Wilo SiFire Easy, Инструкция по установке и эксплуатации

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Installation and operating instructions Wilo-SiFire Easy 63
10.11 Switchgear for jockey pump – Remote alarms
10.12 Switchgear for jockey pump - Functions
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.
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.
Remote alarm Description Terminals on switch-
gear
Overload The jockey pump is blocked because of overload 90 - 97
AUTOMATIC MODE SWITCHING To switch on/off the automatic mode use the selector switch 2 on Fig. 17.
AUTOMATIC MODE 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.
MANUAL START/STOP To start/stop the jockey pump manually, switch on/off the manual mode on the selector
switch
2 on Fig. 17.
Faults Causes Remedies
The switchgear is off No power supply Make sure that the supply line is con-
nected and voltage is present
Out-of-order fuses Check and/or change fuses. Check and/or
replace the switchgear
Auxiliary circuit failing Check voltage of primary and secondary
circuits in the transformer. Check and/or
replace fuses of the transformer
Motor does not start No power supply Check connections and electric switch-
gear
Short-circuit in winding Check windings of motor
Switchgear faulty/wrong connections Check connections
Overload Check the sizing of the supply line. Make
sure that the pump is not blocked
Pump works, but does not supply water
or has a low flow/head Wrong direction of rotation Invert two of the motor supply phases.
Pump cavitation due to excessive suction
depth Review calculations to suit pumps NPSHr
Pump cavitation due to wrong diameter
of the suction pipe and valves Review calculations to suit pumps NPSHr
Air inlet in the suction line 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
Valves partially/totally closed Open suction and discharge valves.
Pump worn out Check and repair
Pump rotor obstructed Check and repair
Strainer / filters obstructed Check and repair
Coupling between pump and motor
worn out Check and repair
Motor fails to reach nominal speed
or vibrates Check speed
See above
Pump bearings are worn out or not
lubricated Lubricate with lubricators
om_sifire_easy__4206362_ed02__1801_de_en_fr.book Seite 63 Freitag, 2. Februar 2018 10:23 10