Biddle HR 25 - Remedying Errors that Are Not Accompanied by an Error Message

ERRORS HEAT RECOVERY UNIT
en-62
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5.6 Remedying errors that are not accompanied by an error mes-
sage
If you suspect an error but no error message is displayed:
1. Referring to the preceding sections, check whether yo
u
can easi
ly resolve the problem.
2. Try to resolve the problem using the table below. Techni-
cal expertise is required for this.
P
ROBLEM PROBABLE CAUSE WHAT TO DO
The unit does not respond
to the building management
system.
The building management system is not
operating correctly.
Check the building management sys-
tem.
The unit has no communication with
the building management system.
• Check the building man
agement
system.
•
Check the wiring.
The unit functions differently
from expectations.
The unit is operating in a special mode. • Check which mode the unit
is
operating in.
•
If necessary, set the unit for input
1
to onl
y emit a signal wi
thout
adjusting
the operation (r
egister
addr
ess 337 or b-touch menu 60.
Function of inputs).
One or more modules are not properly
connected.
• C
heck the connections of the
modu
les
• Check the operation of the
unit.
(See 2.13.4 Checkin
g operation
The unit is not circulating
enough air.
The filter(s) is/are dirty. Clean or replace filter(s).
The fan settings are not properly cali-
brated.
Calibrate the fan settings properly. see
2.13.5Calibrate air volume
The duct system is giving too much
resistance.
Resolve problems in the duct system:
• ducts too narrow
• bends too sharp
• blockages
An air damper is not working properly. Check the operation of the damper
(See 2.13.4 Checking operation).
The connected ventilation unit is not
working properly.
Check the operation of the connected
units.