High voltage oil flush – MAHLE RTI RHS980C User Manual
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HIGH VOLTAGE OIL FLUSH
The RHS980C can be configured from the factory to have the ability to perform an internal oil flushing
process to eliminate cross contaminations between PAG oil used in a conventional R-134a system and POE
oil used in HIGH VOLTAGE HYBRID systems. The POE oil acts as a lubricant, but more importantly the POE
oil is required to keep the HIGH VOLTAGE system isolated from the chassis. If the HYBRID’s system
becomes conductive, the service technician can be at risk of electrical shock. During the HIGH VOLTAGE
OIL FLUSH process the residual PAG oil from previous services will be flushed from the HIGH - low side
couplers and hoses along with the corresponding internal passages of the RHS980C unit.
IMPORTANT – THE HIGH VOLTAGE OIL FLUSH PROCESS MUST BE PERFORMED
BEFORE A SERVICE ON A HYBRID VEHICLE WITH THIS MACHINE IS CONDUCTED!
IT IS THE SERVICE TECHNICIANS RESPONSIBILITY TO UNDERSTAND THE RISKS
INVOLVED IN SERVICING A HIGH VOLTAGE HYBRID A/C SYSTEM, AS WELL AS
DETERMING THE PROPER OIL REQUIRED FOR THE HYBRIDS A/C SYSTEM TO ENSURE
ITS ELECTRICAL ISOLATION FROM THE VEHICLES CHASSIS IS MAINTAINED.
With units configured for the High Voltage Oil Flush there will be a screen illustrated below that will start the
High Voltage Oil Flush process. The manual oil injection bottle and connections will NOT be present next to
the oil drain bottle. The High Voltage Oil Flush configured unit will also be shipped with a HIGH -LOW side
adapter so that the hoses can be connected to flush residual oil from previous services. To get to the HIGH
VOLTAGE OIL FLUSH FEATURE, follow the procedure below.
W E I G H T = # # . # L B
A U T O M A T I C
S T A R T ?
W E I G H T = # # . # L B
R E C Y C L E
S T A R T ?
W E I G H T = # # . # L B
V A C U U M
S T A R T ?
W E I G H T = # # . # L B
C H A R G E
S T A R T ?
W E I G H T = # # . # L B
F I L L C
Y
L I N
D
E
R
S T A R T ?
The screen shown to the left will be displayed. Press
the ▼ key to scroll to the next screen.
Press ▼ key.
Press ▼ key.
Press ▼ key.
Press ▼ key.