Solinst 464 Troubleshooting

Symptom: No air discharge from Control Unit:

Test Solenoid Switch Function

Follow the steps below, and answer the questions to determine
if your Solenoid Switch is functioning properly:
Manual
Control
Valve
Air Out
Air In
Regulator
Front of the Model 464 Faceplate
1. With an air source connected to the Control Unit, and a
flow rate selected and running, can you hear the 'clicking'
sound of the Solenoid switching with every drive and vent
cycle?
2. Using the Regulator, adjust the pressure (0 to 100 psi).
Does the Pressure Gauge respond with the change?
3. Connect an open fitting to the Air Out connection. Push the
Manual Control Valve. Air should discharge out through the
open fitting.
4. No air discharge means that the solenoid is blocked and not
functioning, contact Solinst.

Symptom: Hear an air discharge from below the faceplate:

Check for Leaks

Note: The Blow off Valve of the 125 psi Control Unit is
activated at ~150 psi, and the 250 psi Control Unit
at ~315 psi. When activated, the Blow off Valves
discharge into the open box area as a burst of air - this
is normal. The Regulator of both types of units may
hiss - this is normal.
1. Disconnect the air supply. Remove the four 3/32" hex
screws on the sides of the Control Unit holding the faceplate,
and flip for access to the components.
(Page 1 of 2)
Electronic Pump Control Unit Troubleshooting
Pressure Gauge
High Quality Groundwater and Surface Water Monitoring Instrumentation
Solenoid Switch
Blow Off Valve
Back of the 125 psi 464 Faceplate
Check all Tubing
Connections for Leaks
Back of the 250 psi 464 Faceplate (after September 2013)
2. Ensure a good physical connection of the air line from the
Manual Control Valve to the Solenoid Switch (see photos
above). The air lines simply push into the fitting to make the
airtight connection.
3. Reconnect the air supply and adjust the Regulator to
100 psi. Do you hear/see any air leaks?
4. If you still hear an air discharge from the back of the
faceplate, contact Solinst.
Model 464
Check all Tubing
Connections for Leaks
Solenoid Switch Blow Off Valve
Continued overleaf...