Carrier 50XJ064-104 specifications OL1, OL2, Epho, EPH1, OH2

Table 16 — Trip Messages for 50BV VFD (cont)

ERROR	COMMUNICATION	PROBLEM	POSSIBLE CAUSES	REMEDIES
CODE	NO.
OP3	C	Overvoltage during	• The input voltage fluctuates abnormally.	• Insert a suitable input reactor.
		constant-speed	(1) The power supply has a capacity of
		operation	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.	• Install a dynamic braking resistor.
			• The motor is in a regenerative state
			because the load causes the motor to run at
			a frequency higher than the inverter
			output frequency.
OL1	D	Inverter overload	• The acceleration ACC time is too short.	• Increase the acceleration time ACC.
			• The DC braking amount is too large.	• Reduce the DC braking amount F251
			• The V/F setting is improper.	and the DC braking time F252.
			• A restart signal is input to the rotating	• Check the V/F parameter setting.
			motor after a momentary stop, etc.	• Use F301 (auto-restart) and F302
			• The load is too large.	(ride-through control).
				• Use an inverter with a larger rating.
OL2	E	Motor overload	• The V/F setting is improper.	• Check the V/F parameter setting.
			• The motor is locked up.	• Check the load (operated machine).
			• Low-speed operation is performed	• Adjust OLN to the overload that the
			continuously.	motor can withstand during operation in a
			• An excessive load is applied to the motor	low speed range.
			during operation.
*EPHO	9	Output phase failure	• A phase failure occurred in the output line	• Check the main circuit output line, motor,
			of the main circuit.	etc., for phase failure.
				• Enable F605 (Output phase failure
				detection).
*EPH1	8	Input phase failure	• A phase failure occurred in the input line	• Check the main circuit input line for phase
			of the main circuit.	failure.
				• Enable F608 (input phase failure
				detection).
OH2	2Eh	External thermal trip	• A thermal trip command is entered from	• Check the external input device.
			an external input device.
*Ot	20h	Over-torque trip	• The load torque rises up to the over-torque	• Enable F615 (Over-torque trip selection)
			detection level during operation	• Check whether the system is in a normal
				condition.
OLr	F	Dynamic braking	• The deceleration time is too short.	• Increase the deceleration time dEC.
		resistor overload trip	• The dynamic braking amount is too large.	• Use a dynamic resistor with a larger
				capacity (W) and adjust F308 (PBR
				capacity parameter) accordingly.
OH	10h	Overheat	• The cooling fan does not rotate.	• Restart the operation by resetting the
			• The ambient temperature is too high.	inverter after it has cooled down enough.
			• The vent is blocked up.	• The fan requires replacement if it does
			• A heat generating device is installed close	not rotate during operation.
			to the inverter.	• Secure sufficient space around the
			• The thermistor in the unit is broken.	inverter.
				• Do not place any heat-generating device
				near the inverter.
				• Make a service call.
*UP1	1E	Undervoltage trip	• The input voltage (in the main circuit) is	• Check the input voltage.
		(main circuit)	too low.	• Enable F627 (undervoltage trip
				selection).
				• To cope with a momentary stop due to
				undervoltage, enable F302 (ride-through
				control) and F301 (auto-restart).

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