Switchgear For Jockey Pump - Remote Alarms; Switchgear For Jockey Pump - Functions; Faults, Causes And Remedies - Wilo SiFire Easy Betriebsanleitung

10.11 Switchgear for jockey pump – Remote alarms
Remote alarm
Overload

10.12 Switchgear for jockey pump - Functions

AUTOMATIC MODE SWITCHING
AUTOMATIC MODE
MANUAL START/STOP

11 Faults, causes and remedies

The procedures indicated in the table below must
be carried out ONLY by expert personnel. Never
carry out any work without having carefully read
and understood this manual. Never attempt to
carry out repairs of materials and equipment with-
out a fully and correctly understanding of them.
Faults
The switchgear is off
Motor does not start
Pump works, but does not supply water
or has a low flow/head
Installation and operating instructions Wilo-SiFire Easy
Description
The jockey pump is blocked because of overload
To switch on/off the automatic mode use the selector switch 2 on Fig. 17.
If the switchgear detects the closing of the starting call contact from the pressure switch,
the pump starts. If the pressure is replaced in the plant, the pressure switch opens the con-
tact and the pump stops.
To start/stop the jockey pump manually, switch on/off the manual mode on the selector
switch 2 on Fig. 17.
Causes
No power supply
Out-of-order fuses
Auxiliary circuit failing
No power supply
Short-circuit in winding
Switchgear faulty/wrong connections
Overload
Wrong direction of rotation
Pump cavitation due to excessive suction
depth
Pump cavitation due to wrong diameter
of the suction pipe and valves
Air inlet in the suction line
Valves partially/totally closed
Pump worn out
Pump rotor obstructed
Strainer / filters obstructed
Coupling between pump and motor
worn out
Motor fails to reach nominal speed
or vibrates
Pump bearings are worn out or not
lubricated
Terminals on switch-
gear
90 - 97
If people do not have sufficient knowledge about
the product and the operating logic required by
specific standards respective to the fire extin-
guishing systems, or if people do not have the
needed technical skills, contact Wilo to make reg-
ular maintenance checks.
Remedies
Make sure that the supply line is con-
nected and voltage is present
Check and/or change fuses. Check and/or
replace the switchgear
Check voltage of primary and secondary
circuits in the transformer. Check and/or
replace fuses of the transformer
Check connections and electric switch-
gear
Check windings of motor
Check connections
Check the sizing of the supply line. Make
sure that the pump is not blocked
Invert two of the motor supply phases.
Review calculations to suit pumps NPSHr
Review calculations to suit pumps NPSHr
Make sure that there are no leaks in the
suction line. Check the distance between
the suction points if several pumps are
installed. Fit anti-vortex plates
Open suction and discharge valves.
Check and repair
Check and repair
Check and repair
Check and repair
Check speed
See above
Lubricate with lubricators
English
63