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

Page: 88 / 124

Models 14.4 - 26.4, controller pCO
2
Blue Box - Page 82
SYMPTOM OPERATION PROBABLE CAUSE POSSIBLE CORRECTIVE ACTION
COOLING HEATING
E3)
No compressor
running. Display On: ⊗ ⊗ Insufficient percentage of
glycol in hydraulic circuit Restore correct glycol percentage
unit ON with alarm
“Low Pressure
Compressor 1, 2, 3, 4”
⊗ ⊗
Both circuits have
insufficient refrigerant
charge Find possible leaks in circuit,
repair, and recharge
⊗ Incorrect setting of defrost
set-point (only version
LC/HP)
Check and correct setting if
necessary
E4)
No compressor
running. Display On:
unit ON with alarm ⊗ ⊗ Insufficient water flow to
evaporator Increase water flow to
evaporator and check
temperature rise
“Exceeded Threshold
Low Temperature of
leaving User Water”.
⊗ ⊗
Faulty controller Contact service organisation
E5)
No compressor
running. Display On:
unit ON with alarm
“Exceeded Threshold
High Temperature of ⊗ ⊗ Excessive thermal load Wait until entering water
temperature is below the alarm
set point. Start hydraulic circuit
of evaporator and unit. If not
sufficient contact assistance.
entering User Water
⊗ ⊗ Refrigerant circuits partially
discharged Call assistance
E6)
(Only version LC)
No compressor
running. Display On:
unit ON with alarm
“Fans protection” ⊗ ⊗ Depending upon the fan
type installed Check thermal consent of fans