Mitsubishi FR-A740-00023-EC, Instruction Manual

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400
Causes and corrective actions
Operation Panel
Indication
E.FIN
FR-PU04
FR-PU07
H/Sink O/Temp
Name
Fin overheat
Description
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)
Check point
1. Check for too high ambient temperature.
2. Check for heatsink clogging.
3. Check that the cooling fan is stopped. (Check that
is displayed on the operation panel.)
Corrective action
1. Set the ambient temperature to within the specifications.
2. Clean the heatsink.
3. Replace the cooling fan.
Operation Panel
Indication
E.IPF
FR-PU04
FR-PU07
Inst. Pwr. Loss
Name
Instantaneous power failure
Description
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)
Check point
Find the cause of instantaneous power failure occurrence.
Corrective action
· 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.)
Operation Panel
Indication
E.BE
FR-PU04
FR-PU07
Br. Cct. Fault
Name
Brake transistor alarm detection
Description
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.
Check point
· Reduce the load inertia.
· Check that the frequency of using the brake is proper.
Corrective action
Replace the inverter.
Operation Panel
Indication
E.UVT
FR-PU04
FR-PU07
Under Voltage
Name
Undervoltage
Description
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.)
Check point
1. Check for start of large-capacity motor.
2. Check that a jumper or DC reactor is connected across terminals P/+-P1.
Corrective action
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.
Operation Panel
Indication
E.ILF
FR-PU04 Fault 14
FR-PU07 Input phase loss
Name
Input phase failure
Description
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 point Check for a break in the cable for the three-phase power supply input.
Corrective action
· Wire the cables properly.
· Repair a brake portion in the cable.
· Check the
Pr. 872 Input phase failure protection selection setting.