Chapter 6 _______________________________________________________________ Maintenance
VAISALA _______________________________________________________________________ 151
Table 32 Error Messages
Humidity sensor
measurement malfunction.
Check the integrity of the humidity probe and the
probe cable. Clean the probe from dirt, water,
ice or other contaminants.
Humidity sensor short
circuit
Humidity sensor open
circuit
Check the integrity of the humidity probe and the
probe cable.
Temperature sensor open
circuit.
Temperature sensor short
circuit.
Check the integrity of the humidity probe and the
probe cable. Clean the probe from dirt water, ice
or other contaminants.
Temperature
measurement malfunction
Temperature sensor
current leak.
Internal transmitter failure. Remove the
transmitter and return the faulty unit to Vaisala
internal configuration
Internal transmitter failure. Remove the
transmitter and return the faulty unit to Vaisala
Service.
Internal EEPROM read
error
Internal EEPROM write
error
Add-on module 1 (or 2)
connection failure
Turn off the power and check the module
connection. Turn on the power.
Device internal
temperature out of range
Ensure that the operating temperature is within
the valid range.
Internal RAM memory or
software checksum error
Internal transmitter failure. Remove the
transmitter and return the faulty unit to Vaisala
Service.
Internal ADC reference
voltage out of range
reference voltage out of
Configuration switches for
analog output 1/2/3 set
Check and re-set the switches, see page 57.
Internal error in add-on
module 1 (or 2)
Disconnect the power and check the module
connection.
installed in incorrect add-
Disconnect the power and change the
communication module to another module slot.
module installed in add-on
Ensure that the module is compatible with the
DMT340.
Internal analog voltage out
of range
Internal transmitter failure. Remove the
transmitter and return the faulty unit to Vaisala
out of range
Check that the supply voltage is correct and the
power supply can provide enough power for the
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