16
41000664 Iss 05
9.1 General
If the air curtain does not operate after running
through the detail provided in Section 6, then a
suitably competent service engineer should be
called to identify the nature of the fault.
Note The manufacturer operates a service
function from the address provided in these
instructions.
All Air Curtains are fitted with fuse protection and
motor thermal protection.
Other faults in relation to the element, motor and
wiring should be identified using conventional fault
finding techniques.
In the event that electrical components are
replaced, please ensure that electrical safety
checks in accordance with the regulations in force
in the country of use are undertaken.
9.2 Electrical Heated Units
For the service engineer, please note that there is
a thermal cut-out incorporated in the air curtain
which needs to be manually reset. The cut-out is
located near to the mains terminal block.
Re-setting the thermal cut-out may help to identify
the nature of the fault however we do not
recommend
re-set
without
a
thorough
investigation into why the cut-out operated.
9.3 Electronic Controller
If the air curtain goes into thermal trip (overheat)
the Electronic panel keypad displays an ‘ERR’
code. Refer to air curtain instructions to remedy.
The electronic control base unit is protected from
any short circuit on the air sensor or heatsink
sensor as the short circuit will cause the
temperature to go high and trigger over
temperature alarm.
1:
Polarity: Use a multimeter to check correct
polarity between all three cores i.e. that +12V
goes to +12V, DATA goes to DATA, and GND to
GND.
2:
Continuity: Use a multimeter to check continuity
between each end of all three cores.
3:
Short circuit: Use a multimeter to check that
there are no short circuits between any of the
three cores.
N.B.
This test should be done with both ends of
the cable disconnected to avoid false readings.
4:
Plugs:
a)
Check that the correct length of insulation has
been stripped from each core.
b)
Check the tightness of the cables in the plugs.
9. Fault Finding
Figure 6. Thermal cut-out
Figure 7. Electronic controller
