Teledyne GFC 7001E Fault Condition Possible Causes Message, Cannot DYN, Config, Initialized, Warn

Troubleshooting & Repair		Model GFC7001E Carbon Dioxide Analyzer
	Table 13-1: 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 ambient
BOX TEMP	Box Temp is	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
DATA INITIALIZED	Data Storage in iDAS was erased	Failed disk on chip
		User cleared data
	The CPU is unable to Communicate	Warning only appears on serial I/O com port(s)
FRONT PANEL		Front panel display will be frozen, blank or will not respond.
	with the Front Panel Display	Failed keyboard
WARN
	/Keyboard	I2C bus failure
		Loose connector/wiring
PHOTO TEMP	PHT DRIVE is	Failed IR photo-detector
		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 power	Warning only appears on serial I/O com port(s)
DET	up.	Front panel display will be frozen, blank or will not respond.
		Massive failure of motherboard
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	3	Blocked sample inlet/gas line
	Sample flow rate is <3500 cm /min	Dirty particulate filter
WARN	or > 1000 cm /min.	Leak downstream of critical flow orifice
		Failed flow sensor/circuitry
	Sample Pressure is <10 in-Hg or	If sample pressure is < 10 in-hg:
		Blocked particulate filter
SAMPLE PRES	> 35 in-Hg	Blocked sample inlet/gas line
	Normally 29.92 in-Hg at sea level	Failed pressure sensor/circuitry
WARN	decreasing at 1 in-Hg per 1000 ft of	If sample pressure is > 35 in-hg:
	altitude (with no flow – pump	Pressurized sample gas. Install vent
	disconnected).	Blocked vent line on pressurized sample/zero/span gas supply
		Bad pressure sensor/circuitry

Teledyne Analytical Instruments 269