Uniflair Aquaflair 00152, Инструкция по эксплуатации

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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)