Grundfos 15 BMQE 05A-110, Руководство по продукту и инструкции

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Instructions
EZ Boost TM System
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8.4. EZ Boost controller fault finding chart (continued)
Fault Possible Cause Remedy
6. Even AFTER replacement, the EZ Boost
controller indicates “No contact to
pump”.
a) Numbering of BMQE pump and
EZ Boost controller is different.
• If an BMQE/ EZ Boost controller system
has been given a number, this number
is stored in both the BMQE and EZ Boost
controller.
A new EZ Boost controller or BMQE
may not have a number corresponding
to the number stored in the previous
unit. Therefore, “No contact to pump”
is indicated even if there is no fault.
Give the new system the number used
in the previous unit in order to obtain
correspondence between the number-
ing of the BMQE pump and the EZ Boost
controller. This requires an R100.
Note:
Two systems on the same main
power supply must not have the same
number!
7. The EZ Boost controller indicates
“Over voltage” or “Under voltage”.
a) The supply voltage is unstable or
outside the voltage range specified for
the installed motor type.
• Check:
Possibly over a period of time - that the
supply voltage is according to the values
in Section 5.
Note:
As the voltage is detected at
the motor, allow for the voltage drop in
the pump cable.
8. The EZ Boost controller indicates
“Dry running”.
If the power consumption is lower than the dry-running stop setting and the motor speed
is within 1000 rpm of programmed maximum speed, for an accumulated period of 5
seconds, the pump will be stopped.
a) The pump performance is too high for
the inlet yield.
b) The well screen is blocked.
• Replace the pump with a smaller
pump or reduce the pump performance,
by lowering maximum speed, or
reducing set pressure.
• Check the well capacity and restore
water supply to the well.
9. The EZ Boost controller indicates “Speed
reduction” and “Under voltage”. Speed reduction is activated so as to maintain a reduced performance. When the supply
voltage falls so low that it can no longer supply the necessary current to maintain 3,000
rpm, the pump will be stopped.
a) The supply voltage is unstable or lower
than the voltage range specified for the
installed motor type.
b) The pump is not of the correct type.
c) The voltage drop in the pump cable is
too great.
• Restore correct supply voltage.
• Install correct pump type.
• Replace the pump cable with lower
gauge wires or reduce cable length.
(continued next page)
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