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USER MANUAL – Release 1.2 of 01/01/2010
Page 164 of 191
Version: 02/03/2010
57.13
HOT SIDE FLOW SWITCH ALARM (DIFFERENTIAL PRESSURE SWITCH)
Display label meaning
ACFL
(Condenser side flow switch alarm)
Cause of activation
(the flow switch alarm is only active in the units configured as air/water -
water/water)
ID active for the AL22 time from water pump start-up (alarm by-pass time),
after ID active for AL24 time
alarm disabled if AL21=0
Alarm only enabled in cooling working mode if AL21=1
Alarm only enabled in heating working mode if AL21=2
Alarm enabled in cooling and heating working mode if AL21=3
Reset
ID not active for the time AL25
Reset
Automatic – it becomes manual if ID remains active for time AL23 counted
from the expiry of AL24 (reset procedure in functions menu)
Icon
flashing
Action
Relay + buzzer only activated if the flow switch alarm is activated in normal
working phase
Regulators
Alarm
Relay + buzzer only activated if the flow switch alarm is activated in normal
working phase
Reverse valve
It follows its regulation
Recovery valve
It follows its regulation
Free-cooling on/off valve
It follows its regulation
Anti-freeze/Support/boiler
Off
Auxiliary relay
It follows its regulation
Supply ventilation
Off
Condensation ventilation
It follows its regulation
Condenser water pump
With PA17=1 always on; off when the alarm becomes manual reset
Condenser water pump
With PA17=2 follows its regulation; off when the alarm becomes manual reset
Evaporator water pump
It follows its regulation
Compressors
Off
Pump down solenoid valve Off
WARNING
Relay + buzzer are only activated if the flow switch alarm is activated in normal working phase.
