Characteristics of the circuit card

how the pipe are laid out, and by noting where the suction is still good, it should be possible to logically work out where the stoppage is located.

5.Imagination? Many people, who just have had central vacuum cleaners installed, are making an error in determining the suc- tion, because the sound effects are absent.

1. Soft start

The moment of start is delayed with a TRIAC relay, giving a delay of start-up current to the motor with about 1 second. The start- up tension will in this way be much lower, which in turn means that the wear on fuses, circuits and motor will be lower.

2. Low tension LED Auto-polarity *2

The green LED for the power cable, which is on the unit, will always shine when there is current

3. Counter for hours worked *3

Through the use of EEPROM technology (program memory), the card registers two types of timings that the user can easily control, using a simple LED indicator that is placed on the shield of the circuit board.

a. Short time b. Total time

Time of use	LED colour	Meaning	Action

15 hours	Green	The vacuum cleaner	Change/control dust
	Change/control	has been used	bag and press con-
	Slow flashing	for 15 hours since	firmation button for
		last activation of the	5 seconds
		confirmation button

0–399 hours	Green	< than 400 hrs of use	----

400–499 hours	Orange	> than 400 hrs of use	Maintenance/inspect.

500–hours	Red	> than 500 hrs of use	Have the engine serviced

4. Test of functions

After the power cable has been connected, the circuit board performs a test of functions.

If everything is OK, the LED will flash rapidly for a few seconds and then stop. Delay in shutdown. When turning off the vacuum cleaner, a 2 second delay will be added in order to ensure that the pipes and the hose are empty when the unit is turned off. Reset / demo switch *6

Performs the following actions:

Position	Operation	Result

Test/demo	Press and release	The board will perform a test
	the switch	of functions and will go though
	within 5 seconds	all steps in the previous table
		(table 1)

Partial reset	If the motor does not	The system will reset the 15
	run, press the switch	hour counter to 0, the flashing
	for 5 seconds	the fashing LED (3) will continue

Total reset	Press the swithch	The system will reset the count-
	for more than 30	er for total time to zero
	seconds when the
	motor is running

7. Circuit breaker *7
The circuit board is	2 3 6 7
equipped with a circuit
breaker (Button marked
‘‘circuit breaker”.
To reset, press the
button.