Emerson Dixell iProChill IPC115D - Page 175

1592025050 iProChill v2.5 10D00 AG v1.3 GB 18.02.2016.docx iProCHILL 175/205
10.9 AIR/AIR UNIT LOW TEMPERATURE ALARM & ANTI-FREEZE ALARM IN CHILLER MODE
Alarm code
b1AC-…b4AC (Low temperature/anti-freeze alarm in circuit n° 1..4 chiller
mode)
Display in keyboard
From DI: Antif/lo temp.C1 (DI - CH)-…Antif/lo temp.C4 (DI - CH)
From AI: Antif/lo temp.C1 (AI - CH)-…Antif/lo temp.C4 (AI - CH)
Cause of activation
In air/air unit, the low temperature alarm is detected. In other types of unit,
antifreeze alarm is detected.
It is detected both in chiller working mode and stand-by/OFF-remote mode.
And the circuit must be configured with compressors.
From DI: Antifreeze alarm circuit 1…4 (DI type=6…9). If only one DI
configured, it will be used for all the 4 circuits.
From AI: Select probes between evaporator probes(AI type=17…22) by par
AL47 and check:
 If the unit is working in chiller mode, when the selected probes value <=
AL34 set for AL36 time, alarm occur.
 If the unit is in stand-by/OFF-remote mode, chose the highest value
between AL34 and AL41 as SET, when the selected probes value <= SET
set for AL36/AL44 time, alarm occur.
Reset
From DI: DI deactivate
From AI:
 Unit ON: Regulation probe for Pbr anti-freeze temperature >= AL34 set +
AL35 differential.
 Unit OFF: Regulation probe for Pbr anti-freeze temperature >=
(AL34/AL41) set + (AL35/AL42) differential.
Reset
Automatic – becomes manual after certain number of interventions/hour (reset
procedure in functions menu)
This number can be:
 Chiller: AL37
 Unit OFF: the minimum between AL37 and AL45
Icon
flashing
Action
If AL38 = 0 only the compressors are switched off. The label alarm is signalled
by the alarm relay, buzzer and the heaters are not activated
If AL38 = 1 the compressors are switched off. The label alarm is signalled and
the alarm relay + buzzer are activated. If the anti-freeze alarm comes from DI
the anti-freeze heaters are also activated.
Alarm relay DO type=184…187
Regulators
Alarm
If AL38 = 1 Relay + buzzer activated + anti-freeze heaters
Reverse valve
it follows its regulation
Recovery valve
it follows its regulation
Free-cooling on/off valve
it follows its regulation
Auxiliary relay
It follows/they follow its/their regulation
Idle running valve
It follows its regulation
Supply ventilation
If air/air unit off
Condensation ventilation
It follows its regulation
Support/boiler/anti-freeze
If air/air unit off otherwise follows its regulation
Support/boiler/anti-freeze
With DI alarm activated
Pump/and water evaporator
and condenser
They follow their regulation
Compressors
Off
Pump down solenoid valve
Off