Troubleshooting - Biral HP 95-100-1/1 Notice De Montage Et D'utilisation

10.

Troubleshooting

Warning
Pay attention to the alignment of the bleed valve and the drain plug when draining the
pump. Make sure that nobody can be injured by the escaping fluid and wear the appro-
priate personal protective equipment.
Fault
1. Motor does not start when it is
switched on.
2. Motor safety cut-out trips immediately
as soon motor is switched on
3. Motor safety cut-out occasionally trips
4. Motor safety cut-out has not tripped
but pump fails to run
5. Pump performance irregular
6. Pump runs but does not pump any fluid
7. After being switched off, pump rotates
in opposite direction
8. Leak at the shaft seal
9. Noises
Cause
a) No power supply to motor
b) Fuse blown
c) Motor safety cut-out has tripped
d) Overheat cut-out has tripped
e) Switch contacts or solenoid coil
defective
f) Control-circuit fuse blown
g) Motor defective
a) Fuse blown/circuit-breaker tripped
b) Motor safety cut-out contacts
defective
c) Loose or faulty cable connection
d) Motor winding defective
e) Pump mechanically jammed
f) Motor safety cut-out set too low or
rated for incorrect range.
a) Motor safety cut-out set too low or
rated for incorrect range
b) Power supply voltage intermittently
too high or too low
a) Check points 1a), b, d), e) and f)
a) Intake pressure too low (cavitation)
b) Intake pipe or pump blocked by
contamination
c) Pump draws in air
a) Intake pipe or pump blocked by
contamination
b) Intake or non-return valve stuck in
closed position
c) Leaks in intake pipe
d) Air in the intake pipe or pump
e) Motor rotating in wrong direction
a) Leaks in intake pipe
b) Intake or non-return valve defective
a) Defective shaft seal
a) Cavitation in the pump
b) Pump labouring due to incorrect
height setting of pump shaft
c) Frequency inverter operation
English
Remedy
Connect power supply
Replace fuses
Reset motor safety cut-out
Reset overheat cut-out
Replace contacts or solenoid coil
Repair control circuit
Replace motor
Reset circuit-breaker
Replace motor safety cut-out contacts
Fix or replace cable connection
Replace motor
Remove mechanical blockage
Set motor safety cut-out correctly
Set motor safety cut-out correctly
Check mains power supply
Check fluid level on intake side
Clean intake pipe or pump
Check fluid level on intake side
Clean intake pipe or pump
Repair intake/non-return valve
Repair intake pipe
Check fluid level on intake side
Change direction of rotation
Repair intake pipe
Repair intake/non-return valve
Replace shaft seal
Check fluid level on intake side
Correct the height setting of the pump
shaft
Refer to installation and operating
instructions for frequency inverter
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