External contactors used with the APS-4C?

No, using external contactors will cause the GFEP circuit on the APS-4C to detect the inductive load of the contactors coil as ground fault and alarm the system every time the contactor is turned on. In order to increase the size of the application,...

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Delay between SC-40C and APS-4C?

by David Mays | Jul 26, 2017 |

APS-4C, APS-C Series FAQs, delay, SC-40C

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Why is there a delay between when the APS-4C turns on and when the SC-40C comes on?

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Snow light on SC-40C stays on longer than APS-4C

by David Mays | Jul 26, 2017 |

APS-4C, APS-C Series FAQs, SC-40C, snow, snow light

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The snow light stays on longer for the SC-40C than the APS-4C because the APS-4C gets its command from an actual snow sensor where the SC-40C’s get their command from the APS-4C.

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Is a snow sensor required for a SC-40C?

by David Mays | Jul 26, 2017 |

APS-4C, APS-C Series FAQs, ice, SC-40C, sensor, snow

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No, the SC-40C does not use a snow sensor, it is completely controlled by the attached APS-4C. However, the SC-40C does require the High-Temperature sensor Thermistor to be connected (or bypassed with a 470K-ohm resistor) in order for the unit to...

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How do I connect my SC-40C to my APS-4C?

by David Mays | Jul 26, 2017 |

APS-4C, APS-C Series FAQs, connect, SC-40C

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APS-4C to SC-40C connections are done on the Class 2 terminal blocks on both units as follows.

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Why is the GFEP light flashing on my APS-4C?

This indicates that there is a ground fault on one of the attached SC-40C satellite controllers. The SC-40C that has the ground fault will have a solid red GFEP light and will not allow the heaters to be powered. Isolating the heater leg that has...

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En-Lightening APS-4C and SC-40C

Environmental Technology Inc.'s David Mays shares his insights on specific or unanticipated situations end users encounter with their ETI products. Here he illuminates the tricky mix of APS-4C and SC-40C status lights and system operations.

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Troubleshooting the SIT-6E Snow Sensor

Environmental Technology Inc. demands the most and the best out of the products it manufactures and distributes. In a less than perfect world, however, less than ideal situations occur.

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APS-4C commlink to SC-40

Environmental Technology Inc. has developed and manufactured controllers and sensors for ice and snow management for 45 years. The quality of its products is reflected in the opportunities presented to connect newer products—such as the Snow Switch®...

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Temperature Sensor Placement?

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