If a possible heating element problem is indicated, take the following actions to troubleshoot the problem.
Verify that there is voltage supply on all three phases. If not, check the main fuses. Verify that the there is not a problem with the contactor. The contacts in the contactor could be damaged.
Connections to the elements need to be clean and tight. Resistive connections create heat and result in inefficient current flow.
Ensure that the element is viable. When the heating element is energized, use a clamp amp meter to see if all three legs flow the same current. Lack of current flow in a leg would indicate a burned out element.
If no amp meter is available, check continuity of the individual elements within a heating element with an ohm meter. To do this, the jumper bars must be removed. Elements can burn out from inefficient heat dissipation to the water. Low water or heavy calcium buildup is the major concern. Elements can also eventually burn out like a filament in an incandescent light bulb.
The destruction of an element may temporarily cause very high current flow which can cause arc damage to the contactor contacts. It is recommended as a matter of course to replace the heating element contactor along with the bad element.
Have a question or having difficulties? Talk to Dave Schall, our PRIMUS sterilizer expert who is here to assist you anytime at 877.679.7800 extension 1212 or email at email@example.com.
Visit us at spire-is.com