HE 5731 Operating instructions
38
# 373344, Version 1.5
Error messages
9. Error messages
Display
Cause
Action
“buS” is blinking in the
display, the alarm LED
is illuminated
The sum of the valves set on
the devices is smaller than
the set total valve number
Check the set total valve
number
Check the valve number
set on the coding switch
Check cabling of the in-
terface and power sup-
ply. (Terminals 29-34 as
well as + and
– on the
extensions)
„d r x*“ flashes in the
display
*x= 1, 2, 3 or 4 (device
number)
A slave device which is con-
nected the master valve con-
trol, has no pressure switch
function
x=device number of the af-
fected slave device
Update the software of
the Slave device
The differential pressure
display shows
The differential pressure sig-
nal is below the permissible
measuring range
Check differential pres-
sure
Check external cabling
on terminal 17-19 or
41,44,45
Eliminate possible inter-
ruption of the cabling
The differential pressure
display shows
The differential pressure sig-
nal is above the permissible
measuring range
Check differential pres-
sure signal
Check external cabling
on terminal 17-19 or
41,44,45
Eliminate possible inter-
ruption of the cabling
The LED
flashes. The display
shows the relevant
valve
No current flows through the
valve line
Check the wiring to the
indicated valve for inter-
ruption
Check the valve in
question
Check if the valve plug
is connected correctly.
