12.4 Faults
12.4.1 Preconditions
•
The area has been marked by a number of visible signs „Repairs“.
•
You use a portable working lamp with a protected bulb so that you can see the interior parts of the housing better.
•
You follow the instructions in these operating instructions.
12.4.2 Coding of the personnel preconditions for faults
Code Description
1
Only authorised personnel of the manufacturer
2
Customer‘s personnel with technical training
3
Customer‘s personnel with technical training coached for the specifi c maintenance work
12.4.3 Faults and troubleshooting
The following table shows:
•
Fault:
a description of the problem - the most frequent fault symptoms;
•
Causes:
possible causes of damage;
•
Remedy:
suggestions for solving the problem;
•
PRF code:
who may work on the type PRF fan;
•
PRF-EX code: who may work on the type PRF-EX fan.
Fault
Causes
Remedy
PRF
code
PRF-EX
code
Fan does not run
smoothly
Adhesions to the rotor
Clean carefully, rebalance if nec-
essary
3
3, 1
Material decomposition on
the rotor due to aggressive
material conveyed
Contact the manufacturer
2
2
Deformation of rotor due to
excessive temperature
Contact manufacturer, install
new rotor, check bearings
3
3, 1
Output of fan too low
Wrong direction of rotation
of rotor
Change direction of rotation
2
2
Loss of pressure in lines too
high
Different line guidance
2
2
Throttle organs not or only
partly open
Check opening position on site
2
2
Intake or pressure paths
blocked
Remove obstacles
2
2
Grinding sounds in
operation or start of
the Ex fan
Intake line installed twisted.
Loosen intake line and realign.
2
2
55
Fan types PRF and PRF EX - 10.2013
