IMO PRF, PRF EX 009 312436

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| Troubleshooting/maintenance/repair
14 Troubleshooting/maintenance/repair
Safety information
♦ Observe 3 Important safety information, page 2
♦ Pay attention to the safety data sheet of the chemical substances transported with the fan.
Danger
Loss of explosion protection
• The manufacturer must always be consulted before any maintenance or repair work is carried out!
Repairs should preferably always be carried out by the manufacturer! Exceptions can be made for non-
relevant components such as terminal boxes, screwed cable connections, etc. These can also be dealt
with on-site by the operator's qualified staff (authorised personnel). Non-compliance will result in the
ATEX certification being revoked!
• For ATEX-certified products, the repair or replacement of fan components is expressly only permitted
after consultation with the manufacturer and only if the manufacturer's original parts are used!
• After repair, the fan/system must be subjected to an inspection in accordance with local conditions,
regulations and laws (in Germany: §14 Abs 6 der BetrSichV Industrial Safety Regulation). This does not
apply to repairs carried out by the manufacturer.
14.1 Troubleshooting
Table 6 Troubleshooting
Problem Possible causes
Remedy
Fan does not run
smoothly
Impeller imbalance
Rebalancing by a specialist company if possible,
otherwise contact Systemair.
Soiling on the impeller Clean carefully, rebalance
Material decomposition on the
impeller due to aggressive
material conveyed.
Contact Systemair
Impeller rotates in wrong
direction.
Change direction of rotation (swap two phases in case of
a 3– phase motor).
Contact Systemair
Deformation of impeller due to
excessive temperature.
Ensure that the temperature does not exceed the certified
value/Install new impeller.
Vibrations, oscillations
Check the installation of the fan/check the duct system,
see 10 Installation, page 11.
Fan operation in resonant
frequency range
Consider chapter 11.2 Variable-speed fans, page 13
Air output of fan too
low
Impeller rotates in wrong
direction.
Change direction of rotation (swap two phases in case of
a 3– phase motor).
Wrong wiring configuration (e.g.
Y instead of Delta).
Check and possibly correct the wiring configuration.
Pressure losses too high. Optimize the line routing.
Flow regulators not or only
partly open.
Check opening position on site.
Intake or pressure ducts are
blocked.
Remove the blockage.
Grinding sounds
when starting or
operating the fan
Check if the duct connections of
the fan are strained.
Loosen the duct connections and realign it.
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