Blue Box KAPPA V SR, Installation, Operating And Maintenance Manual

Page: 61 / 82

Blue Box 55
SYMPTOM OPERATION PROBABLE CAUSE POSSIBLE CORRECTIVE ACTION
COOLING HEATING
E)
No compressor
running. Display On: ⊗ ⊗ 220V fuses burnt-out
(FU51) Change fuses. If fuses burn-out
again, contact assistance
unit ON with alarm
“High Pressure
Compressor 1, 2, 3” ⊗ Fans contactor not
energised Check voltage across the
contactor coil and coil continuity
⊗ Fan fuses burnt-out (FU21) Check cause of burn-out and
change fuses.
⊗ Fan motor faulty Check and replace if necessary
F)
No compressor
running. Display On:
unit ON with alarm
“Fans protection” ⊗ ⊗ Fan thermal protection
intervention Check insulation between
windings and from windings to
earth (ground)
⊗ ⊗ Fan motor faulty Check and replace if necessary
⊗ ⊗ Faulty fan alarm relay Check and replace relay
G)
No compressor
running. Display On:
unit ON with alarm
⊗ ⊗ Drop in power feeding
voltage
Check voltage stability and fit
appropriate protection if
necessary
“Thermal protections
Compressor 1, 2, 3”
⊗ ⊗ Setting of thermal
protections Contact assistance
⊗ ⊗
Circuits partially discharged Call service to replenish charge