User Guide

3534
• Check for any changes in the viscosity of
the chemicals being used. Increase the %
flow by adjusting the Flow Rate control to
a higher setting and run a Flow Rate test.
• Be sure that valves have been properly
installed in the pumphead.
Leakage at the connections:
• Be sure that the hose is fully seated and
hose connectors are tight.
• Be sure that valves are tight and o-rings
are in place.
Leakage around the pumphead:
• Be sure that the valves are tight and
o-rings are in place and the head screws
(hex bolts) are tight.
TROUBLESHOOTING GUIDE
Electrical
The pump does not operate when turned
ON:
• Check the power supply and connections.
Voltage should be between 100 - 130 VAC
for 115 V models and between 200 -
240 VAC for 220 V models.
• Check wiring color scheme. See Installa-
tion section on page 19 or call for techni-
cal assistance.
• Check fuse (BL7913 and BL7914).
Liquid
The pump operates but does not prime:
• Check for a clogged or loose filter on the
suction valve assembly. Retighten if
necessary.
• Check to see if the pump is too high
above the foot valve assembly (HI 721005)
in the feed tank. This vertical distance
should not exceed 1.5 meters (5 feet).
Either lower the pump or raise the feed
tank.
• Check the pumphead, suction and
discharge valves for blockage.
Pump flow rate is reduced:
• Check the pumphead, discharge and in-
jection valve assembly for any clogging.
Clean and reassemble.
• Check for any additional back pressure
created since the last flow rate was con-
ducted.