Panasonic PAW-HPM 1 User Manual

39Chapter 4 Appendix4.1 The displaying of error messagesHPM recognises a number of trouble indications and errors. You will see them whenthe error message alternates with the defaukt display. The following short text can beseen:FP-system Frost protection for the system, flow temperature below frost limitFP-stor Frost protection for storage tank, storage tank temperature below frost limitBP-frRoom Building protection, room temperature below frost limitBP-heRoom Building protection, room temperature above heat limituLiColl Solar collector above upper limituLiStor Storage tank temperature above upper limituLiFlow Flow temperature above upper limitTI-system Trouble indication, system: error message input activeTI-input Trouble indication input (short or broken cable)thermDes Thermal disinfection could not be finishedXw-loadFl Loading flow temperature difference between current value and setpoint is above max.control deviationXw-room Loading flow temperature difference between current value and setpoint is above max.control deviationXw-buffer Storage tank temperature difference between current value and setpoint is above max.control deviationXw-bufferVL Storage tank flow temperature difference between current value and setpoint is abovemax. control deviationXw-flow Flow temperature difference between current value and setpoint is above max. controldeviationXw-contr Temperature difference of control sensor between current value and setpoint is abovemax. control deviationThese error messages do not have to be acknowledged; the error message willdisappear automatically as soon as the problem has been solved.Furthermore, the error code sent to the HPM when it is connected via Bus will beshown in the display of the controller. Some of these errors must be acknowledged. Alist of all possible error messages of the heat pump are described in the operating andservice manual of the pump.