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Updated June 10, 2026 · by Klemens Berling

Every radio remote needs a counterpart on the vehicle: the receiver unit. It receives the radio commands of the ISAR 3 and turns them into movements of the tipping hydraulics. This page explains how the interplay works.

The counterpart to the transmitter

While the remote sits in the hand of the operator, the receiver unit is permanently mounted on the tipper and integrated into the vehicle electrics. It checks every received radio signal and only actuates the hydraulic valves when the command comes from its paired transmitter.

Pairing: the fixed relationship

Transmitter and receiver unit are paired once. This coded link ensures that no other remote controls the vehicle, even when several tippers work side by side. After one side is replaced or reset, the procedure is simply repeated.

Who is responsible for faults

If no remote at all reacts on the vehicle, suspicion falls on the receiver unit. Because it is integrated into the vehicle electrics, a specialist workshop usually checks and replaces it. For the transmitter, the ISAR 3 itself, we are responsible: diagnosis, repair and tested replacement devices.

Frequently asked questions

How do I tell whether the transmitter or receiver unit is faulty?

With the cross-test: if several remotes fail on the same vehicle, the receiver unit is usually affected. If one remote fails on several vehicles, the transmitter is to blame.

Does ControlRepair24 also repair receiver units?

We specialise in the remote. Due to its integration into the vehicle electrics, the receiver unit belongs in a specialist workshop, but we are happy to help narrow the fault down.

Does the receiver unit need replacing when the transmitter is swapped?

No. If the receiver unit is intact, pairing the new replacement device once is enough. That is exactly how our exchange system works.