tekmar 274 Boiler Control - Manual (Page 41)

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To Enable Zone Test:
1. Press and hold the Test button for more than 6 seconds.
The control displays ZONE TEST OFF and the Test LED
remains on.
Test Press and Hold
for 6 seconds
2. Press the Up button to change the display to ZONE
TEST ON. After 3 seconds, the boiler and all pumps
are shut off.
3. The control operates stage one of the tN4 device with
the lowest address number. Device number one (b:01)
has the lowest address number and device 24 (b:24)
has the highest address number. All other tN4 zones
are shut off.
4. Pressing the Up button will turn off stage 1, and turn on
stage 2 of the same device (if that device has a second
stage) or turn on stage 1 of the device with the next lowest
address. The Down button can be pressed to move to
a device with a lower address number. The second
stage of a two stage zone is indicated with a small 2 in
the display.
5. The Up and Down buttons can then be used to move
through the devices and the heating stages of each
device on the boiler bus.
To cancel the Zone Test press the Test button. Once the
Zone Test ends or is cancelled, the control resumes normal
operation.
Error Message Description
VIEW CONTROL ERROR ADJUST
The control failed to read the Adjust Menu settings, and reloaded the factory default settings.
Operation stops until you check all the Adjust Menu settings.
Note: To clear the error, the access level must be set to Advanced and the settings in the
Adjust menu must be checked.
VIEW CONTROL ERROR TIME
The control failed to read the Time Menu settings, and reloaded the factory default settings.
Operation continues normally.
Note: To clear the error, the access level must be set to Advanced and the settings in the
Time menu must be checked.
VIEW CONTROL ERROR SCHEDULE
The control failed to read the Schedule Menu settings, and reloaded the factory default
settings. Operation continues normally.
Note: To clear the error, the access level must be set to Advanced and the settings in the
Schedule menu must be checked.
VIEW CONTROL ERROR MISCELLANEOUS
The control failed to read the Miscellaneous Menu settings, and reloaded the factory default
settings. Operation continues normally.
Note: To clear the error, the access level must be set to Advanced and the settings in the
Miscellaneous menu must be checked.
VIEW TN4 BUS ERROR
Communication has been lost on the Boiler Bus due to a short or open circuit. Check the
tN4, C and R wires for each tN4 device. Check the polarity of the C and R wires. Check for
loose or broken wires. Press and hold the up and down arrow buttons together for 5 seconds
to manually clear error.
VIEW
DEVICE LOST
Communication is lost to a tN4 device on the Boiler Bus. The number shown is the address
of the lost device. The LCD on the lost device displays Bus Boil OPn. Ensure that there is
power to the lost device. Trace the wires from the control to the lost device looking for loose
or damaged wires. The error message self clears when the error condition is corrected.
Note: If you deliberately remove a tN4 device, hold the Up and Down buttons to clear the error.
VIEW
MASTER DEVICE ERROR
More than one tN4 System control has been detected on the tN4 bus. This generally indicates
that two tN4 buses are wired together. Check the tN4 bus wiring. The error message clears
once the error condition is corrected.
Error Messages (1 of 3)