OPERATING AND MAINTENANCE MANUAL
Chapter 7 - Electronic controller
iC 215 ÷ iC 780
38
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
ENGLISH
EN
With the unit in StbY (stand-by) and the E LED flashing, press and scroll with or to select the ALrM function
and press button to display the active alarm.
7.11.2 How to mute the buzzer
The controller emits an audible signal to alert the operator to the presence of alarms (buzzer).
The buzzer is muted in the following ways:
• Automatic muting: the buzzer is muted when the situation that caused the alarm ceases.
• Manual muting: press and release one of the buttons; the buzzer will be muted even if the alarm condition
persists.
7.11.3 General alarms list
Alarm codes and indications are composed of letters and numbers that identify different alarm types.
The first letter of the alarm label identifies the type as follows:
• Letter A = unit alarm
• Letter b = circuit alarm
• Letter C = compressor alarm
The following tables contain a description of the alarms managed by the electronic circuit board. Some of the alarms
mentioned may not be referable to all unit models.
Outputs block
COD. alarm
Alarm
Description
Alarm reset
Alarm Trip
Compressor
Pump
Fan
Heaters
AP1 Probe PB1 fault alarm A I X X X(1)
AP2 Probe PB2 fault alarm A I X X X(1)
AP3 Probe PB3 fault alarm A I X X X(1)
AP4 Probe PB4 fault alarm A I X X X(1)
AP5 Probe PB5 fault alarm A I X X X(1)
AP6 Probe PB6 fault alarm A I X X X(1)
APE1 Probe PB1.. Probe Pb8 of I/O expansion A I X X X
APE2 Probe PB1.. Probe Pb8 of I/O expansion A I X X X
APE3 Probe PB1.. Probe Pb8 of I/O expansion A I X X X
APE4 Probe PB1.. Probe Pb8 of I/O expansion A I X X X
APE5 Probe PB1.. Probe Pb8 of I/O expansion A I X X X
APE6 Probe PB1.. Probe Pb8 of I/O expansion A I X X X
APE7 Probe PB1.. Probe Pb8 of I/O expansion A I X X X
APE8 Probe PB1.. Probe Pb8 of I/O expansion A I X X X
AEFL Evaporator water pump pressure switch or level sensor alarm A/M R X X(2) X X
AtE1 Evaporator water pump thermal cutout M I X(3) X X X(4)
AtE2 Evaporator second water pump thermal cutout M I X(3) X X X(4)
AEE EEprom alarm M I X X X
ALSF Phase sequence alarm (NOT USED) A I X X X X
ASLA LAN communication with I/O expansion alarm A I X X X
ALc1 Phase monitor alarm A/M I X X X
AEUn Evaporator inlet high temperature unloading indication A R
ACF1 Configuration alarm A I X X X
b(n)HP Circuit (n) high pressure switch (iC 215÷540 models only) A/M R X X
b(n)HP Circuit (n) high pressure switch and/or compressor thermal alarm (iC
640÷780 models only)
A/M R X X
b(n)LP
Circuit (n) low pressure switch A/M R X X
b(n)AC Anti-freeze in chiller circuit (n) A/M R X X
b(n)Ac
Signalling of anti-freeze in chiller circuit (n) A/M R
b(n)hP High condensing pressure transducer circuit (n) M I X
b(n)HP Low condensing pressure - (evaporation with low pressure transducer)
transducer circuit (n)
A/M R X
AEht Evaporator water inlet high temperature alarm M I X X
b1tF Circuit 1 fans thermal alarm M I X
b(n)rC Circuit (n) recovery disabled signalling A I
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