Teledyne gfc 7000ta operation manual Conc ALRM1, Conc ALRM2

Troubleshooting	Model GFC7000TA Carbon Dioxide Analyzer
Table 10-1: Warning Messages - Indicated Failures
WARNING	FAULT CONDITION	POSSIBLE CAUSES
MESSAGE
		Bad bench heater
BENCH TEMP	The optical bench temp is	Bad bench temperature sensor
		Bad relay controlling the bench heater
WARNING	controlled at 48 ± 2 °C.
		Entire relay board is malfunctioning
		I2C bus malfunction
		NOTE: Box temperature typically runs ~7oc warmer than
BOX TEMP	Box Temp is	ambient temperature.
		Poor/blocked ventilation to the analyzer.
WARNING	< 5 °C or > 48 °C.
		Stopped exhaust-fan
		Ambient temperature outside of specified range
CANNOT DYN	Dynamic Span operation failed	Measured concentration value is too high or low.
SPAN		Concentration slope value to high or too low
CANNOT DYN	Dynamic Zero operation failed	Measured concentration value is too high.
ZERO		Concentration offset value to high.
CONFIG	Configuration and Calibration data	Failed disk on chip
INITIALIZED	reset to original Factory state.	User erased data
CONC ALRM1	Concentration alarm 1 is enabled
	and the measured CO2 level is ≥
WARNING
	the set point.
CONC ALRM2	Concentration alarm 2 is enabled
	and the measured CO2 level is ≥
WARNING
	the set point.
DATA INITIALIZED	Data Storage in DAS was erased	Failed disk on chip
		User cleared data
PHOTO TEMP		Failed IR photo-detector
	PHT DRIVE is	Failed sync/demod board
WARNING	>4800 mVDC	IR photo-detector improperly attached to the sample chamber
		Bench temp too high.
REAR BOARD NOT	Motherboard not detected on	Warning only appears on serial i/o com port(s)
	power up.	Front panel display will be frozen, blank or will not respond.
DET
		Massive failure of mother board
RELAY BOARD	The CPU cannot communicate with	I2C bus failure
		Failed relay board
WARN	the Relay Board.
		Loose connectors/wiring
		Failed sample pump
SAMPLE FLOW	Sample flow rate is < 500 cc/min or	Blocked sample inlet/gas line
		Dirty particulate filter
WARN	> 1000 cc/min.
		Leak downstream of critical flow orifice
		Failed flow sensor/circuitry
SAMPLE PRES	Sample Pressure is <10 in-Hg or	If sample pressure is < 10 in-hg:
WARN	> 35 in-Hg	o Blocked particulate filter
	Normally 29.92 in-Hg at sea level	o Blocked sample inlet/gas line
	decreasing at 1 in-Hg per 1000 ft of	o Failed pressure sensor/circuitry
	altitude (with no flow – pump	If sample pressure is > 35 in-hg:
	disconnected).	o Pressurized sample gas. Install vent
		o Blocked vent line on pressurized sample/zero/span gas
		supply
		o Bad pressure sensor/circuitry

Teledyne Analytical Instruments 220