Hidrostal A2Q - Measures after completion of work

Faults | 9
Hidrostal AG 45 / 49
Error description Cause Remedial action Personnel
Pump is not running Main switch is OFF Set main switch to “ON” position Instructed persons
(operators)
Thermal overcurrent trip
responded or is not
properly connected
Check overcurrent trip Qualified electricians
Motor damaged Check the motor, repair it if
necessary
Qualified electricians
Service centre
Voltage too low Check voltage Qualified electricians
ON level not reached;
defective sensor or
switch
Check fluid level; check function
of level switch, replace it if
necessary
Trained personnel
Pump is very noisy Speed too high in
frequency inverter (FI)
operation
Check the speed selected at the
FI; reduce it if necessary
Instructed persons
(operators)
Air penetrates at
suction side
Check suction line and/or fluid
level
Instructed persons
(operators)
Air or gas in conveyed
medium
Check the conveyed medium for
air or gas
Instructed persons
(operators)
Suction head too high Check suction head Instructed persons
(operators)
Insufficient suction
pressure with hot
liquids
Check suction pressure, increase
if necessary
Trained personnel
Suction pipe
insufficiently
submerged
Check immersion depth of
suction pipe
Instructed persons
(operators)
Motor damaged Check the motor, repair it if
necessary
Qualified electricians
Service centre
Loose anchoring Check the anchoring; correct if
necessary
Trained personnel
Impeller brushes
against suction cover
Check the impeller clearance,
readjust it if necessary. See
chapter Check/readjust
impeller clearance [▶32]
Trained personnel
Pump runs to the right
of the pump
characteristic curve
Check operating data and
operating conditions
Trained personnel
9.3 Measures after completion of work
The following steps are to be executed following completion of maintenance
work and prior to switch-on of the system:
1. Check all screw connections that were previously loosened for tightness.
2. Check if all protective devices and covers that were previously removed
are properly installed again.
3. Ensure that all tools, materials and other equipment used have been
removed from work area.