Finish Thompson LS-55IIE - Manual (Page 23)

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JETVAC ATTACHMENT TROUBLESHOOTING TIPS:
PROBLEM
: JetVac will not turn on.
POSSIBLE CAUSES:
 JetVac is improperly wired. Verify the electrical power and connections to the JetVac and Still. When wired for
automatic mode, the Still must be operating for the JetVac to operate.
 Improper cooling water flow to the condenser. If the flow switch in the Still is not engaged, the JetVac will not
operate (when wired in automatic mode).
PROBLEM: Low vacuum readings.
POSSIBLE CAUSES:
1.
Air Leak – Disconnect the vacuum from the still. Place a hand over the end of the stainless steel hose and turn
on the vacuum. If you get good vacuum, check for:
 Leaks around the lid of the Still. Check the Still’s lid gasket, and/or tape the lid to seal.
 Leaks at the quick-connector. Inspect the gasket inside of the female quick-connector on the metal braided
hose. Replace the gasket if damaged.
 Loose fitting on the unit.
2. If vacuum is still low, check:
 The pumps reservoir for low liquid level. Top off the liquid level in the JetVac’s pump reservoir with clean
solvent.
3. Debris carried over during the distillation cycle can block:
 The Y-strainer, check valve, aspirator, or pump causing a loss of vacuum. Look for signs of debris in the
pump reservoir. If debris is found, the aspirator may be clogged. Suction 4 - 5 gallons of clean solvent
through the stainless steel hose.
4. An O-ring failure on the vacuum adjustment valve.
5. Chemical attack of the internals in the vacuum relief solenoid.
6. Loose compression fittings in the system.