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8
Errors, malfunctions and messages
CAUTION!
Electrostatic charges can lead to voltage arcing
that can destroy the electronic components.
● Before touching the control panel PCB,
ensure potential equalisation.
8.1 Recognising errors, correcting
malfunctions
The Daikin Altherma M ECH
– signals an error by means of the background of the display
lighting up red and shows an error code on the display (see
tab. 8-2).
– shows information messages regarding the operating status
(not signalled by red background lighting).
An integrated protocol saves up to 15 error or other operating
status information messages that last occurred.
Depending on the operating mode, messages are also forwarded
to connected room stations or room thermostats.
8.1.1 Current error display
E 75
1
2
Inside Unit::
Boiler
3
Address::
0
1
Error message as code (see tab. 8-2)
2
Location information (device) of the detected fault
3
Data bus address of the device that caused the fault
Fig. 8-1
Displays an active error message (controller fault)
1
E 9001/80
2
Fault T-return
3
Inside Unit::
Heating Module
4
Address::
0
1
Error message as code (see tab. 8-2)
2
Error message as plain text (see tab. 8-2)
3
Location information (device) of the detected fault
4
Data bus address of the device that caused the fault
Fig. 8-2
Display of a current error message (heat pump fault)
8.1.2 Reading out the protocol
The protocol can be read out in the "Special Level" (see fig. 8-3).
The last received (latest) message is in the first position. All other
previous messages are then pushed backwards by one place
when a new entry is made. The 15th message is deleted on
arrival of a new message.
Daikin Altherma M ECH
O
2
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
O's electronic controller:
2
8
x
Errors, malfunctions and messages
Special Level
Manual Operation
FA failure
Special Level
FA failure
E75
Protocol
Timeprog Reset
Fig. 8-3
Reading the protocol
8.1.3 Troubleshooting
Information messages that are displayed without red back-
lighting, normally result in no permanent limitations on the
operation of the Daikin Altherma M ECH
Messages that are displayed with an error code E.... and red
back-lighting required error correction by an authorised and
trained expert heating technician.
For information on warning messages, see chap. 8.3.
● Detecting and remedying the cause of the malfunction.
– Contactor triggered:
Nothing shown on the display in the controller. Ascertain
cause of triggering the contactor and remedy fault. Start the
system again.
When the cause has been eliminated, the system will con-
tinue to operate as normal.
– Contactor not triggered:
a) No error codes are shown, but the system is not working
properly. Search for and rectify faults (see chap. 8.2).
Once the cause has been eliminated, the system contin-
ues to work normally.
b) Error codes are displayed as long as fault conditions are
present. Search for and rectify faults (see chap. 8.3). If the
fault message is still displayed after the cause of the fault
has been corrected, the system must be disconnected
from the power supply for at least 10 in order to unlock it.
Once the cause has been eliminated, the system contin-
ues to work normally.
Read Protocol
Protocol
E75
E75
Inside
Unit::
Boiler
Address::
0
O.
2
Installation and maintenance instructions
45
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