Display Unreadable; Figure 48 Diagnostic Led Functions - Vaisala PR-23 Series User Manual

POWER
DISPLAY
KEYBOARD
~
Power supply
module
G
A
R
G
B
R
H1 interface card
Figure 48 Diagnostic LED functions
9.1.3 Display unreadable
If the display is unreadable because of extreme display backlight and contrast settings or
wrong display language, you can perform a display reset. A display reset temporarily
restores the display backlight and contrast to their factory settings and returns the display
language to English.
For the display reset, access the DTR keyboard directly. Then perform the following steps.
1. Switch off the DTR power.
2. Press and hold the decimal point key on the keyboard.
3. Switch on the DTR power.
G
24 V DC
LD1
LD2
LD3
LD4
Transmitter processor card
Y
Y
24 V/3 V
DC/DC
G D23
D26
D25
mA outputs
Transmitter motherboard
Chapter 9 – Troubleshooting
3 V DC
G D16
Y D17
Relay 1
G
Relay 2
G
91