8
Faults and malfunctions
Installation and maintenance instructions
40
Daikin Altherma EHS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1444099_01 – 11/2018 – EN
8
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 potential
equalisation.
8.1
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.
8.2
Overview of possible malfunctions
Malfunction
Possible cause
Possible solution
System not working
(nothing on the display,
operation LED on Ro-
Con BM2C off)
No mains voltage
▪ Switch on the system's external main switch.
▪ Switch on system fuse(s).
▪ Replace system fuse(s).
Switching time pro-
grams are not operating
or programmed switch-
ing times are carried
out at the wrong time.
The date and time are not set correctly.
▪ Set the date.
▪ Set the time.
▪ Check the weekday to switching time assignment.
Incorrect operating mode set.
▪ Set the "Automatic 1" or "Automatic 2" operating mode
During a switching time the user made a manual set-
ting (e.g. changed the target temperature, changed
the operating mode)
1
Select the "Operating mode" menu [→ Main menu → Oper-
ating mode].
2
Select the correct operating mode.
The controller does not
respond to inputs
The controller's operating system has crashed.
▪ RESET the controller. To do this, disconnect the system from
the power supply for at least 10 s and then switch on again.
Operating data are not
updated
The controller's operating system has crashed.
▪ RESET the controller. To do this, disconnect the system from
the power supply for at least 10 s and then switch on again.
Heating does not warm
up
Requirement heating mode shut off (e.g. switching
time program is in the economy phase, outside tem-
perature is too high, parameters for optional backup
heater (EKBUxx) incorrectly set, requirement for hot
water active)
▪ Check the operating mode setting.
▪ Check the request parameters.
▪ Check the date, time and switching time program settings on
the controller.
Refrigerant compressor is not working.
▪ With backup heater (EKBUxx) installed:
▪ Check that the backup heater heats the return flow temperat-
ure to at least 15 °C (at a low return flow temperature, the
heat pump uses the backup heater first to achieve this min-
imum return flow temperature).
▪ Check mains supply of the backup heater (EKBUxx).
▪ Thermal contactor (STB) on the backup heater (EKBUxx) has
triggered. Unlock.
The system is in the "Cooling" operating mode.
▪ Switch the operating mode to "Heating".
Settings for low rate mains connection do not corres-
pond to settings for electrical connections.
▪ 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 low rate mains connection.
▪ The parameter [Smart grid] is active and the connections are
set incorrectly.
The electricity company has sent the peak rate sig-
nal.
▪ Wait for the repeat off-peak rate signal which reactivates the
power supply.
Содержание Altherma 3 ECH2O
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