Steffes 6140 - Manual (Page 31)

Error Code Description
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. If using power line carrier control, make sure the values in
L020 and L035 have been set appropriately. Otherwise, verify that the outdoor sensor is con-
nected properly. Compare the sensor reading to the value in L113 to verify proper calibration of
the circuit board. Approximate ohm readings are 5°F = 7,646 ohms; 50°F = 2,024 ohms;
95°F = 646 ohms.
06 Outdoor temperature reading from the transmitting device (PLC system) is out of normal operat-
ing 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 External duct sensor temperature is out of normal operating range. This can indicate an open
sensor, a short in the wiring, or the relay driver board is out of calibration. Take an ohm reading
across the sensor to ensure proper operation, check the wiring, and verify the value in L053.
Compare the sensor reading to the value in L144 to verify proper calibration of the circuit board.
Approximate ohm readings are 60°F = 1552 ohms; 70°F = 1199 ohms; 80°F = 941 ohms.
Max 190°F, Min 0°
09 Auxiliary analog input is out of normal operating range. Currently not used.
10 Discharge air temperature has exceeded maximum standard operating temperatures.
11 Core C thermocouple temperature is out of normal operating range. An open, shorted, or other-
wise defective thermocouple or a circuit board which is out of calibration can cause this. Read
mV DC across the thermocouple. Compare the thermocouple reading to the value in L136 to
verify proper calibration of the circuit board. Approximate DC mV readings are 200°F = 3.8
mV; 700°F = 15.2 mV; 1200°F = 27.0 mV. Max. 1700°F, min 0°F
12 Core D thermocouple temperature is out of normal operating range. An open, shorted, or other-
wise defective thermocouple or a circuit board which is out of calibration can cause this. Read
mV DC across the thermocouple. Compare the thermocouple reading to the value in L137 to
verify proper calibration of the circuit board. Approximate DC mV readings are 200°F = 3.8
mV; 700°F = 15.2 mV; 1200°F = 27.0 mV. Max. 1700°F, min 0°F
13 Core E thermocouple temperature is out of normal operating range. An open, shorted, or other-
wise defective thermocouple or a circuit board which is out of calibration can cause this. Read
mV DC across the thermocouple. Compare the thermocouple reading to the value in L138 to
verify proper calibration of the circuit board. Approximate DC mV readings are 200°F = 3.8
mV; 700°F = 15.2 mV; 1200°F = 27.0 mV. Max. 1700°F, min 0°F
14-16 Not used in Comfort Plus Commercial systems.
17 Load Control Device (4-20mA) is out of normal range. This can indicate an open sensor, a short
in the wiring, or a relay driver board which is out of calibration. Take a mA reading across the
input to ensure proper operation, check the wiring, and verify the value in L053. Compare the
sensor reading to the value in L142 to verify proper calibration of the circuit board. All heating
elements should be turned off. Max. 25mA, min 2mA
18 Pulse reading is not functional. The pulse input reading is indicating 0 load even though there are
elements, 2 minimum, turned on. All loads should be turned off.
19 There is no communication occurring with the relay driver board. The interface cable may be
defective or the relay driver board may be unresponsive. Verify that the values in L090, L091,
and L092 are correct for the application.
Appendix
Comfort Plus Commercial Appendix
n
A.07