ATREA DUPLEX RA5 - 7. Faults and Troubleshooting; 7.1 Troubleshooting Guide

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7. Faults and troubleshooting
7.1 Faults and troubleshooting
Fault
Description
Possible cause
Troubleshooting
The unit cannot be
started
• The unit remains idle
even after the required
performance level was
selected
• Power supply is not connected
• Connect the unit to power supply
(switch on upstream safety circuit
breakers)
• The unit’s operation is being blocked
by the external input “operation
allowed“ (e.g. from the fire damper
etc.)
• Check and contact a service technician
if necessary
• Not found
•
Disconnect from power supply and
contact a service technician
The unit is not
supplying enough air
• The unit is providing a
significantly lower
volume of air
• Clogged filters
• Disconnect the unit from power
supply
• Replace the filter mat or cassette
• When the unit has been in operation for
more than approx.4 years, clean the
heat recovery exchanger / exchangers
•
A mechanical obstacle at fresh air
intake or supply air outlet points
•
Check whether the fresh air intake
openings or supply air outlets are not
mechanically covered
• Remove any obstacles
• Visually and by listening check whether
the dampers open properly
• Not found
•
Disconnect from power supply
and
contact a service technician
The unit is not
heating or is heating
insufficiently
• After selecting the
required temperature
level the supply air is
still cold
• The actual air
temperature does not
reach the required
level
• The electric heater is not connected to
the power supply
• Connect the unit to the power supply
(switch on upstream safety circuit
breakers)
• Electric heater thermal protection
response
• Wait. If the fault does not disappear on
its own within approx. one hour, press
the RESET button on the electric
heater.
• If this does not remove the fault, or if the
fault appears repeatedly, contact a
service technician.
• Low maximum capacity of the heater
• Does not constitute a fault (insufficient
capacity designed)
• Not found
• Disconnect from power supply and
contact a service technician
• When the heater has
been started, supply
air continues to be
cold
• The choke valve actuator is not
working, is still in one position
• Check it the HS (heating season) period
is set; if yes, contact a service
technician.
•
Air in the hot-water air heater
•
Check heating water temperature
•
Bleed air from the system
• Heating water temperature in the
heater too low
• Check heating water temperature
• Heating water flow rate too low
• Check the condition of the sludge filter
at the heating water inlet; clean the filter
• Low maximum capacity of the heater
• Does not constitute a fault (insufficient
capacity designed)
•
Not found
•
Disconnect from power supply and
contact a service technician
Water dripping from
the unit
• Water drops form
between the door and
frame when the unit is
running
• The condensate drain line trap is not
sufficiently primed with water
• Disconnect the unit from power
supply and prime the condensate drain
line trap with water
• The condensate drain line is clogged
•
Disconnect the unit from power
supply and clean the condensate drain
line including the trap
• The seal is compromised (the issue
can be accompanied by a whistling
sound caused by air flowing through
the leak point)
• Disconnect the unit from power
supply and replace the seal
• Water drops form at
the condensate drain
connection point
• The condensate drain seal or line is
damaged
• Disconnect the unit from power
supply and reseal the condensate drain
• Not found
•
Disconnect from power supply
and
contact a service technician