W W W . S O L A R P O W E R . N E T . A U
Page 11 of 20
Revision: 9h Issued: 01 August 2008
Tighten the cable tie to ensure the sensor leads cannot come close to the 240V connections on the other
side of the board, even if loose.
This sensor must be connected for operation of the pump.
The LED light on the control board will flash twice per second indicating a Fault if this wire is not
connected and will cause the pump to not operate.
The status LED output provides a visual indication of the operating status of the controller:
LED mostly on - Idle, pump off **
1 short flash
- Pump running
2 short flashes
- Sensor fault, pump off
** As this LED output is shared with the communications output, when the LED is on continuously,
there will be a short blink every 2 seconds. This small perturbation lasts for approximately 31ms.
Temperature – Deg C
-5
0
5
25
40
60
80
100
110
Resistance - K Ohms
42.49 32.75 25.45
10
5.32
2.49
1.26 0.682 0.513
This chart outlines the resistance of temperature probes and may be used to check for correct operation
of the probes. See the controller manual for full details on controller operation.
NOTE: DO NOT run the sensor wire through the same hole in the roof material as the pipe
work, as this will lead to the cable being damaged from the pipe movement in the hole and will
cause short circuits or failure of the temperature sensing.
