Walchem WebAlert WA500, Инструкция по эксплуатации

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7.0 TROUBLESHOOTING
7.1 ERROR MESSAGES
“<Input Name> (AI_#) Input” High or High-High Alarm (one for each, use name defined)
This error message is caused by the 4-20 mA signal from a transmitter exceeding the user-programmed
value for the high alarm limit.
Possible Causes Corrective Actions
The process value being measured by the Determine the reason for the out of spec transmitter
transmitter is out of specifications condition.
.
The high alarm limit for the process being
Increase the high limit in the Other 4-20 mA
measured is set too low. Input Page.
There is a problem with the transmitter that
needs to be addressed by the manufacturer of
the transmitter.
“<Input Name> (AI_#) Input” Low or Low-Low Alarm (one for each, use name defined)
This error message is caused by the 4-20 mA signal from a transmitter being lower than the user-
programmed value for the low alarm limit.
Possible Causes Corrective Actions
The process value being measured by the Determine the reason for the out of spec transmitter
transmitter is out of specifications. condition.
The low alarm limit for the process being
Decrease the low limit in the Other 4-20 mA
measured is set too high. Input Page.
There is a problem with the transmitter that
needs to be addressed by the manufacturer of
the transmitter.
<Input Name> (AI_#) Sensor Error
This error message is caused by a 4-20 mA input signal that is less than 3.9 mA or greater than 21 mA.
Possible Causes Corrective Actions
Faulty transmitter. Make sure that the transmitter is functioning
by measuring the output using an ammeter. If the
output directly from the transmitter is less
than 4 mA, the transmitter is the problem.
Faulty wiring between transmitter and
Repeat the measurement of the transmitter
analog input. output at the 4-20 mA input option board
terminal strip. If this is less than 4 mA, then the
wiring is faulty. Also make sure that the
wires are attached to the correct terminals as
defined in the 4-20 mA Input Page.
Faulty analog input.
Replace the Process Monitor board.