Fire hazard! For fire prevention reasons, a device for shutting down the defrost heating in the event
of excessive temperature (e.g. “KLIXON”) must be planned during the planning of the installation.
Relay 7 Relay 6 Relay 5 Relay 4 Relay 3 Relay 2 Relay 1
Controller type 73, 74 63, 64 53, 54 43, 44 35, 36..38 25, 26, 28 15, 16, 18
SPIR410 Evaporator fan Condenser fan - Defrost Enable compressor 1 - Alarm
SPIR290 Evaporator fan Compressor 3 Compressor 2 Compressor 4 Enable compressor 1..4 Compressor 1 Alarm
If any relay output is activated by the controller, the associated green LED lights; for details see
chapter .Status LEDs, page 47
7.4 Assignment of the 230 V AC digital inputs
Warning about dangerous electrical voltage!
Danger of electric shock! BEFORE connecting and disconnecting, it must be checkedthat no voltage
at the 230 V AC digital inputs!is present
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