CHAPTER 3________________________________________________ INSTALLATION AND MAINTENANCE
VAISALA _________________________________________________________________________ 11
Self diagnostics
The GMT220 series transmitter goes through a continuous self-
diagnostic procedure. If any problems occur, it displays the
corresponding error message.
The transmitter without a display indicates problems by blinking the
LED lights. Non-critical instantaneous errors are shown with the green
operation LED and fatal errors with red LEDs, in addition the relays
switch ON.
If any error occurs, please check first that the probe is connected
properly. In case of a constant error, please contact either Vaisala or
your local Vaisala representative.
NOTE
Disconnection of the probe causes an error and relay activation.
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