Yokogawa EJX930A - Manual (Page 27)

<4. Diagnostics>
4-2
IM 01C25R05-01EN
4.2 Alarms and Countermeasures
Table 4.1 Alarm Message Summary
Integral
Indicator
DTM
display
Status
group
Cause Countermeasure
Value and Status (Data Quality and Limit Status)
Differential
Pressure
(DP)
Static
Pressure
(SP)
External
Temperature
(ET)
DP % SP % ET %
AL.01
CAP.ERR
P sensor
error
1 Sensor problem. Replace
capsule if the
error recurs
after the
transmitter is
restarted.
Value: Hold value
Status: Bad and Constant
(0x30)
Value: Hold value
Status: Bad and Constant
(0x30)
CT sensor
error
Capsule
temperature
sensor problem.
Replace
capsule.
Value: Hold value
Status: Bad and Constant
(0x30)
Value: Hold value
Status: Bad and Constant
(0x30)
Cap
EEPROM
error
Capsule
EEPROM
problem.
Value: Hold value
Status: Bad and Constant
(0x30)
Value: Hold value
Status: Bad and Constant
(0x30)
AL.02
AMP.ERR
Amp
EEPROM
error
Amplifier
EEPROM
problem.
Replace
amplifier.
Value: Hold value
Status: Bad and Constant
(0x30)
Value: Hold value
Status: Bad and Constant
(0x30)
CPU board
error
2 Amplifier
problem.
Value: Hold value
Status: Bad and Constant
(0x30)
Value: Hold value
Status: Bad and Constant
(0x30)
ET module
Com error
4 Value: Hold value
Status: Bad and Constant
(0x30)
Value: Hold value
Status: Bad and Constant
(0x30)
ET module
error
Value: Hold value
Status: Bad and Constant
(0x30)
Value: Hold value
Status: Bad and Constant
(0x30)
AL.03
ET. ERR*
ET sensor
error
External
temperature
sensor
disconnection.
Check external
temperature
sensor.
Value: Hold value
Status: Bad and Constant
(0x30)
Value: Hold value
Status: Bad and Constant
(0x30)
*: When ET is set as “Fixed” or “Fall back”, this alarm does not occur.