8 Troubleshooting
Operation manual
17
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688015-1C – 2022.09
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
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.
WARNING
The appliance shall be stored so as to prevent mechanical
damage and in a well-ventilated room without continuously
operating ignition sources (example: open flames, an
operating gas appliance or an operating electric heater).
WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Do NOT use cleaning materials or means to accelerate
the defrosting process other than those recommended
by the manufacturer.
▪ Be aware that the refrigerant inside the system is
odourless.
NOTICE
Applicable legislation on
fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent
tonnes:
GWP value of the refrigerant × total refrigerant
charge [in kg]/1000
Contact your installer for more information.
8
Troubleshooting
Contact
For the symptoms listed below, you can try to solve the problem
yourself. For any other problem, contact your installer. You can find
the contact/helpdesk number via the user interface.
1
Go to [8.3]:
Information
>
Dealer information
.
8.1
To display the help text in case of a
malfunction
In case of a malfunction, the following will appear on the home
screen depending on the severity:
▪
: Error
▪
: Malfunction
You can get a short and a long description of the malfunction as
follows:
1
Press the left dial to open the main menu and go to
Malfunctioning
.
Result:
A short description of the error and the error
code is displayed on the screen.
2
Press in the error screen.
Result:
A long description of the error is displayed
on the screen.
8.2
To check the malfunction history
Conditions:
The user permission level is set to advanced end user.
1
Go to [8.2]:
Information
>
Malfunction history
.
You see a list of the most recent malfunctions.
8.3
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
change the desired room
temperature"
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
12].
The desired room temperature
cannot be reached.
Increase the desired leaving
water temperature in accordance
with the heat emitter type. See
"5.6.3 To change the desired
leaving water temperature"
The weather-dependent curve is
set incorrectly.
Adjust the weather-dependent
curve. See
14].
8.4
Symptom: Unit failure
When the heat pump fails to operate, the optional external backup
heater kit can serve as an emergency heater. It then takes over the
heat load either automatically or by manual interaction.
▪ When
Emergency
is set to
Automatic
(or
auto SH normal/DHW
off
)
(1)
and a heat pump failure occurs, the backup heater
automatically takes over the heat load.
▪ When
Emergency
is set to
Manual
and a heat pump failure
occurs, the space heating stops.
To manually recover it via the user interface, go to the
Malfunctioning
main menu screen and confirm whether the
backup heater can take over the heat load or not.
▪ When
Emergency
is set to
auto SH reduced/DHW off
(or
auto
SH reduced/DHW on
)
(2)
and a heat pump failure occurs, space
heating is reduced.
Similarly as in
Manual
mode, the unit can take the full load with
the backup heater if the user activates this via the
Malfunctioning
main menu screen.
When the unit fails,
or
will appear on the user interface.
(1)
auto SH normal/DHW off
has the same effect as
Automatic
, but should NOT be used because there is no domestic hot water.
(2)
auto SH reduced/DHW on
has the same effect as
auto SH reduced/DHW off
, but should NOT be used because there is no domestic hot
water.
Summary of Contents for EWAA004D2V3P-H
Page 19: ......
