Techne SBS-2 Manual Del Operador página 23

Fault Bath not heating
Cause Incorrect power supply.
Action Check supply voltage and make sure it confirms to the voltage rating of the bath.
Cause Blown fuse.
Action Remove the fuse and check. Replace if necessary with identical fuse.
Cause Heater defective.
Action Connect an ammeter (range 25 Amps AC) into the power leads. Adjust heater
switch and observe the readings on the ammeter as follows:
SBS-2
SBS-2
SBS-4
SBS-4
Replace either heaters or switch as necessary.
Cause Energy regulator not functioning.
Action Connect an ammeter ( 25 Amps AC) in series with the power cord.
Fluidise the bed. Turn the energy regulator knob to 5 (and heater selector switch to
medium on SBS-4) and observe that the current alternates between 0 and the
minimum currents shown in the preceding paragraph. If no current flowing, check
remaining items and, if necessary, replace the regulator.
Cause Fail safe switch not functioning.
Action Repeat corrective procedure outlined above. The ammeter should read alternatively
as above. If these currents are not registered, check all other items in this section
and, if necessary, replace the fail safe switch.
Cause Internal wiring is damaged.
Action With the power cord disconnected remove the base plate of the unit and carefully
check all the wiring. Refer to the wiring diagram in this booklet.
Cause Failure of pneumatic circuit to fail safe switch.
Action Disconnect the pipe at the end not connected to the fail safe switch. Blow into the
tube. A definite click should be heard. Use the continuity meter to make sure that
the electrical contact is being made inside the switch.
120V
240V
120V Medium
High 12.4 Amp
240V Medium
High
6.2 Amp
3.1 Amp
6.2 Amp
3.1 Amp
6.2 Amp
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