Error code
Uppvärmning maximum larm Maximum heating-flow-temperature alarm
Applies to 3 models
EX35, EX50, EX65
What this means
The configured maximum flow-temperature alarm limit has been exceeded, normally by 5 K above the maximum flow setting. Factory alarm limits are 45 °C for floor heating and 75 °C for radiator heating; poor circulation or an unsuitable heating circuit may be involved.
When to call a technician
This fault involves refrigerant, pressure, or electrical work that must be handled by a certified technician under EU F-gas rules. Do not attempt to open the refrigerant circuit, access mains wiring, or adjust pressure components yourself. Contact a qualified installer or servicer for this one.