F&F PF-431-LED TRMS Instruction Manual page 3

Prolonged operation with incorrectly connected neutral
wire can cause irreparable damage to the controller.
The device also monitors the voltage at the output contact,
which allows you to detect the „gluing" of the internal relay con-
tacts. If this situation is detected, all 3 LEDs will flash cyclically.
The protection works only when switching from a lo-
wer priority phase to a phase with a higher priority (for
example from L2 to L1). It does not work when switching
to a lower priority phase (for example from L1 to L2).
Mounting
1. Turn off the power.
2. Connect the input voltages to terminals 3, 4, 5 and the neutral
wire to terminal 6. The phase with the most variable parame-
ters should be connected to terminal 5, whereas the phase
with stabilized parameters to terminal 3 as the priority phase.
3. Connect the supplied single-phase circuit to terminal 10 (pha-
se) and the neutral wire of the network.
4. Turn on the power supply and check the continuity of power
supply of the connected single-phase circuit by successive vol-
tage disconnections in L1 and then L2 phases.
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