Estimated Life Remaining
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of estimated life remaining
Look up AquaPure service codes and estimate AquaPure 700 or 1400 cell remaining life based on usage, chemistry, and operating conditions.
Low current detected in the forward direction to the cell. This may indicate a failing cell, loose wiring, or low salt level affecting conductivity.
Worn cell plates, loose cell cord connection, or salt level below operating range.
Check salt level (maintain 3,000–3,500 ppm). Inspect cell cord connections. Clean or replace cell if plates are eroded.
Low current detected in the reverse polarity direction. The AquaPure reverses polarity to self-clean; low reverse current suggests scale buildup or cell degradation.
Heavy calcium scale on one side of the plates, or cell nearing end of life.
Acid wash the cell (4:1 water to muriatic acid). If code persists after cleaning, the cell likely needs replacement.
Current to the cell is critically low. The unit cannot produce chlorine at this level. This typically indicates a failed cell or extremely low salt.
Cell plates completely scaled or eroded, salt level well below 2,000 ppm, or disconnected cell cable.
Test salt independently. Inspect cell visually — if plates are black or flaking, replace the cell. Check all wiring connections.
The cell is drawing more current than expected. This can occur with very high salt levels or an electrical fault in the cell.
Salt level above 4,000 ppm, or a short circuit developing in the cell plates.
Test salt level. If above 3,500 ppm, dilute with fresh water. If salt is normal, inspect the cell for physical damage and replace if necessary.
The AquaPure has detected conditions consistent with scale buildup on the cell plates. Chlorine production efficiency is reduced.
Calcium carbonate deposits from high pH, high calcium hardness, or inadequate self-cleaning cycles.
Remove and acid wash the cell. Maintain pH at 7.2–7.4 and calcium hardness below 400 ppm to prevent recurrence.
Low forward current combined with VAC input voltage below 100V (120V units) or 200V (240V units). The unit cannot produce adequate chlorine under these conditions.
Undersized wiring, shared circuit with high-draw equipment, or utility voltage sag.
Check incoming voltage at the unit with a multimeter. Ensure dedicated circuit and proper wire gauge. Contact electrician if voltage is consistently low.
Low current in the reverse polarity direction combined with low input voltage. Both the cell and the power supply may need attention.
Low line voltage compounding cell degradation or scale. Multiple issues present simultaneously.
Address voltage first: verify line voltage at the unit. Then acid wash the cell and retest. If both issues persist, professional service is recommended.
Salt concentration has dropped below the minimum operating threshold of 2,000 ppm (2.0 gpl). The unit will reduce or stop chlorine production.
Dilution from rain, backwash, or water addition without adding salt. Splash-out on heavily used pools.
Add pool-grade salt to raise level to 3,000–3,500 ppm. Run the pump for 24 hours to dissolve and circulate before retesting.
Salt concentration exceeds the maximum safe operating level of 4,000 ppm (4.0 gpl). High salt accelerates cell wear and can cause corrosion to pool equipment.
Over-addition of salt, or testing error leading to unnecessary salt additions.
Partial drain and refill with fresh water. There is no chemical way to remove salt. Retest after refilling and circulating for several hours.
A service condition has been detected on the front (display) board. This may be caused by a wiring fault, loose connector, or board failure.
Loose ribbon cable between front and back boards, moisture intrusion, or component failure on the front PCB.
Power off, check all internal connections, and look for signs of corrosion or water damage. Reseat the ribbon cable. If code persists, the front board may need replacement.
A service condition has been detected on the back (power) board. The back board handles power conversion and cell drive circuits.
Power surge damage, failed relay or transformer on the back board, or overheating.
Inspect the back board for burnt components or swollen capacitors. Check incoming voltage. Back board replacement is typically required if components are visibly damaged.
The flow sensor is not detecting water flow or is disconnected. The AquaPure will not generate chlorine without confirmed flow to protect the cell.
Flow sensor cable unplugged, faulty flow sensor, pump not running, or extremely low flow rate from a dirty filter.
Verify the pump is running and flow sensor cable is connected. Clean or backwash the filter. Test the flow sensor with a multimeter if accessible. Replace sensor if faulty.
