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INSTALLATION, OPERATION
AND MAINTENANCE MANUAL
WALL MOUNTED CONTROL – SAME FUNCTIONS AS THE REMOTE CONTROL
CASSETTE WITH A CONTROL BOARD THAT IS MANAGED ONBOARD
1
2
3
4
5
6
1
Function mode: Cool = cooling; Heat = warming; Fan = only ventilation;
Auto = only for units with 4 pipes (cooling and heating).
2
Select the desired room temperature (18 °C to 30 °C)
3
Select the fan speed (4 positions + automatic)
4
Night function:
5
Setting the hour.
6
Setting the minutes.
7
Turns the unit on or off
8
Enables or disables the movement of the vents
9
Turbo function: warms or cools for 30 min at the maximum speed
10 Setting the current time.
11 Daily timer on
12 Daily timer off
Refer to the I.R. remote control to learn the functions
WALL-MOUNTED CONTROL OPERATIONS
CASSETTE WITH A CONTROL BOARD THAT IS MANAGED ONBOARD
Self-diagnosis
The system comes with a self-diagnosis circuit to monitor the microprocessor
functions. In the event of malfunction this circuit automatically resets the micro-
processor.
System memory
The system stores the set parameters (such as the operating status, fan speed,
etc.) in its non-volatile storage. After a power failure, the cassette will auto-
matically resume operation with the same parameters that were set prior to
the blackout (except the SLEEP and TIMER modes which will be erased). Any
change to the parameters will be saved in the non-volatile storage after 5 se-
conds.
Situation of normal operation
The POWER indicator light is on if the cassette was switched on via the I.R.
remote control.
The TIMER indicator light is on if the AUTO START and AUTO STOP modes
are active.
The SLEEP indicator light shows the temperature compensation during the
SLEEP mode.
TROUBLESHOOTING
1) The POWER, SLEEP and TIMER indicator lights blink continuously: The
system is protected by the cutting off of power to all the outputs.
This type of alarm is generated by one events:
- safety fl oat with an always open contact (the main condensation basin is full
of water).
Remedy: check the condensate drainage circuit (pump, fl oat, drain hoses):
inclination and height.
2) The SLEEP indicator lights blink continuously (Pic. 50A):
- Coil water temperature above 80 °C.
Remedy: check coil water temperature.
3) The POWER indicator fl ashes intermittently (Pic. 50 B).
This type of alarm can be caused by three events:
a) When 3 minutes have elapsed from the start of the COOL or DRY cycles, coil
temperature is above 25° C. The system is protected by the cutting off of power
to the valve output.
Remedy: check the coil water temperature and correct valve operation.
b) When 3 minutes have elapsed from the start of the HEAT cycle, coil tempe-
rature is not above 20° C. The system is protected by the cutting off of power
Vers. 2009-3
to the valve output.
Remedy: check the coil water temperature and correct valve operation.
c) The incorrect mode has been set:
- there is hot water when the mode is set on cooling;
- there is cold water when the mode is set on heating;
7
4) TIMER indicator light blinks continuously (Pic. 50A):
Air temperature sensor and water temperature sensor are damaged or not con-
nected.
8
5) TIMER indicator light blinks intermittently (Pic. 50B): the fi lters must
be cleaned.
When the cassette has been operating for more than 500 hours, a warning is
9
displayed as a reminder to clean the fi lter.
6) The POWER indicator fl ashes intermittently (Pic. 50 C).
10
Only for cassettes HC4S.
Safety switch (LS1) open.
ATTENTION: reset by cutting off the power for at least 10 seconds. Una
11
volta ridata tensione l'unità rientra in allarme se dopo 3 minuti questo sta-
to persiste. Once the power returns the unit will return to the alarm status
12
if this persists after 3 minutes.
Pic. 49
A
B
C
CONDENSATE DRAIN PUMP OPERATION SPECIFICATIONS
CASSETTE WITH A CONTROL BOARD THAT IS MANAGED ONBOARD
Cool - The unit is running: the pump is always on until the set temperature is
reached.
The unit is turned off from the remote control or the set temperature has been
reached: when the water reaches the fl oat, the contact is opened and the pump
is activated for 3 minutes; after which, if the fl oat does not close the contact
once again (water discharge), the unit will enter an alarm status.
Dry - cool.
Heat - The unit is running or was turned off from the remote control: the pump
is activated by the fl oat.
Fan - heat.
Auto
If the unit is in the cool mode, the pump follows the cool operation.
If the unit is in the heat mode, the pump follows the heat operation.
CASSETTE WITHOUT A CONTROL BOARD THAT IS MANAGED ONBOARD
The condensate discharge pump is activated when the water level inside the
main condensation basin reaches the fl oat and opens its contact. A timer acti-
vates the condensate discharge pump for about 3 minutes (empty-basin cycle),
which is repeated until the fl oat's contact is closed.
No discharge condensate alarms are foreseen.
PRE-HEATING FUNCTION
CASSETTE WITH A CONTROL BOARD THAT IS MANAGED ONBOARD
Pre-heating function is used to avoid cold air in HEAT mode when the valve is
open. The valve remains open also if within 3 minutes the coil temperature has
not reached the 35°C.
FAN SPEED
Set
slow
OFF
0
5
20
water cassettes
10
15
20
23
25
30
35
COIL TEMPERATURE [Ti]
ON
OFF
ON
OFF
ON
OFF
Fig. 50
40
45
50
°C
Pic. 51
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