Troubleshooting and Maintenance
6
CFW-11 | 6-9
6.5 PREVENTIVE MAINTENANCE
DANGER!
Always turn off the mains power supply before touching any electrical component associated to
the inverter.
High voltage may still be present even after disconnecting the power supply.
To prevent electric shock, wait at least 10 minutes after turning off the input power for the complete
discharge of the power capacitors.
Always connect the equipment frame to the protective ground (PE). Use the adequate connection
terminal at the inverter.
DANGER!
Débranchez toujours l'alimentation principale avant d'entrer en contact avec un appareil électrique
associé au variateur.
Des tensions élevées peuvent encore être présentes, même après déconnexion de l’alimentation.
Pour éviter les risques d’électrocution, attendre au moins 10 minutes après avoir coupé
l’alimentation d’entrée pour que les condensateurs de puissance soient totalement déchargées.
Raccordez toujours la masse de l'appareil à une terre protectrice (PE). Utiliser la borne de connexion
adéquate du variateur.
ATTENTION!
The electronic boards have electrostatic discharge sensitive components.
Do not touch the components or connectors directly. If necessary, first touch the grounded metallic
frame or wear a ground strap.
Do not perform any withstand voltage test!
If necessary, consult WEG.
The inverters require low maintenance when properly installed and operated. The Table 6.3 on page 6-9
presents the main procedures and time intervals for preventive maintenance. The Table 6.4 on page 6-10
provides recommended periodic inspections to be performed every 6 months after the inverter start-up.
Table 6.3 - Preventive maintenance
Maintenance Interval Instructions
Fan replacement After 50000 operating hours
(1)
Replacement procedure shown in Figure 6.1 on page 6-11
Keypad battery replacement Every 10 years Refer to the Chapter 4 KEYPAD AND DISPLAY on page 4-1
Electrolytic
capacitors
(2)
If the inverter is stocked
(not being used):
"Reforming"
Every year from the manufacturing date
printed on the inverter identification label
(refer to the Section 2.4 IDENTIFICATION
LABELS FOR THE CFW-11 on page 2-17)
Apply power to the inverter (voltage between 300 and 330 Vac,
single-phase or three-phase, 50 or 60 Hz) for at least one
hour. Then, disconnect the power supply and wait at least
24 hours before using the inverter (reapply power)
Inverter is being used:
replace
Every 10 years Contact WEG technical support
(1) The inverters are set at the factory for automatic fan control (P0352 = 2), which means that they will be turned on only when the heatsink temperature
exceeds a reference value. Therefore, the operating hours of the fan will depend on the inverter usage conditions (motor current, output frequency, cooling
air temperature, etc.). The inverter stores the number of fan operating hours in the parameter P0045. When this parameter reaches 50000 operating hours,
the keypad display shows the alarm A177.
(2) Only valid for frame sizes B, C, D, E, F and G.
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