Maxwell MXW 1500 A, Instruction Manual

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FAILURES AND SOLUTIONS
More than 95% of the complaints are submitted during the start of operation of the equipment and are due to
installations errors.
More than 90% of the failures are solved only by checking the connections. Following the three following points, we
can make sure that the installation is correct:
A) Telephone cable is been manipulated: The cable that connects the controller to the air curtain is an 8 lines crossed
telephone cable. If manipulated (cut or removing the connector) and incorrectly joined, the air curtain won't
work. Moreover, it can damage the electronics. If the connector is joined wrong side, we can solve the problem only
by turning it (connections diagram of first page).
B) Wrong connection of the telephone cable. Verify whether the connector position is correct (between control or
auxiliary according to the installation diagram, specially if there is more than one air curtain with a single controller.
C) Wrong current supply / input. The air curtain input depends on the type of current that is available and also on the
heating type of the unit. Connect the unit according to the diagram on the first page.
Common problems and solutions
Effect Problem Solution
All lights of the
controller are OFF ¿Is the telephone cable the
original (not manipulated), with
no enlargements either
shortenings? Change the cable or connect it again correctly.
¿Does the current reaches de
connection box? Connect the terminals of the junction box correctly:
Between L and N there must be 230V and if the air curtain
goes with a three-phase electrical element, there must be
400V among the terminals L1,L2 y L3.
¿Is the controller connected to
the “Control” of the PCBoard? Connect the cable from the controller to the “Control”,
never to the “Aux”.
¿Is the fuse of the PCBoard in
good conditions? Check the fuse and replace it in case it is necessary (Type
T, slow action).
Some lights of the
controller are
flashing
The green LED of the
maximum speed flashes when
we stop the air curtain after
having been operating with
heating
It is not an error but a safety mechanism. The air curtain
turns on by itself to the maximum speed to get cold and
protect its components. When the temperature decreases
from the safety one, it will stop.
Some speed or heating lights
are flashing when the air
curtain is working.
It is a protection mechanism of the air curtain so that the
internal parts of the air curtain do not suffer damages.
Situations on which the problem continuously recurs and
the way to solve/avoid it:
1. Inlet grille blocked (objects, dirtiness…) the ambient
temperature inside the equipment can increase a loti f the
air cannot circulate properly. Keep the grille clean.
2. Small room: We recommend installing a thermostat to
control the heating power so the protection device do not
activates.
3. In case that the ambient temperature is already high,
we recommend to lower the power heating or install a
thermostat.
4. Inlet air already warm, that comes from other heating
equipment beyond the air curtain. Move the air curtain
away, place a thermostat in the inlet part of the curtain or
lower the heating power.
5. Any motor does not work: inform the technical service.
The heating is not
working ¿Does the three-phase current
reach the connection box? Check installation
The speed and/or
the heat change
continuously with
no apparent
reason but the
lights of the
controller are not
flashing. Probably the telephone cable
is near interference sources,
transmitters, cable plates,
specially those that supply
current to the Motors, etc..
Pass the cable the furthest possible away from the
interference source, specially when long distances or use
a screened cable.