Teledyne GFC7000EU manual Fault Condition Possible Causes Message, Warn

MODEL GFC7000EU CO ANALYZER WITH AUTO-REFERENCE

(Addendum to GFC7000E Manual PN 04584)

Warning	Fault Condition	Possible Causes
Message
FRONT PANEL	The CPU is unable to	WARNING only appears on Serial I/O COM Port(s)
WARN	Communicate with	Front Panel Display will be frozen, blank or will not
	the Front Panel	respond.
	Display /Keyboard	 Failed Keyboard
		 I2C Bus failure
		 Loose Connector/Wiring
PHOTO TEMP	PHT DRIVE is	 Failed IR Photo-Detector
WARNING	>4750 mVDC or	 Failed Sync/Demod Board
	<250 MVDC	 IR Photo-Detector improperly attached to the
		Sample Chamber
		 BENCH TEMP too high.
REAR BOARD	Mother Board not	WARNING only appears on Serial I/O COM Port(s)
NOT DET	detected on power	Front Panel Display will be frozen, blank or will not
	up.	respond.
		 Massive Failure of Mother Board
RELAY BOARD	The CPU cannot	 I2C Bus failure
WARN	communicate with	 Failed Relay Board
	the Relay Board.	 Loose connectors/wiring
PURGE PRESS	Purge Pressure	 Loss of purge flow
WARN	outside of warning	 Failed purge pressure sensor
	limits specified by	 Purge pressure regulator not set properly
	PURGE_PRESS_SET
	variable
SAMPLE PRES	Sample Pressure is	If Sample Pressure is < 15 in-HG:
WARN	<15 in-Hg or	 Blocked Particulate Filter
	> 35 in-Hg	 Blocked Sample Inlet/Gas Line
	Normally 29.92 in-	 Failed Pressure Sensor/circuitry
	Hg at sea level	If Sample Pressure is > 35 in-HG:
	decreasing at 1 in-	 Blocked Vent line on pressurized
	Hg per 1000 ft of
		Sample/Zero/Span gas supply
	altitude (with no
		 Bad Pressure Sensor/circuitry
	flow – pump
		 Failed Permapure dryer
	disconnected).
SAMPLE TEMP	Sample temperature	 Ambient Temperature outside of specified
WARN	is < 10oC or >	range
	100oC.	 Failed Bench Heater
		 Failed Bench Temperature Sensor
		 Relay controlling the Bench Heater
		 Failed Relay Board
		 I2C Bus
SOURCE	Occurs when CO Ref	 GFC Wheel stopped
WARNING	is <1250 mVDC or	 Failed Sync/Demod Board
	>4950 mVDC.	If Status LED’s on the Sync/Demod Board ARE
		flashing the cause is most likely a failed:
	Either of these	 IR Source
	conditions will result	 Relay Board
	in an invalid M/R	 I2C Bus
	ratio.	 IR Photo-Detector
SYNC	Phase Lock Loop	 GFC Wheel stopped
WARNING	(PLL) has lost lock	 GFC Wheel rotation very slow/dragging

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