omi CHW 09 Manual De Uso Y Mantenimiento página 29

710.1760.00.01-00
No. Device Alarm
status code
HA
Pump, fan
and com-
4
pressor are
working
LA
P2
(*) A After fault rectification, system is automatically restored to standard setting – M Alarm function restored by settings
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
Alarm de- Possible cause
scription
Ambient temperature too
high
Dirty condenser
Fan is not working fine or
High liquid
the sense of rotation is not
temperature
correct
alarm
Required cooling capacity is
higher than nominal
Unit low on refrigerant
Air filter dirty (only for unity
with this kind of option)
Ambient temperature too
Low liquid tem-
low is decreasing liquid tem-
perature
perature
Sensor SA de- Probe can be defective or
fective not well connected
made on the control unit, procedure as described below.
or the display will show HAL (high temperature alarm)
or , the display shows HAL (high temperature alarm) or LAL (low
pressed
Recommended remedy
Decrease ambient tempera-
ture, increasing ventilation of
the room, removing heat
sources or repairing the unit
from the direct rays of sun
Clean the condenser as de-
scribed in maintenance
Check fuse of the fan (if pre-
sents), and right rotation
Decrease the required cooling
capacity
Check liquid sight glass (if pre-
sent) and in case contact ser-
vice
Dismount the filter from the
unit and clean it with air or
with water
The unit have to work in ambi-
ent condition as specified in
this manual
Check connection and in case
change probe
29
22/07/2009
Fault recti-
fication (*)
A