Troubleshooting - Graco Dyna-Star HP 77X202 Instructions Manual

Troubleshooting

Troubleshooting
Problem
Pump (B) is not running; i.e., not
cycling, there is no lubricant output,
pump runs slow, the control board's
red LED fault is illuminated, etc.
Lubricant is leaking from pressure
relief.
Lubricant coming out of breather (J). Reservoir (K) overfilled because
Refilling pump (P) slows down or
stalls and no output at the fill valve
(Z).
Refilling pump (P) runs continuously
but does not stall.
20
Cause
Pump (B) malfunction.
Blockage in the line.
Pressure switch not actuated/mal-
functioning.
Pressure switch set too high.
Auto-Fill Shut Off (S) did not shut the
refilling line (D).
Auto-Fill Shut Off Valve (S) has not
reset
Leakage in the system
Reservoir (K) overfilled because
Auto-Fill Shut Off (S) did not close
the refill line.
Solution
Refer to the pump manual 332514.
Check for blockage in the line. Clear
blockage.
Check switch wiring
Replace pressure switch
Reduce system pressure
Replace the Auto-Fill Shut Off dia-
phragm (5b) and Auto-Fill Shut Off
valve (5a). Refer to manual 332518.
Relieve all refilling line (AA) pres-
sure. see page 14.
Make sure Auto-Fill Shut Off (S) pin
is down. See F . 17, page 17.
IG
Inspect the refilling line (V) and cor-
rect any leaks.
Replace the Auto-Fill Shut Off dia-
phragm (5b) and Auto-Fill Shut Off
Valve (5a). Refer to manual 332518.
3A3956D