Models 14.4 - 26.4, controller pCO
2
Blue Box - Page 84
SYMPTOM
OPERATION
PROBABLE CAUSE
POSSIBLE CORRECTIVE ACTION
COOLING
HEATING
G)
No compressor
running. Display On:
⊗ ⊗
No consent from digital
input to compressors
Check consent to compressors
and close relative contacts
unit ON without alarm
⊗ ⊗
Unit at temperature Normal operation
⊗ ⊗
Compressor fuses burnt-
out
Check continuity of fuses; if
burnt-out call service
⊗ ⊗
Controller faulty Call service
H1)
Only 1 compressor
running. Display On
⊗ ⊗
Excess refrigerant charge Check refrigerant charge and call
service organisation
with alarm
“High Pressure
Compressor 1 and 2 or
3 and 4”
⊗ ⊗
Problems at the condenser
hydraulic circuit
Check flow and temperature of
condenser entering water
⊗ ⊗
High pressure switch
incorrectly calibrated or
faulty
Check pressure switch setting
⊗ ⊗
Pressostatic valve
incorrectly set
Check setting of pressostatic
valve and call assistance
H2)
Only 1 compressor
running. Display On
with alarm
⊗ ⊗
Insufficient refrigerant
charge due to a leak in the
circuit
Call service
“Low Pressure
Compressor 1 and 2 or
3 and 4”
⊗ ⊗
Thermostatic valve faulty Call service
⊗ ⊗
Solenoid valve of liquid
refrigerant line faulty (if
present)
Call service
⊗ ⊗
Dehydrating filter clogged Call service
To Next Page
Loading...
