| 1. Disconnect a wire from the negative plug of the storage battery. |
| 2. Disconnect a socket from the electromagnetic valve. |
| 3. Measure resistance between contact 7 sockets and "weight". Resistance: 4,1–5,1 Ohm |
| 4. If connection is absent, check up an electric chain on breakage or short circuit or replace the valve of management with pressure. |
| 5. Connect a socket to the electromagnetic valve. |
| 6. Connect a wire to the negative plug of the storage battery. |