HDS Middle Range / HDS Premium Range
Basic Settings and Service Procedures
Service Manual 04.2008
Page 71 / 127
Function
LED display
Meaning
Oil level sensor closed (float at top)
Setting
3.1.8 Testing the sensors
65 °C
INPUTTEST
This function can be
used to display the
states of the individual
sensors.
Each LED indicates the
state of a specific
sensor. Therefore,
several LEDs can be
simultaneously lit.
Example:
„ON“ pressure switch open
(pressure switch pressed)
Motor thermal contact closed
„Fuel tank“ reed switch closed
(float at top)
„Cleaning agent tank 1“ reed
switch open (float at top)
„Low-water protection“ reed
switch closed (water flow
available)
„OFF“ pressure switch open
(pressure switch pressed)
Exhaust thermostat closed
„Scale inhibitor tank“ reed switch
closed (float at top)
„Cleaning agent tank 2“ reed
switch open (float at top)
This display means:
– Oil level sensor open
(too little oil).
– „ON“ pressure switch
not pressed.
– Motor thermal contact
closed.
– „Fuel tank“ reed
switch closed (tank is
not empty).
– „Cleaning agent tank
1“ reed switch open
(tank is empty)
– „ L o w - w a t e r
protection“ reed
switch closed.
– „OFF“ pressure
switch not pressed.
– Exhaust thermostat
open (burner off).
– „Scale inhibitor tank“
reed switch closed
(float at top)
– „Cleaning agent tank
2“ reed switch open
(float at top).