Section Troubleshooting, Trips, Reset a Trip

Section 5 Troubleshooting

Trips	The trip display message is briefly displayed repeatedly (flashing) on the
	screen to warn of an imminent trip. Some trip conditions need time to take
	effect. The warning can allow you time to resolve the situation. The
	message will clear when you use the keypad, but after a short time will
	reappear until the problem is resolved, or the drive trips.
	When a trip occurs, the control’s power stage is immediately disabled
	causing the motor and load to coast to a stop. The trip is latched until action
	is taken to reset it. This ensures that trips due to transient conditions are
	captured and the Inverter is disabled, even when the original cause of the
	trip is no longer present. At this time, the activated alarm is displayed on
	the keypad display.
	Reset a Trip
	All trips must be reset before the Inverter can be re–enabled. A trip can
	only be reset once the trip condition is no longer active, i.e. a trip due to a
	heatsink over–temperature will not reset until the temperature is below the
	trip level. You can reset the trip as follows:
	1.	Press the	(STOP) key to reset the trip and clear the alarm from
		the display.
	2.	Remove and then re–apply the RUN command and the drive will run
		normally.

	Success is indicated by either	or the Local Setpoint being displayed.
Display	Trip Message and Meaning	Possible Reason for Trip
	DC LINK HIGH	The supply voltage is too high
	The Inverter internal dc link	Trying to decelerate a large inertia load too
	voltage is too high	quickly; DECEL TIME time too short
		The brake resistor is open circuit (400V unit
		only)
	DC LINK LOW	DC LINK low trip. Supply is too low/power down
	OVERCURRENT	Trying to accelerate a large inertia load too
	The motor current being drawn	quickly; ACCEL TIME time too short
	from the Inverter is too high	Trying to decelerate a large inertia load too
		quickly; DECEL TIME time too short
		Application of shock load to motor
		Short circuit between motor phases
		Short circuit between motor phase and earth
		Motor output cables too long or too many
		parallel motors connected to the Inverter
		FIXED BOOST level set too high
	HEATSINK	The ambient air temperature is too high
	OVERTEMPERATURE	Poor ventilation or spacing between Inverters
	Drive heatsink temperature >
	100ºC
		A current of less than 1mA is present when
		4–20mA setpoint is selected – look for a wire
		break

MN735

Troubleshooting 5–1