Bosch ACS 653 Repair Instruction page 6

DO NOT USE COMPRESSED AIR TO PRESSURE TEST OR LEAK TEST THE MACHINE
OR VEHICLE AIR CONDITIONING SYSTEM. Mixtures of air and refrigerant can be
combustible at elevated pressures. These mixtures are potentially dangerous and may
result in fire or explosion causing personal injury and/or property damage.
HIGH VOLTAGE ELECTRICITY INSIDE THE MACHINE HAS A RISK OF ELECTRICAL
SHOCK. Exposure may cause personal injury. Disconnect the power before servicing the
machine.
NEVER LEAVE THE MACHINE LIVE IF AN IMMEDIATE USE IS NOT SCHEDULED.
Disconnect the electrical supply before a long period of inactivity or before internal
maintenance is performed. To ensure that unauthorized personnel cannot run the machine,
use the Lockout / Tag Out feature.
NOTE (for R1234yf only): To minimize the risk of ignition, the unit software guided leak check
is periodically performed otherwise the unit will lock. For same purpose, also hardware features
such as ventilation fan monitoring system, suitably located vents on cart bottom (R1234yf is
heavier than air) and sealed power switching circuits are present.
CAUTION: The machine is not intended to operate with oils classified as flammable
or hazardous according to EN 1272/2008 (CLP).
CAUTION : To prevent equipment damage,
TO PREVENT CROSS-CONTAMINATION, USE THIS MACHINE WITH R1234yf
(ACS 663) OR R134a (ACS 653) REFRIGERANT ONLY. The machine is equipped with
special connectors to recover, recycle, and recharge only R1234yf ( ACS 663) or R134a
(ACS 653) refrigerant. Do not attempt to adapt the machine for another refrigerant. Do not
mix refrigerant types through a system or in the same container; mixing of refrigerants will
cause severe damage to the machine and the vehicle air conditioning system.
Do not use refrigerants other than those indicated on the technical data plate. It is also
recommended to buy it from specialized companies that guarantee its good quality.
DO NOT USE THIS MACHINE OUTDOORS DURING RAIN OR HIGH HUMIDITY.
Protect the machine from conditions that may cause electrical failure or other hazards
relating to ambient interaction.
DO NOT USE THIS MACHINE IN DIRECT SUNLIGHT. Position the machine far from
heat sources, such as direct sunlight which can cause excessive temperatures. The use
of this machine under normal environmental conditions (10°C to 50°C) keeps pressures
under reasonable limits. Make sure the machine does not exceed the operating temperature
indicated on the technical data plate.
DO NOT USE THIS MACHINE IN AREAS WHERE THERE IS A RISK OF EXPLOSION.
Place the station on a flat surface and in sufficient lighting conditions; lock the front wheels
and do not subject them to vibration.
Further information regarding health and safety may be obtained from the refrigerant
manufacturer.
SP00D00624 2021-04-08
ACS 653, ACS 663 Service Manual
6
Robert Bosch GmbH