Mitsubishi Electric FR-A800 Series Instruction Manual page 798

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
Operation panel
indication
Name
Description
Check point
Corrective action
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E.MB1 to 7
Brake sequence fault
The inverter output is shut off when a sequence error occurs during use of the brake sequence function (Pr.278
to Pr.285). This protective function is not available in the initial status. (The brake sequence function is invalid.)
(For details on fault records, refer to
Find the cause of the fault occurrence.
Check the set parameters and perform wiring properly.
E.EP
Vector Vector Vector
Encoder phase fault
The inverter output is shut off when the rotation command of the inverter differs from the actual motor rotation
direction detected from the encoder during offline auto tuning. This protective function is not available in the initial
status.
• Check for mis-wiring of the encoder cable.
• Check if the Pr.359 (Pr.852) Encoder rotation direction setting is incorrect.
• Perform connection and wiring securely.
• Change the Pr.359 (Pr.852) setting.
E.MP
Vector Vector Vector
Magnetic pole position unknown
When the offset value between the PM motor home magnetic pole position and the home position of the encoder
(position detector) is unknown, the protective circuit is activated to stop the inverter output.
• Check that the encoder position tuning was performed.
• Check that the encoder position tuning ended properly. When Pr.1105 (Pr.887) Encoder magnetic pole
position offset = "9999", the encoder position tuning does not end properly.
• Perform encoder position tuning with Pr.373 (Pr.871) Encoder position tuning setting/status. (Refer to
542.)
• Remove the cause of the tuning error, and perform tuning again. (Refer to
E.EF
External fault during output operation
When the X32 signal turns OFF (the contact opens) due to an external fault or other factor, the inverter output is
shut off. This function is available when "32" is set in any of Pr.178 to Pr.189 (Input terminal function
selection). This protective function is not available in the initial status (X32 signal is not assigned).
• Check that the X32 signal is OFF.
• Make sure that there is no problem in starting operation, and turn ON the X32 signal.
E.IAH
Abnormal internal temperature (IP55 compatible models only)
The inverter output is shut off when the inverter internal temperature reaches the specified value or higher.
• Check for too high surrounding air temperature.
• Check if the internal air circulation fan or the cooling fan stops due to a fault.
• Install an inverter suitable for the installation environment. (Refer to the Instruction Manual (Hardware).)
• Replace the internal air circulation fan or the cooling fan.
E.LCI
4 mA input fault
The inverter output is shut off when the analog input current is 2 mA or less for the time set in Pr.778 4 mA input
check filter. This function is available when Pr.573 4 mA input check selection = "2 or 3". (Refer to
This protective function is not available in the initial status.
• Check for a break in the wiring for the analog current input.
• Check that the Pr.778 setting is not too short.
• Check the wiring for the analog current input.
• Set the Pr.778 setting larger.
search engine
to
FR-LU08 indication E.MB1 Fault to E.MB7 Fault
page 572.)
FR-LU08 indication Encoder phase fault
FR-LU08 indication MagnetPole Pos Fault
FR-LU08 indication E.EF
FR-LU08 indication Abnormal Intnl Temp
FR-LU08 indication 4 mA input fault
page
page 542.)
page 517.)
6. PROTECTIVE FUNCTIONS
6.5 Causes and corrective actions
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