Troubleshooting And Servicing; General Guidelines; General Symptoms - Daikin EKSOLHWAV1 Manuel D'installation Et D'utilisation

With above settings, the heating of the water by heat pump/booster
heater will be limited to the minimum required, and solar heat will be
stocked in the domestic hot water tank to the maximum.
Setting of the solar priority parameter
Simultaneous water heating by the sun and water heating by the heat
pump is not possible.
By default, heating of the tank by the heat pump has priority over
heating by the sun.
This means that, whenever there is a request of the domestic hot
water thermostat and domestic water heating is enabled (by the
schedule timer or domestic water heating ON/OFF button, refer to the
operation manual of the unit), heating will be done by the heat pump.
In case solar heating is busy, solar heating will be stopped.
This is to avoid shortage of domestic hot water in case the solar
radiation is very weak, or solar radiation only became high shortly
before domestic hot water demand is expected (e.g. on a cloudy
day).
This default setting can be changed, so that at all times, when solar
heat becomes available, domestic water heating by the heat pump
will be (if busy) interrupted and taken over by the sun.
In order to change this, put the field parameter [C-00] to 0. Refer to
the installation manual of the unit, paragraph "Field settings" to find
out how to access and change field parameters. [C-00] put to 0
means solar priority, [C-01] put to 1 means heat pump priority.
NOTE Be aware that setting this parameter to 0 might cause
insufficient warm water at the time of domestic hot
water demand during days with weak solar intensity.
If you are not sure about the availability of hot water,
check the domestic hot water temperature on the
controller (see operation manual of the unit) and if too
low, push the 'booster domestic hot water' button. This
will trigger domestic water heating by the heat pump
immediately.
NOTE The booster heater in the domestic hot water tank can
work independent from the solar heating or domestic
water heating by the heat pump.
For a detailed decision flow on domestic water heating
by solar kit or by heat pump, and/or booster heater,
refer to the annexes "Decision flow of heating the
domestic water by heat pump or by solar kit" on
page 12 and "Decision flow of heating the domestic
water by booster heater" on page 13.
Installation and operation manual
10
T
ROUBLESHOOTING AND SERVICING
This section provides useful information for diagnosing and
correcting certain troubles which may occur with the unit.

General guidelines

Before starting the troubleshooting procedure, carry out a thorough
visual inspection of the unit and look for obvious defects such as
loose connections or defective wiring.
Before contacting your local Daikin dealer, read this chapter carefully,
it will save you time and money.
When carrying out an inspection on the switch box of the
unit, always make sure the main switch of the unit is
switched off.
When a safety device was activated, stop the unit and find out why
the safety device was activated before resetting it. Under no
circumstances safety devices may be bridged or changed to a value
other than the factory setting. If the cause of the problem cannot be
found, call your local dealer.

General symptoms

Symptom 1: The pump of the solar pump station starts
operation, but the pump of the solar kit is not working.
POSSIBLE CAUSE
1 The tank has reached its Refer to "Thermal cut out" on page 3.
maximum allowed
temperature (see the
temperature reading on
the unit display)
2 The auxiliary contact Check the wiring.
from the solar pump
station to the unit is not
properly wired
3 The pump of the solar kit Check the wiring.
is not properly wired to
the unit through the tank
4 The priority for domestic Refer to "Setting of the solar priority
water heating is given to parameter" on page 10.
the heat pump
5 The thermal cut out of the Refer to error code AA in "Error codes" on
tank has operated page 11.
Symptom 2: There is a lot of sun intensity but the solar pump
station and solar kit pumps do not start.
POSSIBLE CAUSE
1 The maximum Check the domestic hot water temperature
temperature of the on the controller of the unit (refer to the
domestic hot water tank operation manual of the unit) and check the
is reached maximum temperature setting on your solar
pump station.
2 The outdoor unit is Refer to "Setting of the solar priority
heating up the domestic parameter" on page 10.
water tank, since the
priority for domestic
water heating is given to
the heat pump
Symptom 3: Only for EKHWSU
The pump of the solar pump station starts operation, but the
pump of the solar kit is not working.
POSSIBLE CAUSE
1 The temperature settings Refer to the wiring diagram in the domestic
of the domestic hot water hot water tank switch box and check the
tank thermostats were temperature settings.
lowered.
2 The 2-way valve remains Check the wiring.
closed. Refer to the wiring diagram in the domestic
hot water tank switch box and check the
temperature settings.
CORRECTIVE ACTION
CORRECTIVE ACTION
CORRECTIVE ACTION
EKSOLHWAV1
Solar kit for air to water heat pump system
4PW41598-1H