Troubleshooting Guide

9013DB0701 Preventive Maintenance and Troubleshooting Guidelines for Class 9013F and 9013G Pressure Switches
12/2007 Troubleshooting
© 2007 Schneider Electric All Rights Reserved
5
Pump cycles
each time water
is used
Tank waterlogged
For pre-charged tanks, check the bladder or air valve for leaks and
check tank pressure. If it is below cut-in pressure setting, complete
Steps 1–5 of “Providing Routine Maintenance” on page 1.
Drain some air from the compressed air valve stem. If water comes out,
the bladder is leaking. Completely drain the bladder and recharge with
air as required. Complete the remaining steps under “Providing Routine
Maintenance” on page 1.
1. Replace or repair the pressure tank.
2. For conventional tanks, check air
volume control for proper operation.
Drain and recharge tank. Clean or
replace any faulty parts.
Pressure switch
chattering
(contact chatter
or bounce)
Incorrect air pressure in the
bladder
Adjust the air pressure in the bladder to manufacturer's specification.
See the procedures for waterlogged tank.
For conventional tanks, check the air
volume control for proper operation.
Drain and recharge tank. Clean or
replace any faulty parts.
Excessive vibration
The pressure switch may be mounted on rigid pipe and secured by
brackets to the structure. If the pump is also tightly secured, vibration
may be amplified.
Mount the pressure switch to a less rigid
pipe, and shock mount any brackets.
Isolate the switch from other sources of vibration by shock mounting.
Pump shuts off
immediately after
startup
High pressure pump or a
new pump
Add a surge reducer. Order 1530S6G1 for a bag of 50.
Long pump run,
or pump will not
shut off
Too many water outlets
Limit the number of devices running at any one time. —
Increase the size of the pump and/or storage tank Replace the components as desired
Worn pump parts —
Check the pump for worn impellers,
casing, or other close fitting parts.
Water leaks
Check for leaks in service lines. Repair the leaks as required
Plugged discharge pipes
Check for plugged discharge pipes
resulting in reduced flow. Replace the
damaged pipes or repair the leaks.
Switch contacts
burn up
Pump electrical rating is
too high
—
Ensure that the electrical rating of the
switch corresponds to the pump’s
electrical rating.
Add a contactor.
The switch may be replaced by one with
heavy duty contacts.
Switch will not
trip (cut-in/cut-
out) at desired
pressure
Incorrect pressure settings
Adjust to correct pressure settings. See procedures for waterlogged
tank on page 4.
—
Defective pressure gauge Test the pressure gauge. Replace the pressure gauge.
Damaged diaphragm
actuator
— Replace the diaphragm.
Cannot adjust
switch to desired
pressure
Settings outside the
pressure range limits of the
switch
—
Replace the switch with one that has
the correct range and differential
Table 2: Troubleshooting Tips (continued)
Condition Possible Causes Description/Corrective Action
Corrective Procedure for
Qualified Service Personnel