7. TROUBLESHOOTING
Before requesting the intervention of a service point, we advise you to carry out the following checks. The
table contains tips that can solve the most common problems. If after carrying out these checks the system
still does not work, call the nearest Climma assistance centre. by calling the Veco assistance service at
+39.0362.35321 or by consulting the WEB page www.climma.it
7.1. The digital panel shows n.Pr
The dip-switch of the board is not programmed. see chapter. 3.1.1
7.2. The digital panel shows Err
The fresh water temperature sensor CO is not connected or it is defective. Check the sensor. See Errore.
L'origine riferimento non è stata trovata.
7.3. Product identification
Each product is identified with a nameplate. Refer to the description, code, and serial number in all cases of
reporting faults to the Service Centre. It is also advisable to identify the control panel that is connected to the
MV8.
Also check that the type of operation of the fan coil (Fan Only, Water valve, EH electrical heating)
corresponds to the setting of the board.
7.4. Fuses
There are 2 fuses on the board:
FI protects all power outputs (fan and water valve) with the
exception of the electrical resistance. Value 6.3 A
F2 protects the power supply of the logic part of the board. Value
0.5 A
7.5. Supply check
On the board there is an LD1 indicator light that turns on when the board is powered. If it does not turn on,
check fuse F2.
7.6. The fan doesn’t work
If the LED LD1 is on but the fan does not work, check fuse F1 which protects the power outputs of the board.
Check that the power supply voltage is not too low. Check the value of the supply voltage at the input
terminals on the MV8 board.
7.7. Erratic fan speed control
Check that the controller is compatible with the fan coil model to which it is connected. If in doubt, also check
the values of the 3 control capacitors (see 8.2).
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