Toshiba G7 manual Alarms, Type Reset required select Clear run timer

Alarms

Table 10 lists the alarm codes that may be displayed during operation of the G7 ASD. Each alarm code listed is accompanied by a description and a possible cause. In the event that the source of the malfunction cannot be determined, contact your Toshiba Sales Representative for further information on the condition and for an appropriate course of action.

The Alarms are listed in the top-down order that they are checked for activation. Only the first to be detected will be displayed on the Frequency Command screen.

Table 10. G7 Alarms.

EOI	Function	Description		Possible Causes
Display
CM1	Comm1 Error	Internal communications error.	•	Improperly programmed ASD.
			•	Improper communications settings.
CM2	Comm2 Error	External communications error.
			•	Improperly connected cables.
EMG	Emergency Off	Output signal from the ASD is	•	StopReset pressed twice at the EOI.
		terminated and a brake may be	• EOFF command received remotely.
		applied if so configured.
			•	ASD reset required.
MOFF	Main	Undervoltage condition at the	•	Low 3-phase utility voltage.
	Undervoltage	3-phase AC input to the ASD.
OC	Over Current	ASD output current greater than	•	Defective IGBT (U, V, or W).
		F601 setting.	• ASD output to the motor is connected incorrectly.
				Disconnect the motor and retry.
			• ASD output phase-to-phase short.
			• The ASD is starting into a spinning motor.
			•	Motor/machine jammed.
			• Mechanical brake engaged while the ASD is starting or
				while running.
			• Accel/Decel time is too short.
			• Voltage Boost setting is too high.
			•	Load fluctuations.
			• ASD operating at an elevated temperature.
*OH	Overheat	ASD ambient temperature	•	ASD is operating at an elevated temperature.
		excessive.	• ASD is too close to heat-generating equipment.
			• Cooling fan vent is obstructed (see Mounting the ASD
				on pg. 18).
			• Cooling fan is inoperative.
			• Internal thermistor is disconnected.
OJ	Timer	Run-time counter exceeded.	•	Type Reset required; select Clear run timer.
* Reset ignored if active.

174 G7 ASD Operation Manual