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12. Maintenance
12.1. Important information regarding the refrigerant
used
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol.
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 contact your local
dealer for more information.
12.2. Maintenance activities
In order to ensure optimal readiness of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals, preferably yearly. This maintenance should be
carried out by your local Daikin technician (see installation manual).
The only maintenance which may be required by the operator is:
Keeping the user interface 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.
13. Troubleshooting
The guidelines below might help to solve your problem. If you cannot
solve the problem, consult your installer.
Possible causes
No readings on the user interface
(blank display)
One of the malfunction 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 schedule timer is programmed
but does not work.
Capacity shortage
13.1. Malfunction codes list
When a safety device is activated, the user interface LED will be
flashing, and a malfunction code will be displayed.
A list of malfunctions and corrective actions can be found in
"8.6.2. Malfunction codes list" on page
Reset the safety by pushing the y button.
In case this procedure for resetting the safety is not successful,
contact your local dealer.
For other malfunction codes which may be displayed during the
system test run or operation, see the installation manual of the
outdoor unit.
Installation and operation manual
40
Corrective actions
Check if the main power is still
connected to your installation.
Consult your local dealer.
Refer to the installation manual or
below table for a detailed list of
malfunction 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.
25.
14. Technical Data
14.1. Piping diagram
a
i
a b c
d
e f
b
i
h
R1T
f
a
a
e
a Shut off valve with drain/fill valve (field installed)
b Expansion vessel
c Water filter
d Safety valve (3 bar)
e Manometer
f Pump (MP1)
g Plate heat exchanger
h Flowswitch (S1L)
i Airpurge
j Expansion valve (K1E)
k Refrigerant filter
l Liquid refrigerant piping
m Gas refrigerant piping
R1T Leaving water thermistor
R2T Return water thermistor
R3T Liquid thermistor
R4T Gas thermistor
Cooling
Heating
h
g
k
R1T
R4T
R2T
R3T
k
j
R4T
g
R2T
j
k
R3T
k
k
d
c
l
m
HXY080+125A7V1B
VRV IV System indoor unit
4P325971-1B – 2012.07
m
k
l
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