omi CHW 09 Bedienungs- Und Wartungsanleitung Seite 29

710.1760.00.03-00
Pump is
not work-
ing, fan
2 and com-
pressor
are work-
ing
Pump, fan
and com-
3 pressor LA2
are not
working
HA
Pump, fan
and com-
4 pressor
are work-
ing
LA
P2
(*) A After fault rectification, system is automatically restored to standard setting – M Alarm function restored by settings made on
HOW TO VISUALIZE A WARNING/ALARM EVENT (CONTROLLER TYPE "A")
CONTROLLER Type "A"
(CHW 11 to CHW 28; CHG 08)
The LED warning alarm on ((!)) shows that an alarm is taking place.
To see which kind of alarm, the max temperature (minimum) and the length, act as follow:
1) Press one of the two buttons
or LAL (low temperature alarm) followed by Max. temperature (minimum), "tiM" will then
appear (tiMe), followed by the "length" in h.mm.
2) At this point the instrument will show the temperature again
Note: the length defines the partial length in case the alarm is still on
HOW TO RESET AN ALARM EVENT
1) Press the button
temperature alarm).
2) Keep button
3) The display shows: rST, which after 2 sec starts lightening, to show that the values have
been cancelled
The gear of the pump is
blocked by dusty or
corrosion
Pump is
blocked
The motor of the pump
is internally protected
Antifreeze
Liquid flow too low
alarm
Ambient temperature
too high
Dirty condenser
Fan is not working fine
High liquid
or the sense of rotation
temperature
is not correct
alarm
Required cooling capac-
ity is higher than nomi-
nal
Unit low on refrigerant
Air filter dirty (only for
unity with this kind of
option)
Ambient temperature
Low liquid
too low is decreasing
temperature
liquid temperature
Sensor SA de- Probe can be defective
fective or not well connected
the control unit, procedure as described below.
or
or , the display shows HAL (high temperature alarm) or LAL (low
pressed
Try to move the axe of
the pump and after that
switch on again
Switch off the unit for one
hour and try again after
check the axe is not
blocked and there are no
liquid obstruction
Check no. 2 for pump
problem
Decrease ambient tem-
perature, increasing ven-
tilation of the room, re-
moving heat sources or
repairing the unit from
the direct rays of sun
Clean the condenser as
described in maintenance
Check fuse of the fan (if
presents), and right rota-
tion
Decrease the required
cooling capacity
Check liquid sight glass (if
present) and in case con-
tact service
Dismount the filter from
the unit and clean it with
air or with water
The unit have to work in
ambient condition as
specified in this manual
Check connection and in
case change probe
the display will show HAL (high temperature alarm)
29
25/05/2010
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