Troubleshooting
16
3A6917A
Troubleshooting
NOTE:
Check all possible remedies before
disassembling the pump.
NOTE:
The status indicator (L) on the driver will blink if
an error is detected.
Problem
Cause
Solution
Pump output low on both
strokes
Exhausted fluid supply
Refill and prime the pump.
* Clogged fluid outlet line,
gun, etc. The hose inner
diameter is too small
Clear the hose, outlet check valve, or gun; use the hose
with the larger inner diameter.
Worn piston packing
Replace the piston packing. See your pump lower manual.
No output
Improperly installed intake
or piston check valves
Check and repair. See pump the lower manual.
The intake valve is clogged. Clean the intake valve.
Exhausted fluid supply
Refill and prime the pump.
Pump will not operate
Exhausted fluid supply
Refill and prime the pump.
* Clogged fluid hose or gun Clean the hose or gun.
Fluid dried on the piston rod Disassemble and clean the pump (see the lower manual).
In the future, stop the pump at the bottom of the stroke.
Keep the wet-cup filled with compatible solvent.
Driver parts are worn or
damaged
Repair or replace the driver. Remove the lower from the
driver. If the driver will not cycle and does not blink an error
code, then troubleshoot the driver or replace.
No pressure or flow
Fluid is leaking from the
rupture disk
Replace the rupture disk; do not replace with a pipe plug.
The intake valve is clogged Clean the intake valve.
Leaking drain valve
Close or replace the drain valve.
Driver does not turn on
Over voltage (over 300 V)
See power supply requirements in your driver manual.
No power to the control
board
Verify that the power supply is connected. Check the
junction box connections.
Output low on the down
stroke
Open or worn intake valve
Clear or service the intake valve.
Output low on the up
stroke
Open or worn piston valve
packings
Clear the piston valve. Replace the packings.
*
To determine if the fluid hose or gun is obstructed, follow the
on page 10. Disconnect
fluid hose and place a container at pump fluid outlet to catch any fluid. Turn pressure adjustment knob just enough
to start the pump. If the pump starts, the obstruction is in the fluid hose or gun.