Stinger Refrigerant Recovery Unit, User Manual

Page: 27 / 36

2090-0217 Rev 6 27
Troubleshooting
PROBLEM CAUSE ACTION
AC power switch is
ON, but fan, com-
pressor, and status
LED are all OFF Power cord not attached
No voltage at AC outlet
Circuit breaker has opened
Attach power cord.
Verify voltage at job site.
Identify cause of breaker
activation, rectify, and reset.
Status LED glows
red –Compressor
does not start or
stops running Optional 80% tank full shutoff
cord not connected to tank.
Tank is full and float switch
has opened.
Float switch in tank is open.
High pressure switch has
activated due to discharge
pressure exceeding 550 psi.
Compressor motor thermal
overload has tripped
Electronics failure in motor, or
on printed circuit board
Connect yellow STI cord to
tank. If tank does not have a
float switch, short cord and
use a scale.
Change tanks. To restart,
power unit off and on again.
Check tank switch with multi-
meter.
Reduce pressure: Check for
restrictions in discharge line
and that recovery tank valve
is open; rotate function valve
to PURGE and back to
RECOVER; check that outlet
valve is OPEN. To restart,
power unit off and on again.
Turn OFF unit and allow
motor to cool down for at
least 15 minutes.
Factory service required.
Status LED is OFF –
Fan is running, but
compressor is OFF Low pressure switch has
activated due to inlet port
reaching a vacuum of 13" Hg
during recovery process
Low pressure switch is still
activated even after inlet port
has been exposed to
atmospheric pressure
System evacuation is
complete.
Apply 1 – 2 psi pressure to
inlet port to reset low
pressure switch.