1. Troubleshooting
Caution
Before working on the pump, disconnect the power cord,
depressurize the discharge tubing and drain or flush any
residual liquid from the pump head and valves.
Problem
Possible Cause
Corrective Action
Faulty wiring
Correct wiring
Improper voltage
Connect to proper voltage source
Pump does not start
Electronic control unit is damaged
Replace control unit
Pump stroke length is too short
Operate pump with stroke length set at
100% until primed. Then set stroke
length as needed to obtain desired
output.
Air in suction tubing
Reroute suction tubing to eliminate air
trap
Valve gasket is missing
Install valve gasket
Valve set assembly direction is
wrong.
Reassemble valve set
Pump is air locked
Prime pump per instructions
Suction or discharge valve is
clogged with foreign matter
Disassemble, inspect, clean
Pump does not
prime
Ball stuck to valve seat
Disassemble, inspect, clean
Suction or discharge valve is
clogged with foreign matter
Disassemble, inspect, clean
Air is trapped in pump
Prime pump per instructions
Overfeeding
Install injection valve or back
pressure valve
Diaphragm is damaged
Replace diaphragm
Output fluctuates
Worn check valves
Replace valve cartridges
Liquid leaks
Fitting or coupling nut is loose
Tighten
Pump head is loose
Tighten pump head bolts
Torque: 2.6 N.m
Diaphragm is damaged
Replace diaphragm
O-ring or valve gasket missing
Install o-ring or valve gasket
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Summary of Contents for EH-E
Page 12: ...5 Dimensions Material symbol VC V6 PC VM FC 10...
Page 13: ...5 Dimensions Material symbol VC V6 PC VM FC 11...
Page 14: ...5 Dimensions Material symbol SH 12...
Page 15: ...5 Dimensions Material symbol SH 13...
Page 33: ...5 Names of Part and Structure 1 Pump Head Unit Material symbol VC V6 PC P6 VM FC 31...
Page 34: ...5 Names of Part and Structure 2 Pump Head Unit Material symbol SH E30 E35 E45 32...
Page 35: ...5 Names of Part and Structure 3 Pump Head Unit Material symbol SH E55 33...
