Refco ENVIRO-DUO Mode D'emploi page 16

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b. The connecting hose between the recovery unit and
refrigerant tank is stuck — close all the valves and replace
the connecting hose.
c. The temperature of the refrigerant tank is too high,
therefore, pressures is too high — give it some time to
cool down and the pressure will come back to normal.
d.
The unit has an Internal Low Pressure Shut-Off Switch
and delay circuit. If the pressure inside the system is below
-2.5 ~ -6.8 psi for 20 seconds, the unit will auto-matically
shut off and the Green Alarm Light will switch on.
When the unit completes recovery and purge oper-ation,
there is no pressure in the intake port. Therefore the unit
can only run for 20 seconds after restart.
When the input pressure is above 0.8 bar (11 psi), the
unit will run continuously.
e. This unit can be used together with a overfill level sensor.
Please connect the recovery unit and the tank with the
80% O.F.P. Cable (Item 1 in the PARTS DIAGRAM).
If the liquid refrigerant reaches 80% capacity of the tank,
the recovery unit will automatically shut off and the Red
Alarm Light will switch on (80% O.F.P. ALARM). Before
restart please replace tank.
f. If the refrigerant tank has no float level sensor, please
take the 80% O.F.P Cable off. Otherwise the recovery
unit can not start. In this case, an electric scale is required
to monitor the recovered refrigerant amount.
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Instruction Manual ENVIRO-DUO