Main Component Descriptions - Bosch ACS 753 Repair Instructions

Parts and Components

MAIN COMPONENT DESCRIPTIONS

12V POWER SUPPLY— Provides 12 Volts
to power the circuit boards, all solenoids, and
sensors requiring 12V power.
BOTTLE, OIL DRAIN — Recovers the used oil
during the oil drain process.
BOTTLE, UV DYE INJECT — Stores UV dye
for injection into the A/C system.
BOTTLE, OIL INJECT 1 (PAG) — Stores PAG
oil for injection into the A/C system.
BOTTLE, OIL INJECT 2 (POE) — Stores POE
oil for injection into the A/C system.
BREAKER, CIRCUIT— Protects the unit from
drawing too much current. If tripped, unit is
completely inoperative.
CALIBRATION WEIGHT— Calibration standard
that attaches to magnet under scale assembly.
Used to verify scale calibration.
CHECK VALVE— Allows refrigerant, air, or oil
flow in one direction only.
COMPRESSOR— Moves refrigerant from the
A/C system being serviced into the ISV on the
unit.
COMPRESSOR CAPACITOR— Used for
starting the compressor, helping reduce the
initial high current demand required by the
compressor on start-up.
COMPRESSOR OIL SEPARATOR — Removes
the compressor oil from the refrigerant leaving
the compressor. New oil is returned to the
compressor when the oil return solenoid
receives power.
CONTROL PANEL— User interface panel,
display, and keypad for controlling refrigerant
recovery, recycling and recharging.
DISPLAY/CONTROL BOARD— Front display
panel and main control of the unit.
FAN— Keeps the compressor from exceeding
its normal operating temperature. The fan runs
whenever the power switch is turned on.
FILTER DRYER, SPIN-ON— Used to remove
moisture and particles from refrigerant. Must be
changed every time 150 kg (R1234yf) - 68 kg
(R134a) of refrigerant is recovered.
SP00D00609 2018-03-26
ACS 753, ACS 763, ACS 863 Service Manual
GAUGE, HIGH-SIDE— Monitor high-side
pressure of the vehicle being serviced.
GAUGE, LOW-SIDE— Monitors low-side
pressure of the vehicle being serviced.
HIGH-PRESSURE CUTOUT SWITCH— Switch
opens at 22.5 ± 0.7 bar (326 ± 10 psi) and resets
at 17 ± 0.7 bar (250 ± 10 psi). If pressure in
the high side of the system exceeds 22.5 bar
(326 psi), the switch opens stopping all functions.
INTERNAL STORAGE VESSEL (ISV)—
Storage tank where the recovered and recycled
refrigerant is stored. Vapor, liquid, and air purge
access is on-top of tank.
KEYPAD— Touch-pad providing the user
interface for controlling, entering date, or
navigating through the operation of the unit.
MAIN MANIFOLD ASSEMBLY— Internal
manifold assembly that contains solenoids,
check valves and switches. Refrigerant will
flow through the manifold assembly for proper
distribution.
MUFFLER, AIR EXHAUST— Disperses
excessive air from the ISV. Provides effective
reduction of objectionable air exhaust noise.
OIL DRAIN ASSEMBLY— Provides a means
for attaching the oil drain bottle to the unit.
INJECTION MANIFOLD ASSEMBLY — Allows
oil/dye to be injected into the vehicle A/C system
during the charge mode.
FLUSH + N2H2 MANIFOLD ASSEMBLY—
Internal manifold assembly that contains
solenoids and check valve. N2H2 will flow
through the manifold assembly for proper
distribution.
MUFFLER, N2H2 EXHAUST— Disperses
excessive N2H2 from the A/C system. Provides
effective reduction of objectionable N2H2
exhaust noise.
ORIFICE, UNION— Fitting used to reduce the
flow rate.
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Robert Bosch GmbH