Vaisala PTB330 - Manual (Page 110)

USER'S GUIDE____________________________________________________________________
108 _________________________________________________________________ M210855EN-D
Figure 43 Error Indicator and Error Message
The number refers to Figure 43 above:
1 = Error Indicator
The error indicator disappears when the error state is over and you
have checked the error message. Press the INFO button to display the
error message.
You can also check the error message through the serial interface by
using the command ERRS. In case of constant error, please contact
Vaisala; see Technical Support and Product Returns on page 110.