Dilo SF6 - Page 49

Fault correction
www.dilo-gmbh.com | 0800.bae
List for other breakdowns:
Error message Possible cause of error Correction
The compressor does not
reach any high output
pressure
The incorrect solenoid valves are
opened.
Defective piston rings and valve
seats
Check the position of the solenoid
valves.
Check the compressor according to
the operating instruction “Pressure
test”
The indicated final vacuum
of 0.75 Torr is not reached
during the recovery
process
The solenoid valves on the suction
side are closed.
The suction pump does not switch
on.
Leak on the recovery line.
Defective suction pump.
Defective regulating valves.
Check the position of the solenoid
valves.
Check the corresponding pressure
switches.
Check the recovery line.
Check the pump (sounds, temperature
and current consumption)
Check the movement of the regulating
valve
The vacuum pump does
not reach the final vacuum
Solenoid valve upstream from the
vacuum pump is closed
Not enough oil
Incorrect oil
Humidity in the oil
(white colour of the oil)
Defective vacuum controller or
sensor
Check the position of the solenoid
valves.
Refill oil
Exchange oil and filter
Exchange oil and filter
Exchange vacuum controller or sensor
“1999" indication on the
temperature regulating
device
Interruption or short-circuit in the
temperature sensor or in the
connecting cable
Check the resistance of the connected
PT-100-sensor
(~ 100 at 20°C )
The evaporator does not
heat
Due to excess temperature the
safety temperature limiter
has switched off
Press in the blue button of the safety
temperature limiter (see label in the
terminal box of the evaporator)
Check the temperature control of the
evaporator.