tekmar 546 Thermostat Installation - Manual (Page 40)

© 2008 D 546 - 07/08 40 of 44
Error Messages (2 of 4)
Error Message Description
DEVICE LIMIT
You have installed more than 24 devices on the tN4 bus. You must remove the additional
devices and move them to a different bus if possible.
DIP SWITCH 2 MODE
The tN4 System Control DIP switch is set to None and the thermostat has detected a tN4
System Control. The thermostat does not operate until this error is corrected. The tN4 System
Control DIP switch must be set to tN4 System Control.
ROOM SENSOR SHORT CIRCUIT
Due to a short circuit, the thermostat failed to read the built-in sensor. If either Sensor
1, 2, or 3 are set to ROOM, or the thermostat is connected to a tN4 System Control, the
thermostat continues to operate. Otherwise, the thermostat stops operation. To clear the
error, press either the Menu or Item button. If the error does not clear, contact your tekmar
sales representative.
ROOM SENSOR OPEN CIRCUIT
Due to an open circuit, the thermostat failed to read the built-in sensor. If either Sensor
1, 2, or 3 are set to ROOM, or the thermostat is connected to a tN4 System Control, the
thermostat continues to operate. Otherwise, the thermostat stops operation. To clear the
error, press either the Menu or Item button. If the error does not clear, contact your tekmar
sales representative.
SENSOR 1 SHORT CIRCUIT
Due to a short circuit, the thermostat failed to read Sensor 1. 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, the error message automatically clears.
SENSOR 1 OPEN CIRCUIT
Due to an open circuit, the thermostat failed to read Sensor 1. 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, the error message automatically clears.
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, the error message automatically clears.