Alarm Display And Contents - ACP Speecon 7200M3 Manual

1.7.2 Alarm Display and Contents

Alarms, among inverter protective functions, do not operate fault contact output and returns to the former
operation status automatically when the factor is removed.
The following shows the types and contents.
Table 1.10 Alarm Display and Contents
Digital Operator fault
display
EF
(Simultaneous
Input of FWD and REV
commands)
EF blinks.
BB
External Baseblock) bb
blinks.
UV (Main Circuit
Under-voltage)
Uv blinks.
OL3
(Overtorque Detection)
(Note 1)
oL3 blinks
OV (Over Voltage)
ov blinks
OH (Cooling fin
Over Heat)
oH blinks
Note: 1. For OL3 (overtorque detection) fault display or alarm display can be selected according to the
constant (Pn-37) setting .For details, refer "OVERTORQUE DETECTION FUNCTION" on page 88.
Contents
Both FWD and REV commands are
"closed" for 500 ms or larger. Inverter
stops according to constants Pn-01.
External baseblock signal is accepted.
Inverter stops output. (Operation
restarts by releasing the external
baseblock signal.)
For the external baseblock signal, refer
to "MULTIFUNCTION CONTACT
INPUT FUNCTION SELECTION" on
page 84.
Main circuit DC voltage is reduced
less than detection level when inverter
is not outputting.
Motor current exceeding the set value
flows due to machine fault or overload.
Inverter continues operation.
Main circuit DC voltage is more than
overvoltage detection level. When
inverter is not outputting.
Intake air temperature rises when
inverter is not outputting.
- -
Check the sequence circuit.
Check the sequence circuit
Check the power supply voltage, main
circuit power supply wiring connection or
terminal screw tightening.
Check the machine using status and remove
the cause of the fault.
Or increase the set value [constant Pn-38] up
to the machine allowable value.
Check the power supply voltage
Check the intake air temperature.
34
Possible Cause/
Corrective Actions