Carel humiFog direct DLA02DF000, User Manual

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35
ENG
"humiFog direct" +0300073EN rel. 1.2 - 02.05.2019
10. ALARM TABLE
The following table shows the alarms that can be displayed, with the corresponding description, causes and possible solutions.
Alarm Code Cause Possible solution Reset Alarm relay Action
Circuit breaker ABA01 High current due to
overload or short-
circuit
Check:
• that the circuit breaker is set corresponding to the red
dot marked by the manufacturer (+15% rated current
motor);
• there are no short-circuits;
• that room temperature where the cabinet is installed
meets specifications;
• that the pump shaft is not obstructed;
• that maintenance has been performed on the unit at
regular intervals as described in this manual.
Manual Active Shutdown
High pressure switch ABA02 Water pressure at the
outlet > 90 bars
The alarm corresponds to the opening of the high
pressure switch. Check:
• 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 bars;
• that there are no blockages in the outlet line;
• correct calibration of the mechanical bypass valve on
the pump.
If necessary, replace the high pressure switch.
Manual Active Shutdown
High press. on probe RHP ABA03 Water pressure at the
outlet > 80 bars
The alarm corresponds to a pressure reading by probe
RHP > 80 bars (screen C01). Check:
• that probe RHP is correctly connected to terminals
J3.3-J3.5 and receives power from J3.1;
• that there are no blockages in the outlet line;
• correct calibration of the mechanical bypass valve on
the pump.
If necessary, replace probe RHP.
Manual Active Shutdown
Low press. on probe RHP ABA04 Water pressure at the
outlet < 20 bars for
more than 30 s with
pump running
The alarm corresponds to a pressure reading by probe
RHP < 20 bars (screen C01). Check:
• that probe RHP is correctly connected to terminals
J3.3-J3.5 and receives power from J3.1;
• that there are no leaks in the outlet line;
• correct closing of the drain solenoid valve in zone
DR1/DR2 and bypass drain valve BYP (NO valves, 24
Vac to close);
• that filling is enabled for a duration suitable for the
length of the water line.
If necessary, replace probe RHP.
Manual Active Shutdown
High bypass press. ABA05 Water pressure in
bypass > 8 bars or
alarm ALA06 activated
more than 3 times in
1 hour
Possible return of pressurised water through the bypass.
Check:
• that the bypass drain solenoid valve BYP is able to
drain water;
• correct operation of the mechanical overflow valve
(opens at 4 bars).
If necessary, replace the bypass drain solenoid valve BYP
and/or the overflow valve.
Manual Active Shutdown
High bypass temp. ABA06 Water temperature in
bypass > 65°C
Possible extended recirculation of water through the
bypass. Check:
• that the humidification capacity set on screen Dc18 is
equal to the no. of nozzles x capacity of each nozzle;
• that the zone can deliver a flow-rate of water ≥ the
minimum flow-rate supplied by the pump;
• that the NTC probe is connected to terminals J5.2-J5.3
Manual Active Shutdown
Very high bypass temp. ABA07 Water bypass
temperature > 65°C
• Possible extended water recirculation through the
bypass. Check: - that the humidification capacity set
on screen Dc18 is equal to the number of nozzles
multiplied by the capacity of each nozzle; - that the
zone can deliver a water flow-rate ≥ the minimum
flow-rate supplied by the pump; - that the NTC probe
is connected to terminals J5.2-J5.3
Manual Active Shutdown
Low press. on probe LPS ABA09 No water or feedwater
pressure < 0.3 bars
Possible absence of feedwater or low feedwater pressure.
Check:
• that there is no alarm on the reverse osmosis system
upstream of humiFog Direct
• that there is an expansion vessel or storage vessel with
suitably calibrated pump upstream of humiFog Direct.
• operation of the fill solenoid valve.
Manual /
automatic
Active Shutdown
(The unit
periodically
performs
up to 30
attempts to
restart auto-
matically)