12/06/99
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4.0 Troubleshooting
PUMP DOES NOT RUN
1. Check wiring diagram for proper connections. Confirm all electrical terminations are tight and
secure.
2. Check for proper voltage selector switch settings for your DC source input. If the incoming
voltage is less than the set-point voltage, the controller will not turn on.
3. On battery sources systems, make sure the batteries are at a full state of charge and that the
controller voltage selector switch is in the proper position for your nominal voltage input
configuration.
4. Check for proper controller input and output with a volt meter. A quick look at
the LED indicator lights will verify power coming from the DC source supply
going to the controller (red), power going from the controller to the pump
(green) and overcurrent shut down (yellow). If the red LED is on and the
green and yellow LED’s are not, make sure the system on/off switch is on, disconnect the remote
switch and electrode wires, if used, and turn switch #5 and #6 off. If the green LED is still not on,
disconnect the pump wires, L-and L+. If the green light does not turn on then check voltage on L-
and L+ with a volt meter to confirm no output voltage. THEN WHAT?
5. For additional pump test, connect a jumper wire across terminals PV- and
L-. This will bypass the controller and allow the pump to run directly from
the DC source. This step will confirm pump operation. If the DC source is a
solar array, the test must be conducted when full sunlight is available for a valid test.
RED AND GREEN LEDS ARE ON, YELLOW LED IS OFF AND THE PUMP
DOES NOT RUN
To verify power coming out of the controller, connect a DC voltmeter across L+
and L-. If 12 Volts or more is coming out then:
1. Check the splice above the pump for proper connections.
2. Check for broken wire leading to the pump.
Check for open motor winding. With an ohmmeter set on the R x 1 scale, check
between the two pump lead wires. The meter reading should be between .5 to
50 ohms. If the resistance is higher than this, disconnect the pump at the
splice above the pump and check again.
NO VOLTAGE AT THE L+ AND L- TERMINALS
Note: To bypass all remote switching circuits, disconnect all wires from the sensor interface
terminal block in the controller housing (the small terminal block) and switch program switches #5
and #6 to the OFF position.
1. Make sure the system ON/OFF switch is ON.
2. Check to see if the water level is above the top electrode when low water cut-off circuit is being
used.
3. Check to see if the float switch, if used, is functioning properly.
4. Check the controller for proper programming and adjustment. If the voltage setting on the
controller is higher than the incoming voltage, the controller will not turn on, (See controller
adjustment section)
