Press
~
twice-
Read
error
Figure 32
-
Error Code Display
Examples
J
NOTE:
Electrical noise or a
noise event, vibra-
tion or excess
environmental
moisture or tem-
perature may cause
Series 985 errors to
occur.
If the cause
of an error is not
otherwise apparent,
check for these.
•If the alarm is non-latching...
The alarm
will
clear
itself
automatically as soon as the process
temperature is inside the alarm limit by
3°F/l.7°C
for 1°
RTD
units, or
0.3°F/0.
17°C
for 0.1° RTD units.
A
1
l
CAUTION:
An alarm display will be masked by an error
condition
or when the
control is in the Calibration or Set Up Menus.

How To Deal With Error Codes

J’

Three dashes,
“-
-
-",
in the upper display
indicate
a
Series
985 error.
l
If operator access is LOC 0 or 1 . . .
l
Press the AUTO/MAN key twice to see the error code for one
second.
•
If operator access is LOC 2 or
3...
l
The error code is already in the
lower
display.
•
Error code definitions and actions...
Er
1
-
Sensor overrange error
The sensor input is generating a value that is higher than that allowed for
the range of this sensor, or the A/D circuitry is not functioning properly.
Enter a valid input.
Er
2
-
Sensor underrange error
The sensor input is generating a value that is lower than that allowed for
the range of this sensor, or the A/D circuitry is not functioning properly.
Enter a valid input.
Er
3
-
Ambient error
Check the specification for the ambient temperature range.
Er
4
-
Configuration error
The unit’s microprocessor is faulty; call the factory.
Er
5
-
Non volatile checksum error
The nonvolatile memory checksum has discovered a checksum error.
Unless a momentary power interruption occurred while the unit was
storing data, the nonvolatile memory is bad. Call the factory.
Er
7
-
A/D
overflow error
The A/D circuit is
over-
or under-range. An open or reversed polarity
sensor is the most likely cause. Check the sensor; if it is connected and
functioning properly, then call the factory.
To clear a corrected error...
l
Cycle power to the control.
32
WATLOW Series 980/985 User’s Manual Tuning and
Operating,
Chapter
5