Omron Healthcare VARISPEEDF7 specifications EN-22, OH1, OL1, OL2, Pgo

Display	Alarm	Fault	Meaning		Corrective Actions
				•	Remove the motor and run the Inverter
					without the motor.
OC			Over Current	•	Check the motor for a phase-to-phase
			The Inverter’s output current exceeded the over-		short.
Over Current
			current detection level.	•	Verify the accel/decel times (C1-††).
				•	Check the Inverter for a phase-to-phase
					short at the output.
			Heatsink Overheat	•	Check for dirt build-up on the fans or heat-
			L8-03 = 0,1 or 2 and the temperature of the
					sink.
OH			Inverter's cooling fin exceeded the L8-02 value.
				•	Reduce the ambient temperature around
			Inverter's Cooling Fan Stopped
Heatsnk Overtemp					the drive.
			L8-03 = 3 or 4 and the temperature of the
				•	Replace the cooling fan(s).
			Inverter's cooling fin exceeded the L8-02 value.
			Heatsink Overheat	•	Check for dirt build-up on the fans or heat-
OH1			The temperature of the Inverter’s heatsink		sink.
			exceeded 105 °C.	•	Reduce the ambient temperature around
Heatsink Max Temp
					the drive.
			Inverter’s Cooling Fan Stopped
				•	Replace the cooling fan(s).
			Motor Overload
			Detected when L1-01 is set to 1,2 or 3 and the	•	Recheck the cycle time and the size of the
			Inverter’s I²t value exceeded the motor overload		load as well as the accel/decel times (C1-
			curve.
OL1					††).
			The overload curve is adjustable using parame-	•
Motor Overload			ter		Check the V/f characteristics (E1-††).
				•	Check the setting of Motor Rated Current
			E2-01 (Motor Rated Current), L1-01 (Motor Pro-
			tection Selection) and L2-02 (Motor Protection		Setting (E2-01).
			Time Constant)
				•	Recheck the cycle time and the size of the
			Inverter Overload		load as well as the accel/decel times (C1-
OL2					††).
			The Inverter output current exceeded the Invert-	•
Inv Overload			ers’s overload capability		Check the V/f Characteristics (E1-††).
				•	Check if the inverter rated current matches
					the motor rated current.
			F1-03 = 0, 1 or 2 and A1-02 = 1 or 3
			The motor speed feedback (U1-05) exceeded
			the setting in F1-08 for a time longer than the	•	Adjust the ASR settings in the C5 parame-
			setting of
					ter groupt
OS			F1-09
				•	Check the reference circuit and reference
Overspeed Det.
			F1-03 = 3 and A1-02 = 1 or 3
					gain.
			The motor speed feedback (U1-05) exceeded
				•	Check the settings in F1-08 and F1-09
			the setting in F1-08 for a time longer than the
			setting of
			F1-09
			The DC bus voltage has exceeded the overvolt-	•	Increase the deceleration time (C1-02/04)
			age detection level.		or connect a braking option.
OV	(only in			•	Check the power supply and decrease the
	stop		Default detection levels are:
DC Bus Overvolt					voltage to meet the inverter’s specifica-
	condi-		200 V class: 410 VDC
					tions.
	tio)		400 V class: 820 VDC
				•	Check the braking chopper / resistor.
PF			Input Phase Loss	•	Tighten the input terminal screws
			Too big DC bus voltage ripple.
Input Phase Loss				•	Check the power supply voltage
			Only detected when L8-05=1 (enabled)
			PG Disconnection
			Detected when F1-02 = 0, 1 or 2 and A1-02 = 1
			or 3.	•	Fix the broken/disconnected wiring.
			Detected when no PG (encoder) pulses have	•	Supply power to the PG properly.
PGO			been received for a time longer than the setting
PG Open			in F1-14.	•	Check the sequence and if the brake is
					opened when the inverter starts to increase
			PG Disconnection
					the speed.
			Detected when F1-02 = 3 and A1-02 = 1 or 3.
	
			PG (encoder) pulses have not been received for
			a time longer than the setting in F1-14.

EN-22