Daikin Altherma M ECH2O Series Installation And Maintenance Instructions Manual page 57

Code Malfunction /
error message
Display Internal
E9053 JA
refrigerant pres-
sure sensor
E9054 JI
Pressure loss
W8006 —
warning
Water pressure in
W8007 — heating system too
high
Tab. 8-2 Fault codes on the Altherma M ECH
Observe maximum temperature sensor tightening
torque (see chap. 10.4 "Tightening torque").
Refer to the heat pump outdoor unit installation instruc-
tions for information on components in the refrigerant
circuit.
Daikin Altherma M ECH O
2
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
8
Component/
Designation
Pressure sensor detects an abnormal value for 3 minutes
(> 4.5 MPa or < -0.05 MPa)
● Check the pressure sensor.
Pressure sensor in the
● Check whether the current flow LED flashes at regular intervals.
outdoor unit
● Check whether the correct replacement part has been installed.
● Check whether the outer main conductor plate is receiving a
Warning message: Maximum permissible pressure drop exceeded.
Insufficient water in the heating system.
● Check heating system for leaks, top up water.
Warning message: water pressure has exceeded permissible maxi-
mum value.
Pressure sensor P
hyd
– Diaphragm expansion vessel defective or incorrect admission
– Parameter [Max Pressure] setting too low.
O controller
2
x Errors, malfunctions and messages
Causes and possible fault elimination
power supply.
pressure set.
● Check, replace.
● Set the parameter if necessary. If the setting is correct, drain
water to lower the system pressure.
Installation and maintenance instructions
57