Fault Finding; Electronic Controller; Smartelec2 Controller - Airbloc ACR Instruction Manual

8. Fault Finding.

8.1 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.
8.2 Electrically heated units only.
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
investigation into why the cut-out operated.
fig.10. Thermal cut-out

8.3 Electronic Controller.

If the air curtain goes into thermal trip (overheat)
the AC-ACR-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
temperature alarm.
without a thorough
high and trigger
fig.11 Electronic controller
8.4 SmartElec2 Controllers.
The SmartElec2 control raises an alarm if any of
its inputs are outside their normal working scope.
The alarms are displayed on the program panel
as an "alarm" code with a prefix " X ". See chart
over.
As the alarms are mutually exclusive, therefore
the first alarm code displayed on the program
panel will stay on until the fault has been cleared.
Apart from the communication failure alarm
[code X-- ], which could be due to a broken con-
nection of the data link, all other alarms will
cause the base unit to switch off the heater out-
put.
The SmartElec2 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.
There are four basic checks to perform should
'X--' appear on the program panel display. These
are as follows:
1: Continuity: Use a multimeter to check continu-
ity between each end of all four cores at the
plugs
2: Short circuit: Use a multimeter to check that
there are no short circuits between any of the
four cores.
N.B. This test should be done with both ends of
the cable disconnected to avoid false readings.
3: Plugs: Check that the plugs are firmly seated
on the circuit board pins in both the program
panel and on the base unit.
4: Addressing: (Network versions only). If two or
more air curtains are networked, check that each
base unit has a unique address as described in
section 10.4
5: Network cables: Ensure that the total run of all
over
cables in the network does not exceed 110m
36 including the cable to the program panel.