Problem Solving A Solar System; Testing The Solar System - Pentair Pool and Spa Control System SunTouch Installation And User Manual

Problem Solving a Solar System

SunTouch solar is not operating
Verify the circuit breaker at sub-panel is not tripped. If the 3 AMP Circuit Breaker on the on SunTouch is
tripped, it is most often due to a defective Circuit Board or Valve Actuator. Try disconnecting each one
separately to determine which one is at fault.
Solar will only operate when the solar temperature is 5° warmer than the water temperature.
Inspect the appropriate sensor cable and wire connections and replace the appropriate temperature sensor if
necessary. An ohm meter can be used to take a reading of the sensors. See table on page 68.
If the temperature sensors are not at fault, replace the SunTouch circuit board.
Water flow to panels switch does not operate the valve actuator
If the valve actuator does not operate when using the WATER FLOW TO PANELS Switch (sliding switch
between ON and OFF), either the valve actuator or the SunTouch circuit board is at fault.
First verify that the toggle switch located on the valve actuator is either in the ON1 or ON2 position.
With a voltmeter, check the output voltage of the VLV1 socket located on the SunTouch circuit board. When
the WATER FLOW TO PANELS Switch is in the OFF position, the top and middle pins should read 24 VAC.
When the WATER FLOW TO PANELS switch is in the ON position, the top and bottom pins should read
24 VAC.
If voltage readings are correct, replace the valve actuator. If voltage readings are incorrect, replace the
SunTouch circuit board.
Checking The Temperature Sensors
Disconnect temperature Sensor wires from the SunTouch circuit board, and test sensor using an ohm meter.
See table on page 68.

Testing the Solar System

To test the SunTouch in "SOLAR ONLY" mode: Set the "System Control" menu setting to "SOLAR ON"
verify the valve(s) are in the solar position. Then set the menu setting to "SOLAR OFF" and verify the valve is
in the normal recirculating pool position. If the valve(s) positions are working in reverse, toggle the valve
switches and test again.
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