Tab 6-36 GAS LEAK 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 Gas Pr. button Opens the GAS PRESSURE page
006 INDEX button Opens the INDEX page
007 Open/Close Sealing Oil Valve but-
ton
Opens or closes the sealing oil valves
008 Aux. Elect. SO Pump start button Starts and stops the auxiliary electrical servo oil pump manual-
ly
NOTE: You only can start the tests (item 009 to 011), if the conditions that follow are OK:
•
Engine at standstill
•
Turning gear is engaged
NOTE: Each test is OK, if during the test period of 1000 seconds the pressure drop is less than
700 mbar.
009 Fuel Side Test Req. button Starts the automatic gas leak test of the pipes on the fuel side,
if the conditions show OK
010 Exh. Side Test Req. button Starts the automatic gas leak test of the pipes on the exhaust
side, if the conditions show OK
011 GVU - ENG Test Req. button Starts the automatic gas leak test of the pipes between the
gas valve unit (GVU) and the engine, if the conditions show
OK
012 Cancel Test button Stops the running gas leak test
013 Test status Shows data about the three gas leak tests
014 Pipes schematic Shows the status of the related valves:
•
black fill - valve closed
•
no fill - valve open
X92DF
AA00-9606-38AAA-043B-A
Operation Manual LDU-20 page - GAS LEAK TEST
Winterthur Gas & Diesel Ltd.
- 375 - Issue 002 2020-08
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