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Not Getting the Correct Vacuum Out of Your Thermotic Pump?
Before swapping out the board or going through a lengthy calibration set-up and
procedure, try checking the following:
- Check tubing and connections for leaks that could compromise
the vacuum.
- Check the integrity of the suction valve (RPI Part #GOV011)
and pressure valve (RPI Part #GOV012);
these could be leaking or stuck open.
- Verify that the voltage supply is approximately 115V.
- Verify gauge performance with a known vacuum supply.
- Verify that the triac is firing on both halves of the cycle.
This can be accomplished using a voltmeter placed across the heater. When the
triac is conducting, the entire supply voltage (approximately 115V) should be
across the heater.
- Verify the resistance of the heater: 160ohm (RPI Part #GOH005).
- Check that the heater cylinder is prop-erly sealed.
If all of these items check out, it might be time to recalibrate
or replace the board. If a new board is needed, contact RPI and ask for RPI
Part #GOB016
(old style) or RPI Part #GOB023
(new style). |
