Quarterly Inspections; Annual Inspections; Magnesium Anodes; Emptying The Boiler - TESY HPWH 3.1 200 U02 Montage-, Betriebs- Und Wartungsanleitung

N.B.: The intervention of the thermostat excludes the operation of the electric heating elements but not
the heat pump system within the permitted operating limits.
Thermal protections
First step protection: when the tank water goes up to 80°C, the unit will stop and the relating error code
will be shown on the controller. This is an auto-reset protection. When tank water temperature goes
down, the unit can start again.
Second step protection: when the tank water keeps going up and reaches 85°C, the manual reset cut-off
will be active, the electrical heater stops, unless you manual reset the protector.
9.2.

Quarterly inspections

• Visual inspection of the general conditions of the equipment systems as well as the absence of leaks;
• Inspection of the ventilation filter, if present
9.3.

Annual inspections

• Inspection of the tightness of bolts, nuts, flanges and water supply connections that may have been loosened by vibration;
• Check the state of integrity of the magnesium anodes (see paragraph 10.4).
9.4.

Magnesium anodes

The magnesium anode (Mg), also called "sacrificial" anode, avoids any parasitic currents that are generated inside the boiler that
can trigger corrosion processes on the device surface.
In fact, magnesium is a metal with a lower electrochemical potential when compared to the material that lines the inside of the boil-
er, therefore it first attracts the negative charges that form with the heating of the water and that cause it to corrode. Therefore, the
anode "sacrifices" itself by corroding instead of the tank.
The integrity of the magnesium anodes must be checked at least every two years (even better if checked on an annual basis). The
operation must be carried out by qualified personnel. Before performing the inspection, it is necessary to:
• Empty the water from the boiler (see paragraph 10.5);
• Unscrew the upper anode and check its state of corrosion, if more than 30% of the anode surface is corroded then it is
necessary to replace it;
The anodes have appropriate sealing gaskets, in order to avoid causing water leaks, it is recommended to use anaerobic sealant
for threads compatible for use on sanitary and heating systems. The gaskets must be substituted both in case of inspection as well
as the replacement of anodes with new gaskets
The integrity of the magnesium anodes must be checked at least every two years (even better if checked
on an annual basis). The manufacturer does not bear the responsibility for all consequences caused by
not obeying the instructions, given hereby.
9.5.

Emptying the boiler

It is advisable to drain the water from inside the boiler if the boiler is idle for a certain period of time, especially in low temperatures.
Close tap 2 (Fig. 8). Then open the tap hot water in the bathroom or kitchen which one is closer to the tank. Next step is to open
draining tap 8(Fig. 8).
N.B.: It is important to empty the system in case of low temperatures in order to avoid the water freezing.

10. TROUBLESHOOTING

In case of problems of equipment performance, without the occurrence of any of the alarms or errors described in the relative para-
graphs, it is advisable to check to see if the problem can be easily solved by checking the possible solutions specified in the table
below prior to seeking technical assistance.
Problem
The heat pump does
not work
The compressor and/or the fan do not work
10.1.

Malfunctioning of the unit and error codes

When an error occurs or the protection mode is set automatically, the circuit board and the wired controller will both display the
error message.
Protection/ Error code LED indicator
Malfunction
Standby
Normal run-
ning
Lower tank P1
water temp.
sensor failure
Possible reasons
Dark
Bright
★ ● 1) The sensor open circuit
2) The sensor short circuit
(1flash 1 dark)
3)PCB board failure
Possible causes
There is no electricity;
The plug is not correctly inserted in the socket.
The set safety period of time has not finished;
The scheduled temperature has been reached.
Corrective actions
1) Check the sensor connection
2) Replace the sensor
3)change the PCB board
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