34
6. APPENDIX (continued)
Problem
Error
codes
Description Solution
Input/Output temperature difference
> 13°C
E06 Applicable in Cold mode only
Lack of water, check the filtration pump
operation
Check the stop valve opening
Check the by-pass adjustment
Antifreeze protection Cold mode E07 Water output temperature < 4°C
Stop the heat pump, empty the
condenser risk of freezing
Communication problem E08
No communication between the printed
circuit board and the user interface
Check the connectors - see the wiring
diagram
Level 1 antifreeze protection E19
2°< Water temperature < 4°
and Air temperature < 0°
Stop heat pump operation, empty the
condenser to avoid freezing, by default
the heat pump starts the filtration pump
to avoid icing over
Level 2 antifreeze protection E29
Water temperature < 2°
and Air temperature < 0°
Stop heat pump operation, empty the
condenser to avoid freezing, by default
the heat pump starts the filtration pump
and the heat pump to avoid icing over.
Fan motor fault F031 Motor jammed or faulty connection
Check free rotation; check CN97/DC
connectors; replace the motor
Fan motor fault F051 Faulty connection
Check the DCFAN/CN97 connector;
replace the motor
Exterior temperature too low TP Operating limit reached Stop the heat pump
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