Check System
Zodiac / Jandy Pool Equipment
Severity: ModerateWhat Does This Error Mean?
Check System is a general diagnostic alert on Zodiac/Jandy pool equipment. It means the system detected a fault that needs attention. Check the display for a more specific error code or description.
Affected Models
- Jandy AquaLink
- Jandy iAqualink
- Zodiac AquaPure Salt System
- Jandy JXi Heater
- Jandy VS FloPro Pump
Common Causes
- Communication error between equipment components
- Sensor reading out of range
- Flow switch fault
- Salt cell needs attention
- Equipment firmware needs updating
How to Fix It
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Check the display for a specific sub-code.
Check System is a general alert. The display usually shows a more specific code or message below it. This specific code identifies the actual problem.
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Power cycle the system.
Turn off all equipment at the breaker, wait 30 seconds, turn back on. This resets communication between components.
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Check all equipment connections.
Jandy systems use RS-485 communication between devices. A loose communication cable between the controller and equipment causes Check System.
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Check for firmware updates via the iAqualink app.
Outdated firmware can cause communication errors between components.
Frequently Asked Questions
What is the AquaLink system?
AquaLink is Jandy's pool automation system. It controls the pump, heater, chlorinator, lights, and valves from one controller. The iAqualink version adds phone app control.
Can I control my Jandy system from my phone?
Yes, with iAqualink. It requires an iAqualink web connect device connected to your AquaLink controller and your home WiFi.