Watlow CPC400 - Manual (Page 159)

CPC400 Series User’s Guide Chapter 6: Troubleshooting and Reconfiguring
Doc. 0600-2900-2000 Watlow Anafaze 145
Corrective and Diagnostic Procedures
The following sections detail procedures you may use to di-
agnose and correct problems with the controller.
Low Power
If the controller displays Low power or the display is not lit:
1. Turn the power to the controller off, then on again.
2. If the Low power alarm message returns, check that
the power supplied to the controller is at least 12.0V
Î
(dc) at 1 A. See Wiring the Power Supply on page 24.
3. If the alarm message returns again, make a record of
all controller settings. Then, clear the RAM. See Clear-
ing the RAM on page 153.
4. If the alarm is not cleared, contact your supplier for
further troubleshooting guidance. See Returning a
Unit on page 140.
Battery Dead
The Battery dead alarm indicates that the battery in the
CPC400 is not functioning correctly. This alarm occurs
upon powerup only. The alarm indicates that values stored
in memory may have been corrupted because of battery
failure.
NOTE! The controller retains its settings when powered.
The battery is required to keep the settings in
memory only when the controller is powered
down.
If a replacement controller is available:
1. Make a record of all controller settings. Verify that the
settings are correct, because memory failure may have
changed some settings.
2. Replace the controller.
3. Enter the settings into the new controller.
If you must use the controller with the failed battery:
1. Make a record of all controller settings. Verify that the
settings are correct, because memory failure may have
changed some settings.
2. Clear the controller RAM; see Clearing the RAM on
page 153. Clearing the RAM clears all settings, includ-
ing internal settings that may have been corrupted.
3. Re-enter your settings.