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24
Troubleshooting
(continued)
e. There are some 2 stage computer sensors which vary in voltage in 2
steps. These sensors drop in voltage until they reach a certain
temperature (example 200°) then the engine raises the power level
suddenly to have another similar drop in voltage. You might be able to
program the FAN-PWM to work within ONE of these stages. But as a
side effect, it will work also in the other stage which means the fan may
operate when not necessarily needed. For complete proper operation
in this case you will need to use a SPAL temperature sensor.
CODE 3: High & Low Program Data Error (continued)
CODE 4: Module Over Current Error
Over current protection means that the output will SHUT DOWN if the mea-
sured fan continuous run current increases above 30A for extended periods. If
running a fan that is approaching this amount of current draw (>25A), SPAL USA
recommends that the installation also include a status light so the operator will
be aware of the fan status.
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