Models 3.2 - 13.2, controller µchiller
Blue Box - Page 68
SYMPTOM
OPERATION
PROBABLE CAUSE
POSSIBLE CORRECTIVE ACTION
COOLING
HEATING
L)
Compressor 1 and/or 2
not working (display
On with alarm “L1”
and/or “L2”)
⊗ ⊗
Refrigerant circuit
completely empty
Check refrigerant circuit with
leak detector after pressurising to
approximately 4 bar. Repair leak,
apply vacuum, charge circuit.
⊗ ⊗
Low pressure switch faulty Check and replace if necessary
⊗
Metallic coil filter clogged;
air flow too low (only
LC/HP)
Clean filter with compressed air
⊗ ⊗
Refrigerant filter clogged Check and replace if necessary
⊗ ⊗
Faulty water circulator
pump
Check and replace if necessary
⊗
Defrost pressure switch
with incorrect setting (only
version LC/HP)
Check and correct setting
⊗ ⊗
Liquid refrigerant valve not
completely open (if present)
Check and open fully
⊗ ⊗
Thermostatic expansion
valve not operating
correctly
Check, clean, or replace if
necessary
⊗ ⊗
Evaporator metallic filter
clogged
Clean the filter
⊗ ⊗
Evaporator circulating
pump faulty
Check, and replace if necessary
To Next Page
Loading...
