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P/N 472089 Rev. E 4-19-05
28
Section V. Troubleshooting
Troubleshooting Instruction
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TROUBLESHOOTING (DDTC)
The DDTC temperature display contains three LED’s with a decimal point between the first and second, this
display is also used to display an error code if for some reason there is a failure within the heater control
system or a DDTC internal fault. The DDTC will display the actual temperature or set-point temperature or
OFF, as selected by the user. When DDTC detects an error, the display will show Exx, see Figure 27, where
Exx is the error code of DDTC fault, see Table 11. Codes 1 through 9 indicate a “soft lockout” error that
means after these errors are fixed, the heater will resume normal operation and restart immediately. Code
ERR indicates a “hard lockout” error that means after these errors are fixed, you need to reset the power of
the heater through the switch on the bottom of the electrical junction box on the right side of the cabinet.
NOTE: If Code ERR is shown on the LED display at any time, turn the heater off, (from power switch),
then turn on the heater again. If the error code is still displayed, call a certified Pentair Service Technician
for repair.
Table 11.