User`s guide

Chapter 7: Troubleshooting and Reconfiguring Series D8 User’s Guide
164 Watlow Anafaze Doc. 0600-3120-2000
If the Battery Dead alarm occurs, the controller displays an
alarm message and the global alarm output turns on. Ac-
knowledging the alarm restores all settings to factory defaults
and turns off the global alarm output.
CAUTION! Acknowledging this alarm restores all setting
to factory defaults.
NOTE! The controller retains its settings when pow-
ered. The battery is required to keep the set-
tings in memory only while the controller is
not powered.
If a replacement controller is available:
1. Replace the controller.
2. Enter the parameter settings into the new controller.
If you must use the controller with the failed battery:
1. Acknowledge the Battery Dead alarm. This restores all
setting to factory defaults.
2. Using your record of controller settings, re-enter your
settings.
H/W Error: Gain or Offset
Gain and Offset alarms indicate that a hardware error is pre-
venting accurate measurements. If a Gain or Offset alarm oc-
curs, the control outputs are turned off, an alarm message is
displayed and the global alarm output turns on. Acknowledg-
ing the alarm turns off the global alarm output. The error
clears when the condition no longer exists and the alarm has
been acknowledged.
If the controller displays H/W error: Gain or H/W error: Off-
set:
1. Switch the power to the controller off, then on again.
2. If the alarm persists, make a record of all controller set-
tings, then clear the RAM. See Clearing the RAM on
page 169.
3. If the alarm is not cleared, contact your supplier for fur-
ther troubleshooting guidelines. See Returning a Unit on
page 158.