CPE C Series Manual - Página 16

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CPE C Series Manual

9. TROUBLESHOOTING

CPE Systems Inc.
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CPE pumps are relatively maintenance-free with the exception of sanitizing and seal
replacement. However, like any piece of machinery occasional problems can arise. This section
provides a means of determining and correcting most of your pump problems. The motor
manufacturer should be contacted for specific repair instructions on the motor. Table 4 and
Table 5 has been prepared on the basis that the pump is properly-suited to its application.
Should problems arise where the remedies listed in the following tables do not resolve them,
pump cavitation may be the problem. Symptoms of pump cavitation, such as noisy operation,
insufficient discharge, and vibration, can result when a pump is not properly applied. If these
conditions are present, check the system and re-evaluate the application. If assistance is
required, contact CPE Systems.

9.1 Pumping

Table 4: Pump Troubleshooting
Problem
Probable Cause
1. No Discharge
a. Pump speed too low
b. Wrong direction of rotation
c. Closed valve; obstruction in
discharge piping
2. Insufficient
a. Pump speed too low
Discharge
b. Wrong direction of rotation
c. Valve partially closed; obstruction
in discharge piping
d. Impeller damaged
3. Excessive Power
a. Motor speed too high
Consumption
b. Impeller is binding
c. Motor shaft is bent or worn
4. Pump Is Noisy
a. Magnetic hum in motor
b. Motor Bearings are worn
c. Foreign matter is rotating with
impeller
d. Impeller is binding
e. Cavitation
5. Excessive
a. Pump is not leveled properly
Vibration
b. Impeller is damaged
c. Piping is not supported
d. Cavitation
6. Pump Leaks
a. O-ring seal is worn or defective
b. Carbon seal is worn
c. Insufficient compression on seal
assembly
d. Damaged inlet or outlet
e. Backplate gasket is worn
f. Clamp is loose
www.cpesystems.com
Remedy
a. Correct wrong or poor electrical connections
b. Reverse a three-phase motor by switching any
two of the three power leads at the motor controller;
reverse a single phase motor per motor manufacturer's
instructions
c. Open gate valve; clear obstruction
a. See 1.a
b. See 1.b
c. See 1.c
d. Replace Impeller
a. Internal motor wiring is incorrect; replace motor
b. Relieve strain on casing replace defective impeller
c. Replace shaft
a. Consult motor manufacturer
b. Replace bearings
c. Remove casing and remove foreign matter
d. See 3.b
e. Improper sizing or piping, etc.
a. Level pump
b. Replace impeller
c. Support discharge and suction piping
d. Improper sizing or piping, etc.
a. Replace o-ring seal
b. Replace carbon seal
c. Replace spring
d. Replace casing
e. Replace gasket
f. Tighten clamp
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