Circuit board diagnostics for Harvia FC/XW/XE heaters
These instructions are only intended for the electrician in charge of the electrical installation! All service operations must be done by professional maintenance personnel.
400V 3N~ 3-phase installation
Control for electric heating (P)
In addition to supply connectors, the heaters are equipped with a connector (P), which makes the control of the electric heating possible. Voltage control is transmitted from the heater when it is switched on. The control cable for electrical heating is brought directly into the junction box of the heater, and from there to the terminal block of the heater along a rubber cable with the same cross-section area as that of the connecting cable.
How to identify a circuit board?
The circuit board model is marked on the sticker with the letters WX___.
Original manufacturer part number: WX683
Spare part number: SP683
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NOTE
These instructions are only intended for the electrician in charge of the electrical installation! The heater may only be connected to the electrical network in accordance with the current regulations by an authorized, professional electrician.
All service operations must be done by professional maintenance personnel.