RDZ PDC FLOOR 12T, Installation Manual, Page: 47 / 64

EN
47
Alarm E3 will appear (automatic rearm-
ing)
The temperature measuring sensor po-
sitioned in the hot water boiler is faulty
or not connected correctly.
Check the connection and replace the sensor, if needed.
Alarm E4 will appear (automatic rearm-
ing)
The external temperature measuring
sensor (to be connected to terminals
13-14) is faulty or not connected cor-
rectly.
Check the connection and replace the sensor, if needed.
The hi alarm appears (automatic rearm-
ing)
The inlet water temperature detected
by T2, or the hot water tank, detected
by T3, has exceeded 80°C.
Check the diverting valves if a boiler is installed in the system.
If a solar collector is present in the system, T3 in the hot water
tank detects a high temperature but this does not prevent the
production of hot or cold water for the system.
The heat pump is not working No communication with the external
unit. Symbol appears on the control
unit display of the control panel accom-
panied by blinking RC1 prompt.
Repeat the automatic address setting procedure described in
the specific paragraph.
The B, C, F and G tiles of the touch
screen interface have been deactivat-
ed.
Turn on the device by using the Standby A tile.
The touch screen interface is off. Check that the master switch Q1 on the control panel is set to
the I-ON position.
Check that electricity is present and reset it if needed.
The Pdc alarm appear on the controller
display (automatic rearming)
The P05 alarm appears on the external
unit control panel on three-phase ver-
sion 12 or 15.
Invert two of the three-phase power phases.
The external unit is not working prop-
erly (symbol appears on the LCD of
the external control unit in addition to
letters E, F, H, L, P and numbers).
Check the meaning of the alarm on the EXTERNAL UNIT CON-
TROL PANEL (see chapter 3.10) and connect the RDZ S.P.A. Ser-
vice.
The heat pump is not working for heat-
ing or hot water
The auxiliary heating tile I is active. The auxiliary heater output was activated but the resistor or the
boiler active not active. Check that switch Q2 is armed and that
the boiler is powered.
Cal appears on the touchs creen inter-
face in tile L
The specific Cal function which consists in the exclusive opera-
tion of a boiler and switches off the heat pump was activated.
Check that the boiler is activated correctly with the installer.
The external unit defroster is not work-
ing and ice has formed on the battery.
Check the minimum installation clearances and remove any ob-
stacles.
Cooling or heating is not satisfactory The controller setpoint is too low (heat-
ing mode) or too high (heating mode).
Reset the setpoint according to needs.
The ambient thermostat connected
to terminals 5 and 6 is set too high for
cooling (or too low for heating).
Set the temperature to an appropriate value.
Tiles B and C are both deactivated. Activate one of the two.
The LEG alarm appears (view only) The anti-Legionella cycle ended incor-
rectly after 5 hours instead of holding
60°C for 2 hours.
The auxiliary heater (RESISTOR or BACK-UP BOILER) is not availa-
ble or the power is not sufficient for perform the function.
Contact the installer.
Any alarm signal is accompanied by the locking of the outputs,
by the sounding of the buzzer (to stop the latter, simply press
tile L) and by the string appearing in tile L. It is also subject to the
maximum time frequency check (three alarms per hour).
Below this value the alarm will be automatically reset, while, if
the set value is exceeded, rearming will be manual (in this case,
only on the emergency user interface, the alarms specific sign
shall alternate with the ALr sign that means that the device is
locked).
LED goes off when the event that triggered the alarm ceases;
only then will it be possible to reset the alarm, by pressing
for 5 seconds.
The opening of the DI1 inlet, connected to the differential
pressure gauge that acts as a flow meter, makes all the outputs
turn off immediately and, after 1 minute, when the pump is kept
on to check once again that the flow meter has closed, it triggers
the ALr manual reset alarm signal which alternates with the FL
sign, and turns the pump off permanently.