Instructions / Assembly

PST2/PSTF2 400 Maintenance
wc_tx000112_orig_gb.fm 31
3.7 Troubleshooting
Before ordering repairs, carefully read through this manual, then
repeat the inspection. If the problem remains, contact your nearest
dealer or Wacker Neuson representative.
Always turn off the power before inspecting the pump. Failure to
observe this precaution can result in serious accident.
Problem / Symptom Reason / Remedy
Pump will not start • Power is off. Restore power.
• Cable assembly is cut or not connected properly. Repair/
replace the cable or fix the connection.
• Impeller is clogged. Inspect the pump and remove any debris.
Pump stops soon after
starting
(Motor protector operates)
• Impeller is clogged. Remove debris.
• Low voltage. Provide the rated voltage, or make sure the cable
assembly extension is the proper standard.
• Wrong power frequency. Check the nameplate, and replace
the pump or the impeller.
• Extended operation with a clogged strainer. Remove debris
from the strainer.
Pump does not stop automatically • Float (if equipped) is obstructed, not moving freely, or malfunc-
tioning. Remove obstructions. Repair or replace float switch if
necessary.
• Water level of float (if equipped) set lower than pump’s mini-
mum operating water level. Set float higher than pump’s mini-
mum operating water level.
• Malfunction in level relay unit. Repair or replace level relay unit.
• Electrode shorted by debris. Use sandpaper to remove debris
from electrode.
• Electrical interference in vicinity of pump. Check for tangled
wires around electrode. Check for nearby electrical devices that
could generate electromagnetic interference; relocate pump if
necessary.
Poor lift or discharge
capacity
• Faulty motor. Repair or replace the motor.
• Excessive sand is discharged. Place the pump on a block or
other base to prevent the sand from being sucked into it.
• Worn out impeller. Replace.
• Sharply bent or clogged hose. Straighten out any sharp bends.
Enclose the pump with a screen to keep away debris.
• Strainer clogged or buried. Remove debris from the strainer, or
place a block under the pump.
Heavy vibration or noise • Damaged motor shaft. Contact dealer and replace motor.
WARNING