Installation manual
900M050U00 Athena Controls, Inc. 19-1
19. Error Messages and Codes
19.1 Introduction
As described in Section 2, usually the controller displays the process variable on the top
line and the setpoint on the lower line of the display. When the controller is in a mode
other than normal (automatic), the mode alternates with the PV. However, when the
controller detects a problem with the input signal or with its own operation, messages and
codes are displayed to alert you to a condition that requires your immediate attention.
19.2 Problem with Input Signal
19.2.1 Introduction
When the controller detects a problem with the input signal, a message is displayed on
the top line in place of the process value. For example, if the controller detects an open
sensor when the setpoint is 250, the display would look like this:
ErHiErHi
250250
19.2.2 Input Error Messages
The table below lists the error messages and codes that the 16C, 18C, and 25C
controllers display in place of the process value when a problem with the input is
detected by the controller. These error conditions can be read from all controllers
(including 1ZC controllers) by a MODBUS master or a Multi-Comm host.
When the controller detects any of these sensor problems, the controller’s outputs will go
to the percentage specified using the failsafe values (if any) configured using the FS01FS01
and FS02FS02 parameters in the SUPrSUPr (supervisor) menu (see 12.2).
Display Error Condition Operator Action
ErHi
open sensor Check the sensor and wiring.
This message will clear when the problem has
been corrected.
ErLo
reversed sensor Make sure the correct input type has been
selected for the input type parameter.
Check sensor polarity.
This message will clear when the problem has
been corrected.
LPbr
loop break; the input value
has not changed for the time
period specified using the
supervisor menu’s loop
break time parameter.
Check sensor and wiring.
This message will not clear automatically when
the problem has been corrected. You must
cycle the power to the controller to clear the
message and to cause the controller to resume
normal operation.