The incoming line voltage is below the minimum threshold for safe operation. The unit will reduce or halt chlorine production to protect internal components.
Undersized wiring run, shared circuit with heavy loads (pump, heater), or utility voltage drop.
Measure voltage at the unit terminals with a multimeter. Should be 110–130V (120V models) or 210–250V (240V models). Consult an electrician for dedicated circuit or wire gauge upgrade.
Water temperature exceeds 108°F. The AquaPure shuts down chlorine production to prevent damage to the cell and internal components at extreme temperatures.
Heater set too high, spa mode with extended heating, or sensor malfunction reporting incorrect temperature.
Lower heater setpoint. If the pool water is not actually above 108°F, the temperature sensor may be faulty and should be tested or replaced.
The flow sensor detects air in the line or salt is too low for the sensor to register properly. This condition can appear intermittently during pump priming.
Air trapped in the cell housing after pump prime, suction-side air leak, or salt below 1,500 ppm.
Bleed air from the system by opening the air relief valve on the filter. Check for suction leaks at the pump lid, valves, and pipe fittings. Test and adjust salt level.
Internal sensor or temperature probe failures detected by the diagnostic system. These codes generate visible Level 1 codes 172 (flow sensor) or 175 (air lock / low salinity) on the display. Professional diagnosis is required.
Failed thermistor, corroded sensor connections, water intrusion into sensor housing, or sensor cable damage.
Professional service required. Sensor replacement, wiring inspection, and board-level testing needed. Do not attempt to bypass sensor circuits.
Internal power supply or voltage regulation failures. These codes generate visible Level 1 codes 173 (low VAC) or 170 (front board) on the display. The power conversion circuitry on the back board may be failing.
Failed transformer, blown fuse on the back board, power surge damage, or degraded voltage regulator.
Professional service required. Back board replacement is common for these codes. Verify incoming line voltage is correct before replacing the board.
Relay switching or cell current delivery faults detected at the board level. These codes generate visible Level 1 codes 170 (front board) or 171 (back board) on the display. The relay that drives current to the cell may be stuck or failed.
Welded relay contacts, failed MOSFET or transistor on the drive circuit, or cell short circuit causing relay damage.
Professional service required. Test the cell independently. If cell is good, the back board relay circuit needs repair or board replacement.
Combined board and cell diagnostic failures. These codes generate visible Level 1 codes 170 (front board) or 125 (cell needs cleaning) on the display. Both the cell and the control board may have issues.
Cell and board degradation occurring simultaneously, or a cell failure causing secondary board damage.
Professional service required. Test the cell and boards independently. In many cases, both the cell and at least one board need replacement.
An external automation system (such as AquaLink) has sent a command to shut off chlorine production. This is normal when the system is controlled externally.
The AquaPure is receiving a shutoff signal from an external controller. Chlorine production is paused by design.
Check your automation system settings. If you want the AquaPure to produce chlorine, enable it from the external controller or disconnect external control.
Water temperature is below 54°F. The AquaPure automatically suspends chlorine production at low temperatures to protect the cell. This is normal winter behavior.
Protective cold-water shutoff. The cell will not generate chlorine below this threshold. Chlorine demand is also very low at these temperatures.
No action needed. The unit will resume automatically when water warms above 54°F. Supplement with liquid chlorine if needed during cold months.
The unit is running in boost/superchlorinate mode at 100% output for up to 24 hours. The countdown number shows remaining hours. Used to quickly raise chlorine levels after heavy use or algae treatment.
Boost mode was manually activated. The unit runs at full output regardless of the normal output % setting until the timer expires.
Normal operation. The unit will return to its regular output setting after the 24-hour period. Test chlorine level after boost completes. You can cancel boost mode from the control panel.
An input value (typically salt or temperature) has exceeded the maximum measurable range of the sensor. The actual value is higher than the display can show.
A sensor reading is pegged at maximum. Most commonly seen with extremely high salt levels or a sensor fault.
Test salt and temperature independently with a separate instrument. If salt is extremely high, dilute. If readings are normal, the sensor or its wiring may be faulty.
