WEG CFW-11W G2 RB Series, User Manual

Page: 95 / 107

Troubleshooting and Maintenance
6-12 | CFW-11W G2
6
ATTENTION!
Electronic boards have components sensitive to electrostatic discharges.
Do not touch the components or connectors directly. If necessary, first touch the grounded metallic
frame or wear a ground strap.
Do not execute any applied potential test on the inverter!
If necessary, contact WEG.
When installed in proper environment and operating conditions, the inverters require little maintenance. Table 6.3
on page 6-12 presents the main procedures and time intervals for preventive maintenance. Table 6.4 on page
6-12 contains the recommended inspections to be performed every 6 months after the start-up.
Table 6.3: Preventive maintenance
Maintenance Interval Instructions
HMI battery replacement Every 10 years See Chapter 4 HMI on page 4-1
Cleaning the cooling system and changing
the coolant
Every 5 years Contact WEG
Monthly inspection Once a month Open the panel and check for leaks. If
present, it must be corrected
Refill 1.5 % of Inhibitor CorteC VpCI-649 Once a year Contact WEG
The following refrigeration system parameters must be registered annually:
„
Measure the ethylene glycol concentration using a refractometer. If the concentration is below the recommended
level, ethylene glycol must be replaced in the system.
„
Measure the pH of the solution. The pH of the solution should be between 8.2 ... 10. If the pH is outside this
range, a complete fluid change must be made.
Table 6.4: Periodic inspections every six months
Component Anomalies Corrective Action
Terminals, connectors Loose Screws Tighten
Loose Connectors
Printed circuit boards Buildup of dust, oil, moisture, etc. Cleaning
Smell Replace
Power module/Power connections Buildup of dust, oil, moisture, etc. Cleaning
Loose connection screws Tighten
Power resistors Discoloration Replace
Smell
6.5.1 Cleaning Instructions
When it is necessary to clean the inverter, follow the instructions below:
Electronic boards:
1. Disconnect the power supply of the inverter and wait for 10 minutes.
2. Remove the dust accumulated on the boards using an anti-static brush or ion compressed air gun (Example:
Charges Burtes Ion Gun (non-nuclear) reference A6030-6DESCO).
3. If necessary, remove the boards from the inverter.
4. Always wear a grounding strap.