Emerson GXT5000R-208 user manual Troubleshooting guide

Table 3	Troubleshooting guide
Fault	LED	Audible	Condition	Response
classification	display	alarm		time
			± Bus V > 450 VDC	80 ms
Bus	C & F		± Bus V > 410 VDC	1.5 seconds
		Continuous
			± Bus V < 230 VDC	80 ms
fault	LEDs
			(Abnormal + Bus V)-(-Bus V ) > 40 VDC or	2 minutes
			(+Bus V)-(Abnormal -Bus V) > 35 VDC
			Inverter output power > 276 VAC or	Minimum
Inverter	B & F	Continuous	Inverter output power < 140 VAC	90 ms
fault	LEDs
			Inverter output power short. UPS short circuit	5 cycles
			fault.
			If temperature is > 90°F (32°C) detected	5 seconds
			NTC’s temperature on CNTL pcb.
Overtemp	A & F
		Continuous	If temperature > 65°F (18°C) and < 90°F
fault	LEDs		(32°C), then transfer to bypass mode, and	4.5 seconds
			wait until temperature < 40°F (5°C) then back
			to inverter mode
Battery	D & F	Continuous	Battery voltage > 15V per unit	6.4 seconds
overvoltage fault	LEDs
Battery mode	E & F	0.5 second	Battery mode load > 105%, < 125%	1 minute
		beep, recurring	Battery mode load > 125%, < 150%	10 seconds
overload alarm	LEDs
		every 1 second
			Battery mode load > 150%	Instantaneous
Bypass	A, B & F	Continuous	Try to turn unit on (inverter mode). Check	Instantaneous
fault	LEDs		output load for shorts.
Relay bonded	A, C & F		Check inverter output voltage, before inverter
		Continuous	soft start. If detected inverter output voltage	Instantaneous
on N.O.	LEDs
			> 85 VAC, then set fault.
Inverter mode			If detected inverter output power I > 70 ADC
			and output voltage < 90 VDC, then increase
output power	A, D & F
		Continuous	{short_cnt}.	Not specified
short circuit	LEDs
			If {short_cnt} > 30 any time in period of
fault
			96 ms, then set UPS short circuit fault.
Line LED			Line voltage > 276 VAC	48 ms
	—	—
				160 ms or
flash warning			Line voltage < 170 VAC
				(48 ms)
Battery	BAT LED	0.5 second	When UPS turn off charger and detected
disconnected		beep, recurring		Instantaneous
	flashing		battery voltage < 10 VDC per unit
warning		every 1 second
Battery fail	BAT LED	Continuous	When the UPS is in battery test sequence
			and detected battery voltage < 10 VDC per	Instantaneous
warning	flashing
			unit
Bypass mode	All LEDs bright,		Bus overvoltage > 400 VDC or
bus overvoltage		Continuous		Not specified
or input voltage	buzzer beeping		input voltage > 292 VAC
too high fault
Input voltage	All LEDs bright,	Continuous	Check input voltage—must be greater than	Not specified
> 292 VAC	buzzer beeping		292 VAC.
BUS voltage	All LEDs bright,	Continuous	Check the BUS voltage—must be lower than	Not specified
fault	buzzer beeping		242 VDC.

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