Pressure Decay Leak Test (For R1234Yf Only); Printer Kit Installation - Bosch ACS 553 Service Manual

ACS 553, ACS 563 Service Manual
Pressure Decay Leak Test
(for R1234yf only)
This function is available on Maintenance menu.
To ensure a safe, environmentally friendly,
and economic operation, the unit performs a
software-controlled self-test in regular intervals
every 10 days (for R1234yf only).
1. Follow the on-screen prompts to connect
the hose service couplers to the storage
connectors on the side of the machine.
Open the hose couplers by turning the
collars clockwise.
2. Select OK icon to start the test.
3. The machine performs a self-recovery and
displays:
RECOVER IN PROGRESS
4. The machine performs a 30-second vacuum
test and displays:
VACUUM CHECK IN PROGRESS
• If the vacuum test fails, the machine will
prompt to check for leaks.
5. Once the machine passes the vacuum test,
a controlled pressure is applied to its internal
components. The machine displays:
PRESSURE CHECK IN PROGRESS
6. Pressure is held for five minutes and
monitored for decay. There is not a default
pressure value. The machine monitors the
pressure reached during the pressurization.
Minutes and seconds count down on the
display.
• If an acceptable pressure decay is detected,
the machine recovers refrigerant until
-0,44 bar and returns to the Maintenance
Menu, ready for normal operation.
• If an unacceptable pressure decay is
detected, the machine will prompt to
check for leaks. Take the machine to an
authorized service center for repair.
NOTE: Leak Check may also be selected at
any time from the Maintenance Menu. If you
decline to run the Leak Check when prompted,
the machine will continue to prompt for the test
at each power-up until the test is completed
(for R1234yf only).
Robert Bosch GmbH

Printer kit installation

WARNING: Disconnect the unit from
the power source before beginning
service work. Incorrect use or
connections can cause electrical
shock.
For the printer installation follow instructions
hereby:
1. Switch off the machine.
2. Remove the printer protective cover.
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4
3
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Figure 1-9. Print installation
3. Remove the four screws (3) from the control
panel (2).
4. Tilt the control panel (2) upwards the front
of the unit.
5. Connect the RS232 cable (5) and the power
supply cable (6) to the suitable connectors
on the printer (1).
6. Fit the printer (1) and fix it by means of the
proper fixing tabs (4).
7. Connect the RS232 cable (5) to the P18
connector of the control board.
8. Connect the power supply cable (6) to the
P15 connector of the control board.
9. Tilt the control panel (2) down and secure
with four screws (3).
10. Connect again the machine to the power
supply system and switch it on.
11. The printer is ready to be used.
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Introduction
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1 689 975 295 2021-04-13