CT-600-2 91
14 Alarms and warnings overview
14.1 Overview of alarms and warnings in ACP LINK PLC/HMI
No. Alarm / warning description Related
function
Possible causes
1 Suction pressure low 2.1 Too little load / too much capacity
Suction stop valve(s) (partly) closed
2 Suction pressure high 2.2 Too high load / too low capacity
Plant in start-up phase
3 Discharge pressure low 2.3 Condenser control problem
4 Discharge pressure high 2.4 Condenser capacity too little
Condenser control problem
Discharge stop valve(s) (partly) closed
5 Pressure ratio high 2.5 Combination of 1 and 4
6 Pressure difference low 2.6 Condenser control problem
Low ambient temperature
Plant in start-up phase
Issue with KDC or related solenoid valves
7 Lubricating pressure low 2.7 Combination of 6 and 8
8 Oil system pressure drop high 2.8 Oil cooler pressurer drop high
Valve(s) in oil system (partly) closed
Main oil filter pressure drop high (9)
9 Main oil filter pressure drop high 2.9 Main oil filter needs replacement
10 Suction superheat low 2.10 Liquid in suction line
Delay in temperature signal and rapid pressure
change
11 Suction superheat high 2.11 Too little liquid in evaporator
Oil in suction line
Plant in start-up phase
12 Suction pressure sensor
difference high
1.5 Sensor or connection error
Suction stop valve(s) (partly) closed
13 Suction pressure sensor error 2.2 Sensor or connection error
Mismatch between temperature and pressure signal
in suction header line
14 Discharge pressure sensor
difference high
1.5 Sensor or connection error
Discharge stop valve(s) (partly) closed
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