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Errors, malfunctions and messages
Installation and maintenance instructions
56
Daikin Altherma M ECH
2
O
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
E9048
EA
4-way valve
4-way valve
The following condition occurs for 10
min after operation for 5
min:
Heating: temperature of the condenser negative outlet water tem-
perature <
-10 °C
●
Check the thermistor for the outlet water in the heat exchanger.
●
Check the thermistor for the refrigerant fluid side.
●
Check whether the current flow LED flashes at regular intervals.
●
Check whether the correct replacement part has been installed.
●
Check whether the outer main conductor plate is receiving a
power supply.
●
Check the 4-way valve's coil/wiring harness.
●
Check the 4-way valve's body.
●
Check for insufficient refrigerant. Perform a leak test.
●
Check the quality of the refrigerant.
●
Check the shut-off valves.
●
Check whether the hydro printed circuit board is being supplied
with voltage.
E9049
F6
high pressure cool-
ing
Temperature sensor on
the evaporator
The temperature measured by the temperature sensor on the fin
heat exchanger exceeds 60 °C
●
Check whether the installation room meets the regulations.
●
Check the fan.
●
Check the fan motor's connection and wiring.
●
Check the expansion valve.
●
Check the outer inverter conductor plate.
●
Check whether the current flow LED flashes at regular intervals.
●
Check whether the correct replacement part has been installed.
●
Check whether the outer main conductor plate is receiving a
power supply.
●
Check the shut-off valves.
●
Check the heat exchanger.
●
Check the temperature sensor on the fin heat exchanger.
●
Check the quality of the refrigerant.
E9050
H0
Comfort Heating
Software
Power supply condition malfunction detected before or directly after
the compressor starts up
●
Check the compressor.
●
Check the compressor's connection and wiring.
●
Check the operation of the expansion valve (fluid return flow).
●
Check the refrigerant filling capacity, and check for leaks.
●
Check the outer inverter conductor plate.
●
Check whether the current flow LED flashes at regular intervals.
●
Check whether the correct replacement part has been installed.
●
Check whether the outer main conductor plate is receiving a
power supply.
E9052
H8
compressor start-
up
Software
Compressor operating frequency below 55
Hz, voltage below 0.1
V
and input current below 0.5
A
●
Check the compressor.
●
Check the compressor's connection and wiring.
●
Check the operation of the expansion valve (fluid return flow).
●
Check the refrigerant filling capacity, and check for leaks.
●
Check whether the power supply meets the regulations. Check
for frequency fluctuations.
●
Check the outer inverter conductor plate.
●
Check whether the current flow LED flashes at regular intervals.
●
Check whether the correct replacement part has been installed.
Code
Malfunction /
error message
Component/
Designation
Causes and possible fault elimination
Display Internal