Daikin EKHWMX500CA [55/68] X errors malfunctions and messages

Daikin EKHWMXB300CA [55/68] X errors malfunctions and messages
8 x Errors, malfunctions and messages
Daikin Altherma M ECH
2
O
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
Installation and maintenance instructions
55
E9041 U4
Transmission fault Electrical components
Communication between heat pump outdoor unit and heat pump
indoor unit disturbed.
Wiring or connections, poor contact.
No heat pump outdoor unit connected.
Printed circuit board A1P (outdoor unit) defective.
Main circuit board in the heat pump outdoor unit defective.
Check, replace.
E9042 U5
Communication between printed circuit board A1P (outdoor unit)
and RoCon
BM2C disturbed.
See fault code E200.
E9043 U7
Communication between main circuit board and inverter circuit
board in the heat pump outdoor unit disturbed.
Main circuit board in the heat pump outdoor unit defective.
Inverter circuit board in the heat pump outdoor unit defective.
Wiring, poor contact.
Check, eliminate cause, replace.
E9044 UA
Configuration of printed circuit board A1P (outdoor unit) does not
match the heat pump outdoor unit
Replace printed circuit board A1P.
If necessary, contact a Daikin service technician.
E9045 AJ
heating time (hot
water)
Software
WW heating > 6 hours
Check the heating element.
Check whether the power supply meets the regulations. Check
for frequency fluctuations.
Check the fuses on the printed circuit boards.
Check WW consumption (poss. too high).
Check the building's WW tap.
Confirm that the software and EEPROM on the hydro printed
circuit board match.
E9046 E6
compressor start-
up
Software
System detects an abnormal electricity wave shape 16 times in
5
min
Check whether the power supply meets the regulations. Check
for frequency fluctuations.
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.
After resetting the power supply, check whether the error occurs
when the compressor is not in operation: check the expansion
valve.
E9047 E8 overvoltage Software
System detects an overcurrent of > 20 A to the compressor for
>
2.5 seconds 16 times in 5 min
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 power transistor.
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 whether the power supply meets the regulations. Check
for frequency fluctuations.
Code Malfunction /
error message
Component/
Designation
Causes and possible fault elimination
Display Internal

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