tekmar 667 Snow Detector & Melting Control - Manual (Page 26)

© 2002 D 667 - 09/02 26 of 28
The control is no longer able to read the water detection circuit due to an open circuit. In this case, if
the control is currently in the Melting mode, the control will finish the snow melting cycle. The snow
melting system can only be operated using an external melt demand, Remote Display Module 040,
Remote Start / Stop Module 039 or the Start button on the control. Otherwise, the control will operate
as if the Snow / Ice Sensor 090 is dry. Check the 090 water detection circuit (black and blue wires, ter-
minals 4 & 5) according to the Data Brochure D 090. To clear the error message from the control after
the error has been repaired, press either the Menu or Item button.
667 Error Messages (3 of 3)
The control is reading a heater malfunction. In this case, unless the yellow sensor becomes too hot, the
heater continues to try to operate. The snow melting system can only be operated using an external
melt demand, Remote Display Module 040, Remote Start / Stop Module 039 or the Start button on the
control. Check the 090 heater circuit (red and black wires, terminals 3 & 4) according to the Data Bro-
chure D 090. Make sure the yellow and brown wires are not reversed. To clear the error message from
the control after the error has been repaired, press either the Menu or Item button.
The control’s internal sensor is too hot. (Above 160°F (71°C)) In this case, the control will turn off the
heater in the Snow / Ice Sensor 090 until the control cools off. To clear the error message from the
control after the error has been repaired, press either the Menu or Item button.
This warning message will be displayed if the SLAB temperature does not increase to the SLAB TRG
temperature while the system is melting within a set time. The time limit is set using the NO HEAT item
in the Monitor menu. To clear this warning, press either the Menu or Item button.
Error Displayed Description of Error