Troubleshooting; Symptom: You Are Feeling Too Cold (Hot) In Your Living Room; Symptom: The Water At The Tap Is Too Cold; Symptom: Heat Pump Failure - Daikin EHVH04SU18CB6W Operation Manuals

6 Troubleshooting

6 Troubleshooting
6.1 Symptom: You are feeling too cold
(hot) in your living room
Possible cause
The desired room temperature is
too low (high).
The desired room temperature
cannot be reached.
6.2 Symptom: The water at the tap is
too cold
Possible cause
You ran out of domestic hot
water because of unusual high
consumption.
The desired DHW tank
temperature is too low.
Operation manual
10
Corrective action
Increase (decrease) the desired
room temperature.
If the problem recurs daily, do
one of the following:
▪ Increase (decrease) the room
temperature preset value.
▪ Adjust the room temperature
schedule.
Increase the desired leaving
water temperature in accordance
with the heat emitter type.
Corrective action
If you immediately need domestic
hot water, activate the DHW tank
booster mode. However, this
consumes extra energy.
If you can wait, overrule
(increase) the active or next
scheduled desired temperature
so that more hot water will be
produced exceptionally.
If the problems recurs daily, do
one of the following:
▪ Increase the DHW tank
temperature preset value.
▪ 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.
6.3

Symptom: Heat pump failure

When the heat pump fails to operate, the backup heater and booster
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.
▪ The booster heater will automatically take over the domestic hot
water production.
▪ 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 or booster
heater can take over the heat load or not.
When the heat pump fails, will appear on the user interface.
Possible cause
Heat pump is damaged.
INFORMATION
When the backup heater or booster heater takes over the
heat load, electricity consumption will be considerably
higher.
7

Glossary

DHW = Domestic hot water
Hot water used, in any type of building, for domestic
purposes.
LWT = Leaving water temperature
Water temperature at the water outlet of the heat pump.
Corrective action
▪ 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.
EHVH04~16SU18+26CB6W
Daikin Altherma – Low temperature split
4P449982-1 – 2016.06