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6. APPENDIX (continued)
Problem
Flow sensor fault
Water outlet temperature fault
Input/Output temperature difference
> 13°C
Antifreeze protection Cold mode
Communication problem
Level 1 antifreeze protection
Level 2 antifreeze protection
DC1 fan motor fault
The heat pump does not start
Exterior temperature too low
Pressure sensor fault
44
Error
Description
codes
E03
The sensor is open or has short-circuited.
Applies only in Cold mode, Water outlet
E05
temperature < 4°C
E06
Applicable in Cold mode only
E07
Water output temperature < 4°C
No communication between the printed
E08
circuit board and the user interface
2°< Water temperature < 4°
E19
and Air temperature < 0°
Water temperature < 2°
E29
and Air temperature < 0°
F031 Motor jammed or faulty connection
F08
Possibly an inversion or lack of phase
Outdoor temperature too low,
TP
< H34 (-15°C fault)
PP
The sensor is open or short-circuiting
Solution
Check the AIN2 connections on the card
or replace the sensor
Lack of water, check the filtration pump
operation
Check the stop valve opening
Check the by-pass adjustment
Stop the heat pump, serviceability limit
reached
Lack of water, check the filtration pump
operation
Check the stop valve opening
Check the by-pass adjustment
Check the red AIN7 connector on
the board and measure the sensor's
resistance; if it is under 100 Ω or over
500 kΩ, replace it.
Stop the heat pump, drain the
condenser, high risk of it freezing.
Check the connectors - see the wiring
diagram
Stop heat pump operation, empty the
condenser to avoid freezing, by default
the heat pump starts the filtration pump
to avoid icing over
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.
Check
free
rotation;
check
connectors; replace the motor
Reverse two phases on the R-S-T
terminal block.
Check the connection and tightness of
the phases.
Check the AIN9 connector on the board
and measure the sensor's resistance;
if it is under 100 Ω or over 500 kΩ,
replace it.
Check the value of parameter H34
Check the connections see electrical
diagram
CN1
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