Frico Thermozone SF E Series Original Instructions Manual page 11

GB
Service, repairs and maintenance
For all service, repair and maintenance first
carry out the following:
1. Disconnect the power supply.
2. The service hatch is opened by slackening
off the screws in the side of the unit.
Maintenance
Since fan motors and other components are
maintenance free, no maintenance other than
cleaning is necessary, this can vary depending
on local conditions. Undertake cleaning
at least twice a year. Grille, impeller and
elements can be vacuum cleaned or wiped
using a damp cloth. Avoid the use of strong
alkaline or acidic cleaning agents.
Overheating
The air curtain unit with electric heater is
equipped with an overheat protector. If it is
deployed due to overheating, reset as follows:
1. Disconnect the electricity with the isolating
switch.
2. Allow the electrical coil to cool.
3. Determine the cause of overheating and
rectify the fault.
4. Reconnect the power and start the unit.
All motors are equipped with an integral
thermal safety cut-out. This will operate,
stopping the air curtain should the motor
temperature rise too high. The cut-out
will automatically reset when the motor
temperature has returned to within the
motor's operating limits.
The air curtain is equipped with a post-
running thermostat who makes the fans blow
on middle speed until the electric coil is cold.
Fan replacement
1. Determine which of the fans is not
functioning.
2. Disconnect the cables to the relevant fan.
3. Remove the screws securing the fan and lift
the fan out.
4. Install the new fan in reverse order to the
above.
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SF E
Replacing the electric coil
1. Mark and disconnect the cables to the
electric coil.
2. Remove the mounting screws securing the
coil in the unit and lift the coil out.
3. Install the new coil in reverse order to the
above.
Trouble shooting
If the fans do not run, check the following:
1. Operating power supply to the unit;
check fuses, circuit-breaker, time switch/
thermostat (if any) that starts and stops the
unit.
2. That the air flow selector is correctly set.
3. That the position limit switch is working (if
installed).
4. That the intake grille is not dirty.
If there is no heat, check the following:
1. Power supply to electric heater coil; check
fuses and circuit-breaker (if any).
2. That the heat demand exists; check
thermostat settings and actual temperature.
3. That the output selector (if any) is set
correctly.
4. That the intake grille is not dirty.
If the fault cannot be rectified, please contact
a qualified service technician.
Residual current circuit breaker
(applies to units with electric heater)
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.
This should not be seen as a fault, but is
simply rectified by connecting the appliance
to the mains supply via a socket without a
safety cut-out, so that the moisture can be
eliminated from the element. The drying
time can vary from a few hours to a few days.
As a preventive measure, the unit should
occasionally be run for a short time when it is