Johnson Controls SABROE UniSAB III Engineering Manual page 310

Starting screw compressor/prelubrication in MANUAL mode, continued
No
Error mes-
sage in oil
system?
Yes
Check wiring connection
to oil float. When float/
level switch has been
activated, digital input di-
ode no. 5 will turn on.
No
Correct wiring
Connection
connect.
OK?
Yes
Check float/level
switch function
Check pre-fuses and control voltage of
pump motor guard.
Fig. 55: Error diagram no. 3
2
Press to start compressor.
Light diode on front flashes green.
Oil pump
Yes
starts?
No
3
PMS
Yes
error mes-
sage re-
ceived?
No
Apply jumper, or check con-
nections from terminals
(X12/17-18) to power man-
agement system.
Digital output
No
Prelub pump is
activated.
Digital output diode
no. 2
is on?
Yes
Check connection from terminals (X12/
3-4) to oil pump motor starter
No
Connection
OK?
Yes
Check if feedback is received on termi-
nals (X3/3-4) from pump motor guard.
Digital input diode no. 2 is on
Yes
No
Connection
OK?
310/346
Check that input Starting request feed-
back, terminals (X3/19-20), is closed.
Digital input diode no. 5 is on. Can also
be checked in picture Service/Diagnosis/
Hardware/Digital input/PMS feedback = 1.
No Yes
Input
closed?
Check that Setup/Configuration/
Oil system/Oil pump = Yes.
Correct wiring
connection
Correct wiring
connect.
Engineering manual - UniSAB III 1.10.8
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001930 en 2021.06