tekmar 667 Snow Detector & Melting Control - Manual (Page 23)

23 of 28 © 2002 D 667 - 09/02
The Snow Detector & Melting Control 667 has a built-in test routine which is used to test
the main control functions. The 667 continually monitors the sensors and displays an error
message whenever a fault is found. See the following pages for a list of the 667’s error mes-
sages and possible causes. When the Test button is pressed, the test light is turned on. The
individual outputs and relays are tested in the following test sequence.
Testing the Control
TEST SEQUENCE
Each step in the test sequence lasts 10 seconds.
During the test routine, the test sequence is paused by pressing the Test button. While paused, the control displays the testing
step as well as the word PAUS. If the Test button is not pressed again for 5 minutes while the test sequence is paused, the control
exits the entire test routine. If the test sequence is paused, the Test button can be pressed again to advance to the next step. This
can also be used to rapidly advance through the test sequence. To reach the desired step, repeatedly press and release the Test
button until the appropriate device and segment in the display turn on.
Step 1 The injection pump is ramped up over 10 seconds.
Step 2 The injection pump is ramped down over 10 seconds.
Step 3 The System Pmp 2 contact is turned on for 10 seconds. After 10 seconds, the System Pmp 2 contact is turned off.
Step 4 The system pump contact (Sys P1) is turned on for 10 seconds.
Step 5 The Boiler contact is turned on for 10 seconds. After 10 seconds, the Boiler contact and Sys P1 contacts are shut off.
Step 6 The Melting relay is turned on for 10 seconds.
MAX HEAT
The Snow Detector & Melting Control 667 has a function called MAX HEAT. In this mode, the 667 turns on and operates the system
up to the maximum set temperatures, and the mixing device at the set percentage. The control continues to operate in this mode
for up to 24 hours or until either the Item, Menu or Test button is pressed. This mode may be used for running all circulators during
system start-up in order to purge air from the piping. To enable the MAX HEAT feature, use the following procedure.
1) Press and hold the Test button for more than 3 seconds. At this point, the control dis-
plays the words MAX HEAT and the word NO.
2) Using the ▲ or ▼ buttons, select the word YES. After 3 seconds, the control flashes
the word MANUAL and the number 100. This number represents the desired output
from the mixing device.
3) Set the desired output of the mixing device by using the
▲ and / or ▼ buttons on the
control.
4) To cancel the MAX HEAT mode, press either the Item, Menu, or Test button.
5) Once the MAX HEAT mode has either ended or is cancelled, the control resumes
normal operation.
Menu Item
Menu Item or