Watlow CLS200 - Manual (Page 185)

CLS200 Series User’s Guide Chapter 9:Troubleshooting and Reconfiguring
Doc.# 0600-3050-2000 Watlow Anafaze 169
range of 23 to 32° F or 122 to 131° F (-5 to 0° C or 50 to
55° C). The operating limits are 32 to 122° F (0 to 50° C).
If the controller displays AW in the lower left corner of the
display:
1. Acknowledge the alarm.
2. If the error message remains, check the ambient air
temperature near the controller. Adjust ventilation,
cooling or heating to ensure that the temperature
around the controller is 32 to 122° F (0 to 50° C). If the
unit is functioning correctly, the error will clear when
the ambient temperature is within range and the
alarm has been acknowledged.
3. If the ambient temperature is within range and the er-
ror persists:
a) Turn the power to the controller off.
b) Remove the boards from the CLS200 housing.
See Replacing the EPROM on page 176.
c) Reseat the boards and turn the power on.
4. If the error persists, make a record of the settings then
perform a
NO-key reset. See NO-Key Reset on page 176.
5. If the error is not cleared, contact your supplier for fur-
ther troubleshooting guidelines. See Returning Your
Unit on page 164.
H/W Ambient Failure
The hardware ambient failure alarm indicates that the am-
bient sensor in the CLS200 is reporting that the tempera-
ture around the controller is outside of the acceptable
range of 0 to 50° C. This error can also occur when there is
a hardware failure.
If the controller displays H/W AMBIENT FAILURE:
1. Acknowledge the alarm.
2. If the error message remains, check the ambient air
temperature near the controller. Adjust ventilation,
cooling or heating to ensure that the temperature
around the controller is 0 to 50° C. If the unit is func-
tioning correctly, the error will clear automatically
when the ambient temperature is within range and
the alarm has been acknowledged.
3. Remove any connections to the 5V Î (dc) reference
(TB1-18) on the back of the controller. If this corrects
the problem, there was an error in the wiring. You
may need to consult technical support to determine
the correct wiring.
4. If the ambient temperature is within range and the er-
ror persists: