Steffes 8188 User Manual
Page 34
A
PPENDIX
A.08
T
HERM
E
LECT
Error Code #
Description
06
Outdoor temperature reading 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
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
Aux. 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 otherwise
defective thermocouple or a circuit board which is out of calibration can cause this. Check the
thermocouple by taking a millivolt reading of 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 otherwise
defective thermocouple or a circuit board which is out of calibration can cause this. Check the
thermocouple by taking a millivolt reading of 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 otherwise
defective thermocouple or a circuit board which is out of calibration can cause this. Check the
thermocouple by taking a millivolt reading of 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
Core F thermocouple temperature is out of normal operating range. An open, shorted, or otherwise
defective thermocouple or a circuit board which is out of calibration can cause this. Check the
thermocouple by taking a millivolt reading of the thermocouple. Compare the thermocouple reading to
the value in L139 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
15
Core G thermocouple temperature is out of normal operating range. An open, shorted, or otherwise
defective thermocouple or a circuit board which is out of calibration can cause this. Check the
thermocouple by taking a millivolt reading of the thermocouple. Compare the thermocouple reading to
the value in L140 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
16
Core H thermocouple temperature is out of normal operating range. An open, shorted, or otherwise
defective thermocouple or a circuit board which is out of calibration can cause this. Check the
thermocouple by taking a millivolt reading of the thermocouple. Compare the thermocouple reading to
the value in L141 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
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 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 is 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 defec-
tive or the relay driver board may be unresponsive. Verify that the values in L090, L091, and L092 are
correct for the application.
Appendix