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5
. . Errors
5.1
Resolving simple problems
P
ROBLEM
The unit does not work.
The unit functions differently
from expectations.
The unit is not circulating
enough air.
en-54
See also:
1.5
"Safety instructions" on page 12
d
w
If you suspect an error, first try to resolve the problem, using
the table below. You do not need to be an expert for this.
If this fails to resolve the problem, there may be a fault; in that
case, alert the installer.
P
ROBABLE CAUSE
The unit has not been switched on
The unit has no power supply.
The unit is operating in a special mode
One of the inlet sections and/or the
connected ventilation units is blocked.
See also:
2.11
"Connecting the unit to the mains supply" on page 25
Danger:
All work on the inside of the unit may only be
carried out by personnel who are technically
qualified to do so.
Warning:
Before you begin: read the safety instructions.
W
HAT TO DO
Turn the unit on
Check the mains supply:
• isolation switch;
• unit has power.
• Check which mode the unit is
operating in. (Register address
221)
Remove obstacles to the inlet and dis-
charge section.
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