Toshiba 1600XP manual System Fault Messages, Display Meaning Action

System Fault Messages

A Fault message is generated when either a fault condition occurs, or a warning condition occurs three times within ten minutes. The table below shows the possible fault messages and what actions need be taken.

If the input voltage is normal when the fault occurs then the UPS will switch immediately to the bypass mode to continuously feed power to the load.

If the fault condition occurs while the input power is abnormal and the UPS is in Bypass mode the UPS will shut down the output to prevent load equipment damage.

When a Fault condition exists, the red LED on the UPS display panel will illuminate until the fault is cleared.

Display	Meaning	Action
BYPOH	Bypass Overheat – Overheating	Check unit for blocked or in-operable fan. Lower am-
	condition occurred.	bient temperature if it is greater than 104 °F (40 °C).
		Bypass operation will also cease if overheat condition
		is not corrected within 1 hr. of inverter shutdown. Try
		restarting. If condition re-occurs plan for total shut-
		down and call for service.
BYPOL	Bypass Overload – UPS is over-	Shut down excess equipment to reduce load.
	loaded.
CHRGOV	Charger Overvoltage – Charger	UPS is possibly faulty. Check the UPS operation
	overvoltage condition occurred.	conditions at time of fault. Not advisable to restart the
		UPS. Call for service.
CLMT	Current Limit – Load on UPS out-	Reduce load on UPS output.
	put exceeds unit specifications.
DCIB	DC Bus Imbalance – DC voltage	Possible causes are UPS fault are connection of half-
	imbalance occurred.	wave rectifier load. Check load and try restarting. If
		condition persists, call for service.
DCOC	DC Bus Overcurrent – DC overcur-	UPS is possibly faulty. Check the UPS operation
	rent condition occurred.	conditions at time of fault. Not advisable to restart the
		UPS. Call for service.
DCOV	DC Bus Overvoltage – DC over-	UPS is possible faulty, input wiring error, input over-
	voltage condition occurred.	voltage or connection of a motor load. Try restarting. If
		condition persists call for service.
DCUVBS	DC Bus Undervoltage during	UPS is possibly faulty. Check the UPS operation
	Boostup Mode – DC Bus under-	conditions at time of fault. Not advisable to restart the
	voltage condition occurred.	UPS. Call for service.
DCUVC	DC Bus Undervoltage During	UPS is possibly faulty. Check the UPS operation
	Charging Mode – DC Bus under-	conditions at time of fault. Not advisable to restart the
	voltage condition occurred.	UPS. Call for service.
DVCOH	Device Overheat – Overheating	Reduce equipment load to 100% or less and try
	condition occurred.	restarting.
FSOPEN	Fuse Open.	Replace fuse.
INVOLNR	Inverter Overload (Not Reset-	Reduce equipment load to 100% or less and manually
	table) – Output overload condition	restart the UPS.
	occurred.

62 1600XP Series Installation and Operation Manual