Dometic Frigo DC Operating Manual page 20

Faults
Fault
code
20
Cause
There is an undervoltage at the
vehicle battery.
The control unit is defective.
The cargo space sensor is
defective.
The evaporator sensor is
defective.
The pressure transducer is
defective.
Pressure temperature alarm,
bottom. The refrigerant pres-
sure in the refrigeration system
is too low.
Pressure temperature alarm,
top
Result/measure
The charging voltage of the battery is
not sufficient or the voltage for the igni-
tion is not sufficient:
➤ Switch unnecessary consumer units
off, such as the mirror or front wind-
shield heating, etc.
If the fault remains:
➤ Turn off the refrigeration system.
➤ Contact your service partner.
➤ Turn off the refrigeration system.
➤ Contact your service partner.
➤ Turn off the refrigeration system.
➤ Contact your service partner.
➤ Turn off the refrigeration system.
➤ Contact your service partner.
➤ Turn off the refrigeration system.
➤ Contact your service partner.
The outside temperature is too low:
➤ Acknowledge the acoustic warning
signal with the button.
➤ The refrigeration system switches
back on automatically as soon as the
outside temperature > 0 °C and the
actual temperature in the cargo
space is higher than the set tempera-
ture.
There is not sufficient refrigerant in the
system:
➤ Turn off the refrigeration system.
➤ Contact your service partner.
The outside temperature is lower than
the set value:
➤ Close the cargo space doors.
or
➤ Operate the refrigeration system
when the outside temperature is
> 0 °C.
If the fault remains:
➤ Turn off the refrigeration system.
➤ Contact your service partner.
Frigo DC
EN