OPERATING AND MAINTENANCE MANUAL
Chapter 7 - Electronic controller
iC 215 ÷ iC 780
41
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
EN
ENGLISH
7.11.12 Chiller mode anti-freeze alarm
7.11.13 Water differential pressure switch alarm
Each time the water pump is started the water differential pressure switch alarm is disregarded for time AL15 to allow the
hydraulic circuit to reach steady state conditions. In normal operating conditions, if the pressure switch is in alarm for time
AL17 the compressor is stopped and label AEFL is displayed: the water pump continues to run for additional time AL16
after which, if the pressure switch is still in alarm, the pump is stopped.
At this point the alarm persists with manual reset so it must be reset manually.
Parameter AL18 is the time for which the pressure switch must not be in alarm in order to allow a reset.
Activation of alarm relay + buzzer occurs only if the water differential pressure switch alarm is active during a normal
operating stage. Otherwise exclusively an illuminated signal is generated (flashing icon).
The alarm is always automatic reset with the unit in stand-by or remote OFF (pump stopped).
Water differential pressure switch alarm manual reset:
If the alarm features manual reset, to reset it the operator must open the functions menu (reset procedure in functions menu).
7.11.14 Compressors thermal alarm
Chiller Operation
Display labels meaning b1AC (chiller mode circuit 1 anti-freeze alarm)
b1Ac (chiller mode circuit 1 anti-freeze alarm indication)
With the alarm active and a dual circuit unit both the labels are displayed
(b1AC-b2AC/b1Ac-b2Ac).
Cause of trip In operation and in stand-by remote OFF, if the anti-freeze control probe detects
a temperature < set AL26 for at least AL28 seconds.
Reset Anti-freeze control probe detects a temperature > set A26 + differential AL27.
Reset Automatic - becomes manual after AL29 trips / hour (reset procedure in
functions menu).
Icon Flashing E
Action The compressors are stopped and the alarm label is displayed (b1AC b2AC)
and the Alarm relay + buzzer are activated
Display labels meaning AEFL (water differential pressure switch or level sensor alarm)
Cause of trip The alarm is not acknowledged for time AL15 after starting of the water pump.
Alarm signalled if ID active for time AL17.
Reset ID not active for time AL18
Reset Automatic - becomes manual if ID active for time AL16 counted at expiry of
AL17 (reset procedure in functions menu)
Icon Flashing Flow!
Action Alarm relay + buzzer activated only if the water differential pressure switch
alarm is active during a normal operating stage.
Display labels meaning C1tr (compressor 1 thermal alarm) -…C4tr (compressor 4 thermal alarm)
Cause of trip With digital input active.
The alarm is not acknowledged for AL19 after compressor start.
Reset If ID inactive
Reset Manual from menu ALrM with password request
Icon Flashing E
Action Alarm relay + buzzer activated
To Next Page
Loading...