dIXEL IPC400D SERIES - Oil Float;Pressure Switch Alarm

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USER MANUAL – Release 1.2 of 01/01/2010 Page 157 of 191
Version: 02/03/2010
57.6 OIL FLOAT/PRESSURE SWITCH ALARM
Display label meaning
OPC1…OPC16 (compressor n°1…16 oil pressure switch alarm)
Cause of activation
The alarm is not signalled: on compressor switch-on for the time AL12. After
time AL12 it is not signalled with unit in normal working conditions for time
AL13
Reset
Input deactivation
Reset
Automatic – it becomes manual after AL14 interventions/hour (reset procedure
in functions menu)
If AL15 = 0 the alarm is not detected with the compressor off
Icon
flashing
Action
Alarm relay + buzzer activated
Regulators
Alarm
Relay + buzzer activated
Reverse valve
it follows its regulation
Recovery valve
it follows its regulation
Free-cooling on/off valve
it follows its regulation
Auxiliary relay
It follows/they follow its/their regulation
0÷10V proportional output
It follows/they follow its/their regulation
Idle running valve
It follows its regulation
Flow ventilation
It follows its regulation
Condensation ventilation
It follows its regulation
Support/boiler/anti-freeze
It follows its regulation
Pump/water evaporator and
condenser
It follows its regulation
Compressors affected
Off
Compressor not affected
It follows its regulation
Pump down solenoid valve
It switches-off if there is only 1 compressor per circuit, otherwise it follows its
regulation
OIL ALARM WORKING DUE TO PRESSURE SWITCH OR FLOAT (SCREW)
It is possible that both safety systems can exist together in certain applications. The delay, the active input
duration and the number of interventions per hour are used to correctly manage the two safety devices.
Par. AL12
Oil alarm delay due to compressor activation
Allows to set a delay in recognising the alarm of the pressure switch and the float from compressor start-up.
Par. AL13
Float pressure switch input active duration in normal working conditions
Allows to set a time during which the oil alarm must remain active in normal working conditions. The alarm is
signalled after this time. The count starts after the AL13 time. It allows to filter any pressure or oil level drops
that may occur for brief moments, e.g. with the activation of a compressor partialisation step.
Par. AL14
Maximum number of oil alarm interventions per hour
It determines a maximum number of oil alarm interventions per hour. When these are exceeded the alarm
passes from automatic to manual reset.
Par. AL15
Oil float/pressure switch alarm with compressor in OFF if a differential oil pressure switch is used
0 = alarm detection not enabled
1= alarm detection enabled