Specifications

19
MITSUBISHI ELECTRIC
FR-E 500 EC
Display on
control panel
FR-PA02-02
Meaning Description Remedy
E.OC1
Overcurrent 1
(acceleration)
A) The output current of the inverter has reached or exceeded 200 % of the rated current
during acceleration, deceleration, or at constant speed.
B) The temperature of the main circuits of the inverter rises rapidly.
The cause for the activation of the protective func
-
tion is a short circuit or a ground fault across the
main outputs, an exceeding moment of inertia of
the load (GD
2
), too short acceleration / decelera
-
tion time presets, restart during a motor idling
phase, operation of a motor with an exceeding
capacity.
Overheating due to insufficient cooling (defective
cooling fan or choked heat sink).
E.OC2
Overcurrent 2
(constant speed)
E.OC3
Overcurrent 3
(deceleration)
E.OV1
Overvoltage 1
(acceleration)
The converter voltage has increased highly due to regenerative energy. The overvoltage
limit was exceeded during acceleration, deceleration, or at constant speed.
In most cases the protective function is activated
due to a too short deceleration time preset or a
regenerative overload.
Increase the deceleration time by connecting
an external brake unit.
An overvoltage in the mains power supply acti-
vates this protective function as well.
E.OV2
Overvoltage 2
(constant speed)
E.OV3
Overvoltage 3
(deceleration)
E.THN
Overload
(motor)
The electronic overload protection for the motor or inverter was activated.
The electronic motor protection switch continually detects the motor current and the output
frequency of the inverter. If a self-cooling motor operates over a long period at low speed but
high torque, the motor is thermally overloaded and the protective function is activated.
If several motors are operated by one inverter the motor protection switch will not operate properly.
In this case deactivate the motor protection and replace it by external protection switches.
Decrease the motor load to avoid an activation.
Check whether the performance range of the
motor and inverter correspond.
E.THT
Overload
(inverter)
E.F1n
Fin overheat If the cooling fin overheats, the fin overheat sensor activates and halts inverter output. Check environmental temperature.
Fn
Fan breakdown
The cooling fan breaks down or an operation different from the setting of parameter 244
(cooling fan operation selection) is performed. Inverter output does not stop.
Check parameter 244 and replace the cooling fan
if necessary.
E.bE
Brake transistor failure
A) The integrated brake transistor does not operate properly.
B) Possibly, a thermal overload occured.
Check the relative operating time of the brake
resistor. In case of thermal difficulties use an
external brake resistor or an inverter of higher
capacity.
E.0F
Ground failure An overcurrent occured due to a ground failure upon the inverter output (load side). Check load connections (motor circuit).
E.0TH
Activation of an external
motor protection relay
(thermal contact)
An external motor protective switch was activated.
If an external motor protective switch for thermal monitoring is used, this switch can
activate the protective function of the inverter.
Check motor load and drive.
E.0LT
Stall prevention
overload
A long lasting excess of the current limit (OL display) shuts down the inverter.
Reduce the load.
Check the preset values for the current limit
(parameter 22) and the stall prevention selection
(parameter 156).
E.OPT
Error in an optional unit
A dedicated inboard option does not operate properly.
The protective function is activated, if an internal option is improperly installed or connected.
Check connections and connectors of the
optional unit.
E.PE
Memory error Error on access of the data memory of the inverter.
Please contact your nearest MITSUBISHI
ELECTRIC representative if the error occurs
again.
E.PUE
Control panel connection
error
A connection error between inverter and control panel occurred during operation.
This alarm is only returned, if parameter 75 is set to “2", ”3", “16", or ”17".
Check the connection of control panel.
E.rET
Automatic restart retry
exceeded
After activation of a protective function the inverter failed to be restarted automatically
within the number of retries specified in parameter 67.
Remedy the actual cause of the originary
protective function.
Overview of protective functions
The inverter FR-E 500 EC provides a large
number of protective functions that pro
-
tect the drive and the inverter against
damage in case of any malfunction.
If an error occurs, the output of the in
-
verter is suspended and the control panel
returns an error message.
Refer to the following table for detailed
information concerning these error
messages.
FR-PA02
-02
MON
EXT
PROTECTIVE FUNCTIONS