Troubleshooting - VWR VP 86 Manual De Instrucciones

1. Place the intermediate plate (2), with valve plates/sealings (7) on the housing, in the position indicated
by the drawing line.
2. Place the head plate (3) with cover (5) on the housing (1), in the position indicated by the drawing line.
3. Check that the head plate (3) is centred by moving it gently sideways.
4. Tighten the screws (4), evenly and diagonally, first gently, then firmly.
Final steps
1. Reconnect suction and pressure line to the pump.
2. Reconnect the pump to the electricity supply.
9.

Troubleshooting

Extreme danger from electrical shock!
 Disconnect the pump power supply before working on the pump.
 Make sure the pump is de-energized and secure.
DANGER
 Check the pump (see Tab. 7 to 10).
Pump produces no flow
Cause
No voltage in the power source
Thermal switch has operated following to
over-heating.
Connections or lines blocked.
External valve is closed or filter is clogged.
Condensate has collected in pump head.
Diaphragm or valve plates/sealings are
worn.
Tab. 7
Flow rate, pressure or vacuum too low
The pump does not achieve the output specified in the Technical data or the data sheet.
Cause
Condensate has collected in pump head.
There is gauge pressure on pressure side
and at the same time vacuum or a pressure
above atmospheric pressure on suction side.
Pneumatic lines or connection parts have an
insufficient cross section.
Leaks occur on connections, lines or pump
head.
Connections or lines completely or partially
jammed.
Fault remedy
 Check room fuse and switch on if necessary.
 Disconnect pump from mains.
 Allow pump to cool.
 Trace cause of over-heating and eliminate it.
 Check connections and lines.
 Remove blockage.
 Check external valves and filters.
 Detach the condensate source from the pump.
 Flush pump (see chapter 8.2.1).
 Replace diaphragm and valve plates/sealings (see
chapter 8.3).
Fault remedy
 Detach the condensate source from the pump.
 Flush pump (see chapter 8.2.1).
 Change the pressure conditions.
 Disconnect pump from system to determine output
values.
 Eliminate throttling (e.g. valve) if necessary.
 Use lines or connection parts with larger cross section if
necessary.
 Check that tubes sit correctly on hose nozzles.
 Replace leaky tubes.
 Eliminate leaks.
 Check connections and lines.
 Remove the jamming parts and particles.
English
11