Instruction manual

79
Errors (Alarms)
ERRORS AND PROTECTIVE FUNCTIONS
6
Control Panel
Indication
E.LF FR-PU04V ELF
Name
Output phase failure
Description
This function stops the inverter output if one of the three phases (U, V, W) on the inverter's output
side (load side) opens.
Check point
• Check the wiring (Check the motor for a fault.)
• Check that the capacity of the motor used is not smaller than that of the inverter.
Corrective action
• Wire the cables properly.
• Check the Pr. 251 "output phase failure protection selection" setting.
Control Panel
Indication
E.CPU FR-PU04V CPU Fault
Name
CPU error
Description
Stops the inverter output if the communication error of the built-in CPU occurs.
Check point
—
Corrective action
Please contact your sales representative.
Control Panel
Indication
E. 6
FR-PU04V
Fault 6
E. 7 Fault 7
Name
CPU error
Description
If the arithmetic operation of the peripheral circuit of the built-in CPU does not end within the
predetermined period or if an error exists in the receive data of the built-in CPU, the inverter self-
determines it as an alarm and stops the output.
Check point
Check for devices producing excess electrical noises around the inverter.
Corrective action
• Connect devices securely.
• Take measures against noises if there are devices producing excess electrical noises around the
inverter.
• Please contact your sales representative.
Control Panel
Indication
E.P24 FR-PU04V E.P24
Name
24VDC power output short circuit
Description
When the 24VDC power output from the PC terminal is shorted, this function shuts off the power
output.
At this time, all external contact inputs switch off. The inverter cannot be reset by entering the RES
signal. To reset it, use the control panel or switch power off, then on again.
When the 24VDC power for encoder is shorted, this function shuts off the power output.
Check point
• Check for a short circuit in the PC terminal output.
• Check for wrong wiring.
• Check for a loose connector. Check that the cables are short-circuited.
Corrective action
• Remedy the short circuit portion.
• Connect the cables securely. Change the cables.
Control Panel
Indication
E.P12 FR-PU04V E.P12
Name
12VDC power output short circuit
Description
When the 12VDC power for encoder is shorted, this function shuts off the power output.
Check point
• Check for wrong wiring.
• Check for a loose connector. Check for a break in the cable.
Corrective action
Connect the cables securely. Change the cables.
Control Panel
Indication
E.CTE FR-PU04V —
Name
Control panel power supply short circuit
Description
When the control panel power supply (P5S of the PU connector) is shorted, this function shuts off
the power output. At this time, the control panel (parameter unit) cannot be used and RS-485
communication from the PU connector cannot be made. To reset, enter the RES signal or switch
power off, then on again.
When the 5VDC power for encoder is shorted, this function shuts off the power output.
Check point
• Check for a short circuit in the PU connector cable. Check for a loose connector.
• Check that cables are not short-circuited.
• Check for wrong wiring.
Corrective action
• Check the PU and cable.
• Connect the cable securely. Change the cable.