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Fav 700
Fav 900
Hydraulic Equipment / Additional Valves
Hydraulic Oil Heating
E
Testing
Fav 900 Chassis Number 23/3001 and up
08.12.2000
9690
000001
E
a
1/5
Capitel
Docu-No.
Index
Date
Version
Page
Hydraulic Oil Heating
Single e-box
Bullet-List
Alterations compared to Twin EST Control Modules Version
●
Temperature Switch S040 obsolete
●
Additional Valve MVV/Y033 will be supplied directly
Text-module
Bullet-List
1. Activating Conditions
●
Temperature Sensor from Spool Valve 1.1 indicates < 0
°
C (Temperature can only be read via
FENDIAS ) and...
●
Engine Speed (Speed Sensor B010) indicates more than 650 Rpm for at least 30 second.
Text-module
Bullet-List
2. Procedure
●
Additional Valve MVV/Y033 will be supplied directly from EST Contro Module A002 .
●
Charge Valve MVL/Y012 is supplied by the same EST PIN via Diod Group V005 and Relay K016
●
Charge Valve triggers Load sensing Pump PR to 200 bar.
●
This Pressure generates a flow of approx. 20 l/Min. via Orifice Bl5 toward Return Pressure.
●
This pressure loss generates approx . 8 kW heating energy.
●
Hot oil flushes the Valves stack toward the tank. This justifies the expression "Fluish Valve" wich
appears in FENDIAS.
●
During Oil Heating a distinct noise can be heard.
●
A slight engine speed Loss will be noticed during Oil Heating since the Energy mut be generated by
the Engine.
Bullet-List
3. Eventual Interruption of the Oil Heating.
●
If Engine Speed (Engine Speed sensor B010 )drops below 500 Rpm
●
Heating will automatically resume if Engine Speed reaches for at least 30 Seconds > 650 Rpm.
Bullet-List
4. Duration of Oil Heating . Switch Off conditions
●
If Temperature Sensor within Spool Valve 1.1 indicates >5
°
C (Temperatur only to be read with
FENDIAS r)
●
Approx. 15....20 Minutes will be needed for an initial Oil Temperature of - 20
°
C.
Bullet-List
5. Failure Codes:
●
Only one Failure Code will be possible since Solenoid Valve MVV/Y033 is directly supplied from the
single EST Control Module
●
Failure Code A.1.F1 appears , If the contol Module cannot supply the valve (e.g. discontinued Wire)
or if current exceeds max value of the corresponding output (In this case the control Module limits
the max. Current and deactivates the output)
Bullet-List
6. Tes Instructions and Simulation of Oil Heating
●
Temperature Sensors within Spool Valves cannot be "fooled " Oil Heating can only be simulated
by....
●
supplying simoultaneously both solenoid valves Y012 und Y033.
●
Connect 68pole -Adaptor Module to ESZ Control Module E-Box A002 ; Open both switches wich are
controlling the valves and lead 12 V to the yellow socket e.g. from Pin 56,
●
The hydraulic Part of Oil Heating is a part of the test sequences in the Document "Test Instruction
and Protocol for the Hydraulic functions"