WEG CFW700 User Manual - page 58
CFW700 | 53
Troubleshooting and Maintenance
E
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Problem
Point to be
Verified
Corrective Action
Off display
Keypad
connections
1. Check the inverter keypad connection.
Power supply
voltage
1. Rated values shall be within the limits specified below:
200...240 V power supply: (Frame sizes A to D) Minimum:
170 V; Maximum: 264 V.
220 / 230 V power supply: (Frame size E) Minimum: 187 V;
Maximum: 253 V.
380...480 V power supply: Minimum: 323 V; Maximum:
528 V.
500...600 V power supply: Minimum: 425 V; Maximum:
660 V.
Mains supply fuses
open
1. Replace fuses.
Motor does not
operate in the field
weakning region
(Vector Control)
Settings
1. Decrease P0180.
Low motor speed
and P0009 = P0169
or P0170 (motor
operating with
torque limitation), for
P0202 = 5 - vector
with encoder
Encoder signals
are inverted or
power connection
is inverted
1. Check the signals A – A, B – B, refer to
. If signals are properly installed, exchange two of the
output phases. For instance U and V.
Encoder cable is
broken
1. Replace the cable.
6.3 INFORMATION FOR CONTACTING TECHNICAL SUPPORT
For technical support and servicing, it is important to have the following information in hand:
Inverter model.
Serial number and manufacturing date available on the identification label of the product (refer
to
section 2.5 IDENTIFICATION LABELS on page 8
and the
Installed software version (check parameter P0023).
Application data and inverter settings.
6.4 PREVENTIVE MAINTENANCE
DANGER!
Always disconnect the general power supply before touching any electric
component associated to the inverter.
High voltages can be present even after the disconnection of the power supply.
Wait for at least 10 minutes for the complete discharge of the power capacitors.
Always connect the frame of the equipment to the protective earth (PE) at the
proper point.