Jandy AquaPure Service Codes: Complete Reference Table

How Service Codes Work

When the AquaPure detects a problem, the SERVICE indicator light on the user interface turns on and a 3-digit code appears on the LCD. Codes display twice per minute with an audible alarm beep once per hour. Multiple codes can be present simultaneously; the display cycles through them.

Level 2 codes often generate a corresponding Level 1 code. For example, code 180 (heated sensor element not heating) also generates code 172 (flow sensor service). When you see a Level 1 code, there may be an underlying Level 2 code that a tech can retrieve by monitoring the display cycle.

To silence the alarm temporarily, press and hold the SALINITY button (C) for 5 seconds. The alarm can be permanently disabled by removing the J2 jumper on the Power Interface Board. The alarm volume can also be adjusted by holding the TEMPERATURE button (D) for 15 seconds.

Level 1 Service Codes — Cell Current

Code	Possible Cause	Corrective Action
120	Low current in forward direction to cell	Clean cell if necessary. Check DC cord connection.
121	Low current in reverse direction to cell	Clean cell if necessary. Check DC cord connection.
123	Extremely low current to cell	Clean or replace cell. Check DC cord connection.
124	Higher than normal current to cell	Contact a pool professional. May indicate backboard or cell issue.
125	Cell needs to be cleaned	Remove and acid wash cell. See cell cleaning guide.

Level 1 Service Codes — Low Voltage / Combined

Code	Possible Cause	Corrective Action
126	Low current in forward direction AND VAC input voltage below 100/200 VAC	Contact a pool professional. Verify AC wiring configuration.
127	Low current in reverse direction AND VAC input voltage below 100/200 VAC	Contact a pool professional. Verify AC wiring configuration.

Level 1 Service Codes — Salinity

Code	Possible Cause	Corrective Action
144	Low salinity (below 2.0 gpl). Cell production disabled.	Add salt to pool to achieve 3.0 gpl. See low salt guide.
145	High salinity (above 4.0 gpl). Cell production disabled.	Partially drain pool and dilute with fresh water until salinity returns to 3.0-3.5 gpl. See high salt guide.

Level 1 Service Codes — Board, Sensor, Voltage, Temperature

Code	Possible Cause	Corrective Action
170	Front board service condition or unit not correctly wired to 120 VAC	Contact a pool professional.
171	Backboard service condition	Contact a pool professional.
172	Flow sensor service condition or flow sensor is unplugged	Check sensor connection. Clean sensor. See flow sensor guide.
173	Low VAC input voltage; on-board power supply not regulated; or unit not correctly wired	Verify AC wiring matches available voltage. See low voltage guide.
174	Pool temperature too high for AquaPure operation (>108°F / 42°C)	Reduce water temperature. See high temperature guide.
175	Flow sensor air lock condition or very low salinity	Verify proper sensor installation. Check salinity with independent test. Add salt as necessary.

Level 2 Service Codes — Professional Only

Code	Possible Cause	Generates
180	Heated sensor element not heating	Code 172
181	Flow sensor temperature sensor failure	Code 172
182	Salinity sensor sees less than 0.2 gpl of salt; no salt in pool or sensor air locked	Code 175
183-186	Flow/salinity sensor temperature probe error codes	Code 172
187	Front board power supply either too low or too high	Code 173 (if 188 present) or Code 170 (if 188 absent)
188	VAC input voltage is too low	Code 173 (if 187 present)
189	Relay not conducting in the forward direction	Code 171
190	Relay not conducting in the reverse direction	Code 171
191	High cell current (upper limit of A/D converter) and cell voltage below 19V	Code 170
192	High cell current and cell voltage below 19V	Code 171
193	Measured significant cell current when SCRs were turned off	Code 170
194	Cell current is 85% lower than desired and cell voltage above 19V; OR salinity invalid due to out-of-range measurements from front board error	Code 125 or Code 170

Letter Codes — Status Indicators

These are not error codes. They indicate the current operating state of the AquaPure system.

Code	Condition	Meaning
EC	External Control	ORP unit or external controller has shut off chlorine production.
Lo	Low Temperature Cutoff	Pool water temperature is below 54°F (12.2°C). Chlorine production stopped automatically.
bo 60	Boost Mode	Unit operating at 100% production for 24 run-time hours. Counter shows remaining hours.
HH	High-High	Input has exceeded maximum measurement range. Salinity is above 4.5-6.5 gpl depending on temperature.
JA	AquaLink RS Online	AquaLink RS automation is controlling the AquaPure and setting output percentages.
Jb G	Boost (AquaLink RS Interface)	AquaLink RS is controlling the AquaPure and Boost mode is active.