Fuji Bikes 5000G11S/P11S instruction manual List of Protective Operations

6. Protective Operation

6-1 List of Protective Operations

In the event of an abnormality in the inverter, the protective function will activate immediately to trip the inverter, display the alarm name on the LED monitor, and the motor coasts-to-a stop. For alarm contents, see Section 6.1.1.

Table 6.6.1 List of alarm displays and protective functions

Alarm Name	Keypad panel display				Contents of operation
	LED	LCD
	OC1	OC DURING ACC	During		If the inverter output current momentarily exceeds the overcurrent
			acceleration		detection level due to an overcurrent in the motor, or a short-circuit
Over current	OC2	OC DURING DEC	During		or a ground fault in the output circuit, the protective function is
			deceleration		activated.
	OC3	OC AT SET SPD	Running at
			constant speed
	EF	GROUND FAULT	If a ground fault in the inverter output circuit is detected, the protective function is
Ground fault			activated (for 40HP or more only). If a ground fault occurs in an inverter rated at
			30HP or less, the inverter is protected by the overcurrent protection. If protection
			against personal injury or property damage is required, install a ground-fault
			protective relay or earth-leakage circuit breaker separately.
	OU1	OV DURING ACC	During		If the DC link circuit voltage of the main circuit exceeds the
			acceleration		overvoltage detection level (230V series: 400V DC,460V series:
Overvoltage	OU2	OV DURING DEC	During		800V DC) due to an increase in the regenerating current from the
			deceleration		motor, the output is shut down.
	OU3	OV AT SET SPD	Running at		However, protection against inadvertent overvoltage apply (e.g.,
			constant speed		high-voltage line) may not be provided.
Undervoltage	LU	UNDERVOLTAGE	If the DC link circuit voltage of the main circuit falls below the undervoltage detection
			level (230V series: 200V DC,460V series: 400V DC) due to a lowered power supply,
			the output is shut down. If function code F14 (Restart after momentary power failure)
			is selected, an alarm is not displayed. In addition, if the supply voltage falls to a
			level unable to maintain control power, an alarm may not be displayed.
Input open-phase	Lin	PHASE LOSS	If the inverter is driven with any one of the three phases connected to L1/R, L2/S and
			L3/T of the main circuit power supply "open", the rectifying diodes or smoothing
			capacitors may be damaged, at such time an alarm is issued and the inverter is
			tripped.
Overheating of heat	OH1	FIN OVERHEAT	If the temperature of the heat sink rises due to a cooling fan failure, etc., the
sink			protective function is activated.
External alarm	OH2	EXT ALARM	If the external alarm contacts of the braking unit, braking resistor or external thermal
			O/L relay are connected to the control circuit terminals (THR), this alarm will be
			actuated according to contact off signal.
			When the PCT thermal protection is activated(H26:1), it operates when the detected
			temperature is increased.
Inverter internal	OH3	HIGH AMB TEMP	If the temperature inside the inverter rises due to poor ventilation, etc., the protective
overheating			function is activated.
			Overcurrent of the terminal 13(20mA or more) due to the short circuit between the
			terminal 13 and 11, etc., the protective function is activated.
Overheating of	dbH	DBR OVERHEAT	If electronic thermal O/L relay (for braking resistor) function code F13 is selected, the
braking resistor			protective function is activated to prevent the resistor from burning due to overheating
			following frequent use of the braking resistor.
Motor 1 overload	OL1	MOTOR1 OL	The protective function is activated if the motor current exceeds the preset level,
			provided that electronic thermal O/L relay 1 function code F10 has been selected.
Motor 2 overload	OL2	MOTOR2 OL	If the second motor current exceeds the preset level when the operation is switched
			to drive the	second motor, the protective function is activated, provided that
			electronic thermal O/L relay 2 of function code A04 is selected.
Inverter overload	OLU	INVERTER OL	If the output current exceeds the rated overload current, the protective function is
			activated to provide thermal protection against semiconductor element overheating in
			the inverter main circuit.
Blown fuse	FUS	DC FUSE OPEN	If the fuse in the inverter is blown out following a short-circuit or damage to the
			internal circuit, the protective function is activated (for 40HP or more only).
Memory error	Er1	MEMORY ERROR	If a memory error occurs, such as missing or invalid data, the protective function is
			activated.
Keypad panel	Er2	KEYPD COM ERR	If a communication error or interrupt between the keypad panel and control circuit is
communication			detected, the protective function is activated.
error
CPU error	Er3	CPU ERROR	If an CPU error occurs due to noise, etc., the protective function is activated.
Option error	Er4	OPTN COM ERR	Error when using an optional unit
	Er5	OPTION ERROR
Forced stop	Er6	OPR PROCD ERR	Error when using the forced stop command
Output wiring error	Er7	TUNING ERROR	If there is an open circuit or a connection error in the inverter output wiring during
			performing auto-tuning, the protective function is activated.
RS-485	Er8	RS-485 COM ERR	If an error occurs when using RS-485, the protective function is activated.
communication error

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