Mitsubishi Electronics MR-J2S- A Alarm AL.17 or AL.19 occurs if, Position erase Data in error

10. TROUBLESHOOTING

Display	Name	Definition				Cause	Action
AL.17	Board error 2	CPU/parts fault	Faulty parts in the servo amplifier				Change the servo amplifier.
AL.19	Memory error 3	ROM memory fault			Checking method
				Alarm (AL.17 or AL.19) occurs if
				power is switched on after CN1A,
				CN1B and CN3 connectors are
				disconnected.
AL.1A	Motor	Wrong combination	Wrong combination of servo				Use correct combination.
	combination	of servo anplifier	amplifier and servo motor connected.
	error	and servo motor.
AL.20	Encoder error 2	Communication	1.	Encoder connector (CN2)			Connect correctly.
		error occurred		disconnected.
		between encoder	2.	Encoder cable faulty			Repair or change the cable.
		and servo amplifier.		(Wire breakage or shorted)
AL.24	Motor outout	Ground fault	1.	Power input wires and servo motor			Connect correctly.
	ground fault	occurred at the		output wires are in contact at
		servo motor outputs		main circuit terminal block (TE1).
		(U,V and W phases)	2.	Sheathes of servo motor power			Change the cable.
		of the servo		cables deteriorated, resulting in
		amplififer.		ground fault.
			3.	Main circuit of servo amplifier			Change the servo amplifier.
				failed.
					Checking method
				AL.24 occurs if the servo is
				switched on after disconnecting
				the U, V, W power cables from
				the servo amplifier.
AL.25	Absolute	Absolute position	1.	Reduced voltage of super capacitor			After leaving the alarm occurring for a few
	position erase	data in error		in encoder			minutes, switch power off, then on again.
							Always make home position setting again.
			2.	Battery voltage low			Change battery.
			3.	Battery cable or battery is faulty.			Always make home position setting again.
		Power was switched	4.	Super capacitor of the absolute			After leaving the alarm occurring for a few
		on for the first time		position encoder is not charged			minutes, switch power off, then on again.
		in the absolute					Always make home position setting again.
		position detection
		system.
AL.30	Regenerative	Permissible	1.	Wrong setting of parameter No. 0			Set correctly.
	alarm	regenerative power	2.	Built-in regenerative brake			Connect correctly
		of the built-in		resistor or regenerative brake
		regenerative brake		option is not connected.
		resistor or	3.	High-duty operation or continuous			1. Reduce the frequency of positioning.
		regenerative brake		regenerative operation caused the			2. Use the regenerative brake option of
		option is exceeded.		permissible regenerative power of			larger capacity.
				the regenerative brake option to			3. Reduce the load.
				be exceeded.
					Checking method
				Call the status display and check
				the regenerative load ratio.
			4.	Power supply voltage is abnormal.			Review power supply
				MR-J2S-		A:260V or more
				MR-J2S-		A1:135V or more
		Regenerative	5.	Regenerative transistor faulty.			Change the servo amplifier.
		transistor fault			Checking method
				1) The regenerative brake option
				has overheated abnormally.
				2) The alarm occurs even after
				removal of the built-in
				regenerative brake resistor or
				regenerative brake option.
			6.	Built-in regenerative brake			Change servo amplifier or regenerative
				resistor or regenerative brake			brake option.
				option faulty.
		Cooling fan stop	7. Unusual overheat due to cooling				1. Change the servo amplifier or cooling
		(MR-J2S-200A 350A)		fan stop.			fan.
							2. Reduce ambient temperature.

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