Resetting
Fuse (EP15-FC1) is accessible behind the front cover.
The miniature circuit breakers are reset by pushing back
to the fused position.
Caution
Check the miniature circuit-breakers. They may
have tripped during transportation.
CABLE LOCK
Use a suitable tool to release/lock cables in the heat
pump terminal blocks.
Connections
NOTE
To prevent interference, unscreened commu-
nication and/or sensor cables to external con-
nections must not be laid closer than 20 cm
from high voltage cables.
POWER CONNECTION
F1355 must be installed with a disconnect option on the
supply cable. Minimum cable area must be sized accord-
ing to the fuse rating used. Supplied cable for incoming
supply electricity is connected to terminal block X1. All
installation must be carried out in accordance with cur-
rent norms and directives.
NOTE
It is important that the electrical connection is
made with the correct phase sequence. With
the incorrect phase sequence, the compressor
does not start and an alarm is displayed.
TARIFF CONTROL
If the voltage to the compressors disappears for a given
period, simultaneous blocking of these must take place
via software controlled input (AUX input) to avoid alarm,
see page 23.
At the same time, external operating voltage for the
control system must be connected to F1355, see section
"Connecting external operating voltage for the control
system".
NIBE F1355Chapter 5 | Electrical connections22
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