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1. Precautions on wiring
1) The control unit can be detached but do not
detach it when unnecessary.
Never combine the control unit with the driving
unit which are different power voltages.
Otherwise the electronic circuit or driving unit
may be failed or damaged.
2) Never use in common the power source of the
pump and that of high power electrical equip-
ment which generates surge voltage. The surge
voltage may cause the damage and failure of
controller.
Caution
Only qualified operator/service staff should be in charge of the related electrical arrangement and control
of the power source. Failure to observe this instruction may result in injury to person or damage to assets.
P
Surge absorbing element
P
Noise-cut transformer
●
Surge voltage
The electronic circuit of the control unit may be
affected by excessively high surge voltage. So,
do not operate the pump near high-power elec-
trical equipment of 220 V or above that gener-
ates high surge voltage.
Under unavoidable circumstances, take either of
the following measures.
(1) Use a surge absorbing element (such as a
varistor with surge resistance of 2000A or
more) at the pump power supply connection.
(2) Use a noise-cut transformer.
4. Electrical Wiring
