Clearing blinking EC code on Jandy SF1400 after Power Interface Board replacement

mcquah

New member
May 24, 2025
1
Stony Point, NY
I need help figuring out how to clear the EC code that is blinking on my user interface after I replaced the board. Everything is connected—checked and double checked. The manual says that the EC code indicates that the ORP or external controller has shut off chlorine production. The only problem with that is I do not have an ORP or external controller installed. The only thing new is the control board and I can’t find any information about this issue in the manual or on Jandy’s site.
I was wondering if I need reset or pair the user interface with the control board somehow. Right now the user interface displays info about the temp, salinity and flow but it keeps flashing the EC code and won’t start generating chlorine. Any help would be greatly appreciated.
 
Put J14 in POS 1.

3.9 Operation of External Control/ORP Control Board

An external device such as an ORP (Oxidation Reduction Potential) controller supplying 24 Volts AC can be used to control the output of the chlorine generator.

The chlorine generator Power Interface Board (PIB) can be set up in the field to operate in two (2) different modes.

The mode of operation is determined by the position of a movable jumper J14.

See Figure 17 for location.

POS-1 (Wait at least one (1) minute after applying power. See note 1.)

With J14 jumper set to POS-1 and no voltage applied to the ORP 24 VAC connector J15, the chlorine generator works normally displaying the production rate of 0% to 100% on the display of the user interface.

When 24 Volts AC is applied to the ORP 24 VAC inputs, chlorine production will be disabled.

The display of the user interface will then flash “EC” (external control).

Once the 24 Volts AC input is removed the chlorine generator will return to normal operation.

The “EC” will be replaced with the current production setting of 0% to 100%.

POS-2 (Wait at least one (1) minute after applying power. See note 1.)

Placing the jumper in POS-2 allows the chlorine generator to operate in the opposite way to POS1.

With 24 Volts AC applied to the ORP 24 VAC inputs, chlorine production will be enabled.

The display of the user interface will display a production rate of 0% to 100%.

When the 24 Volts AC is removed the display will flash “EC” every few seconds and chlorine production is disabled.

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