Error Messages - Bosch ACS 561 Repair Instructions

ACS 561 Service Manual

Error Messages

Refer to the list of error messages:
ACC Pressure Error H
The accumulator pressure transducer is read-
ing accumulator pressure greater than 9.8 bar
(140 psi).
ACC Pressure Error L
The accumulator pressure transducer is read-
ing accumulator pressure less than 77.5 cm-Hg
(30.54 in-Hg) of vacuum. Increase vacuum.
Calibration Error/Calibration Rejected
When the calibration check is performed, the
unit measures the scale weight before and
after the calibration weight has been attached
to the scale. If the difference in weight is
535 ± 14 grams (1.18 ± 0.03 lbs), the calibration
check will pass. However, if the difference is
anything else, the Calibration Error/Calibration
Rejected message will be displayed.
• Check for debris on the magnet assembly
(debris may cause scale binding)
• Verify scale is unobstructed. Check tank
hoses and wiring
• Recalibrate scale
• Make sure to use the authorized calibra-
tion weight
Insufficient Refrigerant Available
If the weight entered leaves less than 1.8 kg
(3.97 lbs) of refrigerant in the internal tank after
charge, the charge function will not start. Add
additional refrigerant to the tank.
Low Recover Pressure, Check Connec-
tions
At the beginning of the recovery process, the
unit is seeing less than 0.7 bar (10 psi) at the
low-side pressure transducer. Verify all connec-
tions before continuing. If the pressure is at 0,
use the vacuum function to clear system.
LS Pressure Error H
The low-side pressure transducer is reading
low-side pressure greater than 9.8 bar (140 psi).
Robert Bosch GmbH
Diagnostics and Testing
LS Pressure Error L
The low-side pressure transducer is reading
low-side pressure less than 77.5 cm-Hg (30.54
in-Hg) of vacuum. Increase vacuum.
Out of Range Error
If the value entered exceeds the recoverable
amount displayed on the standby page, this
error message will be displayed.
Pressure too High for Vacuum
If this message occurs during the evacuation
process, the unit is seeing greater than 0.7 bar
(10 psi) at the Low-Side Pressure Transducer.
Perform recovery before continuing.
If this message occurs during the initial setup
process, the unit is seeing greater than 0.7
bar (10 psi) at any pressure transducer. You
must remove all pressure from the unit before
continuing.
Serial Number Error
The 10-digit serial number for the filter was
entered incorrectly or previously used in this
unit. Re-enter serial number or use new filter.
High Pressure or Scale Error
A high pressure or scale error can be triggered
by factors that cause a premature trip of the
safety circuit.
Vibration or jarring of the tank in combination
with one or more of the following factors can
cause a high scale reading:
• Tank Tare setting
• Tank nearly full or over filled
• Tank Fill setting at the maximum
The best remedy for this is to make the proper
adjustments to tank tare, calibration, etc., but
only if required.
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SP00D00517 2018-07-11