801
REVO-E Heat pump 8 Removal/ installation of components (high-volt. syst.)
8 Removal and installation
of components
(high-voltage system)
8.1 Safety information
Follow the safety information and conditions from
Chapter 1 (see 1.6 ).
The work described in the following requires proof of
the following qualifications:
See 1.6.1.
It is strictly forbidden to work on high-voltage compo-
nents that are under voltage! MORTAL DANGER !!
8.2 Versions of ADA
NOTE:
Most of the work described below is identical for HP and
HP + systems. Wherever there are differences, this is
explicitly stated. The information of some graphics apply
for both versions. These graphics are marked as "exem-
plarily".
8.3 Preparation/follow-up
The use of a suitable and secure lifting device is required
when lifting heavy components.
Use only suitable and technically secure lifting
devices (>100kg).
Do not stand under suspended loads!
8.3.1 High-voltage system
The vehicle’s battery system must be separated by an
authorized (by the vehicle manufacturer) and trained
specialist of high-voltage systems (decommission-
ing). The rules provided by the vehicle manufacturer
must be followed precisely.
Before beginning any work on the high-voltage
system, always make sure there is no voltage present
at the power supply of the frequency converter, using
a voltage tester (CAT IV) suitable for HV systems (Fig.
603 Chap. 6.4)!
8.3.2 Refrigeration section
When working on the refrigerant circuit, the rules for eva-
cuating and filling the REVO-E apply. Replace the sealing
rings from the opened connections and oil them before
replacing (refrigerator oil). If opening the refrigerant circuit
is required, the following preparation and follow-up work
must be completed.
Preparation work
– Vehicle / air-conditioning system powered off (primary
switch / battery disconnection switch)
– If necessary, remove protective cover for the com-
pressor / frequency converter
– Open the side covers of the air-conditioning system
and prop up with rods (attached to cover)
– Remove the coil of the solenoid valve and replace with
permanent magnet
– Siphon refrigerant via high and low pressure connec-
tions on the compressor
– Close openings of components of the refrigerant
circuit with suitable plugs (presents water absorption
by the refrigerant oil)
Follow-up work
– Exchange filter dryers
– Evacuation the air-conditioning system
– Check tightness
ATTENTION:
The maximum pressure is 17 bar, the suction pres-
sure sensor will become damaged otherwise!
– Fill the air-conditioning system with R134a
– Remove the permanent magnet from the magnet
valve and install the coil
– Mount / close the cover
– Test functionality
Torque table, see Attachment A.
Potential risk to health
and life!
Warning!
High voltage!
Caution
Mortal danger!
Warning!
Risk of injury from falling
components of the air-condi-
tioning system!
Warning!
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