Robinair RG3000 Refrigerant Recovery Machine - Manual (Page 10)

10
t
roubleShooting
Symptom Possible Cause Possible Solution
Unit will not turn on 1. Power cord not plugged in.
2. Bad power outlet.
3. Unit is in high-pressure shut-off.
4. Motor is in thermal overload.
5. Blown or bad fuse.
1. Check power cord at wall and unit.
2. Try a different outlet.
3. Reduce head pressure to below
400 psi (27.6 bar).
4. Allow motor / unit to cool down.
5. Check / replace fuse.
Compressor tries to
start, but just buzzes
1. Low voltage at power source.
2. Extension cord too long, or too
small.
1. Locate / use better outlet.
2. Reduce length of extension cord.
Increase size (gauge) of extension
cord (14 AWG minimum).
Unit pumps into
high-pressure shut-off
1. Output valve on unit is closed.
2. Recovery cylinder valve closed.
3. Head pressure too high.
1. Check output valve.
2. Check recovery cylinder valve.
3. Check output hoses for restrictions
or kinks. Reduce head pressure.
Slow recovery 1. Trapped liquid in system.
2. Restriction in refrigerant flow path.
1. Momentarily cycle system compressor
to move trapped refrigerant.
2. Check inlet hose for restrictions or
kinks. Remove Schrader valves and
core depressers from hoses (if
possible). Use larger hoses.
Blown fuse 1. Electrical short in wiring.
2. Mechanical binding.
1. Check for and replace damaged
wires and / or electrical connectors.
2. Repair or replace compressor.
WARNING: TO PREVENT PERSONAL INJURY AND / OR EQUIPMENT DAMAGE,
ALLOW ONLY QUALIFIED PERSONNEL TO OPERATE AND REPAIR THIS UNIT. Before operating
or repairing the unit, read and follow instructions and warnings in this manual. The technician
must be familiar with air conditioning and refrigeration systems, refrigerants, and the dangers
of pressurized components. If the technician cannot read this manual, operating instructions
and safety precautions must be read and discussed in the technician’s native language.