KNF SC 950, Руководство по эксплуатации

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Vacuum Pump System SC/SEM/SH/SR950 Troubleshooting
Translation of original Operating Instructions, English, KNF 125549-125552 07/18 55
Vacuum pump system as a whole
Problem Cause Solution
Leaks in hose connection.

Check hoses are sitting correctly on
hose nipples.

Replace any leaky hoses.

Replace any damaged hose nipples.

For ordering numbers see chapter
11, page 59.
Only SC/SEM 950:
Leaks in venting valve.

Temporarily close the ventilation
connection (Fig. 2/ 18 , p. 13 or
Fig. 4/ 15 , p. 17). If this stops the
leak, leaks are present in the venting
valve. In this case:

Flush the venting valve:
1. Close the gas inlet (Fig. 2/ 19 or
Fig. 4/ 16 ).
2. If necessary for safety reasons:
Connect inert gas to ventilation
connection. Observe the safety
instructions in chapter 3.
3. Run the vacuum pump system (SC
950 in evacuation mode) at 100%
pump capacity.
4. Re-open the gas inlet.

If problem persists, contact KNF
Service.
Condensation in pump
head.

Open gas ballast and flush pump
heads

Dry system with fresh air or, if
necessary for safety reasons, with
an inert gas:
1. Using inert gas: Connect inert gas
source with gas inlet (Fig. 2/ 19 ,
p. 13 or Fig. 4/ 16 , p. 17, Fig. 5/ 14 ,
p. 19 and Fig. 6/ 13 , p. 21) and start
system up in evacuation mode
(100% capacity). Observe the safety
instructions in chapter 3.
2. Using air: Open gas line (Fig. 2/ 19 ,
p. 13 or Fig. 4/ 16 , p. 17, Fig. 5/ 14 ,
p. 19 and Fig. 6/ 13 , p. 21) to the
surrounding environment and start
system up in
evacuation mode
(100% capacity).
3. Close the gas inlet after 30 seconds,
and leave the vacuum pump system
running for 30 seconds under
vacuum.
4. Repeat this process 3–5 times.

If this problem occurs frequently,
place the vacuum pump system at a
higher level than the vacuum
chamber.