168
Troubleshooting
Error
code
Malfunctioning
or protection
Cause of the problem and corrective action
E8 Water flow-rate error.
Check that all shut-o valves in the water circuit are fully open.
• Check that the water filter is clean.
• See paragraph “6.7 Filling / topping up with water” on page
47.
• Check that there is no air in the system; vent the system if
necessary.
• Check that the water pressure is sucient on the pressure
gauge. The water pressure must be >1 bar.
• Check that the pump speed is set to the maximum value.
• Check that the expansion tank is intact.
• Check that the resistance characteristic of the water circuit is not
too high for the pump.
• If this error occurs during the defrosting function (during room
heating or domestic hot water heating), check that the power
supply to the backup heater is connected correctly and the
fuses have not blown.
• Check that the pump fuse and the PCB fuse have not blown.
E9 Th suction pipe sensor error.
• The Th sensor connector is loose. Reconnect it.
• The Th sensor connector is wet or contains water. Expel the
water and dry the connector. Apply a waterproof adhesive.
• Th sensor error, replace it.
EA
Tp discharge temperature
sensor error.
• The Tp sensor connector is loose. Reconnect it.
• The Tp sensor connector is wet or contains water. Expel the
water and dry the connector. Apply a waterproof adhesive.
• Tp sensor error, replace it.
Eb
Solar panel sensor error
(Tsolar).
• The sensor connector is loose. Reconnect it.
• The sensor connector is wet or contains water. Expel the water
and dry the connector. Apply a waterproof adhesive.
• Sensor error, replace it.
Ed
Tw_in entering water
temperature sensor error.
• The Tw_in sensor connector is loose. Reconnect it.
• The Tw_in sensor connector is wet or contains water. Expel the
water and dry the connector. Apply a waterproof adhesive.
• Tw_in sensor error, replace it.
EE
EEPROM control board main
hydraulic module control
board failure.
• EEprom parameter error, rewrite EEprom data.
• EEprom chips are faulty, replace with a new EEprom.
• Main hydraulic module control board is faulty, replace with a new
PCB.
bH PED board error.
• Switch o the power and switch on again after 5 minutes; check
if everything is OK.
• Replace the board, switch on again and check if everything is
OK.
• Replace the IPM module board.
H0
Communication error
between the main PCB B
control board and the main
hydraulic module control
board.
• The cable is disconnected between the main PCB B control
board and the main hydraulic module control board. Connect
the cable.
• The sequence of the communication wires is not correct.
Reconnect the wires in the correct sequence.
• If there is a high magnetic field or high-power interference, e.g.
lifts, large power transformers, etc. Add a barrier to protect the
unit or move the unit to another location.
H1
Communication error
between PCB A inverter
module and the main PCB B
control board.
• Check that the power supply is connected to the PCB and
secondary board. Check whether the PCB indicator light is on or
o. If it is switched o, reconnect the power cables.
• If it is switched on, check the electrical connections between the
main PCB and the secondary PCB. If the wire is loose or broken,
reconnect it or replace it.
• Replace the main PCB and the secondary board.
To Next Page
Loading...
Need help?
General