Johnson Controls SABROE Unisab III Control User Manual

2.2.12 Full flow pump error (screw compressors)
The reason for the shutdown is that feedback of the full flow pump motor is not set/does not
disappear within the time set in the Full fl. Pump motor timer when the motor starts/stops
(i.e. the digital output full flow pump start is activated/deactivated) or that feedback from the
motor disappears even briefly during operation.
The shutdown functions as an alarm during operation i.e. after the prelubrication sequence
has been completed.
2.2.13 Cooling fan error
The shutdown is activated when feedback from the electrical cooling fan motor is not set/does
not disappear within the time limit set in the Full fl. Pump motor timer when the motor starts/
stops (i.e. the digital output cooling fan is activated/deactivated) or that feedback from the
motor disappears even briefly during operation.
2.2.14 Oil rectifier error
The reason for the shutdown is that suction gas superheat has not exceeded the value set in
Set point 1 before the Rect. Disable. timer has expired although the Oil rectifier configuration
has been set and the compressor is running.
2.2.15 Wrong starting number in sequence
The reason for the alarm is that two or more compressors have the same starting number and
the same system number.
2.2.16 Limiting suction pressure
The alarm indicates that the suction pressure limiter is active, i.e. the suction pressure is
within the limiter neutral zone or below the alarm limit.
2.2.17 Limiting discharge pressure
The alarm indicates that the discharge pressure limiter is active, i.e. the discharge pressure is
within the limiter neutral zone or above the alarm limit.
2.2.18 Limiting process out temperature
The alarm indicates that the process out temperature limiter is active, i.e. the process out
temperature is within the limiter neutral zone or below the alarm limit.
2.2.19 Limiting hot water
The alarm indicates that the hot water temperature limiter is active, i.e. the hot water tem-
perature is within the limiter neutral zone or above the alarm limit.
2.2.20 Limiting discharge temperature
The alarm indicates that the discharge pipe temperature limiter is active. See section
3.2. Limiting functions, High discharge pipe temperature.
2.2.21 Start-up limiter
SABflex and SABCube compressors (SAB 109→159)
The alarm indicates that the SSSTV valve is closed and that the speed might be limited to
1.000 [rpm] during start-up. This will be caused by too high external (or internal) suction
Alarms and shutdowns
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Engineering manual - Unisab III 1.10
001930 en 2014.09

Johnson Controls SABROE Unisab III Control Specifications

General

Brand	Johnson Controls
Model	SABROE Unisab III Control
Category	Control Systems
Language	English