Troubleshooting The Most Common Problems; Information To Contact Technical Support; Preventive Maintenance - WEG CFW11W G2 Series User Manual

6.3 TROUBLESHOOTING THE MOST COMMON PROBLEMS

Problem
Motor will not spin
Motor speed varies (fluctuates)
Motor speed too high or too low
Motor will not reach the rated speed or
the speed starts oscillating when close
to the rated speed (Vector Control)
Display off
Low motor speed and P0009 = P0169
or P0170 (motor in torque limitation),
for P0202 = 4 - vector with encoder

6.4 INFORMATION TO CONTACT TECHNICAL SUPPORT

NOTE!
For technical support or queries, it is important to have the following data at hand:
Inverter model.
„
Serial number, manufacturing date and hardware revision indicated on the nameplate of the product
„
(see Chapter 2 GENERAL INFORMATION on page
Installed software version (see P0023).
„
Application and programming data.
„

6.5 PREVENTIVE MAINTENANCE

DANGER!
Always turn off the main power supply before touching any electrical component associated to
„
the inverter.
High voltages may still be present even after disconnecting the power supply.
„
Wait at least 10 minutes for the complete discharge of the power capacitors.
„
Always connect the equipment frame to the protective earth (PE) at the proper terminal.
„
Table 6.2: Troubleshooting the most common problems
Point to be Checked
Wrong wiring
Analog reference (if used)
Wrong programming
Fault
Motor stall
Loose connections
Reference potentiometer is
defective
Variation in the external analog
reference
Parameters poorly set (vector
control)
Wrong programming (reference
limits)
Control signal of the analog
reference (if used)
Motor nameplate data
Programming
HMI connections
ICUP supply voltage of 24 Vdc 1. Check the connections of the control 24 Vdc power supply
Inverted encoder signals or
inverted power connections
Troubleshooting and Maintenance
Corrective Action
1. Check all the power and control connections. For example, the
DIx digital inputs programmed as run/stop, general enable or
without external fault must be connected to 24 Vdc or DGND*
(see Figure 3.40 on page 3-34
1. Check if the external signal is properly connected
2. Check the status of the control potentiometer (if used)
1. Check if the parameters have correct values for the application
1. Check if the inverter is not locked due to a fault condition
2. Check if there is a short circuit between terminals XC12:13 and
11 (short circuit in the 24 Vdc power supply)
1. Reduce motor overload
2. Increase P0136, P0137 (V/f) or P0169/P0170 (vector control)
1. Lock inverter, disconnect power supply and tighten all
connections
2. Check the tightening of all internal connections of the inverter
1. Replace potentiometer
1. Identify the reason for the variation. If the reason is electric noise,
use shielded cables or move the cable away from the power or
control wiring
1. Check parameters P0410, P0412, P0161, P0162, P0175 and
P0176
2. Refer to the Programming Manual
1. Check if the content of P0133 (minimum speed) and P0134
(maximum speed) are according to the motor and application
1. Check the level of the reference control signal
2. Check the programming (gains and offset) in P0232 to P0249
1. Check if the motor is according to the application requirements
1. Check P0410
1. Check the HMI connections outside the inverter
2. Check if the power supply limits are according to
page 3-31
1. Check the signals A-A, B-B, see the interface manual for
incremental encoder. If the signals are correct, change the
connection of the two output phases For example U and V
2-1).
and Figure 3.42 on page 3-36)
Table 3.21 on
CFW-11W G2 | 6-11
6