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Corrective Actions of Models with Digital Operator
: ON
Alarm Display
Digital
Operator
Flashing
Flashing
Flashing
208
: Flashing
Alarm Displays and Meaning
Inverter
RUN (Green)
ALARM (Red)
Detected as
an alarm
only. Fault
contact out-
put is not ac-
tivated.
: OFF
Description
Status
UV (Main circuit low volt-
age)
Main circuit DC voltage
dropped below the low-
voltage detection level
while the Inverter output
is OFF.
200 V:Main circuit DC
voltage drops be-
low approx. 200 V
(160 V for single-
phase)
400 V:Main circuit DC
voltage dropped
below approx.
400 V.
(Control supply fault)
Control power supply
fault is detected while
the Inverter output is
OFF.
OV (Main circuit
overvoltage)
Main circuit DC voltage
exceeded the
overvoltage detection
level while the Inverter
output is OFF. Detection
level
200 V Class:
approx 410 V or more
400 V Class:
approx 820 V or more
OH (Heatsink overheat)
Intake air temperature in-
creased while the Invert-
er output is OFF.
Causes and Correc-
tive Actions
Check the following:
•
Power supply volt-
age
•
Main circuit power
supply connection.
•
Terminal screws:
Loose?
Check the power supply
voltage.
Check the intake air tem-
perature.
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