Installation, Operating & Maintenance Manual
23
3.3 Alarms
In the event of an alarm, the alarm LED will flash, the alarm relay will close, and the alarm code will flash on the
Red LED. Multiple alarms will flash in sequence. The unit must be turned off and on to reset the alarms.
Controller
Action
P
Causes
Solution
P
Alarm
relay
1. Check the operation of the drain valve
2. Check for fill valve leakage
2 fast
flashes of
Red LED
Over-current at the electrodes;
probable electrode malfunction
or water conductivity
temporarily too high (especially
when starting after a short stop) 3. Drain part of the water and re-start
Shut-down
Active
Power not available;
3 fast
flashes of
Red LED no steam production when on
1. With the machine off and disconnected
from the main power, check the internal
electrical connections
Shut-down
Active
4 slow
flashes of
Red LED
Excessive reduction in output
1. Cylinder completely spent or water with
excessive foam. Perform maintenance on
the cylinder.
Shut-down
Active
1. Check that the fill pipe from the main to
the humidifier and the internal pipe are not
blocked or bent and that there is sufficient
pressure (0.1-0.8 mpa, 1-8 bar)
2. Check the operation of the fill valve
3. Check that the steam outlet is not
working against excessive back-pressure,
preventing the flow of water into the cylinder
by gravity
3 slow
flashes of
Red LED
Lack of water
4. Check that the steam outlet pipe is not is
kinked and that there are no sags.
Shut-down
Active
5 slow
flashes of
Red LED
Drain malfunction
Check the drain circuits and the correct
operation of the drain valve
Shut-down
Active
1. Reset the default parameters (see Chap.
7.5)
6 slow
flashes
CAREL or 4
fast flashes
Red LED
Internal memory error
2. If the problem persists, contact the CARE
service center
Shut-down
Active
2 slow
flashes Red
LED
Cylinder depleted signal
cylinder
Perform maintenance and/or replace the
only
Signal only
Not
active
With the machine off:
1. Check for any leaks from the fill valve or
the condensate return pipe
9 slow
flashes Red
LED
Cylinder full with machine off
signal
2. Check that the level sensors are clean
total shut-down
Shut-down
Active
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