Service Manual
Hako GmbH
Technical Service (KUD) 23843 Bad Oldesloe
Edition: 05/2014
Confidential - For internal use only!
6.5.2 Machine Safety Functions
Main broom function
The PIN4 at plug A is only grounded if the following input signals are sended:
The key lock have to be switched “ON”; Signal on PIN2 at plug A have to be “HIGH”
The seat contact switch have to be activated; or max. 3 sec. Deactivated. Signal on PIN5 at plug A have to be “HIGH”
The LDS have to send a signal that the battery is not “LOW”. Signal on PIN8 at plug A have to be “LOW”
Monitoring of start sequence
Driving will only be activated if firstly the key lock is “ON” and the seat switch is activated. PIN2 and PIN5 at plug A have to be “HIGH”.
Then a travel direction can be applied, by a “HIGH” signal at either PIN4 or PIN6 at plug B. Only if this sequence is done the travel will
be working.
Monitoring of ignition key
If the key lock is “ON” and the seat switch is deactivated for longer then 3 sec. Then the following action is taken:
The ground for the main broom relay is switched “OFF”. PIN4 at plug A is no longer grounded
The blower fan is switched “OFF”. PIN1 at plug D is no longer grounded
The warning horn is activated. PIN1 at plug A is grounded
To reset the warning, the key lock have to be switched “OFF” and then “ON” again
Monitoring of seat switch
If the input at PIN 5 at plug A is “HIGH” for longer then 6 h then the following action is taken:
The ground for the main broom relay is switched “OFF”. PIN4 at plug A is no longer grounded
The blower fan is switched “OFF”. PIN1 at plug D is no longer grounded
The warning horn is activated. PIN1 at plug A is grounded
The driving speed is reduced to half speed. Internal signal in the drive controller.
To reset this, the key lock have to be switched “OFF” and “ON” again and then the seat switch have to be switched “ON” and “OFF”
