Daikin EHFH03S18DJ3V [10/12] Troubleshooting
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Daikin EHFH03S18DJ3V [10/12] Troubleshooting

Daikin EHFH03S18DJ3V [10/12] Troubleshooting
6 Troubleshooting
Operation manual
10
EHFH03S18DJ3V
Daikin Altherma 3 R F
4P596804-1 – 2019.10
WARNING
The refrigerant inside the unit is mildly flammable, but
normally does NOT leak. If the refrigerant leaks in the
room and comes in contact with fire from a burner, a
heater, or a cooker, this may result in fire, or the formation
of a harmful gas.
Turn off any combustible heating devices, ventilate the
room, and contact the dealer where you purchased the
unit.
Do NOT use the unit until a service person confirms that
the part from which the refrigerant leaked has been
repaired.
5.2 To find the contact/helpdesk
number
Prerequisite: You switched the permission level to Advanced end
user.
1 Go to [6.3.2]:
> Information > Error handling >
Contact/helpdesk number.
6 Troubleshooting
6.1 To check the error history
Prerequisite: Only available if
is displayed on the home pages.
1 Go to [6.3.1]:
> Information > Error handling > Error
history.
6.2 Symptom: You are feeling too cold
(hot) in your living room
Possible cause Corrective action
The desired room temperature is
too low (high).
Increase (decrease) the desired
room temperature. See
"3.3.2Room thermostat control -
Using the room temperature
home pages"[47].
If the problem recurs daily, do
one of the following:
▪ Increase (decrease) the room
temperature preset value. See
the user reference guide.
▪ Adjust the room temperature
schedule. See "3.5Schedules:
Example"[48].
The desired room temperature
cannot be reached.
Increase the desired leaving
water temperature in accordance
with the heat emitter type. See
"3.3.3Room thermostat control -
Using the leaving water
temperature home pages"[48].
The weather-dependent curve is
set incorrectly.
Adjust the weather-dependent
curve. See the user reference
guide.
6.3 Symptom: The water at the tap is
too cold
Possible cause Corrective action
You ran out of domestic hot
water because of unusual high
consumption.
If you immediately need domestic
hot water, activate the DHWtank
booster mode. However, this
consumes extra energy. See
"3.4.5Using the DHWtank
booster mode"[48].
If you can wait, overrule
(increase) the active or next
scheduled desired temperature
so that more hot water will be
produced exceptionally. See "To
read out and overrule the active
or next scheduled desired
temperature (in scheduled mode
or scheduled + reheat
mode)"[48].
If the problem recurs daily, do
one of the following:
▪ Increase the DHW tank
temperature preset value. See
the user reference guide.
▪ Adjust the DHW tank
temperature schedule.
Example: Program to
additionally heat up the
DHW tank to a preset value
(Storage eco = lower tank
temperature) during the day.
See "3.5 Schedules:
Example"[48].
The desired DHWtank
temperature is too low.
6.4 Symptom: Heat pump failure
When the heat pump fails to operate, the backup heater can serve
as an emergency heater and either automatically or non-
automatically take over the heat load.
▪ When auto emergency is activated and a heat pump failure
occurs, the backup heater will automatically take over the heat
load.
▪ When auto emergency is not activated and a heat pump failure
occurs, the domestic hot water and space heating operations will
stop and need to be recovered manually. The user interface will
then ask you to confirm whether the backup heater can take over
the heat load or not.
When the heat pump fails,
will appear on the user interface.
Possible cause Corrective action
Heat pump is damaged. ▪ Press to view a description
of the problem.
▪ Press
again.
▪ Select
to allow the backup
heater to take over the heat
load.
▪ Call your local dealer to get
the heat pump fixed.
INFORMATION
When the backup heater takes over the heat load,
electricity consumption will be considerably higher.

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