FUNKEN FRV 125, Manual

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12
Malfunction Possible cause Remedy
Fan not rotating. a) No power output present
on the control unit.
b) Main switch set to “0”.
c) Motor cable not wired
in the terminal box.
d) Mains power not being supplied.
e) Defective control fuse.
f) Motor protection relay triggered.
•
Establish power output.
•
Set main switch correctly to “I”.
•
Connect motor cable.
Check:
Mains power, fuses, connections, motor
temperature. Leave to cool
if necessary (if the problem recurs,
shut down the cause of overheating).
Motor protection trig-
gered.
Motor temperature too high. Check motor for blocking, bearing
damage, winding damage; check
connections and power supply.
Impeller scraping. a) Deposits on impeller or
nozzle.
b) Relative positions of impeller
and nozzle have
changed.
Check impeller area for foreign
bodies, check motor attachment. Release
support, centre
impeller/nozzle and retighten
screws.
Fan rotates and
does not convey any
air or conveys too little
air.
a) Air flow interrupted.
b) Fan rotating in incorrect
direction.
c) Non-uniform inflow to
impeller.
Establish free air passage, clean impeller,
check pipe system, check cover flaps.
Change direction of rotation by
reversing polarity.
Lengthen the inlet-side straight connection
pipe to at least three times the nominal
value of the fan inlet. Mount non-return
valves or butterfly valves at the earliest
after three times the nominal value of the
fan outlet.
Fan vibrates while
running.
a) Deposits have formed on the
impeller vanes.
b) Condensate outlet blocked, impel-
ler rotating in water.
Clean the impeller.
Clean the water drain.
The following table is intended to provide the service team with pointers to possible causes of malfunctions and a guide to
rectifying them:
The warranty is rendered invalid if damage occurs due to a failure to conduct the regularly required
inspections.