Blue Box SIGMA 2002, Installation, Installation, Operating, Operating, And Maintenance Manual

Page: 87 / 124

Models 14.4 - 26.4, controller pCO
2
Blue Box - Page 81
SYMPTOM OPERATION PROBABLE CAUSE POSSIBLE CORRECTIVE ACTION
COOLING HEATING
E1)
No compressor
running. Display On:
unit ON with alarm
“High Pressure
Compressor 1, 2, 3, 4” ⊗ ⊗ 220V fuses burnt-out
(FU51) (in version LC and
LC/HP also the alarm “Fans
protection” will be
displayed) Change fuses. If fuses burn-out
again contact assistance
⊗ Insufficient condenser
water flow Check hydraulic circuit and
condenser water flow
⊗ ⊗ Entering condenser water
temperature too high Check hydraulic circuit of
condenser
⊗ ⊗ The unit has an excessive
refrigerant charge (only
version LC and LC/HP) Call assistance
⊗ ⊗ Remote condenser faulty
(only LC version LC and
LC/HP)
E2)
No compressor
running. Display On:
⊗ ⊗
Entering condenser water
temperature too high Check flow and temperature of
condenser entering water
unit ON with alarm
“Thermal protections
Compressor 1, 2, 3, 4”
⊗ ⊗
Drop in power feeding
voltage Check voltage stability and fit
appropriate protection if
necessary
⊗ ⊗ Setting of thermal
protections Contact assistance
⊗ ⊗ Circuits partially discharged Call service to replenish charge