Graco Dyna-Star HP 77X202, Instructions Manual

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