Error Code Description
16
Core H thermocouple temperature is out of normal operating range. Not used in 9100
Series.
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 DC voltage read-
ing across the input to ensure proper operation reading should be between .5vDC and
6.25vDC. Check wiring, and verify the value in L053 is correct for the application. Compare
the input reading to the value in L145 to verify proper calibration of the circuit board.
1vDC=0%, 3vDC=50%, 5vDC=100%.
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. L090 will vary depending on the software
version installed.
20
There is no communication occurring between the base I/O board and the processor
control board. A defective board interface cable or an unresponsive base I/O board can
cause this.
21
There is no communication occurring with the first Energy Management Controller. If
installed, the interface cable may be defective or the Energy Management Controller may
be unresponsive. Check the jumper configuration on the Energy Management Controller to
ensure that J1 and J2 are both in the “OFF” position. Verify that the value in L053 is correct
for the application.
22
There is no communication occurring with the second relay Energy Management
Controller. If installed, the interface cable may be defective or the Energy Management
Controller may be unresponsive. Check the jumper configuration on the Energy
Management Controller and make sure J1 is “ON” and J2 is “OFF”. Verify that the value in
L053 is correct for the application.
23
There is no communication occurring with the Steffes Time Clock Module. If this module is
installed, the interface cable or the time clock module may be defective. If the Time Clock
Module is not being used, verify the value in L035.
24
Temperature sensor offset/reference is out of range. A sensor or brick core thermocouple
may be shorted to ground or the processor control board may be defective.
25
The heater is configured for power line carrier; however, is not receiving a valid power line
carrier communication signal. This will display as Er25 when using BACNet and PLC fail on
the system display.
26
Insufficient main control board memory (RAM). 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.
30
Base I/O relay board is in test mode. Check that both jumpers on the board are in the “OFF”
position.
31
Energy Management Controller(s) are in test mode. Check the jumper configuration.
39
If the value in Location 13 (L013) is set to a value greater than the value in Location 12
(L012), error 39 (Er 39) is displayed and the system space heats only until the values are
corrected.
40
Indicates memory corruption has occurred. Replace the processor control board.
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