Faults And Malfunctions; Troubleshooting; Overview Of Possible Malfunctions - Daikin Altherma 3 H HT ECH2 O Referenzhandbuch Für Den Monteur

7

Faults and malfunctions

7 Faults and malfunctions
DANGER: RISK OF ELECTROCUTION
Electrostatic charges can lead to voltage arcing that can
destroy the electronic components.
▪ Before touching the control panel PCB, ensure poten-
tial equalisation.
7.2

Overview of possible malfunctions

Fault
System not working No mains voltage
(nothing on the display,
operation LED on Ro-
Con BM2C off)
Switching time pro- The date and time are not set correctly.
grams are not operat-
ing or programmed
switching times are car-
Incorrect operating mode set.
ried out at the wrong
time.
During a switching time the user made a manual
setting (e.g. changed the target temperature,
changed the operating mode)
The controller does not The controller's operating system has crashed.
respond to inputs
Operating data are not The controller's operating system has crashed.
updated
Heating does not warm Requirement heating mode shut off (e.g. switch-
up ing time program is in the economy phase, out-
side temperature is too high, parameters for op-
tional backup heater (EKBUxx) incorrectly set, re-
quirement for hot water active)
Refrigerant compressor is not working.
The system is in the "Cooling" operating mode.
Settings for off-peak mains connection do not
correspond to settings for electrical connections.
The electricity company has sent the peak rate
signal.
Installer reference guide
36
Possible cause
7.1

Troubleshooting

The electronics of the indoor unit indicate an error by the status dis-
play lighting red, the error screen appearing on the display and the
error symbol appearing on the start screen.
Troubleshooting: Error code E90XX
An error reset can be performed. If the same error is displayed again
shortly, the cause of the error must be found and rectified by a spe-
cialist. In the meantime, emergency operation may be maintained.
Troubleshooting: Other error codes
The cause of the error must be found and rectified by a specialist. In
the meantime, emergency operation may be maintained.
Possible solution
▪ Switch on the system's external main switch.
▪ Switch on system fuse(s).
▪ Replace system fuse(s).
▪ Set the date.
▪ Set the time.
▪ Check the weekday to switching time assignment.
▪ Set "Automatic 1" or "Automatic 2" operating mode
1 Select "Operating mode" menu [→ Main menu → Operating
mode].
2 Select the correct operating mode.
▪ RESET the controller. To do this, disconnect the system from the
power supply for at least 10 s and then switch on again.
▪ RESET the controller. To do this, disconnect the system from the
power supply for at least 10 s and then switch on again.
▪ Check the operating mode setting.
▪ Check the request parameters.
▪ Check the date, time and switching time program settings on the
controller.
▪ With backup heater (EKBUxx) installed:
▪ Check that the backup heater heats the return flow temperature
to at least 15 °C (at a low return flow temperature, the heat pump
uses the backup heater first to achieve this minimum return flow
temperature).
▪ Check mains supply of the backup heater (EKBUxx).
▪ Thermal contactor (STB) on the backup heater (EKBUxx) has
triggered. Unlock.
▪ Switch the operating mode to "Heating".
▪ HT/NT function is active and the [HT/NT contact] parameter is set
incorrectly.
▪ Other configurations are also possible. However, these must
match the type of off-peak mains connection.
▪ The parameter [Smart grid] is active and the connections are set
incorrectly.
▪ Wait for the repeat off-peak rate signal which reactivates the
power supply.
Heat pump (indoor unit) with integrated heat accumulator
Daikin Altherma ETS(X/H)(B)-D
008.1447299_00 – 06/2019 – EN