16
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The air curtain monitors the fan speed,
power output and heatsink temperature. In
the event of a fault the red LED on the sec-
ondary PCB flashes:
The red LED flashes a number of times and
then pauses. The number of flashes de-
notes the fault.
When the air curtains are powered up in
standby mode, a green LED on the main
board shows that the 12V power supply is
working correctly:
When heat or cold blow is demanded the
secondary PCBs are powered. A second
LED on the main PCB shows that the second
12V power supply is working correctly:
A fault with the auxiliary power is indicated
by a flashing orange LED on the main PCB:
A green LED on the secondary PCBs shows
that they are receiving 12V power:
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The heater is equipped with electronic over
heat protection and also manually resetta-
ble over temperature cut-outs. There are
two cut-outs on each blower module on
the top of the heating element. The
HSAC-
E
and
HSACW-E
heaters have four cut-outs
in to-tal In the unlikely event of electronic
failure, the mechanical cut-outs will switch
off power to the heating element. In order
to reset cut-outs, isolate the heater from
power and press small plastic push button
on the top of each cut-out.
The cause of
cut-outs operating should be investigated
before resetting.
Содержание HSAC12000E
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