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