151
Causes and corrective actions
Operation Panel
Indication
E.PUE
FR-PU04
FR-PU07
PU Leave Out
Name
PU disconnection
Description
· This function stops the inverter output if communication between the inverter and PU is suspended,
e.g. the operation panel and parameter unit is disconnected, when "2", "3", "16" or "17" was set in
Pr.
75 Reset selection/disconnected PU detection/PU stop selection
.
· This function stops the inverter output when communication errors occurred consecutively for more
than permissible number of retries when a value other than "9999" is set in
Pr. 121
Number of PU
communication retries
during the RS-485 communication with the PU connector.
· This function stops the inverter output if communication is broken within the period of time set in
Pr.
122 PU communication check time interval
during the RS-485 communication with the PU connector.
Check point
· Check that the FR-DU07 or parameter unit (FR-PU04/FR-PU07) is fitted tightly.
· Check the
Pr. 75
setting.
Corrective action
Fit the FR-DU07 or parameter unit (FR-PU04/FR-PU07) securely.
Operation Panel
Indication
E.RET
FR-PU04
FR-PU07
Retry No Over
Name
Retry count excess
Description
If operation cannot be resumed properly within the number of retries set, this function trips the inverter.
Functions only when
Pr. 67
Number of retries at fault occurrence
is set. When the initial value (
Pr. 67
= "0")
is set, this protective function does not function.
Check point
Find the cause of alarm occurrence.
Corrective action
Eliminate the cause of the error preceding this error indication.
Operation Panel
Indication
E. 6
FR-PU04
FR-PU07
Fault 6
E. 7
Fault 7
E.CPU
CPU Fault
Name
CPU error
Description
Stops the inverter output if the communication error of the built-in CPU occurs.
Check point
Check for devices producing excess electrical noises around the inverter.
Corrective action
· Take measures against noises if there are devices producing excess electrical noises around the
inverter.
· Please contact your sales representative.
Operation Panel
Indication
E.CTE
FR-PU04
⎯⎯
FR-PU07
E.CTE
Name
Operation panel power supply short circuit, RS-485 terminal power supply short circuit
Description
When the operation panel power supply (PU connector) is shorted, this function shuts off power output
and stops the inverter output. At this time, the operation panel (parameter unit) cannot be used and
RS-485 communication from the PU connector cannot be made. When the internal power supply for
the RS-485 terminals are shorted, this function shuts off the power output.
At this time, communication from the RS-485 terminals cannot be made.
To reset, enter the RES signal or switch power off, then on again.
Check point
1. Check for a short circuit in the PU connector cable.
2. Check that the RS-485 terminals are connected correctly.
Corrective action
1. Check the PU and cable.
2. Check the connection of the RS-485 terminals
Operation Panel
Indication
E.MB1 to 7
FR-PU04
⎯⎯
FR-PU07
E.MB1 Fault to E.MB7 Fault
Name
Brake sequence error
Description
The inverter output is stopped when a sequence error occurs during use of the brake sequence
function (
Pr. 278
to
Pr. 285
).
This protective function does not function in the initial status (brake
sequence function is invalid).
Check point
Find the cause of alarm occurrence.
Corrective action
Check the set parameters and perform wiring properly.
to
Содержание FR-A741-11K
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