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Thread: Jandy AquaPure 700 Codes 120/121

  1. Back To Top    #1

    Join Date
    May 2015
    Location
    Newberry, FL
    Posts
    3

    Jandy AquaPure 700 Codes 120/121

    I have the old Jandy AquaPure 700 Power Center and the new 3 port cylindrical salt cell. The Power center is saying Service with error code 120 (when in forward mode) and 121 (when in reverse mode). I found the troubleshooting guide but have been unable to diagnose the problem. Here are the details:

    1) Cell, PIB board and DC cord were all replaced, but am still getting the same codes. The only things not replaced are the front board, the transformer and the flow sensor.
    2) I measured the voltage at all of the test points and here they are:

    Cell: 36.3 VDC ***

    Back Board
    ------------
    1-8: 80.3 VAC
    2-7: 71.3 VAC
    3-6: 21.1 VAC
    4-5: 94.8 mVDC ***

    Voltage coming into Transformer: 245 VAC

    Front Board
    -------------
    AC: 20.8 VAC
    HK: 89 mVDC ***
    Salinty/R-Temp/KeyC: 2.5 gpl ***
    Salinty/R-Temp/KeyD: 74 F
    H-Temp/KeyC/KeyA: 90 F

    I put *** next to the readings that seem to be out of spec. Also, the cell seems to be still generating chlorine as the level of chlorine in the pool is fine. Does anyone know what the issue might be?

    Thanks,
    Dan

  2. Back To Top    #2

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
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    Re: Jandy AquaPure 700 Codes 120/121

    Is the PIB board correctly configured for a 700 sized cell. The default is configured for a 1400 sized cell. Make sure the cell is clean and how old is it?
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  3. Back To Top    #3

    Join Date
    May 2015
    Location
    Newberry, FL
    Posts
    3

    Re: Jandy AquaPure 700 Codes 120/121

    Hi Ping,

    The cell is only 8 months old. How do you configure PIB for 700 size cell? Is there a jumper?

    Thanks,
    Dan

  4. Back To Top    #4

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,669

    Re: Jandy AquaPure 700 Codes 120/121

    Yes, you need to make sure the jumper is cut. See this workbook, http://www.nuccibros.com/sec_0934drR...20Workbook.pdf.

    Thit workbook will have all of your troubleshooting solutions.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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