| Lights | Meaning | ||
| 1 | Red light flashes once every five seconds | Dead battery needs replacing – speak to Accommodation Office | |
| 2 | Red light flashes twice every five seconds | Low battery needs replacing – speak to Accommodation Office | |
| 3 | Red light flashes three times every five seconds | Not programmed properly – speak to Accommodation Office | |
| 4 | Red light flashes four times every five seconds | Valve fully closed | |
| 5 | Red light flashes five times every five seconds | Valve fully open | |
| 6 | Red light flashes continuously | Motor is running (wait until it’s finished) | |
| 7 | Green light constantly on | Not programmed properly – speak to Accommodation Office | |
| 9 | Red, yellow and green lights flash on at the same time | OK – instructions have been given correctly | |
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