15
Tests
The following sequence must be observed during commissioning:
AC motor
EC motor
1. Switch on the fan.
2. Carry out the tests required in the commissioning
protocol (19 Commissioning protocol, speed controlla-
ble fans: "Measurement data during commissioning" at
maximum speed.
3. Switch off the fan. With the mains voltage switched
on, the motor starts an initialisation (a few seconds).
After initialisation, the control input is active.
1. Switch off the fan via the control input.
2. Carry out the tests required in the commissio-
ning protocol (17 Commissioning protocol)
Speed-controllable fans: "Measurement data at
commissioning" at maximum speed.
11. Operation
Safety instructions
Warning: Danger from electrical voltage or moving parts.
•
The unit may only be operated by appropriately qualified persons, for details see table 1 Qualification, Operation. Table
1 Qualification,
•
Operate the fan only in accordance with its operating instructions and the operating instructions for the motor.
12. Troubleshooting/maintenance/repair
12.1. Safety instructions
•
Troubleshooting/maintenance/repair may only be carried out by appropriately qualified persons, for details see Table 1
Qualification.
•
The 5 safety rules must be observed, see 2.3 The 5 safety rules for working in and on electrical installations.
•
The impeller must be stationary.
12.2. Troubleshooting
Table 13 Troubleshooting
Malfunction Remedy
Possible causes
Remedy
Fan runs unsteadily
Impeller is out of balance
If possible, have it rebalanced by a
specialist company. Otherwise, please
contact Walpol.
Dirt on impeller
Clean carefully, rebalance
Material degradation on impeller due to
aggressive pumped media.
Contact Walpol
Direction of rotation of impeller incorrect
Change direction of rotation if
possible. Otherwise, please contact
Walpol.
Deformation of the impeller due to excessive
temperature.
Make sure that the temperature does
not exceed the certified value/mount a
new impeller.
Vibrations/vibrations
Check the installation of the fan/check
the duct system .
Fan operation in resonance frequency range
Consider chapter 9.2 Fans with
variable speed
Fan air performance too
low
Direction of rotation Impeller wrong
Change direction of rotation if
possible. Otherwise, please contact
Walpol.
