Yokogawa EJX440A - Manual (Page 59)

<4. Diagnostics>
4-19
IM 01C25T01-01E
4.3 Alarms and Countermeasures
Table 4.3.1 Alarm Message Summary
Integral
indicator
HART communicator
display
Cause
Output operation
during error
Countermeasure
Status
group
AL. 01
CAP. ERR
P sensor error Sensor problem. Outputs the signal
(High or Low) set
with burnout direction
switch. [status output:
undefined]
Replace capsule when
error keep appearing
error even after restart.
1
CT sensor error Capsule temperature
sensor problem.
Replace capsule.
Cap EEPROM error Capsule EEPROM
problem.
AL. 02
AMP. ERR
AT sensor error Amplifier temperature
sensor problem.
Replace amplifier.
Amp EEPROM error Amplifier EEPROM
problem.
CPU board error Amplifier problem.
2 — No device ID No device ID is found. Continues to operate
and output.
AL. 10
PRESS
P outside limit Input is outside
measurement range
limit of capsule.
Outputs AO upper limit
or AO lower limit.
Check input or
replace capsule when
necessary.
3
AL. 11
ST. PRSS
SP outside limit Static pressure exceeds
limit.
Continues to operate
and output.
AL. 12
CAP. TMP
CT outside limit Capsule temperature is
outside range (–50 to
130°C).
Use heat insulation or
make lagging to keep
temperature within
range. AL. 13
AMP. TMP
AT outside limit Amplifier temperature
is outside range (–50 to
95°C).
AL. 30
RANGE
P over range Output is outside upper
or lower range limit
value.
Outputs AO upper limit
or AO lower limit.
Check input and range
setting, and change
them as needed. 4
AL. 31
SP. RNG
SP over range Static pressure exceeds
specified range.
Continues to operate
and output.
AL. 35
P. HI
P high alarm Input pressure exceeds
specified threshold.
Check input.
5
AL. 36
P. LO
P low alarm
AL. 37
SP. HI
SP high alarm Input static pressure
exceeds specified
threshold. AL. 38
SP. LO
SP low alarm
AL. 39
TMP. HI
CT high alarm Detected temperature
exceeds specified
threshold.
Check capsule
temperature.
AL. 40
TMP. LO
CT low alarm
AL. 50
P. LRV
Illegal P LRV Specified value is
outside of setting range.
Holds output
immediately before
error occurred.
Check settings and
change them as
needed.
6
AL. 51
P. URV
Illegal P URV
AL. 52
P. SPN
Illegal P SPAN
AL. 53
P. ADJ
P SPAN trim err Continues to operate
and output.
Adjust settings and
change them as
needed.
P ZERO trim err
AL. 54
SP. RNG
Illegal SP LRV Continues to operate
and output holding
static pressure in %.
Check settings and
change them as
needed.
Illegal SP URV
Illegal SP SPAN