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

Page: 86 / 124

Models 14.4 - 26.4, controller pCO
2
Blue Box - Page 80
SYMPTOM OPERATION PROBABLE CAUSE POSSIBLE CORRECTIVE ACTION
COOLING HEATING
A)
No compressor running
(display Off) ⊗ ⊗ No mains power Check presence of mains power
⊗ ⊗
Main power switch Off
(position "O")
Turn main power selector to
position "I"
⊗ ⊗ Transformer fuses and/or
fuses 24 V burnt-out Check fuses and if necessary
replace burned out fuses (FU50
and FU51). If fuses burn-out
again call for assistance
⊗ ⊗ Electronic control card
faulty Call assistance
B)
No compressor
running. Display On:
”OFF from external
consent”
⊗ ⊗
No external consent Check presence of external
consent; if not present, bridge
terminals 1 and 2
C)
No compressor
running. Display On:
”OFF from supervision
system” ⊗ ⊗ No consent from
supervision system Activate operation from
supervision system
D)
No compressor
running. Display On:
”OFF” ⊗ ⊗ No consent from “on/off”
key of user interface Press “on/off” key