Della ductless-mini-split — Econo IF, Vario TL, and Optima TP single zone, and the multi-zone systems sharing the table Error Codes Directory

Della outdoor sensor codes: the letter after E names the sensor

All seven codes report a failed outdoor temperature sensor, and the character after the E identifies which one. None of them is a compressor fault, a refrigerant fault, or an indoor fault. Applies to: Econo IF, Vario TL, and Optima TP single zone, and the multi-zone systems sharing the table This table is published for the Della Econo IF, Vario TL, and Optima TP single zone series, and the multi-zone systems that share it. The Motto JA and Umbra JPB series use a different set entirely, where outdoor sensor faults appear as F codes, so the series has to be established before any of this applies. Owner-safe checks: Photograph the display so the exact character after the E is preserved, since several of them are easy to misread. | Note whether the code is constant or intermittent, and what the weather was doing when it appeared. | Record any work carried out at the outdoor unit since the system last ran normally. Qualified technician: Sensor circuits, connectors, and their resistance measurements sit inside the outdoor electrical compartment and are technician work with the supply isolated. | Question any proposal to replace a compressor or a control board on the strength of a code from this sensor table.