Emerson 2468CB, 2468CD 2-28, Indication, Faults, Analysis and Corrective Action, State 5 contd

2468CB & 2468CD Dual Power Supply Version Hydrastep 2468CB and 2468CD Manual

Indication	Fault(s)	Analysis and Corrective Action
State 5 (contd.)	Integral circuit fault	If the wiring checks carried out as described above
	on right hand circuit	have not located the fault, then it is possible and
	board or the display	internal fault exists.
	board	1. Disconnect the electrode cable sockets from the
		input boards.
		2. Make up four 10-way sockets (six or eight sockets
		required for systems with more than 16 points) with
		wire links connecting the following pins on each
		socket: 1-2, 4-5, 6-7, 9-10.
		3. Insert these sockets in place of the electrode cable
		sockets in the input boards. The level display
		should now show an all steam state and no fault
		indication. If this does not occur an internal fault
		exists.
		The circuit fault may be on either input board or the
		display board. If spares are available, change the right
		hand input board first and if the fault is not rectified
		change the display board, followed by the left hand
		input board. If spares are not available, call the service
		engineer.
State 6	Internal circuit fault	This state is indicating a fault which is not related to an
Bottom half of	on right hand circuit	electrode error because no LED pairs are alternating
	board or the display	between water and steam. It is therefore likely that an
fault LED
	board	internal fault exists.
illuminated
		Follow same procedure as above.
No LED pairs
alternating
between water
and steam
	Table 2.3 - Fault analysis/corrective action chart (continued)

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