OMI CHW 09 Manuel D'utilisation Et D'entretien page 33

710.1760.00.02-03A
No. Device Alarm
status code
B1HP
B2HP or
C1HP
........
C6HP
B1PH
B2PH
B1LP
B2LP
Fans and
compres-
sors are
2
not work-
ing, pump
is working.
B1AC
B2AC
C1OP
........
C6OP
C1TR
........
C6TR
AP1 ........
AP12
AEUN
Unit is
3 AEP1
working
AEP2
C1MN
........
C6MN
(*) A After fault rectification system is automatically restored to standard setting
M Alarm function restored by settings made on the control unit, procedure as described below.
Alarm description
Required cooling capacity is
higher than nominal
Refrigerant high
pressure alarm Air filter dirty (only for units
with this kind of option)
Pump down alarm The pumping off operation
stops control cir- has exceeded the time lim-
cuit. it.
Unit low on refrigerant
Liquid flow too low
Refrigerant low
Percentage of antifreeze too
pressure alarm
low or not present, even for
range of temperature high-
er than 5°C
Dirty evaporator
Percentage of antifreeze too
low
Set point is too low for ac-
tual system
Antifreeze alarm
Liquid flow too low
Dirty evaporator
Compressor oil-
pressure switch Oil level in the compressor
alarm or oil level crank case is too low.
alarm.
Thermal protections of a
Compressor 1, 2, new unit are in OFF position
3, 4, 5, 6 thermal
Compressor is having prob-
switches alarm
lem
One of the probe is Probe can be defective or
defective not well connected
High liquid temper-
ature alarm in inlet
Required cooling capacity is
line (if P3 or P4
higher than nominal
high temp. alarm is
present)
Maintenance
Service on unit is required
pumps 1, 2 only on
due to length of work
request
Maintenance com-
pressors 1, 2, 3, 4, Service on unit is required
5, 6 only on re- due to length of work
quest
Possible cause
Decrease the required cooling
capacity
Dismount the filter from the
unit and clean it with air or
with water
contact service.
Check liquid sight glass and in
case contact service
Check right rotation of pump
and possible obstruction on
liquid circuit
Add antifreeze, or try to in-
crease temperature or flow of
liquid the combination of these
three element can cause ice
problem
Clean evaporator and in case
contact service
Add antifreeze to the liquid
If possible increase set point,
or check combination of flow,
temperature and antifreeze
percentage
Check right rotation of pump
and possible obstruction 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 persistent
problem contact service
Check connection and in case
change probe
Decrease the required cooling
capacity
Contact a refrigerant techni-
cian
Contact a refrigerant techni-
cian
33
Recommended remedy
26/11/2012
Restore (*)
A
becomes
M after 3
events in 1
hour
A
becomes
M after 10
events in 1
hour
M
A
becomes
M after 1
events in 1 h
M after reset
MTC
A
A
becomes
M after 3
events in 1
hour
M
M