Adapting the heating curve.
The Control Panel adapts the water’s set-point to the actual temperature
in the room, as measured by the Control Panel’s user interface, so as
to maintain a constant temperature in the room, for comfort and energy
saving.
For this reason the actual water temperature may vary as against the
calculated set point one, by +/- 5°C.
The user can interact with this function increasing or decreasing teh set-
point, regulating the water temperature through parameter 4, as shown in
the picture.
Correction of room temperature
The user can correct the temperature measured by the Control Panel in
case of mistakes due to placement.
Through parameter 13 (see parameter’s functions table) it is possible to
correct teh temperature by +/-5°C.
Reset of installer parameters
To enter:
- Push the Zone key and the Lock key concurrently for 10 seconds.
- The number 899 is displayed in the Temperature area of the screen.
- The number 10 is displayed in the Time area of the screen.
- Activate the arrow keys.
- Set the value “0”.
- The temperature “Fd” abbreviation is displayed in the Temperature area
of the screen.
- Reset is activated.
- The Control panel is reset to the default values.
Fault signal
Preliminary instructions
In the presence of operating faults, the unit is put into a safety condi-
tion and its use is blocked.
The safety shutdown can be due to a random situation.
Wait for at least 10 minutes before restarting the unit.
Any repetition of the abnormal operation requires an accurate check
of the unit’s components.
Before resetting, it is necessary to remove the cause of the anomaly.
Abnormal operations are notified by the Control Panel with numeric
codes.
Part of the alarms resets automatically, while others require a manual
reset by the Technical Service.
Frozen plates exchanger. If this fault code is displayed, it means that
the plates exchanger froze during cooling operation. The only way to
restart the unit is to powered OFF -->ON the unit. Before doing this
operation, contact the Technical Service.
Faults are also indicated by a LED on the circuit board.
Example: error 23.
Off for 4 seconds.
2 flashes: first number.
Off for 2 seconds.
3 flashes: second number.
Off for 6 seconds.
The cycle repeats until the problem is solved.
Code
Description
2
Outside safety alarm
3
Frozen plates exchanger
4
Heat exchanger refrigerant temperature sensor BPHE
5
Air temperature sensor GMC
6
Loss of communication with the Control Panel
7
Control Panel control room temperature sensor
9
Water sensor / water pump error
10
EEProm Corrupt
11
Wrong capacity setting
12
4-way valve faulty
13
Loss of communication to RS485 (system configuration 6)
14
Loss of inverter board signal
15
Water outlet temperature sensor (LWT)
17
Inverter air temperature sensor (TO)
18
G-Tr short circuit protection
20
Compressor rotor position control error
21
Inverter current sensor error
22
Heat exchanger refrigerant or compressor suction line sensors (TE)/ (TS)
23
Compressor outlet temperature sensor (TD)
24
Fan motor error
26
Other inverter board errors
27
Compressor locked
28
Outlet temperature error
29
Compressor breakdown
30
Low pressure system error
31
High pressure system error
See the diagrams of page 22 of this booklet for the positions of the LED
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