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

Page: 63 / 82

Blue Box 57
SYMPTOM OPERATION PROBABLE CAUSE POSSIBLE CORRECTIVE ACTION
COOLING HEATING
K)
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
L)
No compressor
running. Display On:
unit ON with alarm
⊗ ⊗ Power supply voltage not
stable Check power supply voltage; if
not correct contact the electricity
company
“No power to
Control circuits”
⊗ ⊗
Fuses FU51 burnt-out Check cause of fuse burn-out
and replace fuses.
M)
No compressor
running. ⊗ ⊗ No water flow to
evaporator Check hydraulic circuit
Display On: unit
OFF with alarm
“Flow Switch Alarm” ⊗ ⊗ Flow switch faulty Check flow switch contact and
replace if necessary
N)
No compressor
running. Display On:
unit OFF with alarm
”Incorrect Phase
Sequence” and phase
sequence relay with
green LED On and
orange LED Off
⊗ ⊗ Incorrect phase sequence Invert two of the phase wires of
the power supply line