Valeo REVO-E, Workshop Manual

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416
REVO-E Heat pump 4 Function and functional schematics
4.4.10 Gas Charging Mode
Requirements:
–
Clamp 15 active (ignition)
– Vehicle hybrid system active
– The HVAC's power needs are enabled by the signal
"D_AuxiliaryPowerEnabled"
– “D_CabAcGasCgeReq” signal is requested by the
BEA body
– Environmental temperature >5°C
The task of Gas Charging Mode is to activate the
compressor to fill the system with the refrigerant R 134a.
Gas Charging Mode works independently with a small
∆
T
that is sent by the BEA body to the SC620.
This activates the compressor, the double radial blowers /
axial fans of the REVO-E at
minimal power .
Monitoring of the suction pressure is deactivated in
Gas Charging Mode, since the system is normally not
filled when this mode is started and the suction pres-
sure sensor would therefore read a false value in the
vacuum of the system. *
The mode is not part of standard operation and is only to
be used by trained servicing personnel.
The maximum condenser capacity can be limited by the
"D_ElAcMaxPowerAllowed" signal.
Fig. 411 Gas Charging Mode
Double radial blower
Double radial blower
Fresh air
flaps
Sensor
pass. comp.
temperature
Sensor
blow-out
temperature
Request Gas
charging Mode
actuator
Fresh air
flaps
actuator
Analog input
HVIL 1 voltage
Analog input
HVIL 2 voltage
CAN interface
vehicle
SC620
4
5
1
2
3
6
7
24V
1 Solenoid valve
2 Solenoid valve HGA / actu-
ator (in 11123865_only)
3 Suction pressure sensor
4 High pressure safety switch
5 Low pressure safety switch
( not in 11123865_ )
6 4-way reversing valve
7 High pressure sensor
Comp
re
ssor
ac
ti
vate
I/O-A module
Vehicle