Hitachi YUTAKI S80 Series - Page 129

10. Electrical wiring
TCGB0075 rev.0 - 11/2012
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Led indications
PCB1
Name Color Indication
LED1 Green Pump operation
LED2 Green System heater or boiler operation
LED3 Green DHW tank’s heater operation
LED4 Red Heat pump operation (thermo ON/OFF)
LED5 Yellow Operation: indicates power supply to the unit
LED6 Red Alarm (ickering with 1 sec interval)
LED7 - Not used
LED8 Yellow H-link indication transmission
PCB3
Name Color Indication
LED1 Green Power supply indication
LED2 - Not used
LED3 - Not used
LED4 Red Heat pump operation (compressor 2)
LED5 Yellow Alarm (ickering with 1 sec interval)
LED6 - Not used
LED7 - Not used
LED8 Yellow H-link indication transmission