Veichi JT550 Series Manual page 127

JT550 Series Inverter Manual
8.4 Common Errors and Solutions
SN Error Types
No Display With
1
Power On
Garbled Codes On
2
the Display
Err23" Alert on
3
the Display
Frequent "Err14"
4
Module
Overheated Alert
Motor Does Not
Work After
5
Starting The
Motor Drive
X Terminal
6
Failure
The motor speed
cannot be
7
increased in
CLVC mode
Frequent Error
Reports of
8
Overcurrent and
Overvoltage By
Motor Drive
Possible Causes
No power grid voltage or voltage is
too low;
Broken power switch on the drive
board;
Broken bridge rectifiers;
Broken snubber resistors of motor
drive;
Broken control board and keypad;
Control board is disconnected to
drive board and keypad.
Bad connection between drive
board and control board;
Damaged parts on control board;
Short motor or motor cables ground
fault;
Hall errors;
Power grid voltage too low;
Short motor or motor cables ground
fault;
Broken motor drive;
The setting of carrier frequency is
too high;
Broken fans or clogged vents;
Internal damaged parts of motor
drive (Thermocouple, etc.);
Motor and motor cables;
Incorrect motor drive parameters
setting (Motor parameters);
Bad connection between drive
board and control board;
Drive board malfunctions.
Parameter setting errors;
External signal errors;
PLC and loose +24V jump wire;
Control board errors.
The encoder is faulty.
The encoder cable is connected
incorrectly or in poor contact.
The PG card is faulty.
The drive board is faulty.
Incorrect motor parameters setting;
Inappropriate Acceleration
/Deceleration Time;
Load Fluctuation.
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Chapter 7 Maintenance and Troubleshooting
Solutions
Inspect input power;
Check bus voltage;
Unplug and plug the wires on
pin 8 and pin 28;
Contact tech support.
Unplug and plug the wires on
pin 8 and pin 28;
Contact tech support.
Measure the insulation of the
motor and the output cable
using a megohmmeter;
Contact tech support.
Lower the carrier frequency
( F0.15);
Replace fans, and clean the
vents;
Contact tech support.
Check the connection between
motor drive and motor;
Change the motor or eliminate
mechanic errors;
Check and reset the motor
parameters.
Check and reset group F2
parameters;
Reconnect external signal
wires;
Reconfirm PLC and +24V
jump wire;
Contact tech support.
Replace the encoder and
ensure the cabling is proper.
Replace the PG card.
Contact the agent or Juditech
for technical support.
Reset motor parameters or tune
the motor;
Set a proper acceleration
/deceleration time;
Contact tech support