Cooling
The cooling fan switches to a higher speed for a certain time after a few flashes.

Thermal overheating display
To protect against overheating after extended flash series, the unit will automatically switch off. At that stage, the following message will appear on the LCD display: "alarm: thermo" and the approximate time required for cooling. The cooling time is shortened if the unit remains connected and switched on.

Circuit breaker
In the event of an electrical malfunction, the circuit breaker (2) will automatically disconnect the power pack from the power source. The unit can be restarted by pressing the circuit breaker button. If it disconnects again immediately the power pack must be serviced by an authorised service station.