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** Problem D: Display Reads NNNN or UUUU **
The control boards have the ability to detect an
OPEN or SHORTED temperature sensor. These
two conditions are shown on the display as follows:
DISPLAY
Before coming to the conclusion that the probe is
bad when one of these displays appear, check the
connection of the probe to the circuit board for
polarity and alignment.
* Problem E: Display Reads all Eights (8888) *
1. The most common problem cause of this
problem is the failure of the driver integrated
circuit on the DISPLAY/KEYBOARD board
(#3176679). Replace it.
CONDITION
SHORT CIRCUIT
OPEN CIRCUIT
*** Problem F: Pump Does Not Circulate ***
Water
1. Verify that the water level is above both the
pump inlet and outlet.
2. If the pump is not running, verify that power is
applied to the bath. If power is present, check
wiring of pump to power switch. If wiring is
correct, replace the pump.
3. If pump is running but water is not circulating,
open the control panel and gently squeeze the
long piece of rubber tubing a few times to help
remove any air trapped within the pumping
system.
4. If water is still not circulating, check for foreign
matter in the pump inlet fitting.
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