UNIFREM v.3.41x
10 May 2017
Page 29 from 180
A sample disley
Description
converter
W17-MT Overload
Motor is overloaded - converter integral Thermal integral MT [33] (page 24) exceeded
the 90% value and the fault " E29-Motor overload (page 33)" can occur shortly, after
which the converter is blocked for a longer time! For the duration of the warning, the
value of Thermal integral MT [33] (page 24) is displayed in FAULTS window.
F18-Flux braking
Flux braking function is active, the motor operates at a higher magnetic flux and part
of the braking energy is converter to motor heat. For the duration of the warning, the
value of Mag. Flux [71] (page 16) is displayed in FAULTS window. Flux braking can
be configured in [774] (page 74).
F19-Mechanical
brake
Frequency setpoint is held on the brake frequency Brake frequency [522] (page 102)
value, until the delay period and brake reaction Brake delay [519] (page 102) or the
brake advance time Brake advance [521] (page 102) expire. For the duration of the
warning, the value of Brake frequency [522] (page 102) is displayed in FAULTS
window.
F20-BM braking
Brake module was activated. Excessive energy is fed to brake resistor, which is
converted to heat. More information in the description of [376] (page 73). For the
duration of the warning, the value of Voltage DC [46] (page 16) is displayed in
FAULTS window.
W21-MT
deexcitation
Waiting for the motor field deexcitation after the voltage disconnection. Until the motor
is deexcited, start is not possible. Deexcitation period of the motor can be set by the
parameter Time constant MT [79] (page 45). For the duration of the warning, the
value of Mag. Flux [71] (page 16) is displayed in FAULTS window.
F22-Current limit
Current limit takes up. Current reached the value given by the parameter Max. mot.
current [5] (page 71) or Max. regen. current [549] (page 71) and the output frequency
along with the voltage is restricted. Motor is accelerating in the regenerative operation
and decelerating in the motoric operation. For the duration of the warning, the value of
Current MT [42] (page 16) is displayed in FAULTS window.
W23-Rs
and
Vs
identification
Stator resistance and stator voltage identification in effect. If the Rs identification in
parameter V/f Identification Rs [383] (page 62) is turned on, motor can stay longer on
zero frequency during the first start. For the duration of the warning, the value of
Stator resistance [345] (page 45) is displayed in FAULTS window.
F24-Flying start
Flying start in effect. Converter is searching the actual rotor frequency. Flying start can
be turned off by parameter Flying start [374] (page 72). For the duration of the
warning, the value of Freq. INV [47] (page 15) is displayed in FAULTS window.
W25-Max. voltage
Current controller saturation. Converter is not able to generate more voltage on the
output. Upper limit of generated voltage is defined by the parameter Max. voltage
[495] (page 71). For the duration of the warning, the value of Voltage MT [73] (page
16) is displayed in FAULTS window.
W26-Max.
flux
current
Saturation of flux creating current component. Probably a high value of Magnetic Flux
setpoint [452] (page 63) is set, or Mutual inductance [441] (page 45) is set too low.
Maximum current is set by Max. mot. current [5] (page 71). For the duration of the
warning, the value of flux current component is1 is displayed in FAULTS window.
W27-Max.
torque
current
Saturation of torque creating current component. Motor is either overloaded or motor
parameters are set incorectly. Maximum current is set by Max. mot. current [5] (page
71). For the duration of the warning, the value of torque current component is2 is
displayed in FAULTS window.
W28-Max. torque
Saturation of motor torque (see [477] (page 65)). For the duration of the warning, the
value of Torque [69] (page 16) is displayed in FAULTS window.
F29-Field weakening
Motor operates in the field weakening zone, to achieve higher frequencies. Motor
torque decreases in this mode in reciprocal proportion to the rotation speed. For the
duration of the warning, the value of Mag. Flux [71] (page 16) is displayed in FAULTS
window.
W30-Min. flux
The magnetic flux has reached its minimal value, the drive is not able to accelerate
anymore at this load level. For the duration of the warning, the value of Mag. Flux [71]
(page 16) is displayed in FAULTS window.
F31-Dyn.
Deceleration
DC link voltage crossed its reference DD setpoint [754] (page 73), the correction
changes the deceleration ramp dynamics. Only if Dynamic Deceleration is turned on (
Dynamic deceleration (DD) [749] (page 72)). For the duration of the warning, the
value of Voltage DC [46] (page 16) is displayed in FAULTS window.
