Fujitsu NEORE B User Manual Installation Instruction page 40

Errors
States and errors
Section - Status Errors
Code of states and errors - four-digit code (read from left)
1. digit: 1 - Freeze protection (output water temperature dropped below safe limits)
2 - Insufficient water flow (water flow dropped below safe limits)
3 - Outdoor unit disorder
4 - Low water pressure (water pressure dropped below 0,9 Bar)
5 - Faulty temperature sensor MX (communication unit)
2. digit: 1,2 - Faulty output water temperature sensor
3,4 - Faulty input water temperature sensor
3. digit: 1,2 - Faulty pool temperature sensor
3,4 - Faulty secondary circuit temperature sensor
4. digit: 1,2 - Faulty outdoor temperature sensor
3,4 - Faulty object temperature sensor
5,6 - Faulty DHW temperature sensor
7,8 - Faulty accumulatice tank temperature sensor
First two digits from left indicate critical error, in which is heat pump operation stopped or limited.
Autoreset - Function of error autoreset. If the error disappears, heat pump is again put into
operation. This could happen maximum 5 times, autoreset function is deactivated thereafter.
Error history- Error history records last 10 errors.
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