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External contactors used with the APS-4C?

by | Jul 26, 2017 | APS-C Series FAQs

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, a SC-40C satellite...

Why do I have a red GFEP light on?

by | Jul 26, 2017 | APS-C Series FAQs

The GFEP indicator will come on when a ground fault occurs in one of the heater circuits. The insulating resistance of the heater cable is breaking down or the cable has been damaged allowing current to pass to ground thru an incorrect pathway. Left un-repaired the...