Fuji Electric FRENIC-AQUA series, User Manual

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2-8
Item Explanation Remarks
Fuse blown
Detects a break of the main circuit fuse in the inverter and stops the inverter. (For inverters
of 110 kW or above)
FUS
Charger circuit error Detects a charger circuit error and stops the inverter. (For inverters of 45 kW or above) PbF
Electronic thermal
overload protection
Stops the inverter with the electronic thermal overload protection setting to protect the
motor.
Protects general-purpose motors and inverter motors over all frequency range. (It is
possible to set the running level and thermal time constant (0.5 to 75.0 min).)
OL1
PTC thermistor
Detects the motor temperature to stop the inverter for protecting the motor.
Connect a PTC thermistor between terminals [C1] and [11] and configure the switch on the
control printed circuit board and function codes.
OH4
Motor protection
Overload early
warning
The inverter outputs a warning signal at the predetermined level before stop. -
Memory error
The inverter checks memory data when the power is turned ON or data is written. If any
memory error is detected, the inverter stops.
Er1
Keypad
communications error The error detection function stops the inverter output upon detection of a communications
error between the keypad and the inverter control circuit during operation using the keypad.
Er2
CPU error
If the inverter detects a CPU error or LSI error caused by noise or some other factors, this
function stops the inverter output.
Er3
Option
communications error Upon detection of an error in communication between the inverter and an option card, this
function stops the inverter output.
Er4
Option error When an option card detects an error, this function stops the inverter output. Er5
STOP key priority: Pressing the key on the keypad forcibly decelerates the motor to a
stop even when a run command is given via the terminal block or communications link.
After the stop, the inverter issues alarm Er6.
Operation protection
Start check: To prevent a sudden start, the inverter prohibits any run operations and
displays Er6 if any run command is present when;
- The inverter power is turned ON,
- An alarm is released, or
- A run command source is switched via the communications link.
Er6
Tuning error
During tuning of motor parameters, if tuning has failed or aborted, or an abnormal
condition has been detected in the tuning result, the inverter stops its output.
Er7
RS-485
communications error
(port 1)
When the inverter is connected to a communications network via the RS-485 port designed
for the keypad, detecting a communications error stops the inverter output.
Er8
Data save error during
undervoltage If the data could not be saved during activation of the undervoltage protection function, the
inverter displays the alarm code.
ErF
RS-485
communications error
(port 2) When the inverter is connected to a communications network via the RS-485 port on the
control terminals DX+ and DX-, detecting a communications error stops the inverter
output.
ErP
Power supply LSI error
Detects an LSI failure on the power supply printed circuit board, which is mainly caused by
noise, and stops the inverter output.
ErH
Mock alarm A mock alarm can be generated with keypad operations. Err
Current input wire
break detection If a break of the current input signal wire is detected, this function stops the inverter output
(Enable/Disable selectable).
CoF
PID feedback wire
break detection When PID feedback is assigned to the current input, if a wire break is detected, this
function stops the inverter output. (Switchable between Enable and Disable)
PV1
PV2
PVA
PVb
PVC
Enable circuit failure
Diagnoses the Enable circuit. If any circuit failure is detected, this function stops the
inverter output.
ECF
Customizable logic
abnormality
Issues an alarm if a customizable logic configuration error is detected. ECL
Dry pump protection Displays an error if a dry pump condition is detected under PID control. Pdr
Control of maximum
starts per hour Displays an error if the slow flowrate stop function is frequently activated under PID
control.
roC
End of curve protection Displays an error if large volume of water condition is detected under PID control. PoL
Anti-jam function Displays an error if starting has failed due to overcurrent. rLo
Filter clogging
prevention
Displays an error if overload is detected under PID control. FoL
Protection
Password protection Entering a wrong password five times causes an alarm. LoK