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6.2 Commissioning the Drive
6.2.1 Commissioning Steps
Here is a suggested commissioning process that shows the various stages of setting up a drive after you
have planned the job and installed the device.
1. Note down the motor nameplate data. It is important that the values entered are correct, or the drive
may not perform optimally. This is shown in section 5.2.3 Motor Nameplate Data
Voltage (Volts)
o
Current (Amps)
o
Power (kW)
o
Speed (RPM)
o
2. After connecting the drive and ensuring it is safe, switch on and wait for the Basic Operator Panel
(BOP) to initialize (under a minute).
3. If you chose to use the HI Overload feature (section 2 Planning), then you need to complete the
following:
In the Parameters area and set P10 = 1
o
set P205 = 0
o
go back to P10 = 0
o
There may be a short delay while the drive recalibrates the effected internal values.
o
4. Go to the Setup menu and complete the process detailed in section 5.2.4 Setup Menu
Set the Minimum motor speed to protect it from stalling and overheating. E.g. 450 rpm for a
o
4 pole motor = 15Hz.
Enter Ramp up time = 30 seconds as a starting point. For large inertia loads (e.g. large
o
diameter centrifugal fans) you may need to slow down the ramp up time to prevent over-
current faults due to the mass x acceleration rule. If you need a fast start, you may need to
install a larger unit – see the HI Overload option on page 7.
Skip Ramp-down time option (30 seconds is Ok as a starting point). Again, for large inertia
o
loads, or if there is another fan acting on the same airflow (e.g. AHUs with a return air fan
and a supply air fan), you may need to slow down the ramp down time to prevent
overvoltage faults due to regeneration.
Note: A warning (A7991) will occur just to let you know the Motor ID option is selected.
o
If a fault (Fxxxx) is triggered during this process, proceed to the Diagnostics Menu and
o
check on the correct course of action. This is shown in section 6 Troubleshooting. In most
cases you just have to acknowledge the fault, although in some instance you may need to
cycle the power to clear the fault (Turn mains isolator off for >10 seconds, then On).
5. To start the Motor ID test (that you selected in the Setup Menu), select Hand and then Start (Green
button). Drive should start a motor testing procedure that will last under a minute. You should hear
the 3 phases being pulsed in turn. When finished the warning symbol disappears from the screen.
6. At this stage I would recommend testing the drive in Hand mode for: -
Direction. If wrong either isolate and swap the motor output phase connection, or use
o
P1820=1 if you prefer not to change the wiring.
Are there any noise or vibration issues throughout the rev range? If so see the next section.
o
Can you achieve maximum speed without exceeding the rated FLA of the motor? If not you
o
should investigate why. You may need to slow down the ramp up time (P1120), set the
maximum speed (P1082) to a lower figure to prevent current warnings, or resize the v-belt
pulley, fan blade pitch, or pump impeller. If all these options are out, you can install a larger
motor and VSD to match the actual load.
Is the default maximum speed sufficient for the task? If not, and the motor current is below
o
the FLA nameplate rating at 50Hz, you can increase the maximum motor speed in P1082. I
would not recommend exceeding 60Hz unless you are sure the mechanical limitations of the
system are not exceeded.
Page 19 of 50
Building Technologies
Last Revised: 4/11/2011
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