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.
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 V5-H-4T11G/15L 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/s2,9~ 200Hz; 15m/s2,200~ 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.
|
8.2 Periodic Maintenance
It needs to perform periodic inspection on the inverter once every three to six months according to the application environment and work conditions.
Item
|
Inspection Contents
|
Inspection Means
|
Criteria
|
Inverter
|
Main circuit terminal
|
Screwdriver/sleeve
|
The screws are tightened and the cables are kept well.
|
PE terminal
|
Screwdriver/sleeve
|
The screws are tightened and the cables are kept well.
| |
Control circuit terminal
|
Screwdriver
|
The screws are tightened and the cables are kept well.
| |
Reliability of internal connections and connectors
|
Screwdriver and hands
|
Connection is firm and reliable.
| |
Expansion card connector
|
Screwdriver and hands
|
Connection is firm and reliable.
| |
Mounting screws
|
Screwdriver/sleeve
|
The screws are tightened.
| |
Cleaning the dusts and powders
|
Cleaner
|
There are no dusts and wools.
| |
Internal foreign objects
|
Visual check
|
There are no foreign objects.
| |
Motor
|
Insulation test
|
500VDC megameter
|
Normal
|
8.3 Component Replacement
Different types of components have different service lives. The service lives of the components are subject to the environment and application conditions. Better working environment may prolong the service lives of the components. The cooling fan and electrolytic capacitor are vulnerable components and shall be conducted routine inspection as per the table below. If any fault occurs, please conduct immediate replacement.
Vulnerable Components
|
Damage Causes
|
Solutions
|
Items for Routine Inspection
|
Fan
|
Bearing wear, blade aging
|
Change
|
The fan blade has no cracks and rotates normally. The screws are tightened.
|
Electrolytic capacitor
|
Ambient temperature is relatively high and electrolyte volatilizes.
|
Change
|
There are no electrolyte leakage, color change, crack and shell inflation. The safety valve is normal.
Static capacity is equal to or higher than the initial value times 0.85.
|
8.4 Insulation Test
Since the inverter has undergone insulation test upon its ex-factory, the user shall not perform such test as much as possible under general condition. If the test is unavoidable, please perform the test strictly according to the following procedures, or it may damage the inverter.
It shall perform dielectric test strictly, or it may damage the inverter. If the dielectric test is unavoidable, please contact our company.
n Main Circuit Insulation Test
u Utilize 500VDC megameter to perform test under condition of main power shutdown;
u Disconnect all the control board circuits to prevent the control circuits from connecting with the test voltage. For the inverter with power level of V5-H-4T11G/15L and V5−H−4T15G/18.5L, it must disconnect the terminal J1 on the drive board and the PE. For the inverter with power level of V5-H-4T18.5G/22L or above, it must disconnect three pieces of cables entry to the surge absorption circuit. Pack the disconnected cable heads with insulating tapes properly;
u The main circuit terminal shall be connected with public conducting wires:
Fig.8−1 Main Circuit Insulation Test for V5−H−2T0.4G to V5−H−2T12.2G and V5−H−4T0.75G/1.5L to V5−H−4T15G/18.5L
Fig.8−2 Main Circuit Insulation Test for V5−H−4T18.5G/22L to V5−H−4T500G/560L
u Megameter voltage can only be imposed between the public conducting wire of the main circuit and the PE terminal;
u The normal indication value of the megameter is 200MΩ or above.
Technology originated from EMERSON and HUAWEI
Simon Fan Sales Manager
ShenZhen VTdrive Technology Co.,Ltd.
Mail:simon.fan@vtdrive.com
Tel:+86-0755-23060667
Fax:+86-0755-33671802
Site: http://www.vtdrive.com
Skype:simon.fan0611
Address:3F&4F, Xihe Industrial Zone,
TangTou Load, Shiyan Town,
Baoan District, Shenzhen, China.
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