Graco Dyna-Star HP 77X202 Instructions Manual page 21

Problem
Low level alarm did not come on but
pump cavitates (runs out of grease).
or
Pressure is not building in the system
and a "no pressure" error is initiated
Low level alarm is activated and
continuous but the reservoir is filled
with grease
3A3956D
Cause
Low level sensor malfunction
Pressure switch malfunction
Low pressure or no pressure in the
system
Low level sensor malfunction
Troubleshooting
Solution
Check sensor LED. If green, tank has
grease but pump is not able to pump
grease. See Troubleshooting instruc-
tions in pump manual 332514.
Check sensor LED. If amber, tank
has no grease. check wiring between
sensor and alarm.
Check sensor LED. If there is no
light, check sensor wiring to verify
there is power to the sensor.
Check pressure switch wiring
Check piping for leaks. If a leak is
detected, repair or replace piping.
Check injectors for leaks. If a leak is
detected repair or replace injectors.
Check sensor wiring.
21