Will Not Inject Oil; Will Not Charge - Bosch ACS 561 Repair Instructions

ACS 561 Service Manual
Pressure Decay Leak Test
1. Check the oil drain (S6) and oil return (S7)
solenoids for bleed-through.
2. Verify Vapor check valve on the tank work
in right way avoid refrigerant come back to
accumulator shell.

Will Not Inject Oil

1. Verify the oil injector bottle is securely at-
tached and contains an appropriate amount
of oil.
2. Verify a vacuum has been pulled on the
system.
3. Verify the high-side service hose is properly
attached to the unit without any restrictions
and coupler valve is open.
4. Enter the Output Step Test and activate the
oil inject solenoid (S5).
5. Verify power to the oil inject solenoid (S5).
6. Verify the solenoid coil is opening the sole-
noid properly.
• If not receiving power, check the continu-
ity of the wiring between solenoid and
power board. Repair as needed.
• If the wiring is correct and no power is
being applied to the solenoid, replace the
power board.
7. Verify operation of the oil inject check
valves. Replace as needed.
Robert Bosch GmbH
Diagnostics and Testing

Will Not Charge

There is no component that pumps
refrigerant into a system during the
charge process. The refrigerant flows
in due to a pressure differential. If the
system is not in a vacuum, unit will not
charge.
1. Verify the service hoses are properly
attached to the unit without any restrictions
and coupler valves are open.
2. Verify a deep vacuum has been pulled on
the system being charged.
3. Check that all ISV hoses are properly
installed and ball valve (liquid) is open.
4. INSUFFICIENT REFRIG AVAILABLE will
be displayed if the weight entered leaves
less than 1.8kg (3.97 lbs.) of refrigerant
in the internal tank after charge. If there is
enough refriger ant in the tank check scale
calibration and recalibrate if necessary.
5. Verify the charge (S3) solenoid and liquid
port solenoid (S4), are receiving power and
opening properly.
• If not receiving power, check the continuity
of the wiring between solenoid and power
board. Repair as needed.
• If the wiring is correct and no power is
being applied to the solenoid, replace the
power board.
6. Verify the operation of the charge check
valve. Replace as needed.
If the unit does not complete a full
charge, the compressor and charge (S3)
solenoid are switched on and off to build
tank pressure.
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SP00D00517 2018-07-11