RDZ PDC FLOOR 12T, Installation Manual

Page: 46 / 64

EN
46
3 .7 Maintenance
According to Directive 842/2006/EC, systems containing 3 kg or
more of fluorinated greenhouse gases (F-gas) must be checked
for leakage at least once a year, using direct or indirect measur-
ing methods, by certified personnel in compliance with Regula-
tion 303/2008/EC. The maintenance company must also keep
a register in which be identified the technician who performed
the servicing or repair, as well as the dates and results of inspec-
tions carried out, it shows the amount and type of fluorinated
greenhouse gases used, any quantities added and the quantity
recovered during servicing, maintenance and final disposal.
Regular maintenance is indispensable for maintaining the
air-water heat pump always efficient, safe and reliable in time.
This can be carried out every six months, for some interventions
and annually for others by the Technical Service technicians who
are technically skilled, authorised and always have original spare
parts available.
The annual maintenance programme that the Technical Service
or the authorised technician must perform consists of the fol-
lowing checks and operations:
– Check expansion tank pressure
– The hydrometer pressure is between 1 and 2 bar.
– Fill the water circuit
– Check for air presence in water circuit
– Check efficiency of safety units
– Check power supply voltage
– Check electrical draw
– Tighten electrical connections
– Clean fan grills and external unit battery fins
– Check fouling of metallic mesh filter
3 .8 Operating aspects which should not be interpreted as problems
The following behaviours which could occur during operation
of the device are correct operations and must not be interpreted
as faults.
– The compressor does not start again until 3 minutes after be-
ing shut off.
– Periodical defrosting cycles are performed during heating.
– When switching from hot water production to cooling, and
vice versa, the external heat pump will be kept off for one
minute, so as to prevent hot and cold water from mixing.
– After 10 minutes of inactivity the screen saver is enabled. To
restore the normal display touch the screen.
– Hot water production, which has higher priority over the oth-
er settings, requires external unit pump operation until the
desired setpoint is reached (default setting 45°C, adjustable
between 30 and 55°C).
– In heating, the setpoint shown in tile F is subject to the ac-
tion of climatic control calculated according to the outdoor
temperature. Consequently, the device may produce water at
lower temperature.
3 .9 Faults and remedies
TABLE OF FAULTS AND REMEDIES
Effect Cause Remedy
The FL alarm appears on the controller
display after general switch-on
The water is not circulating well in the
system.
Check: the three-way valve for cold-hot deviation, that there are
no air bubbles in the circuit, that the screen filter is not obstruct-
ed, that the water pressure in the system is correct, that the P1
circulation pump is working correctly (increase head by operat-
ing on the regulator, if needed).
Noise or turbulences coming from the
hydraulic circuit are heard.
There is air in the circuit. Relieve the air using the external devices and the vent on the
inertia tank of the machine and take the circuit to the correct
charging pressure.
Check that the intake pressure (hydraulic circuit return) with the
pump on is higher than 0.6 bar.
The Lo alarm appears (automatic re-
arming first followed by manual)
The minimum antifreeze temperature
alarm has tripped. The water tempera-
ture at the T2 heat exchanger outlet is
less than 5 °C.
Check that nothing is preventing the good circulation of the wa-
ter in the system (air, obstructed air filter etc.).
Increase the head of pump P1 by operating on the regulator.
Alarm E1 appears (automatic rearming) The water temperature measuring sen-
sor is faulty or not connected correctly.
Check the connection and replace the sensor, if needed.
Alarm E2 will appear (automatic rearm-
ing)
The outlet water/antifreeze tempera-
ture measuring sensor is faulty or not
connected correctly.
Check the connection and replace the sensor, if needed.