Installation and operation manual
38
HXY48TAVJU
VRV System indoor unit
3P616151-1A – 2021.12
11. Maintenance
11.1. Important information regarding the refrigerant
used
This product contains fluorinated greenhouse gases. Do not vent
gases into the atmosphere.
Refrigerant type: R410A
GWP
(1)
value: 2087,5
(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.
11.2. 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.
12. Troubleshooting
The guidelines below might help to solve your problem. If you cannot
solve the problem, consult your installer.
12.1. 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 25.
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.
13. Technical Data
13.1. Piping diagram
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
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.
Possible causes
Corrective actions
No readings on the user interface
(blank display)
Check if the main power is still
connected to your installation.
One of the malfunction codes
appears
Consult your local dealer.
Refer to the installation manual or
below table for a detailed list of
malfunction codes.
The schedule timer does work but
the programmed actions are
executed at the wrong time.
(e.g. 1 hour too late or too early)
Check if the clock and the day of the
week are set correctly, correct if
necessary.
The schedule timer is programmed
but does not work.
In case the
pr
icon is not displayed,
push the
pr
button to enable the
schedule timer.
Capacity shortage
Consult your local dealer.
a
R1T
R2T
R3T
R4T
a b c
d
e
f
k
k
l
j
i
h
g
k
m
g
j
R3T
c
R4T
d
k
k
k
R2T
i
h
b
R1T
e
a
m
l
a
f
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