44
Troubleshooting Table Advanced
™
Osmometer 3250/Cryoscope 4250 Service Manual
Symptom Explanation Suggested Action
18. “Fan System Failure” The fan is not functioning properly. 1. Check fan driver/control circuit.
2. Make sure the fan is plugged in.
3. Make sure the fan isn’t blocked.
4. Check the fan driver LED on the
application board.
5. To check fan, disconnect and
connect to bench-top 12 VDC
power supply.
6. Replace the fan or application
board.
19. “Flash Boot
Program”
The instrument is configured to
receive Flash EPROM updated code.
7. If intentional, perform download
process as described in this
manual.
8. If not intentional, turn off power
and set three-position Operator/
Supervisor keyswitch to Operator
or Supervisor position.
9. Check processor board option
switch SW1 position 3 and set to
OPEN/OFF/0 (see Option Switch
Setup Table).
20. ‘FPE_INTOFLOW”
“FPE_INTDIV0”
“FPE_INVALID”
“FPE_ZERODIVIDE”
“FPE_OVERFLOW”
“FPE_UNDERFLOW”
“FPE_INEXACT”
“FPE_STACKFAULT”
“FPE_EXPLICITGEN”
“FPE_UNDEFINED”
Indicates various floating point math
errors have occurred.
1. Turn the power off and on.
2. Replace the processor board.
21. “Head Not Up”
“Head Not Down”
The head up/down mechanism may
not be functioning properly.
1. Check the motor, clutch assembly
and relays by running the head
up/down test.
2. Check the Head Up or Head Down
position sensor.
3. Check LED indicators on
application board.
22. ID None No sample ID was recorded when
test was run.
1. Are you using ID? If no, ignore
message.
2. Verify ID # prints at the end of
your test.
3. Reboot and check for Low Battery
message.
23. “Insufficient Data” Less than two valid results were
found in the requested statistics
calculation.
1. Change the number of samples
requested for statistical
calculations.
2. Continue testing to add more
results to the buffer.
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