Will Not Hose Flush; Will Not Print - Bosch ACS 561 Repair Instructions

Diagnostics and Testing
Slow Charge
When there is a slow charge error, "Try again?"
will be displayed if the charge slows and fails
after three (3) attempts.
1. Check and ensure there is a good vacuum
in the vehicle being tested.
2. Verify sufficient pressure in the ISV to
transfer refrigerant.
During the charge process, there must
be a transfer of at least 23g (0.05 lbs) of
refrigerant within 30 seconds.
3. Ensure chargeable weight is greater than
desired charge.
4. Verify the charge couplers are completely
open and the vehicle ports are actuated.
5. Check for debris in any of the charging circuit
solenoids. Clean or replace if necessary.
6. If slow charge persists, there may be a pin
hole leak in the ISV dip tube. Substitute a
known good ISV tank.

Will Not Hose Flush

Flushing the hoses is required if the next vehicle
to be serviced contains a different type of A/C
system oil than the previous vehicle serviced.
1. Verify the service hoses are properly at-
tached to the unit storage ports without any
restrictions and coupler valves are open.
2. Verify the ISV valves are open and tank
hoses are properly connected to the ISV.
3. If there is no pressure on the gauges, refer
to the Will Not Charge troubleshooting pro-
cedures earlier in this section.
4. If the pressure does not clear on the gauges,
refer to the Will Not Recover troubleshooting
procedures earlier in this section.
SP00D00517 2018-07-11

Will Not Print

1. Does the printer have power?
2. Does the printer have paper?
3. If the machine is operating in direct sunlight,
move it or cover the face of the printer and
try again.
Printer Has Power
If the printer has power, check the continuity
of the printer harness between the printer (P3)
and the control board (P15).
• If harness tests good, replace the printer
assembly and retest. If the harness test
fails, replace printer harness.
• If printer still does not print, replace the
control board.
Printer Does Not Have Power
Verify the printer is receiving power at connec-
tor P1. Test for +5 VDC across the RED (pins
1 & 2), and BLACK (pins 3 & 4) wires.
• If voltage is present at P1, replace the
printer assembly and retest. If not, check
for printer power at CBP15.
• If printer power is present at CBP15,
check for continuity of the printer har-
ness. Repair or replace if necessary. If
printer power is not present at CBP15,
replace the control board.
The control board gets its power from the
power board PBP2, through connector
P19 If the control board is not receiving
power, the printer will not function.
Replace the Printer Paper
1. Pull the cover open by inserting a finger into
the pocket in the cover and pull.
2. Remove the paper core.
3. Install the new roll of paper with the end
of the paper at the top of the roll, unrolling
from the back.
4. Feed the paper out the top of the opening,
and close the cover.
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ACS 561 Service Manual
Robert Bosch GmbH