10 Maintenance/troubleshooting
HAZARD
Hazard of explosion of an ignition-capable gas/air atmosphere!
› In maintenance work and troubleshooting, the following order must be complied with!
1. There may not be any explosion-capable atmosphere.
2. Switch the fan off.
3. Open or tip the fan.
WARNING
Risk from electrical voltage!
› Troubleshooting and maintenance only by a trained electrician or trained and instructed qualied per-
sonnel!
› Obey industrial protection directives in troubleshooting.
› Pay attention to the 5 rules of electrical engineering:
– clear (all-pole separation of an electrical system from live parts),
– secure against switching on again
– establish freedom from voltage,
– earth and short-circuit,
– cover or fence off neighbouring live parts..
10.1 Maintenance intervals
" Carry out maintenance at least twice a year. We recommend more frequent maintenance in higher degrees of con-
tamination or wear.
10.2 Cleaning
NOTE
Regular cleaning of the EX fans prevents imbalance!
WARNING
Risk from electrical voltage!
› Cleaning the inside of the EX fan only by a trained electrician or trained and instructed qualied per-
sonnel!
› Only clean the inside of the EX fan dry.
› Pay attention to the 5 rules of electrical engineering:
– clear (all-pole separation of an electrical system from live parts),
– secure against switching on again
– establish freedom from voltage,
– earth and short-circuit,
– cover or fence off neighbouring live parts.
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