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KOMFORT EC U(E) 330-(2)
Remove the screws and take off the protecting cover.
Support the control unit panel with hand while removing the screws that
fix the swivel panel of the control unit. After that release the service panel to
enable access to the control unit.
After maintenance perform all the operations reverse.
TROUBLESHOOTING AND FAULT HANDLING
In case of alarm the unit is turned off and the wall-mounted display shows the alarm indicators, fig. 11. The possible alarms are listed in the table 5.
The alarms must be removed ONLY in a service centre or by a service expert, duly authorized for unassisted operations at the units up to 1000V after careful
reading of the operation manual.
Freeze protection sensor
drop-off indicator
Duct temperature sensor
drop-off indicator
Temperature
sensor failure
Overheating
of heating elements
ALARM
INDICATION
REMEDY
Overheating of the heating elements
Overheating of the heating elements. Reset the thermal switches in the unit manually.
Temperature sensors failure
Short circuit of one or two temperature sensors. Remove the short circuit.
Temperature sensor dropping off
Remove the temperature sensor drop-off.
Freeze protection sensor dropping off
Remove the freeze protection sensor drop-off.
Fig. 11. Alarm indication on the wall-mounted control panel
Table 5. Unit alarm list
KOMFORT EC UE330 v2(3)_EN.indd 16
10.08.2015 11:27:59
