TROUBLESHOOTING CALIBRATION ISSUES
This message indicates that the sensor was not
able to calibrate within 1” of zero. The hose
MUST be disconnected from the sensor in order
for the sensor to properly zero.
A reading of 20 to 30 psi while trying to zero the sensor is usually indicative of
water in the sensor body. Disconnect the hose from the sensor and allow 24 to 36
hours for it to dry. Connect the hose to the sensor FIRST, then to the pump, to air-
lock the hose and prevent water form entering the sensor.
DO NOT attempt to dry the sensor by inserting foreign objects into the tube, you
will damage the sensitive diaphragm inside. If the sensor will not zero after 36 hours
open to atmosphere, call our Technical Department for assistance.
This message will be displayed if the SR500 did
not register a difference of 1” or greater between
the Stopped vacuum level and the Running vacu-
um level. Several scenarios can cause this error:
1 The pump was not fully primed when the Prime Pump function was ended,
resulting in less than 1” Delta-P.
2 The hose is connected to the pressure side of the pump. If the screen reading
roughly matches your filter tank pressure, this means you are sensing the pres-
sure side of the pump. See Fig. X - Hose Mounting.
It is possible for an unseen check valve (or a pre-existing obstruction in a suction
line) to cause residual vacuum to remain in a line after the pump shuts off. If your
vacuum does not drop significantly while “please wait” is displayed after ending the
Prime Pump function, there may be a check valve in the line underground
ON/RUN MODES for
SR500 rev. 1.10
Pushing the “on/run” button scrolls through three possible run modes:
1 push = Timed mode. The SR500 will run the timed cycle set in setup mode
2 pushes = Continuous mode. The SR500 will run the pump 24hours/7days.
3 pushes = Remote mode. The SR500 will only operate by closing the remote sw
input circuit.
CANNOT SET ZERO!
SET TO CONTINUE
DELTA-P TOO LOW!
SET TO TRY AGAIN
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