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Figure 29 Assemble the fitting at the pump head
If the pump does not achieve the ultimate pressure
In case the diaphragms and valves have been replaced, a run‐in period of several hours is
required before the pump achieves its ultimate vacuum.
If pump does not achieve the ultimate total pressure:
Check hose connectors between pump heads and manifolds for leaks.
If necessary recheck pump chamber.
Table 9 Troubleshooting
Fault
Pump fails to start or
stops immediately.
A746‐03‐885A ‐ Maintenance
Possible cause
Supply voltage is missing or too
low?
Only 24 V DC version:
Control signal for motor speed is
missing?
Pressure in outlet pipeline too
high?
Only pumps with dual‐voltage
motor:
Motor overloaded?
The motor fuse has blown
Page 32
Remedy
Check or connect supply
voltage.
Check control signal.
Remove blockade in line, open
valve.
Manual reset is necessary.
Switch off the pump or isolate
the equipment from mains.
Wait approx. five minutes
before restarting the pump.
Identify cause of failure and
eliminate.
Replace fuse (refer to Table
page 6). Identify and eliminate
cause of failure.
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