Cata-Dyne™ Infrared Oven

Operation and Instructional Manual - Electrical Tests

WARNING! The following tests require opening the cover of the controller and must be performed by adequately trained personnel.  Hazardous voltages are present which can cause serious injury or death.

Turn the Power switch to the Off position.  You will see all display LEDs and lamps go off.  Remember, any power connections to the controller are still live.  CAUTION! High voltage (120 VAC, 208 VAC, 220 VAC, 315 VAC, 480 VAC, or 600 VAC) is present on circuit components such as relay boards, contactors, and temperature controllers. The only means to shut power off is at the circuit breaker.  Consult the External Control Cabinet Wiring Diagram for specific details.  Be certain all breakers are shut off before performing any tests or hook-ups!

Test power supply fuses by turning off sources of power at the breaker panel and using a continuity tester across the four fuses on the AC power (AP) card.  This card is located at the top right hand corner of the back of the control panel.  Also check the fuses on the dual relay (DR) cards, located on the inside of the lid.  Turn power back on and use an AC voltage tester to check for 120/208 VAC at the input of the AP card and for 12/24 VAC at the output terminals of the AP card.

Remove the steel cover plate that covers the high voltage section and check the electric element fuses and the incoming power.  The fuses may be tested and replaced by turning off incoming power at the breaker panel and using a continuity tester on each fuse.  The incoming power is tested by turning the circuit breaker back on, then measuring the voltage on the input lugs of the contactors.  120, 208, 220, 315, 480 or 600 VAC should be present between the lugs. The disconnect switch will be turn on manually. Since the higher voltages are very dangerous, extreme caution must be employed when taking these measurements.

Next, turn the Power On/Off switch back on and measure the voltage at the output of the relay cards or contactors.  On contactors, this is the three metal strips and lugs near  the top of the contactor. The voltage measured at the inputs of the relay card or contactor should also be present across each of these outputs.

Finally, check the electric preheat element current using a clamp-on ammeter.  This value should agree with the current requirement in the system specification.

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