Carel DLAQ2DF100, User Manual

Page: 34 / 48

34
ENG
"humiFog direct" +0300073EN rel. 1.4 - 29.03.2022
12. ALARM
The following table shows the alarms that can be displayed, with the corresponding description, causes and possible solutions.
Alarm Code Cause Solution Reset Alarm relay Action
Magnetothermic ABA01 High overload or short
circuit current
Verify:
• that the magnetothermal switch is set to the red dot
marked by the factory (+15% rated motor current);
• the absence of short circuits;
• that the temperature of the environment where
the pumping station is installed is according to
specifi cation;
• that the rotation of the pump shaft is not hindered;
• that maintenance has been carried out on the pump
at regular intervals in accordance with this manual.
Manual Active Humidifi cation
interrupted
Pressure switch high P ABA02 Water pressure in
discharge > 90 bar
The alarm corresponds to the opening of the HP
pressure switch. Verify:
• that the pressure switch is correctly connected to
terminals J23-1-J23.2;
• that the pressure switch contact is closed if the
pressure is < 90 bar;
• the absence of obstructions in the delivery line;
• the correct calibration of the mechanical bypass valve
on the pump.
If necessary, replace the HP pressure switch.
Manual Active Humidifi cation
interrupted
High pressure RHP probe ABA03 Water pressure in
discharge > 80 bar
The alarm corresponds to a pressure reading from the
RHP probe > 80 bar (screen C01). Verify:
• that the RHP probe is correctly connected on
terminals J3.3-J3.5 and receives power from J3.1;
• the absence of obstructions in the delivery line;
• the correct calibration of the mechanical bypass valve
on the pump.
If necessary, replace the RHP probe.
Manual Active Humidifi cation
interrupted
Low pressure RHP probe ABA04 Water pressure in
discharge < 20 bar for
more than 30 s with
pump running
The alarm corresponds to a pressure reading from the
RHP probe < 20 bar (screen C01). Verify:
• that the RHP probe is correctly connected on
terminals J3.3-J3.5 and receives power from J3.1;
• the absence of leakage on the delivery line;
• the correct closing operation of the DR1/DR2 zone
discharge and BYP bypass discharge solenoid valves
(NO valves, 24Vac to close);
• that fi lling is enabled with a duration that is
appropriate to the length of the water line;
If necessary, replace the RHP probe.
Manual Active Humidifi cation
interrupted
High bypass pressure ABA05 Water pressure in
bypass > 8 bar or
ALA06 alarm triggered
more than 3 times in
1 hour
Possible return of pressurised water through the bypass.
Verify:
• that the BYP bypass discharge solenoid valve is
capable of discharging water;
• correct operation of the mechanical overfl ow valve
(opens at 4 bar).
If necessary, replace the BYP bypass discharge solenoid
valve and/or the overfl ow valve.
Manual Active Humidifi cation
interrupted
Very high bypass temper-
ature ABA07 Bypass water
temperature > 65°C
• Prolonged recirculation of water through the bypass
is possible. Verify: - that the humidifi cation capacity
set on the Dc18 screen is equal to no. of nozzles x
capacity of the single nozzle; - that the zone is able
to supply a water fl ow rate ≥ the minimum fl ow
rate supplied by the pump; - that the NTC probe is
connected to terminals J5.2-J5.3
Manual Active Humidifi cation
interrupted
Low pressure LPS probe ABA09 No water or water
pressure in feed <
0.3 bar
Possible lack of water in the inlet or low pressure in the
feed. Verify:
• that the alarm of the reverse osmosis system upstream
of humiFog direct is not going off
• that there is an expansion tank or storage tank with
booster pump properly calibrated upstream of the
humiFog direct.
• the functionality of the loading solenoid valve.
Manual /
Automatic
Active Humidifi cation
interrupted (The
unit periodically
performs up to
30 automatic
restart attempts)
High pressure fi ll/wash ABA10 Discharge pressure >
2 bar when fi lling or
fl ushing
Possible obstruction in the delivery line. Verify:
• correct opening of the zone load NC solenoid valves
(24Vac when they open);
• correct opening of the zone discharge NO solenoid
valves (0Vac when they open).
Manual Active Humidifi cation
interrupted
Disconnected LPS probe ABP05 LPS pressure
probe broken or
disconnected
Verify:
• that the LPS probe is correctly connected on terminals
J16.1-J16.2 and receives power from J3.1.
Replace the probe if necessary.
Manual Active Humidifi cation
interrupted