H/w error: ambient, H/w error: ambient 165 – Watlow Series D8 User Manual
Page 183
Series D8 User’s Guide
Chapter 7: Troubleshooting and Reconfiguring
Doc. 0600-3120-2000
Watlow Anafaze
165
NOTE!
If the controller has failed, it is likely that it
was damaged by excessive voltage or noise.
Before replacing the controller, troubleshoot
for noise and ground loops.
H/W Error: Ambient
The H/W error: Ambient alarm indicates that the ambient sen-
sor in the D8 is reporting that the temperature around the con-
troller is outside of the acceptable range of 0 to 50° C. This
alarm can also occur if there is a hardware failure.
If an H/W Error: Ambient alarm occurs, the control outputs
are turned off, an alarm message is displayed with the ambient
temperature and the global alarm output turns on. Acknowl-
edging 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: Ambient:
1. Acknowledge the alarm and check the ambient air tem-
perature near the controller. Adjust ventilation, cooling
or heating so that the temperature around the controller is
0 to 50° C. If the unit is functioning correctly, the alarm
will clear automatically when the ambient temperature is
within range.
2. If the ambient temperature is within range and the alarm
persists, reseat the board assembly:
a) Switch off power to the controller.
b) Remove the board assembly from the D8 housing.
See Replacing the Flash Memory Chip on page 170,
steps 2 to 5.
c) Reseat the board assembly and reassemble the con-
troller. Reverse the steps refered to above to reseat.
d) Switch on power to the controller.
3. If the alarm persists, make a record of all controller set-
tings, then clear the RAM. See Clearing the RAM on
4. If the alarm is not cleared, contact your supplier for fur-