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Hydrastep 2468CB and 2468CD Manual 2468CB & 2468CD Dual Power Supply Version
24685034 2-29
Indication Fault(s) Analysis and Corrective Action
State 7
Only odd or
even LEDs
illuminated
No power to one
input board or a
power supply fault
Only odd LEDs illuminating indicates a problem with
the left hand input board. Only even LEDs illuminating
indicates a problem with the right hand input board.
Check the wiring to the unit from the mains supply
then check the following:
Fuse and fuse rating
Voltage and voltage setting
(See Section 2.2 & 2.3 of this chapter)
If none of these checks locate the problem and the
correct mains supply voltage is present at the input
board terminals then a circuit fault exists and
replacement of the faulty input board is required.
State 8
Chequered
pattern on RED
& GREEN LED
display
Wrong setting of
Number of
Electrodes switch
on display board
Refer to Section 2.3 of this chapter and ensure that the
switch is set correctly. If the display still shows a
chequered pattern then a circuit fault exists on the
display board and the board will need replacing.
State 9
ON/OFF pattern
on RED &
GREEN LED
display
Wrong setting of
Number of
Electrodes switch
or linking on LK2,
LK3, LK4, LK5
incorrect on display
board
As above
State 10
Lower
electrodes not
displayed
As above As above
Table 2.3 - Fault analysis/corrective action chart (continued)