Insulation Test; Replacement Parts; Inquiries About Product And Guarantee - IMO VXSM75-1 Instruction Manual

8-4

Insulation Test

Because an insulation test is made in the factory
before shipment, avoid a Megger test. If a
Megger test is unavoidable, follow the
procedure below. Because a wrong test
procedure will cause breakage of the inverter,
take sufficient care.
A withstand voltage test will cause breakage of
the inverter similarly to the Megger test if the
test procedure is wrong. When the withstand
voltage test is necessary, contact IMO.
(1) Megger test of main circuit
1) Use a 500 VDC Megger and shut off the
main power supply without fail during
measurement.
2) If the test voltage leaks to the control
circuit due to the wiring, disconnect all the
control wiring.
3) Connect the main circuit terminals with a
common cable as shown in Fig. 8-4-1.
4) The Megger test must be limited to across
the common line of the main circuit and
the ground terminal (
5) MΩ or a larger value
displayed at the Megger indicates a correct
state. (The value is for a discrete inverter.)
G
L1/R L2/S L3/T DB P1 P(+) N(-)
+
Megger
Fig 8-4-1
(2) Do not perform a Megger test or withstand
voltage test to the insulation test control
circuit of the control circuit. Prepare a high
resistance range tester for the control circuit.
1) Disconnect all the external wiring from the
control circuit terminals.
2) Perform a continuity test to the ground. 1
MΩ or a larger measurement indicates a
correct state.
(3) External main circuit and sequence
control circuit
Disconnect all the inverter terminals so that
the test voltage is not applied.
Maintenance and Inspection
8-5
The life of the part is determined by the type of
the part. The life of the part varies according to
the environment and operating conditions, and
replacement according to Table 8-5-1 is
recommended.
Name of part
Cooling fan
Smoothing
capacitor
Electrolytic
capacitors
on printed
circuit board
Other parts
G).
Table 8-5-1
8-6
(1) When making an inquiry
U V W
(2) Guarantee of the product

Replacement Parts

Standard
replacement
years
3 years
5 years
7 years
-
Inquiries about Product and
Guarantee
Upon breakage of the product, uncertainties,
failure or inquiries, report the following
information IMO Precision Controls Ltd.
a) Inverter type
b) SER NO. (serial number of equipment)
c) Date of purchase
d) Inquiries (for example, point and extent of
breakage, uncertainties,
phenomena, and other circumstances)
The product guarantee term is 5 years after
the purchase or 60 months from the month
and year of production specified on the
nameplate, whichever comes first. However,
the product will not be repaired free of
charge in the following cases, even if the
guarantee term has not expired.
a) The cause includes incorrect usage or
inappropriate repairs or remodeling.
b) The product is used outside the standard
specified range.
c) The failure is caused by dropping,
damage or breakage
transportation after the purchase.
d) The cause is earthquake, fire, storm or
flood, lightening, excessive voltage, or
other types of act of God or similar
events.
Replacement
method and
others
Replace with
a new part.
Replace with
a new part.
(Replace after
inspection.)
Replace with
new circuit
board.
(Replace after
inspection.)
Determine
after inspection.
failure
during
8-5