Carel pCO2 Manual

Standard Chiller/HP modulare per compressore a vite con driver CAREL
Cod.: +030221241 Rel. 1.0 dated 25 September 03
43
20 Alarms
Alarms are divided into three categories
Warning-only alarms (only warning on display and buzzer, warning on display, buzzer, alarm relay)
Circuit alarms (only disable relevant circuit, warning on display, buzzer, alarm relay)
Serious alarms (disable whole system, warning on display, buzzer, alarm relay)
20.1 Serious alarms
• "No water flow" alarm
• Alarm: evaporator antifreeze with manual reset
• Serious alarm from digital input
• Phase monitor alarm
• Pump thermal cutout
20.2 Circuit alarms
• High pressure/pressure switch alarm
• Low pressure alarm
• Compressor thermal overload alarm
• Oil differential alarm
• Fan thermal overload alarm
• Unit disconnected from network alarm
• Pressure differential alarm
20.3 Warning only alarms
• Unit maintenance alarm
• Compressor maintenance alarm
• Clock card faulty or disconnected alarm
•
20.4 Pressure differential alarm management
Inputs used
• Low pressure transducer
• High pressure transducer
Parameters used
• Enable alarm
• Pressure differential set-point
• Alarm activation delay
Outputs used
• General alarm relays
• All compressor outputs
20.4.1 Description of operation
The alarm is based on the differential between high and low pressure probe readings If this differential drops below the set differential value, the
alarm is signalled and the compressor is powered down, according to the set delay.

Carel pCO2 Specifications

General

Brand	Carel
Model	pCO2
Category	Controller
Language	English