6. Troubleshooting 6-5
Code
Meaning
Cause
Corrective action
• Too heavy load. Too
short accel/decel time
and cycle time
Check the size of the
load, length of the
accel/decel and cycle
times.
• Too high V/f pattern Check the V/f
Pattern.
OL2 Inverter
Over-load.
150% output
current of inverter
rating lasted more
than 1 minute, or
equivalent situation.
• Too low inverter
capacity
Replace the inverter
with larger capacity.
• Too heavy load. Too
short accel/decel time
and cycle time
Check the size of the
load, length of the
accel/decel and cycle
times.
• Too high V/f pattern Check the V/f
pattern.
OL1 Motor
Over-load.
Output of 150%
of the motor’s
rating lasted more
than 1 minute or
equivalent situation.
• Incorrect C2.03
(motor’s rated current)
Check C2.03
(motor’s rated current).
CB3
Analog Speed
command
failure.
Wire of the
external analog
speed control is
disconnected.
-
Replace the wire.
(Contact Samsung)
CB2Parameter
range over.
Input parameter
is out of max/min
value.
-
Input the value
within the
max/min value.
CB1 EEPROM
failure.
Error during
recalling of the
preset parameter
- Contact
Samsung
EF4 External
Fault. (Terminal 4)
Fault in external
Input (Terminal 4)
EF3 External
Fault. (Terminal 3)
Fault in external
Input (Terminal 3)
EF2 External
Fault. (Terminal 2)
Fault in external
Input (Terminal 2)
EF1External
Fault. (Terminal 1)
Fault in external
input (Terminal 1)
• An “external fault”
was input from a multi-
function input.
• Check if the multi-
function input is
properly selected.
•Remove the cause
of the external fault.
CB0
Parameter Fault.
Error in leading
the parameter
when power is
applied.
The check of the
parameters stored in
EEPROM is failed.
(The detected
parameters can be
confirmed in U3.02,
max. 32)
Contact Samsung.
6-6
MOSCON-E7 User’s Manual
Table 6.2 Fault display and contents (Warning on inverter) : Blinking display
Code
Meaning
Cause
Corrective action
UV
Main under-
Voltage.
The main circuit
DC voltage was
below:
200Vclass: 190V
400Vclass: 380V
• A open-phase occurred
with the input power supply.
• A momentary power loss.
• Too large voltage
fluctuation in the input
power supply.
Reset the fault after
correction.
OL3
Over torque
detection.
There was
output of180%
of the rated
current instantly.
• Too large load.
• Too low inverter’s capacity.
• Set P3.02 and
P3.03 appropriately.
• Check the
mechanical system
and correct the
cause of the
over torque.
SE
Warning.
Forward/reverse
run commands
input at the same
time.
• The forward and reverse
run command input at the
same time.
Check the
sequence of the
forward and
reverse run
commands.
BB
Base block.
Output block
command was
input from
external.
• The base block command
input.
STP
Local Stopped in
Remote Mode.
Motor stopped
by the stop key
in remote mode.
• In the remote mode, the
local stop command input.