USER MANUAL – Release 1.2 of 01/01/2010 Page 156 of 191
57.5 LOW PRESSURE PRESSURE SWITCH ALARM
LP1…LP4 (circuit n° 1…4 low pressure pressure switch alarm)
• With circuit low pressure pressure switch active
• If AL08=1, also with unit in stand-by or OFF remote, if circuit low pressure
pressure switch input active
• In defrost if AL06=1 if compressor low pressure pressure switch input
active
The alarm is not signalled:
1. in defrost for time AL07 in correspondence with activation of the reverse
valve cycle
2. On compressor switch-on for the time AL01
3. AL02 = 0 the low pressure alarm is inhibited during compressor stopping in
pump down mode and with compressor at a standstill
4. AL02 ! 0 the low pressure alarm is inhibited during compressor stopping in
pump down mode and with compressor at a standstill for the time set
Automatic – it becomes manual after AL05 interventions/hour (reset procedure
in functions menu)
Alarm relay + buzzer activated
it follows its regulation
it follows its regulation
Free-cooling on/off valve
it follows its regulation
It follows/they follow its/their regulation
0÷10V proportional output
It follows/they follow its/their regulation
It follows its regulation
It follows its regulation
Support/boiler/anti-freeze
It follows its regulation
Pump/and water evaporator
and condenser
It follows its regulation
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