Uniflair Aquaflair 00182, Instruction Manual, Page: 42 / 48

42
PROBLEM POSSIBLE CAUSE CHECK/CORRECTIVE ACTION
HIGH OUTPUT PRESSURE OR
INTERVENTION OF HIGH
PRESSURE PRESSOSTAT
High intake pressure Check the chilled water return
temperature and the control set
values
LOW OUTPUT PRESSURE OR
INTERVENTION OF LOW
PRESSURE PRESSOSTAT
The thermostatic valve is not set or
defective Check that the superheating of the
thermostatic valve is correct
(approx. 5°C)
Check that the bulb has not lost
pressure
The filter drier cartridge is dirty Check whether the filter dryer
cartridge needs to be changed; the
temperature differential before and
after the filter must be less than
2°C
With cold outside temperatures,
the LP pressostat intervenes
before the cooling circuit is stable Set the LP pressostat inhibition
time on start-up to 120 seconds
Insufficient refrigerant charge Check for leaks and re-charge until
supercooling of the liquid at the
condenser output is 3-5°C.
Insufficient water flow (wide
difference between chilled water
intake and output temperatures. Check the installation
specifications and the pump
characteristics: Check for leaks
from piping.
THE ANTI-FREEZE
PROTECTION CUTS IN
The chilled water output
temperature is too low. Check that the water flow is
sufficient and that the difference
between intake and output
temperature is not too high
The setting of the antifreeze alarm
or antifreeze sensor is incorrect. Check the alarm setting on the
control