INSTALLATION, OPERATION
AND MAINTENANCE GUIDE
WATER CASSETTES
lenta
Set
0
5
10
30
FAN
SPEED
Fig. 45
15
20
25
35
OFF
40
45
50
23
°C
COIL TEMPERATURE [Ti]
Fan
As for heat.
Cool-heat
(
automatic
)
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.
PRE-HEATING FUNCTION
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
ON
OFF
ON
OFF
B
A
Fig. 44
AUTO
HIGH
MEDIUM
LOW
Fig. 46
6
Increases the minutes on the display.
7
Turns the cassette
ON
or
OFF
.
8
Activates or deactivates louver movement (optional).
9
Adjusts the louvers in order to direct the airflow in the best direction (optional).
10
Selects the exact time on the remote control display.
11
Sets timed switching off.
12
Sets timed switching on.
WALL-MOUNTED CONTROL OPERATIONS
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 microprocessor.
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 automatically 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 seconds.
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.
Situation of alarm
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:
a) Condensate drain pan float:
Remedy: check the condensate drainage circuit (pump, float, drain hoses).
2) The SLEEP indicator lights blink continuously
. This type of alarm
is generated by one events:
a) Coil water temperature above 80 °C.
Remedy: check coil water temperature.
3) POWER indicator light blinks continuously
. This type of alarm is
generated by two 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
temperature is not above 20° 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.
4) TIMER indicator light blinks continuously
(fig. 44 A):
Air temperature sensor and water temperature sensor are damaged
or not connected.
5) TIMER indicator light blinks intermittently
(fig. 44 B): the filters
must be cleaned.
When the cassette has been operating for more than 500 hours, a
warning is displayed as a reminder to clean the filter.
N.B. Reset by cutting off the power for at least 10 seconds.
CONDENSATE DRAIN PUMP OPERATION SPECIFICATIONS
Cool
Unit in operation: the pump operates continuously until the set
temperature is reached; when 3 minutes have elapsed from the start of
the cycle, if the water reaches the float and opens its contact, the unit
instantly shows an alarm through the fast blinking of the indicator lights
C
on the panel (the power is cut off to all the outputs). Unit switched off
by remote control, or with set temperature satisfied, or within 3 minutes
preceding cycle start: when the water reaches the float, its contact opens
and activates the pump for 3 minutes; when the 3 minutes have elapsed,
if the float does not close its contact again (water drainage), the unit
shows an alarm (fast blinking of the indicator lights).
Dry
As for cool.
Heat
- Unit in operation or switched off by remote control: the pump is
never activated.
If Ti<23°C, fan is OFF.
If 23<Ti<35°C, fan runs at minimum speed
If Ti>35°C, fan runs at setted speed.
ELECTRICAL CHARACTERISTICS
Power supply1Ph from 185 to 255 VAC, 50/60Hz
Power consumption
Less than 8 VA in stand-by
Valve activation time delay3 minuts ± 5 seconds
Temperature:
Room temperature accuracy±1°C
Coil temperature accuracy±2°C
Storage temperature
0
¸
70°C
Operating temperature
10
¸
80°C
Setting temperature range
18
¸
30°C (+1°C step)
ON/OFF temperature differential
1°C
DETAILS OF WALL-MOUNTED CONTROL
The following commands be given by the buttons on the eall-mounted
control.
Switching on/off
Press the
POWER
button to switch the cassette on or off. When the
system has been switched on, it will operate according to the settings
shown on the display. The
POWER
indicator light on the display comes on.
Fan
Press the
FAN
button to select the fan speed (high, medium, low or auto
mode). The display instantly shows the operating status.
Auto mode
When the fan speed is set in the auto mode, the speed is adjusted
automatically according to the difference between the room temperature
and the set temperature:
If the difference is 3°C or more, the speed is
HIGH
;
If the difference is 2°C, the speed is
MEDIUM
;
If the difference is 1°C or less, the speed is
LOW
;
Note: the FAN button is only active in the
FAN
,
COOL
,
HEAT
and
AUTO
modes. It cannot be used in the
DRY
(dehumidifying) mode.
OPERATING MODE
FAN
The writing
FAN
appears on the air-conditioner control display. In this
mode the unit operates as a fan only. The
SLEEP
,
TEMP
and
TEMP
buttons are not used.
COOL
The writing
COOL
appears on the air-conditioner control display. The
unit operates in the air-conditioning mode.
- the zone valve starts if Troom Tset+1
- the zone valve stops if Troom Tset
In any case activation of the zone valve is subject to 3 minutes delay
each time it stops.
DRY
The writing
DRY
appears on the air-conditioner control display. The unit
FAN
COOL
DRY
HEAT
AUTO
Fig. 47
16
