39.30 B1EU – B2EU: UNLOADING FROM LOW TEMPERATURE OF THE EVAPORATOR
WATER OUTLET
Label on the display b1EU Unload signalling from evaporator circuit n° 1
b2EU Unload signalling from evaporator circuit n° 2
Origin During normal running condition when the temperature of evaporator water outlet is lower than
CO38 setpoint
Reset
If the water temperature is higher than CO38 + CO39 (differential)
With unloading ON after the CO40 time delay
Restart
Automatic
Icon
Blinking
Action
Alarm relay + buzzer
Regulation
Compressor
OFF
Other loads
Not modified
39.31 C1HP - C2HP COMPRESSOR HIGH PRESSURE ALARMS
Label on the display
C1HP ( compressor high pressure alarm 1) – C2HP (compressor high pressure alarm 2)
Origin
The unit is running and the digital input of the compressor high pressure switch is active
Reset
Digital input not active
Restart
Manual: reset procedure in Menu function
Icon
blinking
Action
Alarm Relay + and buzzer on
Regulation
Compressor
OFF
Other loads
Not modified
39.32 C1OP - C2OP PRESSURE SWITCH ALARM / COMPRESSOR OIL
Label on the display
C1oP (Compressor pressure switch #1) … C2oP (Compressor pressure switch #2)
Origin
The alarm is not signalled during the AL11 delay after turning on the compressor.
The alarm is signalled if the digital input is active for AL12 seconds
Reset
Digital input not active
Restart
Automatic - Manual after AL13 events per hour (Reset procedure in Menu function)
Icon
Blinking
Action
Alarm Relay + and buzzer on
OIL ALARM FROM PRESSURE SWITCH OR OIL LEVEL SWITCH (screw)
Occasionally it is possible to find both the safety systems, the delay, the active input duration and the number of events per hour allow
to set-up both the protections.
Par. AL11 Oil alarm delay after on compressor.
It allows to set a time delay before signalling the oil or the oil level switch alarms after the on compressor.
Par. AL12 Duration of the pressure switch / oil level switch in normal operating conditions.
Duration of the oil level switch activation during normal running condition.
It allows to set the time delay before signalling the alarm. AL11 defines the delay counting, it helps to override the low pressure or the
low oil level determined, for example, by a new partialization step of the compressor itself.
Par. AL13 Maximum number of alarm events per hour.
It determs the maximum number of alarm events before switching the restart from automatic to manual.
39.33 C1DT - C2DT HIGH COMPRESSOR DISCHARGE TEMPERATURE ALARM
Label on the display
C1dt (High discharge temperature of the compressor #1) -…C2dt (High discharge temperature of
the compressor #2)
Origin
The compressor discharge temperature is higher than AL49 setpoint.
ATTENTION
The display resolution is 0.1°C until the read-out is 99.9, over 100°C it is 1°C.
Reset
If the probe value of the high discharge temperature is lower than “AL49 – AL50”
Restart
Automatic. Manual when there are AL51 per hour (Reset procedure in Menu function).
Icon
Blinking
Action
Alarm Relay + and buzzer on
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