21
6.2
ALARMS AND WARNINGS LIST
See the following table for the main possible causes for an alarm or warning and their solution:
FAULT
CAUSE
SOLUTION
RESTART PROCEDURE
HP alarm by pressure
switch
Alarm due to high
pressure of the
refrigerant:
T
he pressure
of the fridge circuit
is
higher than the maximum
allowed. It stops the
compressor
Lateral panels of the
housing open
Low airflow into the
condenser
The ambient
temperature is too
high
Motor fan not working
High pressure switch
failure
Close the panels
Check that there is enough free
space in front of the condenser
and clean the condenser if
necessary
Wait until the ambient
temperature is lower
The motor fan is not working if it
is not turning when the chiller is
running and then tripping by this
alarm.
Contact authorized
technical service
Contact authorized technical
service
Disconnect the chiller by
turning Off the main power
switch (see point 4.1). Turn it
back On after at least 30
seconds have passed
Alarm freeze evaporating
temp.
Alarm due to low
evaporating temperature:
The evaporation
temperature is too low
and there is risk of
freezing. It stops the
compressor if it happens
3 times in a short period
Water circuit blocked
Possible freezing due
to low ambient
temperature
Water tank
temperature sensor
fault
Clean the water circuit. If
necessary replace the water filter
element. Check for closed valves
in the circuit
The ethylene glycol
concentration must be according
to point 3.1 and the antifreeze
setpoint also has to be adjusted
accordingly.
Contact authorized
technical service
Measure the water temperature
inside the tank and check that it is
approximately the same as shown
on the controller's display. If it
isn’t
contact authorized technical
service
Disconnect the chiller by
turning Off the main power
switch (see point 4.1). Turn it
back On after at least 30
seconds have passed