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Milltronics SF 500 - INSTRUCTION MANUAL
7ML19985CN01
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Troubleshooting
Common Problems Chart
Symptom
Cause
Action
When trying to set the Sie-
mens Milltronics device
parameter, the parameter
remains unchanged.
External Error
Use keypad to set Parameter.
Parameter locked
Check the lock parameter (P000).
SW1 in left position
Switch SW1 (underneath display) to the right.
Display remains blank
Improper power
source wiring
Check wiring of power source.
Supply voltage is
incorrect
Ensure proper supply voltage is applied.
Power selection
switch is in wrong
position
Ensure power selection switch is in the cor-
rect position.
Faulty Fuse
Check to see if fuse is installed, or in good
condition.
Cables are not con-
nected properly
Check cables between display and mother-
board.
Display shows BF
Battery Failure
Check to see if battery needs to be installed,
or replaced
Keypad is not operative
Improper Cabling
Ensure cable connecting keypad to mother-
board is intact.
SW1 in left position
Switch SW1 (underneath display) to the right.
Incorrect security
settings
Check security code P000 and security level
P350.
LVDT Conditioning Card
doesn't function
Devices are not inter-
connected properly
Check interconnecting wiring between LVDT
and conditioning card and conditioning card
and the SF 500.
Devices are not inter-
connected properly
Check to ensure that SF 500 terminals 2 and
17 are interconnected.
Rate display seems to be
chaotic
Improper wiring
Check wiring from LVDT, or load cells).
Millivoltage levels are
incorrectly set
Measure millivoltage levels across SF 500
terminals 1 & 2 and compare to P940 01 (Load
Cell A) and, if applicable, across SF 500 termi-
nals 3 & 4 and compare to P940-02 (Load Cell
B). If there are major differences in readings,
contact Siemens Milltronics.
Memory Test P901 fails
Memory is bad
Contact Siemens Milltronics.
Error message flashing on
display
Error that occurred
some time ago, may
remain on display,
flashing
Verify if error is still active. Cycle SF 500 from
PROGRAM to RUN modes.