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Alarm Recovery
Display Messages • 19
16 Display Messages
16.1.Alarm Recovery
Probe alarms
P1
and
P2
start a few seconds after
the fault in the probe; they automatically stop few sec-
onds after the probe restarts normal operation. Check
the connections before replacing the probe. Maxi-
mum and minimum alarms
HSH
,
LSH
,
MoP
, and
LoP
automatically stop as soon as the variable returns
to normal values.
The controller is provided with an internal check
to verify memory integrity. Alarm
EE
flashes when a
failure in the internal memory is detected. In this case,
call for service.
Message
Cause
Outputs
nA
None of the digital in-
puts configured as
CCL
are activated
Valve closed
Pf
The
PEd
time is
elapsed and the regu-
lation is stopped.
Valve closed after
PEd
. There is a
probe error.
P1
Temperature probe
fault
According to
PEo
and
PEd
P2
Pressure transducer
fault
According to
PEo
and
PEd
HSH
High superheat alarm
By
PI
LSH
Low superheat alarm
Valve closed
LPL
Low pressure limit
See
LPL
parame-
ter
MoP
Maximum Operating
Pressure
See
dML
parame-
ter
LoP
Lowest Operating
Pressure
See
dML
parame-
ter
StF
Start Function en-
abled
See
SFd
parameter
StP
Regulation stop
caused by
Std
and
Sti
Valve closed
EE
Memory anomaly
Table 16-1 - Alarm Signals