ACS 553, ACS 563 Service Manual
1 689 975 295 2021-04-13 Robert Bosch GmbH
40
Diagnostics and Testing
1. Verify the unit is connected to a known good
power source with a good ground and not
2. Verify the power cable is wired correctly
and the connector has not been damaged.
Replace or repair as required.
3. Turn on the main power switch.
4. If the display does not activate, verify line
voltage is present at the input and output
terminals of the switch.
• If line voltage is not present at power
switch input, check connections between
the power switch and AC connector.
• If line voltage is present at power switch
input, but not at output with switch turned
on, check the fuses (not blown).
• If line voltage is present at both input and
output of switch, check the power supply.
The compressor should be running
during this test. If it does not run, refer to
compressor troubleshooting in the Compressor
section of this manual.
1. Verify the low-side service hose is properly
connected and threaded completely onto
low-side service hose and make sure virgin
tank valve is open.
2. Is there a message on the display stating
the source tank is empty? If so, verify the
source tank has liquid refrigerant and the
source tank valve is open.
3. Verify the source tank and the tank is
positioned to supply liquid refrigerant to the
low-side service hose. Disposable tanks
should be inverted. Attach the low-side
tank.
The recover solenoid (S11) is controlled
the accumulator.
4. Monitor accumulator pressure. If reading
is low, check for restriction upstream of the
accumulator. If pressure is normal, check
compressor oil return solenoid (S13).
5. Check the recover (S11), compressor oil
bleed-through. Repair as needed.
6. Check the compressor for suction and
discharge performance. Refer to the
Compressor Testing procedure in this
section.
7. Remove the filter and inspect all fittings
and gaskets to verify that no obstructions
Verify the scale is calibrated and free to
move.
To Next Page
Loading...
Need help?
General
