Emerson Dixell iProChill IPC115D - Page 176

1592025050 iProChill v2.5 10D00 AG v1.3 GB 18.02.2016.docx iProCHILL 176/205
10.10 AIR/AIR UNIT LOW TEMPERATURE ALARM & ANTI-FREEZE ALARM IN HEAT PUMP MODE
Alarm code
b1AH-…b4AH (anti-freeze alarm in circuit n° 1..4 heat pump mode)
Display in keyboard
From DI: Antif/lo temp.C1 (DI - HP)-…Antif/lo temp.C4 (DI - HP)
From AI: Antif/lo temp.C1 (AI - HP)-…Antif/lo temp.C4 (AI - HP)
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 heat pump working mode and stand-by/OFF-remote
mode. And the circuit must be configured with compressors.
When unit just switch on, this alarm is detected only after AL43 delay past.
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
AL48 and check:
 If the unit is working in heat pump mode, when the selected probes value
<= AL41 set for AL44 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 anti-freeze temperature >= A41 set + AL42
differential.
 Unit OFF: Regulation probe for 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:
 Heat pump: AL45
 Unit OFF: the minimum between AL37 and AL45
Icon
flashing
Action
If AL46=0 only the compressors are switched off. The label alarm is signalled
by the alarm relay, buzzer and the heaters are not activated
If AL46=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
Regulators
Alarm
If AL46 = 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
It follows its regulation
Compressors
Off
Pump down solenoid valve
off