Carrier 50XJ064-104 specifications Non-Trip Messages for the 50BV VFD, Trip Messages for 50BV VFD

Table 15 — Non-Trip Messages for the 50BV VFD

ERROR	PROBLEM	POSSIBLE CAUSES	REMEDIES
CODE
OFF (Note 1)	ST terminal OFF	• The ST-CC circuit is opened.	• Close the ST-CC circuit.
NOFF	Undervoltage in main	• The supply voltage between R, S and T is	• Measure the main circuit supply voltage.
	circuit	under voltage.	If the voltage is at a normal level, the
			inverter requires repairing.
rtrY	Retry in process	• The inverter is in the process of retry.	• The inverter is normal if it restarts after
		• A momentary stop occurred.	several tens of seconds.
			The inverter restarts automatically. Be careful of the
			machine because it may suddenly restart.
Err1	Frequency point	• The frequency setting signals at points 1	• Set the frequency setting signals at points
	setting error	and 2 are set too close to each other.	1 and 2 apart from each other.
CLr	Clear command	• This message is displayed when pressing	• Press the STOP key again to clear the
	acceptable	the STOP key while an error code is displayed.	trip.
EOFF	Emergency stop	• The operation panel is used to stop the	• Press the STOP key for an emergency stop.
	command acceptable	operation in automatic control or remote	To cancel the emergency stop, press any other key.
		control mode.
HI/LO	Setting error alarm /	• An error is found in a setting when data is	• Check whether the setting is made
	An error code and	reading or writing.	correctly.
	data are displayed
	alternately twice each.
db	DC braking	• DC braking in process	• Normal if the message disappears after
			several tens of seconds. (See Note 2.)
In It	Parameters in the	• Parameters are being initialized to default	• Normal if the message disappears after a
	process of initialization	values.	while (several seconds to several tens of seconds).
	Setup parameters in	• Setup parameters are in the process of	• Normal if the message disappears after a
	the process of being set	being set.	while (several seconds to several tens of seconds).
Atn	Auto-tuning in process	• Auto-tuning is in process.	• Normal if the message disappears after
			several seconds.

NOTES:

1.ST : Terminal of stand by function.

2.When the ON/OFF function is selected for DC braking (DB), using the input terminal selection parameter, you can judge the inverter to be normal if “db” disappears when opening the circuit between the terminal and CC.

Table 16 — Trip Messages for 50BV VFD

ERROR	COMMUNICATION	PROBLEM	POSSIBLE CAUSES	REMEDIES
CODE	NO.
OC1	1	Overcurrent during	• The acceleration time ACC is too short.	• Increase the acceleration time ACC.
		acceleration	• The V/F setting is improper.	• Check the V/F parameter.
			• A restart signal is input to the rotating	• Use F301 (auto-restart) and F302
			motor after a momentary stop, etc.	(ride-through control).
			• A special motor (e.g. motor with a small	• Increase the carrier frequency F300.
			impedance) is used.
OC2	2	Overcurrent during	• The deceleration time dEC is too short.	• Increase the deceleration time dEC.
		deceleration	(During deceleration)
OC3	3	Overcurrent during	• The load fluctuates abruptly.	• Reduce the load fluctuation.
		operation	• The load is in an abnormal condition.	• Check the load (operated machine).
OCR	5	Arm overcurrent at	• A main circuit element is defective.	• Make a service call.
		start-up
OCL	4	Overcurrent (An	• The insulation of the output main circuit or	• Check the cables and wires for defective
		overcurrent on the	motor is defective.	insulation.
		load side at start-up)	• The motor has too small impedance.
OP1	A	Overvoltage during	• The input voltage fluctuates abnormally.	• Insert a suitable input reactor.
		acceleration	(1) The power supply has a capacity of
			200kVA or more.
			(2) A power factor improvement capacitor is
			opened or closed.
			(3) A system using a thyristor is connected
			to the same power distribution line.
			• A restart signal is input to the rotating	• Use F301 (auto-restart) and F302
			motor after a momentary stop, etc.	(ride-through control).
OP2	B	Overvoltage during	• The deceleration time dEC is too short.	• Increase the deceleration time dEC.
		deceleration	(Regenerative energy is too large.)	• Install a suitable dynamic braking resistor.
			• F304 (dynamic braking resistor	• Enable F304 (dynamic braking selection).
			activation) is off.	• Enable F305 (overvoltage limit operation).
			• F305 (overvoltage limit operation) is off.	• Insert a suitable input reactor.
			(1) The input voltage fluctuates abnormally.
			The power supply has a capacity of
			200kVA or more.
			(2) A power factor improvement capacitor is
			opened or closed.
			(3) A system using a thyristor is connected
			to the same power distribution line.

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