De-icing
Unit
Fault code
Category
Unit
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the positioning of
dampers, sensors, air directions, etc.)
xx yy
z
32 03
1
De-
Ice
De-icing activated be-
cause of icing
Information showing the unit running de-icing
32 04
1
Standby mode activa-
ted because of too
much icing
Information showing the unit is in hibernation mode be-
cause of too much icing
32 05
4
De-icing failed
Total number of restarts after hibernation set in Menu 7.4
is exceeded
● Check if outdoor air temperature is still too low. If so,
operation can only start again when the temperature
has risen
32 06
3
Illegal de-icing method
● Select correct de-icing method in accordance with
section "De-icing methods"
32 07
2
Bypass de-icing is de-
activated
iHCW: The return water temperature has fallen below the
warning temperature and the frost protection function is
active.
● Check that the hot water supply to the heating coil is
functioning
If the hot water supply is functioning, check if the motor
valve opens and the circulation pump is running.
● Check by turning the unit to "OFF" in the user menu
and force start the motor valve and any circulation
pump in specialist menu 8.3
The alarm resets automatically when the temperature
rises above the heat retention level
Damper
Unit
Fault code
Category
Unit
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the positioning of
dampers, sensors, air directions, etc.)
xx yy
z
33 01
2
Damper
BP1:
Bypass damper 1
faulty
BP1:
● Check the damper operates freely. Depress the re-
lease on the damper motor and rotate the damper.
● Go to forced start in menu 8.3 and force the closed
damper to open
3006401-2022-05-04
Alarms
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Summary of Contents for EXact2 HMI2-350-TOUCH
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