tekmar 542 Thermostat Installation User Manual
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© 2007
D 542 - 08/07
Error Message
Description
SENSOR 2 SHORT CIRCUIT
Due to a short circuit, the thermostat failed to read Sensor 2. The thermostat displays the
error and continues to operate unless:
No other Room sensors are available and the thermostat is not connected to a tN4 System
control. Then the thermostat stops operation.
No other Floor sensors are available and the Floor Maximum is not set to Off, then the H1
contact no longer operates.
Locate and repair the problem as described in the Data Brochure D 070. Once the error is
corrected, press any button to clear the error.
SENSOR 2 OPEN CIRCUIT
Due to an open circuit, the thermostat failed to read Sensor 2. The thermostat displays the
error and continues to operate unless:
No other Room sensors are available and the thermostat is not connected to a tN4 System
control. Then the thermostat stops operation.
No other Floor sensors are available and the Floor Maximum is not set to Off, then the H1
contact no longer operates.
Locate and repair the problem as described in the Data Brochure D 070. Once the error is
corrected, press any button to clear the error.
SENSOR ERROR
All of the sensors have been set to Off or None including the built-in sensor and the tN4
System Control DIP switch is set to None. The thermostat stops operation.
Turn on at least one sensor or connect the thermostat to a tN4 system control and set the
tN4 System Control DIP switch to tN4 System Control.
COOL GROUP MEMBER ERROR
The thermostat can no longer detect its cool group master. Check the communication
connections for open or short circuits. Once the cool group master has been detected, the
error message clears.
SCHEDULE MASTER ERROR
Two thermostats have been set to the same SCH MSTR setting. Select a different SCH MSTR
setting for the thermostat. The thermostat operates in the Occupied mode while this error
message is present. The error message clears automatically once the error is corrected.
SCHEDULE MEMBER ERROR
The thermostat can no longer detect its schedule master. Check the communication connections
for open or short circuits. Once the schedule master has been detected, the error message
clears.
DEVICE ERROR AT ADDRESS #:##
#:## is the address of the device with the error. The bus number displays before the colon,
and the device number displays after. Go to the device with the address displayed.
Possible Addresses:
01 to 24
- Device Error on Thermostat only network
b:01 to b:24 - Device Error on Boiler Bus
1:01 to 1:24 - Device Error on Bus 1
2:01 to 2:24 - Device Error on Bus 2
3:01 to 3:24 - Device Error on Bus 3
CTRL
- Device Error on System Control
MIX1
- Device Error on Mixing Expansion Module (See System Control for local error)
MIX2
- Device Error on Mixing Expansion Module (See System Control for local error)
MIX3
- Device Error on Mixing Expansion Module (See System Control for local error)
Error Messages (3 of 3)