Vaisala LT31 - Page 271

Chapter 7 ___________________________________________________________ Troubleshooting
VAISALA ______________________________________________________________________ 271
T20:Transmitter
Optics Unit LTO112;
alignment
mechanism
horizontal
underrange
T21:Transmitter
Optics Unit LTO112;
alignment
mechanism
horizontal overrange
–
T22:Transmitter
Measurement CPU
LTC112, general
EEPROM error
Replace Transmitter Measurement CPU
(see section Replacing Measurement
CPU/
Window Receiver on page 211).
T23:Transmitter
Measurement CPU
LTC112, window
receiver EERPOM
error
Check for proper cabling between
Transmitter Measurement CPU and
appropriate module.
Replace appropriate module (see sections
starting from Repair Instructions on page
201).
T24:Transmitter
Window Transmitter
LTL212; EEPROM
error
T25:Transmitter Main
Transmitter LTL112;
EEPROM error
T26:Transmitter
Measurement CPU
LTC112; window
temperature sensor
error
T27:Transmitter
Measurement CPU
LTC112; enclosure
temperature sensor
error
Replace Transmitter Measurement CPU
(see section Replacing Measurement
CPU/
Window Receiver on page 211).
T28:Transmitter
Measurement CPU
LTC112; Window
Receiver temperature
sensor error
T29:Transmitter
Window Transmitter
LTL212; temperature
sensor error
The Transmitter Measurement
CPU is unable to read or write the
appropriate EEPROM device
Check for proper cabling between
Transmitter Measurement CPU and
appropriate module.
Replace appropriate module ((see sections
starting from Repair Instructions on page
201).