Danfoss VFD500 Series Manual page 116

Chapter 6 Fault diagnosis and solutions
Fault Name
Low voltage
Contactor open
Frequency
inverter
overload
VFD500 high performance vector control frequency inverter user manual
Faul
Disp
t
lay
cod
e
1: Instantaneous power failure
occurs
on the input power supply or
input phase loss
2: The frequency inverter's input
voltage is not within the
Er.L
allowable
8 v1
range.
3: Cut off the power during
operation
4:the internal wiring of the
inverter is loose, or the hardware
is bad.
1: Instantaneous power failure
occurs
on the input power supply
2: The frequency inverter's input
voltage is not within the
Er.L
allowable
9 v2
range.
3: Cut off the power during
operation
4:the internal wiring of the
inverter is loose, or the hardware
is bad.
1:The load is too large or the
motor is blocked.
2 : T h e l a r g e i n e r t i a l o a d
acceleration and deceleration
time is too short
Er.
3: When the VF is controlled, the
10
Ol
torque boost or V/F curve is not
suitable.
4:The frequency converter
selection is too small
5 : O v e r l o a d a t l o w s p e e d
operation
Possible Causes
113
Solutions
1:Check if the input
power supply is
abnormal, whether the
input power terminal is
loose, whether the input
contactor or the air switch
is abnormal.
2:adjust the voltage to the
normal range
3:Power off after the
inverter stops
4:seeking technical
support
5: For the unstable power
supply, if the performance
requirements are low, try
to enable the
1:Check if the input
power supply is
abnormal, whether the
input power terminal is
loose, whether the input
contactor or the air switch
is abnormal.
2:adjust the voltage to the
normal range
3:Power off after the
inverter stops
4:seeking technical
support
5: For the unstable power
supply, if the performance
requirements are low, try
t o e n a b l e t h e
1. Reduce the load and
check the motor and
mechanical conditions.
2, increase the
acceleration and
deceleration time
3. Adjust the torque boost
or V/F curve
4, select the inverter with
a larger power level
5. Perform motor self-
learning in cold state and
reduce carrier frequency