FMS Fault Correction
General Faults (A)
Aids
A1
Display remains dark
Check whether there is a voltage present on the unit
all LEDs are off
Check "F1" fuse (back of the unit in cold unit case)
Check connectors for correct seating
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A2
Display remains dark
After changing an EPROM or RAM
or shows confused characters,
-
take out processor card
some or all LEDs light up
Check modules for correct polarity
or fault 111, 140
(all notches point in same direction)
Check that all modules are correctly seated in the bases
(any prongs bent over), if necessary push in again
Check correct seating of the processor card connection to backplane
Check correct seating of the power supply card connection to the backplane
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A3
"AU" does not appear
Cause: mode selector switch is not set to automatic
between the channels
or signal on terminal 2 is not equal to zero
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A5
"Store" does not appear on display
No curve point was modified or the modification was lost
when switching from "Setting”
to Automatic
Repeat programming
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A7
Fault in an internal self-test
Reset fault, possibly turning mains voltage off and back on
Check all fuses in the unit
If fault message occurs repeatedly in succession change unit or
respective card
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A9
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Fault 105
When reading the redundant data in the EEPROM an error was discovered.
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Rest fault, if fault still persists
EEPROM possibly defective
Re-enter curve
Enter parameters again or check
If fault persists:
Change EEPROM and read in curves and parameter again,
see A12
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