54 | CFW700
Troubleshooting and Maintenance
English
ATTENTION!
The electronic cards have components sensitive to electrostatic discharges.
Do not touch directly on the components or connectors. If necessary, first touch
the grounded metallic frame or use proper grounding strap.
Do not execute any applied potential test on the inverter!
If necessary, contact WEG.
Table 6.2: Preventive maintenance
Maintenance Interval Instructions
Fan replacement After 50.000 hours of operation.
(1)
Replacement procedure shown in
Figure 6.1 on page 55 and Figure
6.2 on page 56.
Electrolytic
capacitors
If the inverter
is stocked
(not in use):
“Reforming”
Every year from the
manufacturing date printed on
the inverter identification label
(refer to chapter 2 GENERAL
INSTRUCTIONS on page 3).
Apply power to the inverter with
voltage between 220 and 230 Vac,
single-phase or three-phase, 50 or
60 Hz, for at least one hour. Then,
disconnect the power supply and
wait for at least 24 hours before
using the inverter (reapply power).
Inverter being
used: replace
Every 10 years.
Contact WEG technical support to
obtain replacement procedure.
(1) The inverters are set at the factory for automatic control of the fans (P0352 = 2), so that they are only started when
the temperature of the heatsink increases. Therefore number of operating hours of the fans will depend on the operating
conditions (motor current, output frequency, temperature of the refrigeration air, etc.). The inverted records in P0045 the
number of hours the fan remained ON. When the fan reaches 50,000 hours of operation, the HMI display will show the
ala r m A177.
Table 6.3: Periodic inspection at every 6 months
Component Abnormality Corrective Action
Terminals, connectors
Loose screws
Tighten
Loose connectors
Fans /Cooling systems
Dirty fans Cleaning
Abnormal acoustic noise
Replace fan. See Figure 6.1
on page 55 and Figure 6.2
on page 56. Check fan
connections.
Blocked fan
Abnormal vibration
Dust in the panel air filters Cleaning or replacement
Printed circuit boards
Accumulation of dust, oil, humidity, etc. Cleaning
Odor Replacement
Power module/ Power
connections
Accumulation of dust, oil, humidity, etc. Cleaning
Loose connection screws Tightening
Capacitors of the DC
link (Intermediate Circuit)
Discoloration/ odor / electrolyte leakage
ReplacementSafety valve expanded or broken
Frame expansion
Power resistors
Discoloration
Replacement
Odor
Heatsink
Accumulation of dust
Cleaning
Dirt
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