Application guidelines
23
FRCC.PC.021.A5.22
Operating conditions
Alarms displayed by OCS and related taken
actions
Conditions
ACTION before condition runs out
Delay
ACTION once condition has run out
Cumulated
time
ACTION once the boundary
condition has run out
Area 1
no action
∞
no action
∞
NA
Area 2.1
WARNING W30
: “low suction pressure,
stop in 31 sec”
31s
ALARM A44
: “low suction pressure,
compressor stopped”
ACTION
: stop the compressor
RESTART
: back to normal range then
automatic reset and manual reset after 4
repeated occurrences in 24h.
250h
WARNING W45
: “250h
low suction pressure. Max
duration exceeded”
Area 2.2
WARNING W46
: “High compression
ratio, stop in 31sec”
31s
ALARM A31
: “High compression ratio,
compressor stopped”
ACTION
: stop the compressor
RESTART
: back to normal range then
automatic reset and manual reset after 4
repeated occurrences in 24h.
336h
WARNING W32
: “336h high
compression ratio. Max
duration exceeded”
Area 2.3
WARNING W33
: “Low pressure
difference, stop in 3min”
3 min
ALARM A34
: “Low pressure difference,
compressor stopped”
ACTION
: stop the compressor
RESTART
: value back to normal range
then automatic reset and manual reset
after 4 repeated occurences in 24h.
2100h
WARNING W35
: “2100h low
pressure difference. Max.
duration exceeded”
Area 3
WARNING W50
: “Compressor back to
starting area, stop in 3 min”
3 min
ALARM A36
: “compressor outside
envelope, compressor stopped”
ACTION
: stop the compressor
RESTART
: back to normal range then
automatic reset and manual reset after 4
repeated occurrences in 24h.
∞
NA
Area 4
ALARM A36
: “compressor outside
envelope, compressor stopped”
ACTION: STOP THE COMPRESSOR
RESTART:
back to normal range then
automatic reset and manual reset after
4 repeated occurrences in 24h.
0s
no action
0s
NA
Area 3
AND
[power
switched on]
WARNING W38
“compressor start
outside envelope, stop in 3min”
UNIT ACTION: GO TO THE
OPERATING ENVELOPE
.
3 min
ALARM A39
: “compressor start outside
envelope, compressor stopped”
ACTION
: stop the compressor
RESTART
: back to normal range then
automatic reset and manual reset after 2
repeated occurrences in 1h.
7500h
WARNING W40
: “7500h
starting mode-Max duration
exceeded”
Area 4
AND
[power
switched on]
ALARM A41
“no start because pressure
out of range”
ACTION
:no start
0s
no start
0s
no start
P disch >
604.8 psig
WARNING W47
: “Discharge pressure
close to HPS limit”
ACTION : UNLOAD THE UNIT
∞
no action
∞
NA
