100
Alarm Reason Instruction Solution
LTO supply air
cold
(TE-05 min)
Heat exchanger trace has
broken
A green trace circles the heat exchanger.
Check if the trace can be seen from the LTO
cell review hole. If it cannot be seen, the trace
has broken.
Change the trace
The heat exchanger trace is
lubricated so that it can slide
A green trace circles the heat exchanger.
Check from the LTO trace review hole if the
pulley is rotating even though the LTO cell is
not rotating.
Change the trace
Exhaust blower has stopped Open the access door while the machine
is operating. The supply blower should be
rotating. In LTR model machines, press with a
screwdriver and check, if the blower starts.
Change blowers
Exhaust air lter is blocked Open the access door when the machine is
o. Pull out the lter and check the dirtiness
of the lter.
Change the exhaust lter
Exhaust air valves adjusted
wrong
Contact the company that installed the
ventilation unit and nd out if the air ow and
valves are correctly adjusted.
Contact the maintenance.
Ducts have inadequate
insulation
Check the thickness of insulation in supply
and exhaust ducts, and add insulation if
necessary.
Contact the maintenance.
The protection against
additional heating
overheating has launched.
Find out the cause for the failure and reset the
protection against overheating (® button in
the radiator).
Contact the maintenance.
The motor/gearbox in the
heat exchanger is faulty
Open the access door while the machine is
operating and listen, if the sound comes from
the LTO.
Contact the maintenance.
The LTO controller card is
faulty (EDA models)
The LTO cell is controlled by a separate
controller card that is located in the electric
box of the machine.
Contact the maintenance.
LTO pulley has separated
from the shaft
Check from LTO trace review hole if the shaft is
rotating empty and the pulley is in its place.
Tighten the screw on the pulley.
Contact the maintenance.
Supply air cold
(TE-10 min)
Heat exchanger trace has
broken
A green trace circles the heat exchanger.
Check if the trace can be seen from the LTO
cell review hole. If it cannot be seen, the trace
has broken.
Change the trace
The heat exchanger trace is
lubricated so that it can slide
A green trace circles the heat exchanger.
Check from the LTO trace review hole if the
pulley is rotating even though the LTO cell is
not rotating.
Change the trace
Exhaust blower has stopped Open the access door while the machine
is operating. The supply blower should be
rotating. In LTR model machines, press with a
screwdriver and check, if the blower starts.
Change blowers
Exhaust air lter is blocked Open the access door when the machine is
o. Pull out the lter and check the dirtiness
of the lter.
Change the exhaust lter
Exhaust air valves adjusted
wrong
Contact the company that installed the
ventilation unit and nd out if the air ow and
valves are correctly adjusted.
Contact the maintenance.
TROUBLESHOOTING
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