omi CHW 09 Bedienungs- Und Wartungsanleitung Seite 33

710.1760.00.03-00
No. Device Alarm
status code
B1LP
B2LP
Fans and
compres-
B1AC
sors are
2 B2AC
not work-
ing, pump
is working.
C1OP
........
C6OP
C1TR
........
C6TR
AP1
........
AP12
AEUN
Unit is
3
working AEP1
AEP2
C1MN
........
C6MN
Alarm de- Possible cause
scription
Unit low on refrigerant
Liquid flow too low
Refrigerant
low pressure
Percentage of anti-
alarm freeze too low or not
present, even for range
of temperature higher
than 5°C
Dirty evaporator
Percentage of anti-
freeze too low
Set point is too low for
actual system
Antifreeze
alarm
Liquid flow too low
Dirty evaporator
Compressor
oil-pressure Oil level in the com-
switch alarm pressor crank case is
or oil level too low.
alarm.
Thermal protections of
Compressor a new unit are in OFF
1, 2, 3, 4, 5, position
6 thermal
switches Compressor is having
alarm problem
One of the
Probe can be defective
probe is de-
or not well connected
fective
High liquid
temperature
alarm in inlet Required cooling capac-
line (if P3 or ity is higher than nomi-
P4 high temp. nal
alarm is pre-
sent)
Maintenance
Service on unit is re-
pumps 1, 2
quired due to length of
only on re-
work
quest
Maintenance
compressors Service on unit is re-
1, 2, 3, 4, 5, quired due to length of
6 only on re- work
quest
Recommended remedy
Check liquid sight glass
and in case contact ser-
vice
Check right rotation of
pump and possible ob-
struction on liquid circuit
Add antifreeze, or try to
increase temperature or
flow of liquid the combi-
nation of these three el-
ement can cause ice
problem
Clean evaporator and in
case contact service
Add antifreeze to the liq-
uid
If possible increase set
point, or check combina-
tion of flow, temperature
and antifreeze percentage
Check right rotation of
pump and possible ob-
struction on liquid circuit
Clean evaporator and in
case contact service
Fill the compressor crank
case with oil or contact
service
Switch MTC in ON
Reset thermal switch and
in case contact of a per-
sistent problem contact
service
Check connection and in
case change probe
Decrease the required
cooling capacity
Contact a refrigerant
technician
Contact a refrigerant
technician
33
25/05/2010
Restore (*)
A
becomes
M after 10
events in 1
hour
M
A
becomes
M after 1
events in 1
hour
M after re-
set MTC
A
A
becomes
M after 3
events in 1
hour
M
M