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
56
Temperature of the air
supplied to the room was
too high.
Temperature of the air supplied to
the room was too high.
Signalling of alarm, the
HRU is stopped
Continuously from the
moment of recording the
cause
Overheating of the electric
reheater
–
triple activation
of the thermostat.
Temperature in the electric
reheater is too high
–
triple
activation of the thermostat. Air
flow too low, the heater thermostat
may require alarm
acknowledgement.
Signalling of alarm,
electric heater cyclic
alarm procedure
Continuously from the
moment of recording the
cause
General inspection by the
technical service of the
manufacturer is required
General inspection required
–
contact the technical service of the
manufacturer.
Signalling of alarm, no
display of energy
recovery
Every 7 days after the
cause has been recorded
Periodic inspection
approaching.
Periodic inspection approaching
–
contact the technical service of the
manufacturer.
Signalling of alarm
Every other day, after
the cause has been
recorded
Unauthorised start-up
–
unit disabled
Unauthorised attempt to configure
the device
Signalling of alarm, the
HRU is stopped and
disabled
Continuously from the
moment of recording the
cause
Overheating of the electric
primary air heater
–
triple
activation of the
thermostat.
Temperature in the electric primary
air heater is high
–
triple activation
of the thermostat. Air flow too low,
the heater thermostat may require
alarm acknowledgement
Signalling of alarm,
electric heater cyclic
alarm procedure
Continuously from the
moment of recording the
cause
Possible overheating of the
pre-heater.
The tripping of the overheating
thermostat, which may need to be
reset, has been noted.
Signalling of alarm,
electric heater alarm
procedure
Continuously after
recording the cause, then
the alarm disappears
Possible overheating of the
reheater.
The tripping of the overheating
thermostat, which may need to be
reset, has been noted.
Signalling of alarm,
electric heater alarm
procedure
Continuously after
recording the cause, then
the alarm disappears
The supply air
temperature is too low.
Temperature of the air supplied to
the room is too low.
Signalling of alarm, the
HRU is stopped
Continuously from the
moment of recording the
cause
Low temperature in the
water reheater
–
the
heating procedure is
started
Temperature on the sensor
downstream of the exchanger
below the threshold (default: 5°C)
or activation of the water reheater
thermostat.
Alarm signalling,
heating procedure
Continuously after
recording the cause, then
the alarm disappears
Activation of the water
primary air heater
thermostat
–
initiation of
the heating process
Activation of the water primary air
heater thermostat.
Alarm signalling,
heating procedure
Continuously after
recording the cause, then
the alarm disappears
The date of replacement of
anti-fouling filters is
approaching
The date of replacement of anti-
fouling filters is approaching
Signalling of alarm.
Filter replacement by
the maintenance
department and reset of
the working time
counter.
A decrease in air quality
has been detected.
Too much air pollution in the room.
Signalling of alarm,
further operation of the
controller
Continuously after
recording the cause, then
the alarm disappears
No communication with
the controller.
The transmission wire connecting
the panel with the controller may
be damaged.
Signalling of alarm,
further operation of the
HRU.
Continuously from the
moment of recording the
cause
No confirmation of supply
or exhaust air fan
operation.
Supply or exhaust fan may be
damaged.
Signalling of alarm, the
HRU is stopped.
Continuously from the
moment of recording the
cause
