5.2 Daily inspection and regular inspection
Inspection
Parts
Inspection
item
Inspection
item
Inspectioncycle
Daily
Year
1
2
Inspection methods
Decision standard
Meter
Whole
Surroundings
Check temperature
of surrounding,
humidity, dust.
Is there abnormal
vibration, abnormal
sound?
Whole
equipment
Power
voltage
Is main circuit
voltage normal?
Whole
Main
circuit
(1) Megger check
Between circuit
terminal and earth
terminal
(2) Are all screws
terminals tight?
(3) Is there any sign of
over - voltage?
(4) cleaning
(1) After you remove connector
J61 from inside the inverter
Take out the wiring of
input/output of inverter
main circuit terminal and
control terminal, measure
between parts shortened
shortened terminal
R,S,T,U,V,W,P,PD,N,RB and
earth terminal with megger
(2) Incremental clamping.
(3) Watch
Refer to 2.1 Installing.
By watching, hearing.
Measurement of inverter
terminal R,S,T phase voltage
Temperature range is
between-10 and 40
degrees. No dew present
and humidity is below 90%
No trouble
Within alternating voltage
allowable change.
Thermometer,
hygrometer,
recorder
Tester,digital
multi-meter
DC500V
class megger
(1) To be over 5M ohm.
(2) (3) No abnormality.
Connection
conductor/
electric line
(1) Is there warp in
conductor?
(2) Is there any damage
of coating of wires?
(1) (2) By watching
(1) (2) No abnormality
Terminals
Is there any damage?
By watching.
No abnormality.
Inverter parts
converter
parts
Resistance check
between each
terminal.
Take out connect of inverter,
measure terminal between
R,S,T and P,N between
U,V,W and P,N with tester x 1
ohm range.
Refer to check method of
5.5 inverter, converter parts.
Analog form
tester
Smoothing
capacitor
(1) Is there any liquid?
(2) Does relief valve
come out? Is there
any swell?
(3) Measure of allowable
static-electricity.
(1), (2) By watching.
(3) Measure with capacity
measure
(1), (2) No abnormality
(3) Over 80% of rated capacity.
Capacity
meter
Relay
(1) Is there abnormal
sound in operation?
(2) Is there damage to
the contacts?
(1) By hearing
(2) By watching
(1) No abnormality
(2) No abnormality
Resistor
(1) Is there any crack,
discoloration of
resistance insulator.
(2) Confirm existance of
breaking of wire.
(1) By watching cementing
resistance. Curl type
resistance.
Take out connection to other
side, measure it with tester.
(1) No abnormality
Error to be within 10% of
Display resistance.
Tester
Digital multimeter
Digital multimeter
rectification type
voltmeter
Control
circuit
protection
circuit
Operation
check
(1) Confirm balance of
each output phase
voltage with inverter
single operation.
(2) Operate sequence
protection moving
test. And no abnormality.
(1) Measure inverter output
terminal U,V,W phase
voltage.
(2) Short or open protection
circuit output of inverter.
(1) Phase voltage balance
200V/400V class is within
4V/8V.
(2) On sequence, to operate
abnormality.
Cooling
system
Cooling fan
(1) Is there abnormal
vibration, abnormal
sound?
(2) Is there loosening of
connecting parts?
(1) Revolve by hands in the
state of tone-on idle.
(2) By watching.
(1) Revolving smooth.
(2) No abnormality.
Display
Display
Meter
(1) Is the LED lamp
illuninated?
(2) Cleaning.
(1) Lamp indicates lamp on
operator.
(2) Cleaning with cloth.
(1) Confirm light.
Is direction value Normal?
Confirm indication value
of board meter.
Satisfy normal value,
control value.
Voltage meter,
current meter
Motor
Whole
Inslated
resistance
(1) Is there abnormal
signal, abnormal
sound?
(2) Is there any abnormal
odour?
(1) Megger check
( terminal collection
earth terminal)
(1) By hearing, feeling,
watching.
(2) Abnormal odour from overheat,
damage etc.
confirmation.
Remove connection to U,V and W
and disconnect motor wiring.
(1)(2) No abnormality.
(1) To be over 5M ohm.
DC500V
Megger
(Note) Lifetime of the capacitors depends on the ambient temperature.
N300 INSTRUCTION MANUAL
Chapter 5 Maintenance, Inspection
Summary of Contents for hiRUN N300-055H
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