12 Volt DC Motor-Driven Diaphragm Pumps
Operation Precautions
1. Do not operate pump in an explosive environment.
Arcing from the motor brushes, switch or excessive heat from an improperly cycled motor may cause an explosion.
2.
3
Do not assume fluid compatibility. If the fluid is improperly matched to the pumps’ elastomers, a leak may occur.
Do not pump gasoline or other flammable liquids.
4. Intermittent duty is defined as operation and/or frequent starting within a period of time that would cause the motor to
reach its maximum thermal limits.
Once the maximum is obtained, the motor must be allowed to return to ambient temperature before resuming operation.
Troubleshooting Guide
Problem/Causes and Remedies
Pump will not Start
Check:
• Correct voltage (
+
10%) and electrical connections
• Fuse or breaker
• Pressure switch operation and correct voltage at
switch
• Rectifier or motor for open or grounded circuit
• Locked drive assembly
Pump will not Prime (No discharge with motor running)
Check:
• Debris in strainer
• Restriction (kinks) in inlet/outlet tubes
• Debris or swelling in inlet/outlet valves
Pump will not Shut Off (Output line closed and no leaks)
Check:
• Air trapped in outlet line or pump head
• Correct voltage to pump
• Debris in pump inlet/outlet valves
• Loose drive assembly or pump head screws
• Pressure switch operations/adjustments
Leaks from Pump Head or Switch
Check:
• Loose screws at switch or pump head
• Switch diaphragm ruptured or pinched
• Punctured diaphragm if fluid is present
* Important return safety instructions:
When you return your pump for warranty or repair,
you must always do the following:
1. Flush chemical residue from the pump
(best done in the field).
2.
Tag pump with type of chemicals having been sprayed.
3. Include complete description of operation problem,
such as how pump was used, symptoms of
malfunction, etc.
Since pumps can contain residues of toxic chemicals
these steps are necessary to protect all the people
who handle return shipments, and to help pinpoint the
reason for the breakdown.
PRECISION SPRAY EQUIPMENT, a divison of Green Leaf, Inc. 9490 N BALDWIN ST FONTANET, IN 47851 www.grnleafinc.com
a division of Green Leaf, Inc
®
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