21
Operating and maintenance instructions for the ventilation unit
TROUBLESHOOTING
Alarm
Reason
Instruction
Solution
HRW supply air
cold
(TE-05 min)
Heat exchanger belt is
broken
A green belt drives the heat exchanger. Check
if the belt can be seen from the HRW round
opening. If it cannot be seen, the belt is
broken.
Change the belt.
The heat exchanger belt is
oily and slips
A green belt drives the heat exchanger. Check
from the HRW round opening if the pulley is
rotating even though the HRW rotor is not.
Change the belt.
Extract air fan has stopped
Open the service hatch. Press the safety switch
with a screwdriver and check, if the fan starts.
Contact Service.
Change the fan.
Extract air filter is blocked
Open the service hatch when the unit is off.
Pull out the filter and check the condition of
the filter.
Change the filters.
Extract air valves adjusted
incorrectly
Find out if the air flow and valves are correctly
adjusted.
Contact the installer.
Ducts have inadequate
insulation
Check the thickness of the insulation in supply
and extract air ducts, and add insulation if
necessary.
Contact the installer.
The pre-heater overheating
protection has tripped.
Find out the cause for the failure and reset the
protection against overheating (R® button in
the radiator).
Contact service.
The motor/gearbox in the
heat exchanger is faulty
Open the service hatch while the unit is
operating and listen, if the sound comes from
the HRW.
Contact service.
The HRW controller circuit
board is faulty
The HRW motor is controlled by a separate
circuit board that is located in the electric box
of the unit.
Contact service.
HRW pulley has separated
from the shaft
Check from the HRW round opening if the
shaft is rotating empty and the pulley is in its
place.
Contact service.
Tighten the screw on the pulley.
TE-05 temperature sensor
is faulty
Check from the measurements menu on the
control panel if the supply air temperature
after heat recovery measurement is off the
charts.
Contact service.
Supply air cold
(TE-10 min)
Heat exchanger belt is
broken
A green belt drives the heat exchanger. Check
if the belt can be seen from the HRW round
opening. If it cannot be seen, the belt is
broken.
Change the belt
The heat exchanger belt is
oily and slips
A green belt drives the heat exchanger. Check
from the HRW round opening if the pulley is
rotating even though the HRW rotor is not.
Change the belt
Extract air fan has stopped
Open the service hatch. Press the safety switch
with a screwdriver and check, if the fan starts.
Contact Service.
Change the fan
Extract air filter is blocked
Open the access door when the unit is off. Pull
out the filter and check the condition of the
filter.
Change the filters
Extract air valves adjusted
incorrectly
Find out if the air flow and valves are correctly
adjusted.
Contact the installer.
The pre-heater overheating
protection has tripped.
Find out the cause for the failure and reset the
protection against overheating (R® button in
the radiator).
Contact service.
TE-10 temperature sensor
is faulty
Check from the measurements menu on the
control panel if the supply air temperature
measurement is off the charts.
Contact service.
The motor/gearbox in the
HRW motor is faulty
Open the service hatch while the unit is
operating and listen, if the sound comes from
the HRW.
Contact service.
Summary of Contents for Svea eAir
Page 1: ...Operating and maintenance instructions for the ventilation unit Svea eAir...
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