Alarm list
Alarm codes are given as a result of a fault or when important information should be provided to the
user.
Alarms fall into the following categories:
C Critical:
Running or partially stopped as long as the alarm is active.
W Warning:
Becomes critical if the situation is not improved within a reasonable period.
I Informative:
Normal operation not affected. The alarm will disappear when the user cancels it.
Alarm code
Category
Display text
Description / cause
Fault correction
0
--
--
No alarm
1
C
HARDWARE
Fault in control system hardware
Contact service if cancellation
does not help
2
C
TIMEOUT
Warning alarm (W) has become a
critical alarm
Note alarm and reset.
Contact service if alarm does not
disappear
3
C
FIRE
Fire thermostat. Units stopped
because fire thermostat is active
If there has been no fire, contact
service
4
C
PRESSO
High pressure switch in the cooling
circuit has been triggered,
probably caused by:
- Extreme hot
- Cloaked filter
- Defective fan
Check for errors and reset alarms.
If you are unable to reset the
alarm or if the alarm occurs often
please contact service.
6
C
DEFROST
The unit is defrosting. The frost
protection of the heat recovery
system is insufficient and the unit
will stop.
This can be caused by extreme low
outdoor temperatures.
Contact service if reset does not
help.
Note the actual sensor
temperatures from the menu
“Show data” to help service.
8
C
T
x
SHORT
One of the temperature sensors in
the unit is short circuit or defect.
Note which sensor, T
x
, has
shortcircuited, e.g. T1 short and
contact service
9
C
T
x
OPEN
One of the temperature sensors
has been disrupted or is faulty
Note which sensor, T
x
, has been
disrupted, e.g. T1 disrupt and
contact service
10
C
OVERHEAT
Electrical heater overheated.
Insufficient air flow due to e.g.
blocked filters, blocked air intake
or faulty intake fan
Check air is being blown into the
home.
Check filter and air intake.
Reset alarm.
Contact service if the above does
not help
11
C
AIRFLOW
Insufficient airflow at intake.
See alarm code 10
See alarm code 10
15
W
ROOM LOW
When the room temperature is
under 10°C the unit will stop to
avoid further cooling. This can be
for a period when the house is
unoccupied and the heating is
switched off.
Heat up the house and reset alarm
Combi 302 Polar Top (English)
BY NILAN
9
