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Drum Level Low Alarm (one for each used)
This error message appears if either a level switch or level transmitter is putting out a signal that
indicates a low level of solution. This could mean that the level switch is either open or closed, or
that the level transmitter is indicating a volume below the user-programmed low alarm limit.
Possible
Causes
Corrective
Actions
Low chemical level.
Replenish chemical supply.
Level switch float is stuck.
Clean level switch.
Faulty level switch.
Remove level switch from drum and verify
that the switch opens and closes as the float is
moved up and down.
Incorrect setting of the low alarm limit
Go to the Level Input Page and make sure that
for the level transmitter.
the Low Alarm Limit is set for the correct
value.
Faulty level switch or transmitter wiring.
Correct wiring. Make sure that the level sensor
is attached to the same input as the one which
is defined for that drum in the Level Input
Page.
Incorrect setting of “Drum low when
Go to the “Level Input Page and verify that the
switch is open/closed” menu.
“Drum low when switch is” menu is set for
the proper selection. You can check the
operation of the switch by measuring between
the two wires with an ohmmeter. If there is
continuity between the wires when the float is
all the way down, the select “closed”.
Incorrect setting of the “Empty mA” menu.
Go to the Level Input Page and make sure that
the Empty mA setting matches the actual mA
of the transmitter when the tank is empty.
Faulty digital input circuit board.
If the switch is functioning, and it is wired
correctly, and the settings are correct, replace
the digital input board.
Faulty 4-20 mA input option circuit board.
If the level transmitter is putting out a mA
signal above the low alarm limit (as measured
by an ammeter) and is wired correctly, replace
the 4-20 mA input option board.
