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TXP Inst. & Maint. Manual: IM-825
10 FAULT TABLE
10.1 Fault Table
Disturbance
Possible cause
Solution
Fan does not start Electrical connection is missing
or incorrect
Check the connection
PTC thermistor frequency con-
verter is not connected
Connect PTC thermistor
For fans with customer-owned
frequency inverter: frequency in-
verter is not properly parameter-
ized
Properly parameterize
the frequency inverter
according to the motor
shield and information
in operating instructions
Engine defective
Changing the engine
The current con-
sumption speci-
fied on the motor
shield is ex-
ceeded
Fan runs outside the character-
istic line (system resistance too
low)
Adjust the working point
with throttle valve or by
reducing the frequency
Impeller rotation direction wrong Control the direction of
rotation
One or two phases not con-
nected correctly
Connect missing
phases
Motor not properly connected in
star or triangle
Connect motor properly
Engine defective
Replacing the motor
For customer-owned frequency
inverter: start-up time not set
correctly
Setting the start-up time
correctly
For customer-specific frequency
inverters: adjusts to high corner
frequency (max. frequency) in
the frequency inverter.
Applied voltage too low
Ensure the required
power supply