tekmar 279 Steam Control - Manual (Page 22)

© 2010 D 279 - 05/10 22 of 24
E01 MEMORY ERROR
The E01 memory error message causes the Alert 1 High relay to turn on.
The control was unable to read a piece of information stored in its memory. Because of this,
the control was required to reload the factory settings into all of the items in the ADJUST menu.
The control continues operation using the factory defaults until all of the items in the ADJUST
menu of the control have been checked by the installer.
Note: The Installer/User switch must be set to Installer in order to clear the error.
OUTDOOR SENSOR SHORT CIRCUIT
The outdoor sensor short circuit error message causes the Alert 2 Low relay to turn on.
The control is no longer able to read the outdoor sensor due to a short circuit. In this case the
control assumes an outdoor temperature of 32°F (0°C) and continues operation. Locate and
repair the problem as described in the Data Brochure D 070. To clear the error message from
the control after the sensor has been repaired, press any button.
OUTDOOR SENSOR OPEN CIRCUIT
The outdoor sensor open circuit error message causes the Alert 2 Low relay to turn on.
The control is no longer able to read the outdoor sensor due to an open circuit. In this case
the control assumes an outdoor temperature of 32°F (0°C) and continues operation. Locate
and repair the problem as described in the Data Brochure D 070. To clear the error message
from the control after the sensor has been repaired, press any button.
CONDENSATE SENSOR SHORT CIRCUIT
The condensate sensor short circuit error message causes the Alert 2 Low relay to turn on.
The control is no longer able to read the condensate sensor due to a short circuit. In this case
the control operates as if the condensate sensor was not connected so that there is no time
allowed for establishing steam and no lockout differential. Locate and repair the problem as
described in the Data Brochure D 070. To clear the error message from the control after the
sensor has been repaired, press any button.
CONDENSATE SENSOR OPEN CIRCUIT
The condensate sensor open circuit error message causes the Alert 2 Low relay to turn on.
The control is no longer able to read the condensate sensor due to an open circuit. In this case
the control operates as if the condensate sensor was not connected so that there is no time
allowed for establishing steam and no lockout differential. Locate and repair the problem as
described in the Data Brochure D 070. To clear the error message from the control after the
sensor has been repaired, press any button.
If the condensate sensor was removed on purpose, set the Condensate/Off switch to Off.
Error Messages (1 of 2)
Document the control for future reference. Before making any adjustments to the control, note down
all of the items that the control is currently displaying. This includes items such as error messages,
current temperatures and settings, and which devices should be operating as indicated by the LCD.
This information is an essential step if additional assistance is required to diagnose the problem.
Isolate the problem between the control and the system. Now that the sequence of operation is known
and the system is sketched, is the control operating the proper pumps and valves at the correct times?
Is the control receiving the correct signals from the system as to when it should be operating? Are the
proper items selected in the menus of the control for the device that is to be operated?
Test the contacts, voltages and sensors. Using a multimeter, ensure that the control is receiving
adequate voltage to the power terminals and the demand terminals as noted in the technical data. Use
the multimeter to determine if the internal contacts on the control are opening and closing correctly.
Follow the instructions in the Testing the Wiring section to simulate closed contacts on the terminal
blocks as required. Test the sensors and their wiring as described in the sensor Data Brochures.
Isolate the
Problem
Test the Contacts,
Voltages and
Sensors
Document the
Control