6-10
6.3 If an Alarm Code Appears on the LED Monitor
Quick reference table of alarm codes
Alarm
code
Name Refer to
Alarm
code
Name Refer to
E
N
N
Electronic thermal overload alarm 1
Electronic thermal overload alarm 2
6-17
E NW
Overload 6-17
E
Instantaneous overcurrent 6-10
GT
Memory error 6-18
W GT
Keypad communications error 6-19
W GT
CPU error 6-19
W
Overvoltage 6-11
GT
Option card communications error 6-19
NW
Undervoltage 6-12
GT
Option card error 6-19
NKP
Input phase loss 6-13
GT
Operation protection 6-20
RN
Output phase loss 6-14
GT
Tuning error 6-20
J
Heat sink overheat 6-14
GT
GTR
RS-485 communications error
RS-485 communications error
(Option card)
6-21
J
Alarm issued by an external
device
6-15
GTH
Data saving error during
undervoltage
6-22
J
Motor protection
(PTC thermistor)
6-15
GTJ
Hardware error 6-23
FDJ
Braking resistor overheated 6-16
GTT
Mock alarm 6-23
EQH
PID feedback wire break 6-23
[ 1 ]
n Instantaneous overcurrent
Problem The inverter momentary output current exceeded the overcurrent level.
E
Overcurrent occurred during acceleration.
E
Overcurrent occurred during deceleration.
E
Overcurrent occurred when running at a constant speed.
Possible Causes What to Check and Suggested Measures
(1) The inverter output
terminals were
short-circuited.
Remove the wires connected to the inverter output terminals (U, V,
and W) and measure the interphase resistance of the wires. Check
if the resistance is too low.
Î Remove the part that short-circuited (including replacement o
the wires, relay terminals and motor).
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