Maintenance and Troubleshooting
17
Error Codes
Some DataTime
®
displays have their own built-in troubleshooting mechanism. Failures that occur in the
display driver use codes. If a display malfunctions, a failure code registers by showing an Ex value on the first
two digits of the display. E indicates an error, and x represents the code number. Refer to the following table
for a description of each failure code and for possible solutions.
Note:
The LCD screen on the DM-100 controller will not show the following failure codes. Failure codes are
only shown on the DataTime
®
display.
Power On Self-Test
A useful troubleshooting tool is the power on self-test the host driver performs every time it powers up:
• If the signal wiring between each controller is
correct, the first two digits of each driver display
Ad momentarily, and the first digit flashes three
numbers indicating the decimal address set with
the address switch. (If a client driver display’s
A <number>, followed by P <number>, it is not
receiving signal in, and is performing its own self-test.)
• The first two digits of each line display Lx, where x is the line number that the driver is set to control
using the address switch (set with address plug on older drivers).
• Each line displays 1234… according to the column number of each of its digits. Every line should
show 1 on the left-most digit, and all digits should be numbered consecutively from left to right.
If this is not the case, either the wrong address is set, or the driver or digit harness is connected
incorrectly.
If no address is set on the host driver, it will display E5, and all client drivers will continually cycle through
the power on self-test.
Failure Code Description
Possible Solution
E1
Protocol Setting Error:
There is an unsupported
driver protocol setting.
Check the value set in the protocol plug of the
driver (J20).
E2
Time Error:
No valid time is stored in the driver; it
may be a failure of the real-time clock on board or
other timekeeping device.
Set the time in the display using the
Set Time
menu option on the DM-100 controller.
E3
Temperature Error:
No response coming from
the temperature sensor, or general temperature
sensor failure.
Check the temperature sensor location and verify
all connections. Refer to
Section 2
for wiring
information.
Note:
The temperature sensor takes about 10
seconds to initialize on power up. The display
shows this error until initialization is complete
If a temperature sensor is not used, set the hold
time to zero.
E4
No Message Error:
This code is shown when no
messages are downloaded to the display
Download a new message to the display using
the
DISPLAY SEQUENCE
key on the DM-100
controller.
E5
No Line Number Selected Error:
The driver for
this line has a Protocol-4 plug installed in J20, but
the address is not set on the address switch.
Set the line number by setting the address
using the address switch. The Protocol-4 plug
designates this driver as the “host.” If this is not
the host, remove the Protocol-4 plug from J20.
Driver Firmware Version
(r:XX)
Address
(Ad:XX)
Line number
(L:X)
Columns
(1234)