DAYLIFF SUNVERTER B Installation & Operating Manual page 37

6.2 Inspection and Maintenance Requirements
1. The inspection must be performed by professional technicians and the power
supply of the inverter should be cut off first if necessary.
2. Before maintenance, the power supply of the inverter must be cut off, and please
wait for not less than the time indicated on the inverter or the DC bus voltage is lower
than 36 V.
3． Please avoid leaving metal parts in the inverter, otherwise it may damage the
device.
4． If it is necessary to conduct insulation test on the inverter, all the input and output
terminals must be reliably shorted. It is prohibited to conduct insulation test on a
single terminal, and please use a 500 V megohm meter to conduct the test.
5． Before conducting insulation test on the motor, the connections between motor and
inverter must be removed.
6.3 Main Points of Inspection and Maintenance
Inspect Frequency Inspection
Routine Regular
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6.4 Inspection and Replacement of the Damageable Parts
The fans and electrolytic capacitors in the inverter are damageable parts. In order to
ensure a long-term, safe and trouble-free operation of the inverter, the damageable
parts should be replaced regularly.
Ÿ Fans
The service life of the fan is about 20,000 hours. If the fan makes abnormal noise or
vibration, please replace it immediately.
Ÿ Electrolytic capacitors
The service life of the electrolytic capacitor is related to the working conditions,
especially the ambient temperature. It should be replaced after 40,000 hours use
under normal conditions. If the electrolyte of the capacitor leaks, the safety valve
pops out or the capacitor body expands,
Inspection
on Item Content
1. Temperature
Operating
humidity
Environment
2. Dust, gas
1.Installation
Cooling
Environment
System
2. Radiator
1. Vibration,
Inverter
Temperature rise
Body
2. Noise
3. Wire, terminal
1. Vibration,
Motor Temperature rise
2. Noise
Input & Output
1. Input voltage
Parameter
2. Output current
1. Temperature<50 C
2. Humidity<90% No dew condensation.
3. No peculiar smell, flammable, explosive
gas
1. Installation environment with good
ventilation
2. Radiator air duct has not been blocked
1. Stable vibration, normal temperature of the
shell
2. No abnormal noise and peculiar smell
3. Fastening screws not loose
1. Steady running and normal temperature
2. No abnormal and non uniform noise
1. Input voltage in the specialized range
2. Output current under the rated value
6 34
Judgement Standard
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