9
MAINTENANCE
TROUBLESHOOTING FLOWCHART (LCD version)
Unit Equipped
with Display?
Check Voltage at
Terminal Board
No Voltage?
Check Power
Supply and Wiring
Negative
Voltage?
Reverse Wiring
Call Factory
Check Loop
Current at terminal
Board
Loop Current
Above 23 mA?
Remove Electronic
Module
Loop Current
Above 1 mA?
Replace Terminal
Board
Replace Electronic
Module
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Display has
Text?
No
Reseat Boards.
Check Power
Supply and Wiring
Loop
Resistance
Wrong?
Correct Loop
Resistance
Start
Good
Display
No
Active
HART
Yes
Failure to Operate
with Correct Loop
Inputs
No
Faint Display?
Yes
Yes
No
Some problems could be
temporarily solved by power
cycling the unit. Please call
factory if this problem persists.
Display
Working?
No
Yes
No
Retest
Yes
HART
Communications
OK?
Voltage Above
36 Volts?
Voltage
< 11V IS or
14.5V XP?
2
1
3
See page 12
See page 11
Summary of Contents for KOTRON SMART RF 805
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