Uniflair Aquaflair 00182 Instruction Manual page 42

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