Mitsubishi Electric FR-CC2-N Series, Инструкция по эксплуатации

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6. PROTECTIVE FUNCTIONS
6.5 Causes and corrective actions
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 Warning
Output is not shut off when a protective function is activated.
 Alarm
Output is not shut off when a protective function is activated. The Alarm (LF) signal can be output depending on the parameter
setting. (Set "98" in
Pr.190 to Pr.195 (Output terminal function selection) . Refer to page 90 .)
 Fault
When a protective function is activated, the inverter output is shut off and a fault signal is output.
Operation panel
indication
rE4
Name Product series error
Description
• The series of source converter unit for Parameter copy or the parameter verification is different from that of target
converter unit.
• The data in the operation panel are not correct for the parameter write from the operation panel to the converter
unit for Parameter copy or the parameter verification.
Check point
• Check that the source converter unit for Parameter copy or the parameter verification is in the same series as
the target converter unit.
• Check that Parameter copy was not interrupted by switching OFF the converter unit power or by disconnecting
the operation panel.
Corrective action
• Perform Parameter copy or the parameter verification between converter units of the same series.
• Perform parameter copy to the operation panel from the converter unit again.
Operation panel
indication
Err.
Description
• The RES signal is turned ON.
• The operation panel and the converter unit cannot make normal communication (contact faults of the connector).
• This error may occur when the voltage at the input side of the converter unit drops.
• When using a separate power source for the control circuit power (R1/L11, S1/L21) from the main circuit power
(R/L1, S/L2, T/L3), this error may appear at turning ON of the main circuit. It is not a fault.
Corrective action
• Turn OFF the RES signal.
• Check the connection between the operation panel and the converter unit.
• Check the voltage on the input side of the converter unit.
Operation panel
indication
TH
Name Electronic thermal relay function pre-alarm
Description
If the accumulated electronic thermal value reaches 85%, TH is displayed and the THP signal is output. If the
cumulative value reaches or exceeds the specified value, the protection circuit is activated to stop the outputs of
the converter unit.
For the terminal used for the THP signal output, assign the function by setting "8" (positive logic) or "108"
(negative logic) in any parameter from
Pr.190 to Pr.195 (Output terminal function selection) .
Check point Check for large load or sudden acceleration.
Corrective action Reduce the load and frequency of operation.
Operation panel
indication
MT1 to MT3
to
Name Maintenance signal output
Description
Appears when the converter unit's cumulative energization time reaches or exceeds the parameter set value. Set
the time until the MT is displayed using
Pr.504 Maintenance timer 1 warning output set time (MT1), Pr.687
Maintenance timer 2 warning output set time (MT2), and Pr.689 Maintenance timer 3 warning output set
time (MT3). MT does not appear when the settings of Pr.504 , Pr.687 , and Pr.689 are initial values (9999).
Check point The set time of maintenance timer has been exceeded. (Refer to page 82 .)
Corrective action
Take appropriate countermeasures according to the purpose of the maintenance timer setting.
Setting "0" in
Pr.503 Maintenance timer 1 , Pr.686 Maintenance timer 2 , and Pr.688 Maintenance timer 3
clears the indication.
Operation panel
indication
FN
Name Fan alarm
Description Appears when the cooling fan in the converter unit stops due to a fault or slows down.
Check point Check the cooling fan for a failure.
Corrective action The fan may be faulty. Contact your sales representative.