Emerson XEV22D Specifikace stáhnout pdf (Strana 22)

16 • XEV22D I&O Manual 026-1206 Rev 0 09-FEB-2011

14 Display Messages

14.1.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 re-

turns 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 digi-

tal inputs config-

ured as CCL are

activated

Valve closed

Pf The PEd time is

elapsed and the

regulation is

stopped.

Valve closed after

PEd. There is a probe

error.

P1 Temperature

probe fault

According to PEo

and PEd

P2 Pressure transduc-

er fault

According to PEo

and PEd

HSH High superheat

alarm

By PI

LSH Low superheat

alarm

Valve closed

LPL Low pressure lim-

See LPL parameter

MOP Maximum Oper-

ating Pressure

See dML parameter

LOP Lowest Operat-

ing Pressure

See dML parameter

StF Start Function en-

abled

See SFd parameter

StP Regulation stop

caused by Std and

Sti

Valve closed

EE Memory anomaly

Table 14-1 - Alarm Signals

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 28 29 30

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