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6.
M
AINTENANCE
6.1. Maintenance activities
In order to ensure optimal operation of the unit, a number of checks
and inspections should be carried out on the unit at regular intervals,
preferably yearly. This maintenance shall be carried out by the
installer or service agent. Refer to the installation manual for more
details.
The only maintenance which may be required by the operator is:
■
keeping the remote controller clean by means of a soft damp
cloth,
■
checking if the water pressure indicated on the manometer is
above 1 bar.
WARNING
If the supply cord is damaged, it must be replaced by the
manufacturer, its agent or similar qualified persons in order
to avoid hazards.
WARNING
During longer periods of standstill, e.g. during summer with
a heating only application, it is very important NOT TO
SWITCH OFF THE POWER SUPPLY towards the unit.
Switching off the power supply stops the automatic
repetitive movement of the pump in order to prevent it from
getting jammed.
6.2. Important information regarding the refrigerant
used
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol.
Refrigerant type:
R134a
(1)
GWP
value:
1300
Refrigerant type:
R410A
(1)
GWP
value:
1975
(1)
GWP = global warming potential
Periodical inspections for refrigerant leaks may be required
depending on the applicable legislation. Please contat your installer
for more information.
Operation manual
21
7.
T
ROUBLESHOOTING
This section provides useful information for diagnosing and correcting
certain problems which may occur with the unit.
P
OSSIBLE CAUSES
No readings on the remote controller
(blank display)
One of the error codes appears
The schedule timer does work but
the programmed actions are
executed at the wrong time
(e.g. 1 hour too late or too early)
The domestic hot water schedule
timer is programmed but does not
work.
Capacity shortage
C
ORRECTIVE ACTIONS
• Check if the mains power is still
connected to your installation.
• The benefit kWh rate power
supply is active (see installation
manual).
Consult your local dealer.
Refer to the installation manual for a
detailed list of error codes.
Check if the clock and the day of the
week are set correctly, correct if
necessary.
In case the pr icon is not displayed,
push the pr button to enable the
schedule timer.
Consult your local dealer.
HXHD125A7V1B
VRVIII system indoor unit
4PW62585-1 – 11.2010
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