In this module, we’ll explore how to interpret ALPHA2 GO trend data. Identifying the root cause of issues in heating systems can be challenging. Without the right data, troubleshooting often involves guesswork. To help overcome this challenge, the Grundfos GO app provides trend data which allows you to analyse pump and system performance over time.

By tracking specific parameters, installers can spot inconsistencies, diagnose faults, and ensure optimal system efficiency. To get to the trend data, connect to the pump with the Grundfos GO app. Once in the dashboard, scroll down to trend data. When viewing the trend data in the app, you can analyse different performance parameters: Head and flow indicate the change in duty point over time.

On-cycle duration helps detect irregular circulator cycling patterns that may indicate system inefficiencies. Estimated media temperature monitors the temperature of the liquid. It can be used as a measurement when troubleshooting the system. By comparing data across multiple cycles, installers are provided with help identifying root causes behind an issue.

Unlike traditional logs, the Grundfos GO app does not use real-time timestamps. Instead, trend data is organised by on-cycle timestamps. An on-cycle starts when the pump turns on and ends when it turns off. If the pump runs continuously for more than 24 hours, a new on-cycle is registered even though the pump hasn’t turned off. The most recent on-cycle is labelled as Cycle 1. Older on-cycles move leftward as new ones are recorded.

Let’s look at common trend patterns and what they might indicate: If you notice a high head and low flow, this indicates an increase in system resistance.  There may be a blockage or a closed valve. Check for obstructions in the system.

Long on-cycles could suggest the system is struggling to meet demand.
If rooms feel cold, increasing flow or raising the supply temperature can help. A sudden drop in media temperature often points to a faulty heat source or stuck valve. Check the boiler temperature and inspect valves for blockages.

To further help installers track issues and performance, the event log in the Grundfos GO app records key pump events, including:
* Warnings
* Alarms
* System errors

Each event provides a brief description of the issue and, in some cases, recommended actions.

Installers can use this log to track recurring issues and determine if a problem is system-wide or pump-specific.

By analysing trend data and using the event log effectively, you can troubleshoot heating systems more efficiently, reduce callbacks, and ensure long-term performance optimisation.