Robinair AC375C Refrigerant Recovery, Recycle, Recharge Unit - Manual (Page 17)

Recover/Recycle/Recharge Unit
15
Operation
l During operation, any of the following messages may appear on the
display screen. If a message appears, immediately take the appropriate
action.
CHANGE FILTER — This message appears after every 68.0 kg (150 lbs.)
of refrigerant has been recovered, indicating that the filter-drier needs to
be replaced. Refer to Replacing the Filter-Drier in the “Maintenance”
section of this manual. NOTE: To avoid service delays, keep extra filter-
driers on hand.
CHANGE OIL — This message appears after every 10 hours of vacuum
pump use. Refer to Changing the Vacuum Pump Oil in the “Mainte-
nance” section of this manual.
DRAIN OIL — This message appears after recovering refrigerant from
an A/C system. For more information, refer to Draining the A/C System
Oil in this “Operation” section of this manual.
HIGH PRESSURE — This message appears if the internal storage ves-
sel’s pressure rises to 25 bar (365 psig) or higher. Let the unit cool down
for 30 minutes. Then press the Menu key (
) and the Up arrow key to
clear the message from the display screen. If the message does not
clear, contact a manufacturer-authorized service technician.
OVERLOAD — This message appears if the weight of the internal
storage vessel reaches 21.3 kg (47 lbs.), or if the unit’s weight scale is
damaged, disconnected, or out of calibration. Immediately remove
refrigerant from the internal storage vessel. Then press the Menu key (
)
and the Up arrow key to clear the message from the display screen. If the
message does not clear, contact a manufacturer authorized service
technician.
PRESSURE EXISTS — This message appears if there is pressure in the
hoses when the vacuum cycle is started, and is designed to protect the
vacuum pump from damage due to over pressurization. If this happens,
you must recover before the vacuum operation is started.
SLOW CHARGE — This message appears if the unit cannot charge
.05 lbs. in 30 seconds. It may be necessary to use the vehicle to pull the
refrigerant in. Refer to the Slow Charge procedure in this “Operation”
section of this manual.
Operating Guidelines contd.