No voltage on Hydraulic Unit — The indoor unit has no power

What does No voltage Hydraulic Unit mean?

The hydraulic unit appears to have no power, with no display or indicator lights. This suggests an issue with the power supply to the indoor unit.

• Tripped circuit breaker for the hydraulic unit.
• Faulty wiring or loose connections.
• External causes such as noise or voltage drop in the electrical circuit.
• Faulty electrical components within the Hydraulic Unit, such as a blown fuse or varistor.

Click steps to track your progress.

1. 1

   Check if the circuit breaker for the hydraulic unit is cut off and reset it if necessary.

2. 2

   Inspect the wiring to the hydraulic unit for any visible damage or loose connections.

3. 3

   Check if other electrical devices on the same circuit might be causing a drop in voltage or current leaks.

4. 4

   Verify that a voltage between AC 198 and AC 264 V exists between terminals 1 and 2 on the Hydraulic Unit terminal block (only for qualified personnel).

5. 5

   If these checks are unsuccessful, the Interface PCB or its fuse/varistor may be faulty and need replacement by a qualified technician.