Heat recovery unit RDAF - Technical manual
10
FläktGroup DC_9349GB_20190326_R4
We reserve the right to make changes without prior notice
OVERHEATING PROTECTION, TEMPERATURE ALARM, ROTOR ALARM, OTHER ALARMS
THERMAL OVERLOAD PROTECTION
The fan motors are equipped with thermal overload protection devices,
which are reset manually by briefly disconnecting the power.
The electric heaters have two thermal overload protection devices, one
automatic and one manual. The automatic overheating protection trips
before the manual one, which means it does not normally need to be
reset.
If the manual overheating protection for the electric heater has tripped
during operation, first the power to the unit should be switched off and
then the overheating protection should be reset by pressing the reset
button.
If the manual overheating protection trips again, call qualified service
personnel.
TEMPERATURE ALARM
Generates an alarm and stops operation if the supply air temperature
drops below +5 °C. The alarm is disabled during defrosting. A 10-min-
ute delay ensures that the supply air temperature has time to rise if
operation has been stopped.
ROTOR ALARM
If the rotor motor stops and the Tacho signal disappears, five attempts
will be made to restart the rotor (start/stop). If this does not solve the
problem, the unit will stop and the rotor alarm will be indicated.
OTHER ALARMS
The unit has various other alarms, which are shown in plain text in the
ISYteq Touch 3.5 control panel. If the alarm recurs after being cleared,
call service personnel for assistance.
