Temperature Control; Troubleshooting - Frico Pamir 2500 Original Instructions Manual

vary depending on local conditions. Undertake
cleaning at least twice a year. Inlet and exhaust
grilles, impeller and elements can be vacuum
cleaned or wiped using a damp cloth. Use a
brush when vacuuming to prevent damaging
sensitive parts. Avoid the use of strong alkaline
or acidic cleaning agents.

Temperature control

Temperature control of FC maintains the
exhaust temperature. Should the temperature
exceed the preset value, the overheating alarm
will activate. For more information see the FC
manual.
Overheating
Unit with electrical heating
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. Determine the cause of overheating and
rectify the fault.
3. Remove the front hatch.
4. Press the red button located inside the air
curtain unit, at the inner gable of the terminal
box.
5. Reattach the front hatch and connect the unit
again.
All units
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.
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 heaging elements/package out.
3. Install the new heating elements/package in
reverse order to the above.
Pamir 2500
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.
Draining the water coil (W)
The drain valve is on the underside of the coil
on the connector side. It can be accessed via
the front hatch.
Replacing motor or impeller
1. Remove the front.
2. Remove gable end.
3. Remove the screw between motor and fan.
4. Disconnect the cables to the motor.
5. Remove the screws securing the motor and
lift it out together with the impeller.
6. Install the new motor and/or the new
impeller as above in reverse order.
Replacing the PC board
1. The PC board is located in the terminal box.
Fig. 2
2. Mark and disconnect the cables to the PC
board.
3. Remove the screws securing the board 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.
EN
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