Tab 6-19 GVU & VALVE TEST
Item Function Effect
001 START AST button Starts the engine in astern direction (for reversible engine)
002 STOP button Stops the engine
003 START AHD button Starts the engine in ahead direction
004 CTRL. TR. button Sends a signal for a control transfer to this LDU-20
005 PRINT button Makes a screenshot of the current screen, refer to section
6.8.31 LDU-20 page - SCREENSHOT
006 INDEX button Opens the INDEX page
007 Valve button In test mode - opens and closes the related valve
•
black fill - valve closed
•
no fill - valve open
008 GVU Vent button In test mode - opens and closes the vent valves in the GVU
NOTE: These valves are not shown on the display.
009 GVU Shut-off button In test mode - opens and closes the shut-off valves in the GVU
NOTE: These valves are not shown on the display.
010 On / Off Test Mode button Sets to On and OFF the test mode
NOTE: You only can start the test mode, if the conditions
that follow are OK:
•
Engine at standstill
•
Turning gear is engaged
•
No gas trip or gas interlock avtive
•
No pressure in gas supply
•
Usual range of control air pressure
011 GVU Inert button Starts and stops the inert procedure of the GVU
NOTE: This button is only applicable, if the two indications
Eng. Maint. Switch and GVU Maint. Switch are ac-
tive.
X92DF
AA00-9606-20AAA-043B-A
Operation Manual LDU-20 page - GVU & VALVE TEST
Winterthur Gas & Diesel Ltd.
- 339 - Issue 002 2020-08
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