolute pressure in vehicle A/C system
is greater than 1.6 bar
Maximum permissible time (240 min)
for evacuation of vehicle A/C system re-
ached.
Pressure increase during pressure loss
measurement (leak test) in vacuum pha-
se.
Limit value of 100 mbar not reached
10 minutes after start of vacuum phase.
The pressure in the vehicle A/C system
is too high for oil or UV contrast medi-
um injection.
Error in calibration of scale or scale de-
fective.
Attempt to fill internal flask failed.
Maximum permissible time for filling the
vehicle A/C system reached.
External flask for filling is empty.
Problem solving
None
• Top up refrigerant flask.
• Control/display unit is defective. Replace control/display unit.
• Empty used oil tank.
• Force sensor for used oil scale is defective. Replace
force sensor.
• Control/display unit is defective. Replace control/display unit.
• Top up oil tank.
• Top up UV tank.
• Open shut-off valves and cocks on internal refrigerant flask.
• Turn off ACS 500 and wait for 30 minutes. Then restart
the recovery/recycling phase.
• Check non-return valve in inlet hose for internal refrige-
rant flask.
• Check pressure switch.
• Load new printer paper roll.
• Replace printer.
• Reduce quantity of refrigerant in refrigerant flask.
• Check refrigerant scale with calibrating weight. Recali-
brate scale.
• Reduce quantity of refrigerant in refrigerant flask.
• Check refrigerant scale with calibrating weight. Recali-
brate scale.
Start and carry out recovery/recycling phase
Read pressure on manometer.
• Pressure is present:
Solenoid valves for recovery/recycling phase do not
open:
$
Check solenoid valves.
$
Check solenoid valve actuation.
• No pressure present:
Vehicle A/C system not tight
or
leak in processing unit
$
Scan connections for leakage.
$
Check solenoid valve for oil drain.
• Check vehicle A/C system for leaks.
• Check connections and condition of filling hoses.
• Check connections and condition of quick release couplings.
• Check vehicle A/C system for leaks.
• Check connections and condition of filling hoses.
• Check connections and condition of quick release couplings.
• Start vacuum phase.
• Check vehicle A/C system for leaks.
• Recalibrate scale.
• Replace scale.
• Use full external flask.
• Open low pressure (LP) and high pressure (HP) valve
• Open valve cocks on refrigerant flask.
• Check fill quantity in refrigerant flask and top up if neces-
sary.
• Open low pressure (LP) and high pressure (HP) valve
• Open valve cocks on refrigerant flask.
• Check fill quantity in refrigerant flask and top up if necessary.
• Obtain new flask with refrigerant.
en 7
1 689 975 197 (2006-09-22)