43
PROBLEM
POSSIBLE CAUSE
CHECK/CORRECTIVE ACTION
THE COMPRESSOR DOES NOT
WORK WHEN CALLED BY THE
THERMOSTAT
One of the unit’s safety devices
has intervened
Check for alarms on the user
terminal display
Short circuit protection has
intervened
Check the cause of the short circuit
and change the fuses
The LP pressostat or anti-freeze
protection has intervened
See ‘Low output pressure or
intervention of low pressure
pressostat’ or ‘The anti-freeze
protection cuts in’
The control system is not giving a
correct system
Check the control system
The flow gauge does not give the
compressor start-up command
Check the water flow and the flow
gauge and pump function
THE COMPRESSOR INTERNAL
PROTECTION CUTS IN
A phase is missing
Check the compressor’s electrical
connections
N.B. Before starting the
compressor, check compressor
winding resistance and continuity
The motor is overloaded
Check that the unit is functioning
within the temperature limits given
in this manual
The rotor is blocked
Change the compressor
THE COMPRESSOR IS NOISY
Liquid return to the compressor
Check
the
function
and
superheating of the expansion
valve
The compressor is damaged
Call the nearest service centre for
repair or replacement of the
compressor
LOW OUTPUT PRESSURE
The condensation pressure control
system is not efficient
Check the function of the fan
speed regulators
Check the function of the air
temperature sensor
The chiller is functioning with
external air temperatures which
are too low
Check that the unit is functioning
within the temperature limits given
in this manual
HIGH INTAKE PRESSURE
Chilled water return temperature is
higher than normal
Check that the unit is functioning
within the temperature limits given
in this manual
Liquid refrigerant return to the
compressor
Check the function of the
expansion valve and the correct
positioning of the bulb
Check that superheating of the
thermostatic valve is correct
(approx. 5°C)
Summary of Contents for Aquaflair 00152
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