A measured maintenance sequence covering airflow, water flow, condensate, antifreeze, controls and the refrigerant boundary.
Core idea
Good maintenance starts with symptoms, operating history and measured conditions. Outdoor-coil blockage, poor airflow, dirty strainers, trapped air, incorrect water flow, control settings and condensate problems can all reduce output without proving a refrigerant fault. Compare observations with the manufacturer’s service data before changing settings or parts.
What to recognise
- Isolate safely and protect against fan, electrical, hot-water and refrigerant hazards.
- Inspect airflow clearances, coil condition, fan, base and condensate or defrost drainage.
- Check system pressure, water flow, strainers, air, pump operation and visible leakage.
- Confirm antifreeze concentration and condition using the specified method where glycol is used.
- Review alarms, sensor readings, target temperatures, backup heat and operating history before resetting faults.
Apply it
A useful service record states the entering and leaving water temperatures, flow where available, outdoor condition, operating mode and any alarms. That makes later comparison possible. Repeatedly clearing an alarm without finding its cause can hide low flow, freezing risk or a failing component.
Keep the boundary clear
Cleaning an accessible coil or checking a water circuit does not authorise work on the refrigerant circuit or fixed electrical installation. Leak checking, refrigerant recovery and work with flammable refrigerants require the relevant competence, equipment and procedures. Follow the exact appliance instructions.
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