4 . F A U L T S , E R R O R S A N D T R O U B L E S H O O T I N G; Description Of Fault Messages And Their Causes - BPC DUPLEX 250 Easy Use, Maintenance And Installation Manual

4 . F a u l t s , e r r o r s a n d t r o u b l e s h o o t i n g

Description of fault messages and their causes

4.1.
Fault
The equipment

cannot be started
The equipment is

not supplying
enough air
The equipment is

not heating or is
heating
insufficiently
Water is dripping

from the
equipment

Description
The equipment  Power supply is not connected
remains idle even
after the required
performance level
 Not found
was selected
The equipment is  Blocked filter
providing a
significantly lower
volume of air
 A mechanical obstacle at fresh
air suction or supply air outlets
Not found

When the heater  The electric heater is not
has been started, connected to power supply
supply air
continues to be
cold
 Response of the electric
heater's heat protection
Low maximum capacity of the

heater
Not found

Water droplets  The condensate drain siphon is
form between the insufficiently flooded
door and body of
the equipment
 The condensate drain is blocked
during operation
with dirt
 The seal groove is damaged
(the fault can be accompanied
by a whistling sound caused by
air flowing through the gap)
Water droplets The condensate drain seal or

form at the line is damaged
condensate drain
connection point
 Not found
Possible cause
13
Troubleshooting
 Connect the equipment to power
supply (switch on upstream
safety circuit breakers)
Disconnect from power

supply and contact a service
technician
 Disconnect the equipment
from power supply
 Replace the filter cloth or
cassette
If the equipment has been in

operation for more than approx.
4 years, clean the heat recovery
exchanger/s
 Check whether the suction
openings of fresh air or supply
air outlets are not mechanically
covered
 Remove any obstacles
 Visually and by listening check
whether the dampers open
properly
Disconnect from power

supply and contact a service
technician
 Connect the equipment to power
supply (switch on upstream
safety circuit breakers) – can
only be done by an authorized
person
 Wait to see if the fault does not
sort itself out after approx. 1
hour
Does not constitute a fault

(insufficient capacity designed)
Disconnect from power

supply and contact a service
technician
Disconnect the equipment

from power supply and flood
the condensate drain siphon
 Disconnect the equipment
from power supply and clean
the condensate drain including
the siphon
 Disconnect the equipment
from power supply and replace
the seal
Disconnect the equipment

from power supply and re-seal
the condensate drain
 Disconnect from power
supply and contact a service
technician