Daily And Periodic Inspection Items - LG SV-iS5 Instruction Manual

Chapter 8 - Troubleshooting & Maintenance

8.6 Daily and Periodic Inspection Items

Is there any dust?
Ambient
Is the ambient temperature and humidity
Environ- adequate?
ment
All
Equipment Is there any abnormal oscillation or noise?
Input Is the input voltage of the main circuit
Voltage normal?
Megger check (between the main circuit and
the ground)
Are any fixed parts removed?
All
Are there any traces of overheating at each
component' s cleaning?
Is the conductor rusty?
Conductor/
Is the wire coating damaged?
Wire
Terminal Is there any damage?
IGBT Check the resistance between each of the
Module terminals.
/Diode
Module
Is there any liquid coming out?
Is the safety pin out, and is there any
Smoothing
swelling?
Capacitor
Measure the capacitance.
Is there any chattering noise during
operation?
Relay
Is there any damage to the contact
Is there any damage to the resistor
insulation?
Resistor Is the wiring in the resistor damaged (open)?
Is there any unbalance between each
phases of the output voltage?
Nothing must be wrong with display circuit
Operation
Check after executing the sequence protective
operation.
Is there any abnormal oscillation or noise?
Is the connection area loose?
Cooling
Fan
Is the displayed value correct?
Meter
Are there any abnormal vibrations or noise?
All
Is there any unusual odor?
Insulation Megger check (between the output terminals
Resistor and the ground terminal)
☞
Note: Values in ( ) is for the 400V class inverters.
Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. +372 604 1423 Fax +372 604 1447 morek@morek.eu
Period
Inspection
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο Ο
Ο
Ο
Inspection Method
Refer to the precautions .
Use sight and hearing.
Measure the voltage between the
terminals R, S, T.
Undo the inverter connections short
the terminals R, S, T, U, V, W and
measure between these parts and the
Ο
ground.
Tighten the screws.
Visual check.
Visual check
Visual check
Undo the inverter connection and
Ο
measure the resistance between R, S,
T ⇔ P, N and U, V, W ⇔ P, N with a
tester.
Visual check
Measure with a capacitance-
measuring device.
Auditory check
Visual check
Visual check
Disconnect one of the connections
and measure with a tester.
Measure the voltage between the
output terminals U, V and W.
Short and open the inverter protective
circuit output.
Turn OFF the power and turn the fan
by hand.
Tighten the connections.
Check the meter reading at the
exterior of the panel.
Auditory , sensory, visual check.
Check for overheat and damage.
Undo the U, V and W connections and
Ο
tie the motor wiring.
188
Measuring
Criterion
Instrument
Temperature: Thermometer
-10~+40 no ,
freezing. Hygrometer,
Humidity: Under Recorder
50% no dew
No abnormality
Digital Multi-
Meter/Tester
Over 5MΩ DC 500V
class Megger
No fault
No fault
No fault
(Refer ' How to Digital Multi-
Check Power Meter/Analog
Components" ) Tester
No fault Capacitance
Over 85% of the Measuring
rated capacity Device
No fault
No fault Digital Multi-
Error must be Meter/Analog
within ±10% the Tester
displayed
resistance.
The voltage Digital Multi-
balance between Meter/Rectifyi
the phases for ng Voltmeter
200V (800V) class
is under 4V (8V).
The fault circuit
operates according
to the sequence.
Must rotate
smoothly.
No fault
Check the Voltmeter/
specified and Ammeter etc.
management
values .
No fault
Over 5MΩ 500V class
Megger