s05mdl1sm-REV0708
Model S05 Metallic Page 10
TROUBLESHOOTING
Possible Symptoms:
•
Pump will not cycle.
•
Pump cycles, but produces no fl ow.
•
Pump cycles, but fl ow rate is
unsatisfactory.
•
Pump cycle seems unbalanced.
•
Pump cycle seems to produce
excessive vibration.
What to Check:
Excessive suction lift
in system.
Corrective Action:
For lifts exceeding
20 feet (6 meters), fi lling the pumping
chambers with liquid will prime the
pump in most cases.
What to Check:
Excessive flooded
suction in system.
Corrective Action:
For flooded
conditions exceeding 10 feet (3
meters) of liquid, install a back pressure
device.
What to Check:
System head exceeds
air supply pressure.
Corrective Action:
Increase the
inlet air pressure to the pump. Most
diaphragm pumps are designed for 1:1
pressure ratio at zero fl ow.
What to Check:
Air supply pressure or
volume exceeds system head.
Corrective Action:
Decrease inlet
air pressure and volume to the
pump as calculated on the published
PERFORMANCE CURVE. Pump is
cavitating the fl uid by fast cycling.
What to Check:
Undersized suction
line.
Corrective Action:
Meet or exceed
pump connection recommendations
s h o w n o n t h e D I M E N S I O N A L
DRAWING.
W h a t t o C h e ck :
R e s t r i c t e d o r
undersized air line.
Corrective Action:
Install a larger
air line and connection. Refer to air
inlet recommendations shown in your
pump’s SERVICE MANUAL.
What to Check:
Check ESADS+Plus,
t h e E x t e r n a l l y S e r v i c e a bl e A i r
Distribution System of the pump.
Corrective Action:
Disassemble and
inspect the main air distribution valve,
pilot valve and pilot valve actuators.
Refer to the parts drawing and air valve
section of the SERVICE MANUAL.
Check for clogged discharge or closed
valve before reassembly.
What to Check:
Rigid pipe connections
to pump.
Corrective Action:
Install flexible
connectors and a Warren Rupp surge
dampener.
What to Check:
Blocked air exhaust
muffl er.
Corrective Action:
Remove muffl er
screen, clean or de-ice and reinstall.
Refer to the Air Exhaust section of your
pump SERVICE MANUAL.
What to Check:
Pumped fl uid in air
exhaust muffl er.
Corrective Action:
Disassemble
pump chambers. Inspect for diaphragm
rupture or loose diaphragm plate
assembly. Refer to the Diaphragm
Replacement section of your pump
SERVICE MANUAL.
What to Check:
Suction side air
leakage or air in product.
Corrective Action:
Visually inspect
all suction side gaskets and pipe
connections.
What to Check:
Obstructed check
valve.
Corrective Action:
Disassemble the
wet end of the pump and manually
dislodge obstruction in the check valve
pocket. Refer to the Check Valve section
of the pump SERVICE MANUAL for
disassembly instructions.
What to Check:
Worn or misaligned
check valve or check valve seat.
Corrective Action:
Inspect check
valves and seats for wear and proper
seating. Replace if necessary. Refer
to Check Valve section of the pump
SERVICE MANUAL for disassembly
instructions.
What to Check:
Blocked suction line.
Corrective Action:
Remove or fl ush
obstruction. Check and clear all suction
screens and strainers.
What to Check:
Blocked discharge
line.
C o r r e c t i v e A c t i o n :
C h e ck fo r
obstruction or closed discharge line
valves.
What to Check:
Blocked pumping
chamber.
Corrective Action:
Disassemble and
inspect the wetted chambers of the
pump. Remove or fl ush any obstructions.
Refer to the pump SERVICE MANUAL
for disassembly instructions.
What to Check:
Entrained air or
vapor lock in one or both pumping
chambers.
Corrective Action:
Purge chambers
through tapped chamber vent plugs.
PURGING THE CHAMBERS OF AIR
CAN BE DANGEROUS! Contact the
Warren Rupp Technical Services Group
before performing this procedure. A
model with top-ported discharge will
reduce or eliminate problems with
entrained air.
If your pump continues to perform
below your expectations, contact your
local Warren Rupp Distributor or factory
Technical Services Group for a service
evaluation.
WARRANTY
Refer to the enclosed Warren Rupp
Warranty Card.
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