1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 113 of 149
b1AH - b2AH Anti-freeze alarm / Low outlet air temperaure(Air/Air unit only) on heat pump
mode
Label on alarm
visualization menu
b1AH
(anti-freeze alarm of the circuit #1 in heat pump)
b2AH
(anti-freeze alarm of the circuit #2 in heat pump)
b1Ah
(anti-freeze alarm signalling of the circuit #1 in heat pump)
b2Ah
(anti-freeze alarm signalling of the circuit #2 in heat pump)
Both the labels are displayed when the alarm is coming from the evaporator
inlet probe or evaporator common outlet probe or when there is only one digital
input configured.
Origin
Normal conditions, stand-by, remote OFF: when the anti-freeze probe value is
lower than AL33 for AL36 seconds.
With the anti-freeze digital input is active.
Reset
When the anti-freeze probe value is higher than AL33 + AL34.
With digital input ont active
Restart
Automatic – Manual after AL37 events per hour (Reset procedure in Menu
function).
If AL74=1 to reset the alarm is necessary to type the password
Symbol
On the display the symbol
is blinking
Action
If AL38=0 only the compressors are turned off and than display shows
b1Ah -
b2Ah,
the buzzer and the alarm relay are not activated.
If AL38=0 only the compressors are turned off and than display shows
b1AH -
b2AH,
the buzzer and the alarm relay are activated.
If the alarm comes from the digital input also the anti-freeze heaters are turned
on.
Attention
Par.
AL35
anti-freeze alarm delay (low outlet air temperature air/air unit) when the unit starts in heat pump
mode.
In stand-by or remote OFF: there is an anti-freeze alarm and the time delay in AL35>0, if the unit is manually
turned on in heat pump from keyboard or remote input, the alarm is reset so the unit can start at least for the
time set in AL35 in order to heat the water or the air. After the AL35 delay if the anti-freeze probe is still lower
than AL33 setpoint for AL36 seconds the unit is locked again with an anti-freeze alarm.
b1hP - b2hP High pressure / Condensing High temperature of the Circuit
Label on alarm
visualization menu
b1hP
(high pressure digital input of the circuit #1)
b2hP
(high pressure digital input of the circuit #2)
Origin
In chiller or heat pump, if the condensing probe is higher than AL09 setpoint.
Reset
If the condensing probe value is lower than AL09 –AL10 (differential)
Restart
Reset procedure in Menu function.
Always manual AL54 = 0
Always automatic AL54 =16
From manual to utomatic if AL54 value is between 1 and 15
Symbol
On the display the symbol
is blinking
Action
Alarm Relay + and buzzer on
Regulation
Condensing fan
If FA02=0 the fan is forced at maximum speed for 60 seconds then switched
off
If FA02=1 the fan is forced at maximum speed for 60 seconds then regulate
according to normal fan regulation
b1LP - b2LP low pressure switch circuit #1 or 2
Label on alarm
visualization menu
b1LP
(low pressure switch circuit #1)
b2LP
(low pressure switch circuit #2)
