PENTA Intelliboost MIB0715B Manuel D'utilisation page 11

Quick Troubleshooting Guide - Pump
Problem
Pump starts, no water
pumped
Pump performance
reduced
Pump performance
unstable
Pump reverses when
stopped
Pump cycles rapidly
Cause
No water to inlet
Outlet shutoff closed
Low inlet water
pressure
Set point low
Low suction pressure/
cavitation
Differential pressure in
pump too low
Check valve stuck open
Leaky suction pipe
Tank diaphragm is
damaged
Tank air pressure
incorrect
11
Fix
Check/repair water supply, open inlet
shutoff valve.
Open outlet shutoff.
Check/repair water supply, open inlet
shutoff valve.
Adjust set point.
Check/repair/clean out water supply, open
inlet shutoff valve. Repair any leaks in
suction pipe.
Gradually close discharge shutoff until
delivery pressure stabilizes and noise level
drops; DO NOT close completely.
Remove and clean/replace check valve.
Repair suction pipe.
Replace tank
Adjust tank air pressure to 70% of set point
pressure; see Table 2.