Operation and Maintenance Manual, OnyX Sky Heat Recovery Units, 2022/01
Frapol Sp. z o.o. reserves the right to introduce changes without any prior notice.
Page
55
Interface of the
FraNET
app with sample settings. The mobile
FraNET
app can be downloaded free of charge.
8.13
Alarms
NOTE
The operation in the emergency operating status is only permitted under the supervision of the user until the
maintenance crew arrives and the fault is rectified. If user supervision is not possible, the controller should
be disconnected from the power supply.
Alarm
Possible cause
Effect of alarm
Display
Supply air temperature
sensor is defective
The sensor has been damaged,
wrongly connected or has not been
configured. The method of sensor
inspection has been described in
Sec. 5.6.7
Signalling of alarm, the
HRU is stopped
Continuously from the
moment of recording the
cause, then the alarm
disappears
The temperature sensor
downstream of the heat
exchanger is defective
Exhaust vent temperature
sensor is defective
Room air temperature
sensor is defective
Air intake temperature
sensor is defective
GHE temperature sensor is
defective.
The sensor has been damaged,
wrongly connected or has not been
configured.
Signalling of alarm
Continuously from the
moment of recording the
cause, then the alarm
disappears
SAP alarm
–
the HRU has
been stopped due to an
external signal.
SAP alarm
–
the HRU has been
stopped due to an external signal.
Signalling of alarm, SAP
operating procedure
Continuously after
recording the cause, then
the alarm disappears
The filter may be soiled
–
the filter life has expired,
call the service centre to
have the filters replaced.
The filter may be soiled
–
call the
service centre to have the filters
replaced.
Signalling of alarm, no
display of energy
recovery
Until the installer has
entered a new inspection