Nordmann AT4 - Remote Operating and Fault Indication; Notes on the Operation at Ambient Temperatures ≤ 0°C; Inspections During Operation

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4.2.2 Remote operating and fault indication
If your unit is equipped with the optional operating and fault indication PCB
(option “RFI”) the following operating status are shown remotely:
Activated remote
indication relay
When? Display on unit
“Error” A error is present, further operation is
normally not possible any longer, the
heating voltage is interrupted.
Red LED lights and an
error message is shown
in the display.
“Service” The steam cylinder is spent and must be
replaced. The unit remains operational
for a certain time.
Yellow LED lights and
the service message is
shown in the display.
“Steam” Steam demand/Steam production Green LED lights and the
standard operating dis
play is shown.
“Unit on” Unit is switched on. Unit switch lights and the
standard operating dis
play is shown.
4.2.3 Notesontheoperationatambienttemperatures≤0°C
If during operation ambient temperatures ≤ 0°C must be expected (opera
tion of the Nordmann AT4 in a protective housing outside the building), the
standby draining function must be set to “Full” and the period of time in
standby operation after which an automatic cylinder draining takes place
must be set to 1 hour (see chapter 5.4.8.3).
4.2.4 Inspections during operation
During operation the Nordmann AT4 and the humidication system have to
be inspected weekly. On this occasion check the following:
• the water and steam installation for any leakage.
• the steam humidier and the other system components for correct xing
and any damage.
• the electric installation for any damage.
If the inspection reveals any irregularities (e.g. leakage, error indication)
or any damaged components take the Nordmann AT4 out of operation as
described in chapter 4.4. Then, contact your Nordmann representative.