Repair manual

General Operation
wc_tx000111gb.fm 39
Make sure the cable does not become excessively bent or twisted, and
does not rub against a structure in a way that might damage it.
If used in a deep-well installation the cable assembly should be
secured every twenty feet.
4.4 Operation
Before starting
4.4.1 Make sure once again that the product is of the correct voltage and
frequency rating.
CAUTION: Using the product at other than rated voltage and
frequency will not only lower its performance but may damage the
product.
Note: Confirm the rated voltage and frequency on the model
nameplate.
4.4.2 Confirm the wiring, supply voltage, circuit breaker capacity, and motor
insulation resistance.
Reference insulation resistance = 20 MΩ or greater.
Note: The reference insulation resistance (20 MΩ or greater) is the
value when the pump is new or has been repaired. For the reference
value after installation see Maintenance and Inspection.
4.4.3 The setting on the circuit breaker or other overload protector should be
made in accord with the rated current of the pump.
Note: See Standard Specifications for the rated current of the pump.
4.4.4 When powering the pump with a generator, do not share the generator
with other equipment.
Test Operation
NEVER operate the pump while it is suspended in the air. The recoil
may result in injury or other major accident.
NEVER start the pump when people are standing next to it. A current
leak can result in electrical shock.
Run the pump for a short time (3–10 minutes) and confirm the
following:
• Using an ammeter (clamp-on type), measure the operating
current at the L1 and L2 phase wires on the terminal.
COUNTERMEASURE: If the operating current exceeds the rated
value, pump motor overload may be a cause. Make sure the pump has
been installed under proper conditions as described in Installation.
WARNING
CAUTION