Emerson Dixell iProChill IPC115D Application Manual page 175

10.9 AIR/AIR UNIT LOW TEMPERATURE ALARM & ANTI-FREEZE ALARM IN CHILLER MODE
Alarm code
Display in keyboard
Cause of activation
Reset
Reset
Icon
Action
Regulators
Alarm
Reverse valve
Recovery valve
Free-cooling on/off valve
Auxiliary relay
Idle running valve
Supply ventilation
Condensation ventilation
Support/boiler/anti-freeze
Support/boiler/anti-freeze
Pump/and water evaporator
and condenser
Compressors
Pump down solenoid valve
1592025050 iProChill v2.5 10D00 AG v1.3 GB 18.02.2016.docx
b1AC-...b4AC (Low temperature/anti-freeze alarm in circuit n° 1..4 chiller
mode)
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)
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.
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.
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
flashing
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
If AL38 = 1 Relay + buzzer activated + anti-freeze heaters
it follows its regulation
it follows its regulation
it follows its regulation
It follows/they follow its/their regulation
It follows its regulation
If air/air unit off
It follows its regulation
If air/air unit off otherwise follows its regulation
With DI alarm activated
They follow their regulation
Off
Off
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