11. Filter diff. high
1. SMC Mk4; during start-up and operation, the alarm for high oil filter differential pressure is
delayed for the indicated period of time.
2. For SMC Mk3 and earlier versions, this timer is not used.
12. Total unloading
When configured for total unloading, the compressor will stop if it has been running constantly
in 0% for the stated time.
13. Oil pressure low
During start and operation the shutdown for low oil pressure is delayed for the stated time.
14. Oil pressure high
During start the shutdown for high oil pressure is delayed for the stated time. No delay during
normal operation.
15. Oil temperature low
During start the shutdown for low oil temperature is delayed for the stated time. No delay
during normal operation.
If the start Oil temperature low delay is set to 0 (zero) seconds, the oil temperature shutdown
and alarm supervision will be set active during compressor standstill too preventing the com-
pressor from starting with too low oil temperature. However, the shutdown will be disabled
during the motor starting phase. This is to protect the motor.
16. Oil temp high
During start the shutdown for high oil temperature is delayed for the stated time. No delay
during normal operation.
17. Superheating low
During start the shutdown for low superheating is delayed for the stated time. No delay dur-
ing normal operation.
1. For discharge superheat
2. For suction superheat
18. Superheating high
During start the alarm for high superheating is delayed for the stated time. No delay during
normal operation.
19. Disch. pressure, overload
In case the discharge pressure is higher than the alarm limit within the stated time, the com-
pressor will stop.
20. Current overload
If the motor current or power is higher than the set point within the stated time, the compres-
sor will stop and an error message will appear.
Set-up
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Engineering manual - Unisab III 1.10
001930 en 2014.09
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