Installation manual

Series C Controller Configuration and Operation Manual
19-2  Athena Controls, Inc. 900M050U00
19.3 Problem with Controller
19.3.1 Introduction
If the controller detects a problem with its own operation, it displays ErrErr on the top line
instead of the process value and displays a numerical code on the lower line instead of
the setpoint. For example, if the controller detects a checksum error, the display will
show:
ErrErr
01000100
19.3.2 Controller Error Codes
The table below lists the error messages and codes that the 16C, 18C, and 25C
controllers display in place of the setpoint value when a self-diagnostic is failed by the
controller. These error conditions can be read from all controllers (including 1ZC
controllers) by a MODBUS master or a Multi-Comm host.
The effect of the error condition on the controller’s outputs depends on the error, as
described below.
Display Error Condition Operator Action
0100
controller processor
checksum error
This message is usually
displayed only at startup,
before any outputs are
calculated.
Press any key to clear the message.
0101
RAM error
This message is usually
displayed only at startup,
before any outputs are
calculated.
Press any key to clear the message. .
0202
default parameter values
were loaded automatically,
because the controller found
corrupted values stored on
the EEPROM
This message is usually
displayed only at startup,
before any outputs are
calculated.
Press any key to clear the message.
Re-configure all configuration parameter
values, including input type. .
0303
EEPROM write failure
This message is usually
displayed only at startup,
before any outputs are
calculated.
Press any key to clear the message.
Try the write operation again. If the message
recurs and persists, the EEPROM may be
worn out. Call for service. (See Note 1 below.)