Pentair MYERS Quick Prime QP50B Instructions De Fonctionnement page 9

TROUBLESHOOTING
PROBLEM
No water delivered
Not enough water or pressure
Pump loses prime after starting
Motor overheats
Pump vibrates or is noisy
CHECKING PROCEDURE
1. Pump not properly primed. (See
Priming Instructions.)
2. Discharge system head too great; in
this a pressure gauge at the pump
3. Suction lift too great; check with
vacuum gauge. (See Suction Piping.)
Check or foot valve, if used, may be
completely plugged or suction piping
may be completely plugged.
4. Air leak in suction piping.
1. Air leak in suction piping.
2. Motor not up to speed; check for
incorrect voltage or low voltage. (See
Motor Voltage.)
3. Discharge system head too great.
4. Impeller, suction pipe, check or foot
valve partially plugged.
5. Wrong motor rotation. (See Motor
Rotation.)
6. Suction lift too great. (See Suction
Piping.)
1. Air leak in suction piping.
2. Total suction lift too great. (See
Sucion Piping.)
1. Check rotating element to insure that
it turns freely.
2. Low voltage at the motor. (See Motor
Voltage and Motor Wiring.) Check
electrical connections to insure tight
contact.
1. Insufficient pump foundation.
2. Excessive total suction lift.
9
5. Wrong motor rotation. (See Motor
Rotation.)
6. Shaft seal leaking under priming
conditions.
7. Motor not up to speed; check for
incorrect voltage. (See Motor Voltage.)
8. Plugged impeller.
7. Insufficient submergence of suction
pipe. (Suction pipe inlet should be at
least 3 feet below the liquid surface at
all times.)
8. Pump too small for installation in-
volved. (Check Rating Table.)
9. Suction piping too small causing
excessive total suction lift.
10. Air or gas entrained in liquid.
11. Worn impeller or diffuser.
3. Insufficient submergence of suction
pipe; check pumping water level. (The
suction pipe inlet should be at least
3 feet below the liquid surface at all
times.)
3. Poor ventilation. (See Location.)
3. Bent shaft or worn motor bearings.
4. Impeller partially clogged.