CytoTherm CT-4S Owner's Manual - Page 6
Browse online or download pdf Owner's Manual for Laboratory Equipment CytoTherm CT-4S. CytoTherm CT-4S 10 pages. Compact plasma thawing water bath with sliding agitation
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TROUBLESHOOTING
English: Unit should be opened by qualified technicians only.
French: Ne puet être ouvert que un techicien autorize.
Unit is "dead"
Computer does not boot when
turned on. Does not display
readable messages.
Display says "low water" but
there is water.
Unit does not heat but
"heating" is displayed
Temperature calibration does
not "hold", it changes .
Temperature calibration is out
of range.
Pump does not circulate. No hum.
Pump does not circulate. Makes
humming noise.
RACK not moving back and forth
MESSAGES, Troubleshooting
COLD indicates that the water temperature is less than 20.0C. As soon as the temperature rises above 20C, it
will display the true temperature.
TOO HOT is an audible and displayed alarm condition that indicates that the bath temperature is 1.0C higher
than the set temperature. If the operator pours hot water into the bath he/she will trigger this alarm.
This should never happen in normal operation. If it does, contact CytoTherm.
LOW WATER First make sure that a pinch ( 0.01 gr) of salt was added if deionized water was used. Pour water
into the BATH to the correct level (see SETTING UP).
Verify that you are plugged into a live, grounded outlet.
Have qualified technician check if fuse is blown or connectors are
loose. There are three fuses (see wiring diagram) in the unit. Fuse-1 &
Fuse-2 are located on the circuit board. 8Amp for 120Vac models and
5Amp for 240 Vac models. Fuse-3 is a ¾ Amp slow blow inline fuse
on the transformer 12 Vac line.
Unit is not responding, but the display is backlit. Backlit display
indicates that the unit has power. Turn unit off for at least 10 seconds
and turn unit back on. If this does not solve problem, replace the
computer (program module part# C4S-PM).
The unit is not sensing that water is present.
a. Make sure you are using tap water or adding salt to deionized
water to make it conductive.
b. The level sensor (screw inside the BATH on the right side) is dirty.
Scrape it and then clean with alcohol.
Was the unit filled with water over 40C.? If yes then cool the water to
20C to reset the safety thermostat.
Check the Safety thermostat (#C-TH) and the heaters (#14-77) for
continuity.
Replace temperature sensor (#CT4-TS).
Have technician check the voltage at TP1 (see wiring diagram) , it
should be 0.395 +/- .001 Vdc. If TP1 was correct, replace the
temperature sensor (#CT4-TS).
If TP1 was not correct, restore the unit to initial factory settings (see
DIAGNOSTICS) do full calibration. See Technician Functions > Full
Calibration.
No power to pump or pump winding open. Check the pump (#14-PM). DO
NOT DISASSEMBLE PUMP.
Blow air through pump outlet tubing to clear small obstruction. Check pump
(#14-PM). DO NOT DISASSEMBLE. Any evidence of leaking on motor side
means pump must be replaced.
Check if cam is loose on motor. Check the rack motor (#C4S-RKM).
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