V&T Technologies Co., Ltd.
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Chapter 8 Routine Repair and Maintenance
113
Chapter 8 Routine Repair and Maintenance
The application environment (such as temperature, humidity, dust and powder, wool, smoke and
oscillation), burning and wearing of internal devices and other factors may increase the possibilities of
inverter failure. To reduce the failures and prolong the service life the inverter, it needs to conduct routine
repair and periodic maintenance.
Note
Note
1. Only the personnel receiving professional training can dismantle and replace the inverter components.
2. Prior to inspection and maintenance, please make sure that the power supply to the inverter has been
shut down for at least ten minutes or the CHARGER indictor is OFF, or there may be risks of electric
shock (the inverter with power level of E5
−
H
−
4T11G or above has CHARGER indicator).
3. Do not leave metal components and parts in the inverter, or it may damage the equipment.
8.1 Routine Maintenance
The inverter shall be used under the allowable conditions as recommended in this manual and its routine
maintenance shall be conducted as per the table below.
Item
Inspection Contents
Inspection Means
Criteria
Operating
Environment
Temperature
Thermometer
−
10 ~ +40ºC
Derated at 40 to 50ºC, and the rated
output current shall be decreased by
1% for every temperature rise of 1ºC.
Humidity
Humidiometer
5 ~ 95%, no condensing
Dust, oil, water and drop Visual check
There are no dust, oil, water and
drop.
Vibration
Special test instrument
3.5mm, 2~ 9Hz;
10m/s
2
,9~ 200Hz; 15m/s
2
,200~
500Hz
Gas
Special test instrument,
smell check and visual
check
There are no abnormal smell and
smoke.
Inverter
Overheat
Special test instrument
Exhaust normal
Sound
Listen
There is no abnormal sound.
Gas
Smell and visual check
There are no abnormal smell and
smoke.
Physical appearance
Visual check
The physical appearance is kept
intact.
Heatsink fan ventilation
Visual check
There are no fouling and wool that
block the air duct.
Input current
Amperemeter
In the allowable operating range.
Refer to the nameplate.
Input voltage
Voltmeter
In the allowable operating range.
Refer to the nameplate.
Output current
Amperemeter
In the rated value range. It can be
overloaded for a short while.
Output voltage
Voltmeter
In the rated value range.
Motor
Overheat
Special test instrument
and smell.
There are no overheat fault and
burning smell.
Sound
Listen
There is no abnormal sound.
Vibration
Special test instrument
There is no abnormal oscillation.