DENTSPLY DP-120H/120V Manual Del Propietario Y Del Operador página 6

TROUBLESHOOTING:
Service of this equipment should be done only by qualified personnel. Failure to comply may result in personnel injury
and/or property damage.
F CTORS FFECTING V CUUM PUMP PERFORM NCE
Your vacuum pump is capable of pulling a vacuum of 740mm Hg (29") at sea level. For each 300 meters (1000') of
elevation the pump's maximum vacuum level is reduced by 25mm Hg (1"). Thus, if the pump is operated in an area 300
meters (1000') above sea level the maximum obtainable output would be 715mm Hg (28").
nother way to look at the vacuum level is by using the barometric pressure at your location. Your vacuum pump will
pull a vacuum that is about 20mm Hg (1.0") less than the barometric pressure on any given day. If the barometer
reading in your area is 750mm Hg (29.5") you may expect a maximum vacuum pump output of 730mm Hg (28.5").
The barometric pressure varies daily.
Problem
Pump doesn't start
Pump doesn't reach
ultimate pressure
Pump is excessively noisy
Pump gets too hot
Cause
a. No main power supply
b. Low voltage
c. Capacitor defective
d. Full vacuum in piping
e. Motor defective
f. Thermal protector switch on
a. Pipes, hoses or connections
leaking
b. Inlet filter or exhaust filter dirty
c. Cylinder or cup seal defective
d. Plate valve defective
e. Vacuum gauge defective
a. Damaged bearing
b. Plate valve defective
c. Cylinder or cup seal defective
d. Vibration being transferred to
enclosure
a. Cooling air supply is obstructed
b. mbient temperature is too high
Solution
a. Check main power
b. Check voltage
c. Check capacitor, replace if necessary
d. Install a vacuum break valve, or order pump
with restart movement from us
e. Return for factory repair
f. Wait for pump to cool down, then try again
a. Check and seal or renew
b. Clean filter cartridge, or replace with a new one
if necessary
c. Renew cylinder or cup seal
d. Replace valve
e. Use correct measuring vacuum gauge
a. Factory repair
b. Replace valve
c. Renew cylinder or cup seal
d. Use suitable anti-vibration mounting
a. Set pump in well ventilated area
b. Set pump up in cooler area
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