Fujitsu Waterstage Heat Pumps
3 fault codes documented
Bell symbol
Bell symbol on display — General error
The display shows a bell symbol, indicating that an error has occurred in the heat pump system. This is a general error message that requires further investigation by a technician.
Error 370
Error 370 — Temporary communication loss after power cut
This error appears on the display if the electrical power supply to the heat pump was interrupted during operation. It indicates a temporary loss of communication between the outdoor and hydraulic units.
Key symbol
Key symbol on display — Service or special mode message
The display shows a key symbol, indicating either a service message requiring attention or that the unit is operating in a special mode. This is an informational or maintenance message, not necessarily a fault.