Troubleshooting - Frico Sierra Original Instructions Manual

EN
Overheating
The air curtain unit with electrical heating is
equipped with an overheat protection. If it is
deployed due to overheating, reset as follows:
1. Disconnect the power supply with the isolator
switch.
2. Allow the electrical coil to cool.
3. Determine the cause of overheating and
rectify the fault.
4. Reconnect the unit.
Replacing heating elements/heating
package (E)
1. Mark and disconnect the cables to the
heating elements/package.
2. Remove the mounting screws securing the
heating elements/package in the unit and lift
the heating elements/package out.
3. Install the new heating elements/package in
reverse order to the above.
Replacing the water coil (W)
1. Shut off the water supply to the unit.
2. Disconnect the connections to the water coil.
3. Remove the mounting screws securing the
coil in the unit and lift out.
4. Install the new coil in reverse order to the
above.
Safety cut-out
All motors are equipped with an integrated
safety cut-out. This will operate, stopping the
air curtain should the motor temperature rise
excessively or the electronics fail or overheat.
The cut-out will automatically reset when the
motor temperature has returned to within the
motor's operating limits. Failure or damage to
electronics components may require repair or
replacement of such components or the entire
product.
Fan replacement
To access the fans, the L-shaped profile must
be removed by loosening its screws.
1. Determine which of the fans is not
functioning.
2. Disconnect the cables from the relevant fan.
3. Remove the screws securing the fan and lift
the fan out.
4. Install the new fan as above in reverse order.
20
Sierra
Replacing the PC board
1. The PC board is located in the terminal box.
2. Mark and disconnect the cables to the PC
board.
3. Unhatch the board from its PCB snap-in
spacers and lift out.
4. Install the new PC board as above in reverse
order.

Troubleshooting

If the fans are not running or do not perform
properly, check the following:
• The power supply.
• That the intake grille/filter is not dirty.
• That the motor's safety cut-out has not been
deployed.
• Functions and settings of the FC control
system, see the FC manual.
If there is no heat, check the following:
• Functions and settings of the FC control
system, see the FC manual.
For units with electrical heating, also check the
following:
• Power supply to electric heater coil; check
fuses and circuit-breaker (if any).
• That the overheat protection has not been
deployed.
For units with a water coil, also check the
following:
• That the water coil is air free.
• That there is sufficient water flow and
pressure.
• That incoming water is heated adequately.
If the fault cannot be rectified, please contact a
qualified service technician.
Residual current circuit breaker (E)
When the installation is protected by means of
a residual current circuit breaker, which trips
when the appliance is connected, this may be
due to moisture in the heating element. When
an appliance containing a heater element has
not been used for a long period or stored in
a damp environment, moisture can enter the
element.