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8
x
Errors, malfunctions and messages
Code
Malfunction /
error message
Display Internal
E9031
L5
E9032
L8
Electrical defect
E9033
L9
E9034
LC
Circuit board
E9035
P1
defective
E9036
P4
Electrical defect
E9037
PJ
Setting output
E9038
U0
Coolant leak
E9039
U2
Under/over voltage
Installation and maintenance instructions
54
Component/
Designation
a) If the fault occurs <15x, the functional safety of the Altherma M
b) If the fault occurs 15x, it is locked and may have the following
Electrical components
overvoltage fault
– Refrigerant compressor defective.
– Inverter circuit board in the heat pump outdoor unit defective.
– Refrigerant compressor blocked or defective.
– Pressure difference between high and low pressure side too
– Service valves in the heat pump outdoor unit not open.
Electrical components
Communication error - internal communication in the heat pump out-
door unit disturbed.
– Electromagnetic influences.
– Main circuit board in the heat pump outdoor unit defective.
– Inverter circuit board in the heat pump outdoor unit defective.
– Fan motor defective.
– Wiring, poor contact.
– No supply voltage from the mains connection.
Inverter circuit board in
– Inverter circuit board in the heat pump outdoor unit defective.
the heat pump outdoor
unit
Overtemperature in the heat pump outdoor unit
Temperature sensor
– Inverter circuit board in the heat pump outdoor unit defective.
R10T on inverter circuit
– Temperature sensor on inverter circuit board defective, plug con-
board in the heat pump
outdoor unit
Output setting for heat
● Contact a Daikin service technician.
pump outdoor unit incor-
rect
Refrigerant loss.
Sensors and parameter
– Refrigerant quantity too low. See fault code E9015 / E4.
settings in the heat
– Blockage or leak in refrigerant line.
pump outdoor unit
Mains voltage outside of the permissible range
– Sporadic fault shortly after a power failure.
– Inverter circuit board in the heat pump outdoor unit defective.
Causes and possible fault elimination
ECH
O is still guaranteed.
2
Sporadic message during continuous self-monitoring by the
device.
● No further measures are required.
causes:
– Current mains overvoltage.
– Refrigerant compressor blocked or defective.
– Inverter circuit board in the heat pump outdoor unit defec-
tive.
– Wiring, poor contact.
– Service valves in the heat pump outdoor unit not open.
● Check, eliminate cause, replace.
● If necessary, contact a Daikin service technician.
● Check, replace.
● If necessary, contact a Daikin service technician.
high before starting refrigerant compressor.
● Check, eliminate cause, replace.
● If necessary, contact a Daikin service technician.
● Perform reset.
● Check, eliminate cause, replace.
● If necessary, contact a Daikin service technician.
● Check, eliminate cause, replace.
● If necessary, contact a Daikin service technician.
nection X111A not correct.
● Check, eliminate cause, replace.
● If necessary, contact a Daikin service technician.
● Check, eliminate cause, top up refrigerant.
● No fault elimination necessary.
● Check, replace.
● If necessary, contact a Daikin service technician.
Daikin Altherma M ECH
O
2
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
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