Preventive Maintenance - WEG CFW700 Serie Manual Del Usuario

Troubleshooting and Maintenance

6.4 PREVENTIVE MAINTENANCE

DANGER!
Always disconnect the general power supply before touching any electric
component associated to the inverter.
High voltages can be present even after the disconnection of the power supply.
Wait for at least 10 minutes for the complete discharge of the power capacitors.
Always connect the frame of the equipment to the protective earth (PE) at the
proper point.
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!
Maintenance
Fan replacement
If the inverter
is stocked (not
in use):
Electrolytic
"Reforming"
capacitors
Inverter being
used: replace
(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 alarm A0177.
56 | CFW700
If necessary, contact WEG.
Table 6.2: Preventive maintenance
Interval
After 50.000 hours of operation.
Every year from the
manufacturing date printed on
the inverter identification label
(refer to Chapter 2 GENERAL
INSTRUCTIONS on page
Every 10 years.
Instructions
Replacement procedure shown in
(1) Figure 6.1 on page 58
6.2 on page 58.
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
3). wait for at least 24 hours before using
the inverter (reapply power).
Contact WEG technical support to
obtain replacement procedure.
and Figure