LCA
RG66000986 – Rev.00
28
FAULT
Possible causes
Corrective actions
High evaporation pressure
Water
T
too
high
Check the thermal load and/or
efficiency of the thermostat
function.
Check the efficiency of the
thermostatic valve
Defrosting absent or incomplete
Error in parameter settings
Check the setting of the start and
end defrost parameters on the
microprocessor
Check whether defrosting water is
properly drained from the coils
Check the uniformity of the
refrigerant circuit outlet
temperatures at the top and bottom
of the coils: the maximum thermal
differential allowed is 10 °C. Check
the refrigerant level
The 4-way valve has failed to work Check whether it is regularly
energized and deenergized.
