Fault And Analysis - DEMA D5M Series Manual

NO.7 Maintenance and Fault Information
Variable frequency low
Inverter overheating
Inverter overloading
Motor overloading
Motor over torque
External interference
Emergency stop
4-20mA line breakage
Parameter setting
DC braking mode
Code table:
A b C,c

7.4 Fault and analysis

1. Motor fails to run after operating key is pressed
(1) Operating mode is set in error, that is, the operating mode is enabled together with
external control terminal on the condition of external control terminal.
(2) Frequency instruction is low level or not given.
(3) Peripheral wiring is in error, such as wrong two-wire system and three-wire system wiring
and relevant parameters setting.
(4) Setting of multi-function input terminal is in error (on the condition of external control).
78
voltage
150%
For 1min
150%
For 1min
error
d E F G
1: Inspect network voltage; 2: Send for repair.
1: Inspect whether the fan is locked and radiating fin
is free of foreign matter;
2: Whether ambient temperature is normal;
3: Whether there is air space enough for air
convection;
4: Inspect whether the thermistor and connecting
line are in open circuit.
1: Inspect whether the capacity of inverter is too
small; if yes, increase the capacity;
2: Inspect whether mechanical load is locked;
3: Poor V/F curve setting, so reset.
1: Whether mechanical load changes abruptly;
2: Too small motor adapted;
3: Heating insulation of the motor becomes poor;
4: Whether the voltage fluctuates greatly;
5: Whether open-phase exists;
6: Mechanical load increases.
1: Whether mechanical load fluctuates
2: Whether motor configuration is less than normal.
Isolate interference source
In emergency stop state
Connect up broken line
Correctly set the parameter
In DC braking mode
H O,o S n L T P r u 2