710.1759.01.01-00D
19/09/2018
12
Never touch any part of the refrigerant circuit when the cooler is running!
14)
Because the pump starts up immediately, make sure that the direction of rotation for the pump matches the
direction of the arrow on the casing. If it is rotating in the opposite direction, turn off the main switch of the cooler
immediately and arrange for the polarity of the cooler to be reversed.
15)
After a few minutes carefully open the filler screw again in order to remove any residual air. Tighten the screw
again afterwards.
16)
Wait until the cooler has attained the operating conditions. This is indicated when the display shows the preset
working range.
17)
Check whether the pressure shown is within the limits specified for the pump. If not, take appropriate action to
ensure that pump is able to run within the specified limits.
18)
Check the level in the tank and top up with cooling medium if required. Fasten the tank cap afterwards.
19)
Check the inside of the cooler and the piping system for leakage or loose connections.
20)
Fit the front panel and the two side panels back onto the casing.
21)
Check the preset target value. The water cooler is normally factory-set to the temperature required by the
customer.
22)
When the cooler is within the operating conditions set by the manufacturer, check whether the current uptake of
the cooler matches the data indicated on the identification plate and those contained in the table in the
supplement.
6.2 OPERATING SETTINGS OF THE ELECTRONIC CONTROLLER
All operations must be carried out by qualified personnel only.
The water cooler is supplied pre-adjusted for normal operating conditions and normally does not require
any modifications, except for the setting the temperature of the cooling medium to the desired value.
Checking and any possible adaptation of the operating parameters is carried out via the controls on the
front of the water cooler and via the control panel. The water coolers are equipped with an operating
thermostat to maintain the cooling medium temperature at a constant value.
Type
Controller display
Models
Type A
CHA 1.3 to CHA 129
S
y
m
b
o
le
Fan enabled (ON) – Programming Phase (flashes) – Anti-short cycle delay enabled
(flashes)
Defrost enabled (ON) – Programming Phase (flashes)
AUX
Second relay ON (ON)
A temperature alarm happened (ON)
Type
Controller display
Models
Type D
CHA 1.3 to CHA 129
S
y
m
b
o
ls
Regulation enabled (ON) – Anti-short-circuit delay active (flashes)
Degrees Celsius (ON) – Programming phase (flashes)
AUX
Second relay active (ON)
A temperature alarm has been triggered (ON)
6.2.1 ELECTRONIC CONTROLLER
The operating thermostat is supplied in a pre-adjusted state according to the standard specifications of
the water cooler listed in the supplement. The operating thermostat controls both the temperature
adaptation functions and the other safety parameters (e.g. alarm management and the running time of
the electric motors). The complete list of parameters in not supplied to the customer because changes in
certain parameters may lead to problems affecting the reliability and characteristics of the water cooler.
