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E
RRORS
5.6
Remedying errors that are not accompanied by an error mes-
sage
P
ROBLEM
The unit does not respond
to the building management
system.
The unit functions differently
from expectations.
The unit is not circulating
enough air.
en-62
If you suspect an error but no error message is displayed:
1. Referring to the preceding sections, check whether you
can easily resolve the problem.
2. Try to resolve the problem using the table below. Techni-
cal expertise is required for this.
P
ROBABLE CAUSE
The building management system is not
operating correctly.
The unit has no communication with
the building management system.
The unit is operating in a special mode.
One or more modules are not properly
connected.
The filter(s) is/are dirty.
The fan settings are not properly cali-
brated.
The duct system is giving too much
resistance.
An air damper is not working properly.
The connected ventilation unit is not
working properly.
H
EAT RECOVERY UNIT
W
HAT TO DO
Check the building management sys-
tem.
• Check the building management
system.
• Check the wiring.
• Check which mode the unit is
operating in.
• If necessary, set the unit for input 1
to only emit a signal without
adjusting the operation (register
address 337 or b-touch menu
Function of
inputs).
• Check the connections of the
modules
• Check the operation of the unit.
(See
2.13.4 Checking operation
Clean or replace filter(s).
Calibrate the fan settings properly. see
2.13.5Calibrate air volume
Resolve problems in the duct system:
• ducts too narrow
• bends too sharp
• blockages
Check the operation of the damper
(See
2.13.4 Checking
operation).
Check the operation of the connected
units.
60.
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