The AquaPure is connected to and being controlled by a Jandy AquaLink RS automation system. Output settings and on/off control come from the AquaLink.
Normal status when AquaLink RS is installed. The AquaPure’s local controls may be overridden by the automation system.
No action needed. Adjust output % and scheduling from the AquaLink RS control panel or iAquaLink app. To use standalone mode, disconnect the RS cable.
Boost/superchlorinate mode has been activated through the AquaLink RS automation system. The unit runs at 100% output for up to 24 hours as commanded by the automation.
AquaLink RS triggered a boost cycle. Same as local boost mode but initiated remotely through automation.
Normal operation. Cancel from the AquaLink RS panel or iAquaLink app if not desired. Unit returns to normal output after the boost period.
Estimate remaining cell life based on your AquaPure model, usage patterns, and water chemistry.
Your pool size in gallons
Your typical chlorinator output percentage
Cell only generates when the pump is running
How many months the cell has been installed
Optimal: 3,000–3,500 ppm
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of estimated life remaining
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The Jandy AquaPure salt chlorine generator produces chlorine through electrolysis as pool water flows over coated titanium plates inside the cell. Over time, these plates degrade from the electrolysis process, scaling, and water chemistry conditions. The rate of degradation depends heavily on how hard the cell works, how well the water is balanced, and how often the cell is cleaned.
Jandy rates the AquaPure 700 cell at approximately 10,000 hours of operation and the AquaPure 1400 at approximately 10,000 hours. With typical residential usage of 8 hours per day at 50% output, this translates to roughly 5–7 years of service. Poor water chemistry, high output settings, or inadequate maintenance can reduce that to 3–4 years.
The key difference between the two models is chlorine production capacity:
Using a larger model on a smaller pool allows you to run at lower output percentages, which extends cell life significantly.
The AquaPure uses a two-tier service code system. Level 1 codes (120–175) display directly and indicate conditions that pool owners or service technicians can often resolve: low salt, flow issues, cell cleaning, and voltage problems. Level 2 codes (180–194) represent internal diagnostic failures that generate a corresponding Level 1 code on the display. Level 2 codes require professional equipment and board-level knowledge to diagnose.
Letter codes (EC, Lo, bo, HH, JA, Jb G) are status indicators rather than error conditions. They tell you what the unit is doing, not that something is wrong.
The AquaPure operates in the 3,000–3,500 ppm (3.0–3.5 gpl) range. It will display a low salt warning (code 144) below 2,000 ppm and a high salt warning (code 145) above 4,000 ppm. The ideal target is 3,200 ppm. Always test salt independently with a test strip or photometer rather than relying solely on the unit's built-in reading.
Signs of a failing cell include: persistent service codes 120, 121, or 123 even after cleaning; chlorine production that drops despite normal salt and output settings; visible plate erosion (black or flaking coating) when inspecting the cell; and the unit unable to maintain adequate chlorine levels at high output. If the cell is more than 5 years old and showing these symptoms, replacement is likely needed.
Yes. The AquaPure operates fully in standalone mode. When connected to AquaLink RS, the automation system controls output % and on/off scheduling. The "JA" display code indicates AquaLink is connected and controlling the unit. To use standalone mode, simply disconnect the RS communication cable from the AquaPure.
Boost mode (displayed as "bo" with a countdown) runs the cell at 100% output for up to 24 hours. It is designed for situations where you need to quickly raise chlorine levels — after a pool party, heavy rain, or the beginning of an algae bloom. The unit automatically returns to its normal output setting after the boost period expires. Frequent use of boost mode will shorten cell life.
The "Lo" code activates when water temperature drops below 54°F. In many regions, this happens in late fall or early spring even when air temperatures are mild. The sensor reads water temperature, not air temperature. If the reading seems incorrect (pool water is clearly warmer than 54°F), the temperature sensor may be faulty and should be tested with a separate thermometer for comparison.
Replacement AquaPure cells typically cost $400–$800 depending on the model (700 or 1400) and supplier. The control unit and electronics can be reused as long as they are functioning properly. Replacing just the cell is always the most cost-effective approach unless the boards are also showing faults (Level 2 codes).
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