User's Guide ______________________________________________________________________
122 _________________________________________________________________ M210796EN-A
Table 18 Error Messages
Error Message Action
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 Check the integrity of the humidity probe and the probe
cable. Clean the probe from dirt, water, ice or other
contaminants.
Humidity sensor open circuit Check the integrity of the humidity probe and the probe
cable.
Temperature sensor open
circuit.
Check the integrity of the humidity probe and the probe
cable.
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
Check the integrity of the humidity probe and the probe
cable. Clean the probe from dirt water, ice or other
contaminants.
Temperature sensor current
leak.
Check the integrity of the humidity probe and the probe
cables. Clean the probes from dirt, water, ice or other
contaminants.
Internal ADC read error Internal transmitter failure. Remove the transmitter and
return the faulty unit to Vaisala Service.
Internal EEPROM read error Internal transmitter failure. Remove the transmitter and
return the faulty unit to Vaisala Service.
Internal EEPROM write error Internal transmitter failure. Remove the transmitter and
return the faulty unit to Vaisala Service.
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.
Operating voltage out of
range
Ensure that the operating voltage is within the valid range.
Internal analog voltage out of
range
Internal transmitter failure. Remove the transmitter and
return the faulty unit to Vaisala Service.
Internal system voltage out of
range
Internal transmitter failure. Remove the transmitter and
return the faulty unit to Vaisala Service.
Internal ADC reference
voltage out of range
Internal transmitter failure. Remove the transmitter and
return the faulty unit to Vaisala Service.
Internal analog output
reference voltage out of
range
Internal transmitter failure. Remove the transmitter and
return the faulty unit to Vaisala Service.
Configuration switches for
analog output 1/2/3 set
incorrectly
Check and re-set the switches, see page 55.
EEPROM failure on add-on
module 1 (or 2)
Disconnect the power and check the analog output module
connection.
Communication module
installed in incorrect add-on
module slot
Disconnect the power and change the communication
module to another module slot.
Unknown/incompatible
module installed in add-on
module slot 1(or 2)
Ensure that the module is compatible with the PTU300.
Pressure measurement Disconnect power and check pressure module connection.
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