Robinair 34988 Recovery, Recycling, Recharging Unit - Manual (Page 22)

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Figure 11
Tank Fill Hose Filter Service
The black tank fill hose at the rear of the machine
contains a filter that can be cleaned when it
appears that refrigerant flow is restricted.
When the machine senses low flow, it may display
the following message:
• SOURCE TANK EMPTY, but yet you know the
source tank contains refrigerant, connections
are secure, and the source tank valve is open.
The cause may be that the tank fill hose filter is
plugged.
Cleaning the Tank Fill Hose Filter
1. First ensure that pressure does not exist in the
line. Disconnect the external source tank,
and perform a manual tank fill to capture any
refrigerant in the line.
2. Slowly and carefully disconnect the tank fill
hose from the adapter. There may still be a
little pressure in the line.
3. Disassemble the tank fill hose at the filter
housing as shown in Figure 11.
4. Remove and clean the filter.
5. After the filter has been installed back into the
filter housing, torque the housing assembly to
8.5 N•m (6 ft. lbs.).
Maintenance
Disassemble the filter housing.