Thermo Scientific 5028i, Инструкция по эксплуатации

Страница: 164 / 330

Troubleshooting
Troubleshooting Guides
6-2 Model 5028
i
Instruction Manual Thermo Fisher Scientific
Table 6–1.
Troubleshooting - General Guide
Malfunction Possible Cause Action
No power Main fuses are blown are
missing
Check voltages from power supply.
Digital electronics defective Check that all boards and connectors
are seated properly.
Replace with spare boards to isolate
the problem.
No automatic filter
change
Reel nuts not tight Tighten reel nuts.
No more filter tape Replace with new filter tape.
Filter not properly adhered
or broken
Adhere filter tape to take-up reel and
wind over itself once.
Filter tape transport drive
motor defective
Replace motor.
Optical tape counter
defective
Replace optical tape transport sensor.
Pressure sensor(s)
board do not hold
calibration
Valves closed Verify D P valves on rear panel are in
the closed position.
Loose plumbing Verify all plumbing connections.
Pressure board defective Replace pressure printed circuit
board.
Highly variable
concentration
Recorder noise Replace or repair recorder and/or
leads.
Sample concentration
varying
Run Model 5028
i
on a zero filter – if
quiet, there is no malfunction.
Foreign material in optical
bench
Clean optical bench.
Digital electronics defective Replace board with a spare board.
Instrument does
not calibrate
properly
System leak Find and repair leak.
Pressure or temperture out
of calibration
Re-calibrate pressure or temperature.
Digital electronics defective Replace one board at a time with a
spare board to isolate the defective
board.
Flow Verify D P valves on rear panel are in
the closed position.
Re-calibrate.
Display is off Wrong contrast setting Adjust contrast setting.
LCD cable loose Check connection and cable integrity.
LCD defective Replace display.