Mitsubishi Electric FR-CC2-P, Instruction Manual

Page: 144 / 184

Causes and corrective actions
PROTECTIVE FUNCTIONS
143
6
 Warning
The inverter output is not shut off when a protective function is activated.
Operation panel
indication
rE3
Name
Parameter verification error
Description
• The data in the converter unit are different from the data in the operation panel.
• A failure has occurred at the operation panel side EEPROM during parameter verification.
Check point
Check the parameter setting of the source converter unit against the setting of the destination converter unit.
Corrective action
• Continue the verification by pressing .
Perform parameter verification again. (Refer to page 134 .)
• The operation panel may be faulty. Contact your sales representative.
Operation panel
indication
rE4
Name
Model error
Description
• A different model was used when parameter copy from the operation panel or parameter verification was
performed.
• The data in the operation panel were not correct when parameter copy from the operation panel or
parameter verification was performed.
Check point
• Check that the parameter copy or verification source converter unit is of the same model.
• Check that parameter copy to the operation panel was not interrupted by switching OFF the power or by
disconnecting the operation panel.
Corrective action
• Perform parameter copy and parameter verification between converter units of the same model (FR-CC2-P
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 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, set "8 (positive logic)" or "108 (negative logic)" in any of
Pr.190 to Pr.195 (Output terminal function selection) to assign the function.
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 timer 1 to 3
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 by setting
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 95 .)
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
erases the indication.