Pump Solutions Group Neptune Solenoid-driven Diaphragm Metering Pump ARPZ-31_61_12 - Manual (Page 39)

38
Tr
oub
leshooting
Trouble Cause Remedy
The pump
runs, but
no liquid is
pumped. Air has
found its
way inside. (1) A liquid which easily vaporize is being used.
(2) Air has entered from a joint or seal to
become mixed with the liquid.
(3) The tank is empty.
(1) Dilute the liquid.
(2) Tighten the parts from which the liquid is leaking.
(3) After replenishing the liquid, proceed with
air releasing.
No liquid is
sucked in. (1) The strainer is clogged.
(2) The pump is gas-locked.
(3) The valve seat area has been assembled
the wrong way round.
(1) Clean the strainer and the tank.
(2) Proceed with air releasing.
(3) Disassemble the valve seat area, and then
re-assemble it properly.
The pressure
fails to rise. (1) The supply voltage is low or the power
supply used is not a commercial one.
(1) Connect the pump to the proper power
supply.
No liquid is
discharged. (1) The viscosity of the liquid is too high.
(2) The pressure loss (pipe resistance) is too
high.
(1) Reduce the viscosity of the liquid.
(2) Install an air chamber at the discharge
side, or use a pipe with a larger diameter.
Liquid is leaking. (1) The pressure is increased due to clogging by dirt, etc.
(2) Damage has resulted from fatigue of the
pipes, diaphragm or other parts.
(3) The nuts have not been adequately tightened.
(1) Disassemble and clean.
(2) Replace the defective parts with new parts.
(3) Tighten the nuts.
Liquid is coming
out of the relief/air-
release port. (1) The relief valve was not replaced after it was activated.
(2) Abnormal pressure has been generated. (1) Replace the relief valve.
(2) Remove the cause of the abnormal pres-
sure, and replace the relief valve.
The pump
fails to run. The pilot
lamp does
not blink. (1) Something is wrong with the power supply
or supply voltage.
(2) The wiring connections for the pump were
not performed correctly.
(3) The power cable is broken.
(4) The main power switch is off.
(5) The circuit breaker (CB) has been tripped.
(6) The built-in protective fuse has blown.
(1) Check the power supply and supply voltage, and
connect the pump to the correct power supply.
(2) Check the wiring connections, and connect
the wires correctly.
(3) Repair or replace the power cable.
(4) Turn on the main power switch.
(5) After investigating the cause, reset the cir-
cuit breaker (CB).
(6) Ask manufacturer for repair.
The solenoid
fails to work. (1) The ground fault circuit interrupter (GFCI)
has been tripped.
(2) The electromagnetic contactor (MC) is defective.
(1) Ask manufacturer for repair.
(2) Replace the electromagnetic contactor (MC).
There is a significant
difference in the set dis-
charge volume and the
actual discharge volume. (1) The discharge-volume setting is not correct.
(2) The pipe connection conditions are differ-
ent from the ones that were used to obtain
the actually measured value.
(1) Set the correct value.
(2) Conduct the measurements again under
actual conditions, and then set the dis-
charge volume accordingly.
Troubleshooting
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