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Spares Operation 08.01 A. B.
599 51 19 69 EN
4.2 Power supply / relay board
This board consists of a number of relays, a transformer (1) and other components, which are
necessary for the power supply of the relays and the control board.
The safety relay (2) is a power relay with 20 A contacts and serves the protection of the power
circuit. This board receives the electrical control impulses transferred by the control board, and,
according to the impulses received, the concerned heating element resp. ventilator is powered. The
secondary relay circulating air is a service resp. secondary relay with a lower amperage (3 A at the
contacts), which selects the circulation fan (3).
The control relays (4) (max. 16 A at the contacts) select the different heating elements resp. the
fan; their number changes depending on the type of appliance.
1
transformer for low voltage power supply
2
main switch-off relay (safety relay)
3
secondary relay, circulation fan
4
supply relay for heating element and hot-air fan (control relay)