Steffes 2102 - Page 25

Error Code Description
03 Room thermistor temperature is out of normal range. This may indicate an open thermistor, a short
in the wiring, or a circuit board which is out of calibration.
04 Discharge air temperature is out of normal range. Ensure proper operation of the damper system.
Also, an open, shorted, or otherwise defective output sensor or a circuit board which is out of
calibration could cause this.
05 Outdoor sensor (direct wired) temperature reading is out of normal range. The thermistor circuit
may be open or shorted, the processor control board may be out of calibration, or there may be an
incorrect value in L035.
06 Outdoor sensor temperature from the transmitting device (PLC system) is out of normal range.
Check the outdoor sensor attached to the transmitting device and the transmitter for proper
operation.
07 Processor control board temperature sensor is out of normal operating range. Verify that none of the
clearances have been violated and inspect the condition of the processor control board.
08 Currently not utilized.
09 Currently not utilized.
10 Discharge air temperature has exceeded maximum operating temperature.
20 There is no communication occurring between the Base I/O board and the processor control board.
This may be caused by a defective board interface cable or an unresponsive Base I/O board.
21 Contact a qualied service technician.
22 Contact a qualied service technician.
23 There is no communication occurring with the Steffes Time Clock Module.
24 Temperature sensor offset/reference is out of range and indicates that one of the sensors may be
shorted to ground or the processor control board may be out of calibration.
25 Contact a qualied service technician.
26 Insufcient Main Control Board Memory. Contact a qualied service technician.
27 Insufcient Permanent Memory. Contact a qualied service technician.
28 Permanent memory change has been made. Press the M button to accept. As this error message
indicates a change has been made to the software program, it is important to verify that all location
settings are correct for the application.
29 On-board communication system is not fully operable. Contact a qualied service technician.
30 Base I/O circuit board is in test mode. Check the jumper conguration on the circuit board.
31 Contact a qualied service technician.
39 Indicates the value in Conguration 2 (C002) has been set to a value greater than the value in
Conguration 1 (C001). The system will not charge until the value in C002 is set lower than C001.
40 Press and release the M button to clear the error. If the error code reappears, contact a qualied
service technician.
41-44 Contact a qualied service technician.
Cold Core The temperature of the brick core has dropped below 40 degrees or the brick core sensor may be
open. Verify that the brick core sensor wiring is connected properly.
Core Fail Core charging and/or clearance violation high limit switch may be open.
PLC Fail The system is congured for power line carrier; however, is not receiving a valid power line carrier
communication signal.
2100 Series Appendix A.07