Mitsubishi Electric FR-A740-00023 Instruction Manual page 410

Causes and corrective actions
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
400
E.FIN
Fin overheat
If the heatsink overheats, the temperature sensor is actuated to stop the inverter output.
The FIN signal can be output when the temperature becomes approximately 85% of the heatsink
overheat protection operation temperature.
For the terminal used for the FIN signal output, assign the function by setting "26" (positive logic) or
"126" (negative logic) in any of Pr. 190 to Pr. 196 (output terminal function selection). (Refer to page 230)
1. Check for too high ambient temperature.
2. Check for heatsink clogging.
3. Check that the cooling fan is stopped. (Check that
1. Set the ambient temperature to within the specifications.
2. Clean the heatsink.
3. Replace the cooling fan.
E.IPF
Instantaneous power failure
If a power failure occurs for longer than 15ms (this also applies to inverter input shut-off), the
instantaneous power failure protective function is activated to stop the inverter output in order to
prevent the control circuit from malfunctioning. If a power failure persists for longer than 100ms, the
alarm warning output is not provided, and the inverter restarts if the start signal is on upon power
restoration. (The inverter continues operating if an instantaneous power failure is within 15ms.) In some
operating status (load magnitude, acceleration/deceleration time setting, etc.), overcurrent or other
protection may be activated upon power restoration.
When instantaneous power failure protection is activated, the IPF signal is output. (Refer to page 254)
Find the cause of instantaneous power failure occurrence.
· Remedy the instantaneous power failure.
· Prepare a backup power supply for instantaneous power failure.
· Set the function of automatic restart after instantaneous power failure (Pr. 57). (Refer to page 254.)
E.BE
Brake transistor alarm detection
This function stops the inverter output if an alarm occurs in the brake circuit, e.g. damaged brake transistors.
In this case, the inverter must be powered off immediately.
· Reduce the load inertia.
· Check that the frequency of using the brake is proper.
Replace the inverter.
E.UVT
Undervoltage
If the power supply voltage of the inverter reduces, the control circuit will not perform normal functions.
In addition, the motor torque will be insufficient and/or heat generation will increase. To prevent this, if
the power supply voltage reduces below about 300VAC, this function stops the inverter output.
When a jumper is not connected across P/+-P1, the undervoltage protective function is activated.
When undervoltage protection is activated, the IPF signal is output. (Refer to page 254.)
1. Check for start of large-capacity motor.
2. Check that a jumper or DC reactor is connected across terminals P/+-P1.
1. Check the power supply system equipment such as the power supply.
2. Connect a jumper or DC reactor across terminals P/+-P1.
If the problem still persists after taking the above measure, please contact your sales representative.
E.ILF
Input phase failure
This alarm is output when function valid setting (= 1) is set in Pr. 872 Input phase failure protection selection and
one phase of the three phase power input opens. (Refer to page 264.)
Check for a break in the cable for the three-phase power supply input.
· Wire the cables properly.
· Repair a brake portion in the cable.
· Check the Pr. 872 Input phase failure protection selection setting.
FR-PU04
H/Sink O/Temp
FR-PU07
is displayed on the operation panel.)
FR-PU04
Inst. Pwr. Loss
FR-PU07
FR-PU04
Br. Cct. Fault
FR-PU07
FR-PU04
Under Voltage
FR-PU07
FR-PU04 Fault 14
FR-PU07 Input phase loss