Steffes 5140 Owner & Installers Manual - Manual (Page 36)

Appendix  A.11 Comfort Plus Hydronic
Error Code Description
03 Outlet water temperature is out of normal operating range. This can indicate an open sensor, a
short in the wiring, or a circuit board which is out of calibration.
04 Discharge air temperature is out of normal operating range. This can indicate an open sensor, a
short in the wiring, or a circuit board which is out of calibration.
05 Outdoor sensor (direct wired) temperature reading is out of normal operating range. The
sensor 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
operating range. Check the outdoor sensor attached to the transmitting device and the
transmitter for proper operation.
07 Main 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 can be caused by a defective board interface cable or an unresponsive Base I/O
board.
21 There is no communication occurring with the first relay expansion board. The board
interface cable may be defective or the first expansion board may be unresponsive.
22 There is no communication occurring with the second relay expansion board. The board
interface cable may be defective or the second expansion board may be unresponsive.
23 There is no communication occurring with the Steffes time clock module.
24 Temperature sensor offset/reference is out of range and indicates one of the sensors is shorted
to ground, the processor control board is out of calibration, or the blower/control circuit is
connected to an improper input voltage.
25 Power line carrier system is active; however, no good data has been received.
26 Insufficient main control board memory. Contact a qualified service technician.
27 Insufficient permanent memory. Contact a qualified service technician.
28 Permanent memory change has been made. Press the M button to accept. This error message
indicates a change has been made to the software program; therefore, 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 qualified service technician.
30 Base I/O control board is in test mode. Check the jumper configuration.
31 Relay expansion board(s) are in test mode. Check the jumper configuration.
39 Indicates the value in Configuration 2 (C002) has been set to a value greater than the value in
Configuration 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
qualified service technician.
41-44 Contact a qualified service technician.
Cold Core Temperature of the brick core is below 40 degrees or the core sensing thermocouple may be
open.
Core Fail Core high limit switch may be open.
PLC Fail The system is configured for power line carrier control; however, is not receiving a valid
power line carrier communication signal.