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The LED's on the electronic board display the operating status and any system blocks.
Key to LED's:
LED
COLOUR
LED STATUS
DL1
RED
OFF
FLASHING
DL1
RED
1 FLASH EVERY 3S
FLASHING
DL1
RED
FLASHING
DL1
RED
DL1
RED
ON
DL2
GREEN
OFF
DL2
GREEN
ON
DL2
GREEN
FLASHING 0.5S
DL2
GREEN
FLASHING 5S
DL3
GREEN
ON
DL4
GREEN
ON
DL5
GREEN
ON
DL6
GREEN
ON
DL7
GREEN
ON
DL8
RED
ON
DL9
GREEN
ON
DL10
GREEN
ON
DL11
GREEN
ON
DL12
RED
ON
DL12
RED
FLASHING
DL13
GREEN
ON
(*) Safety thermostat tripping
If the safety thermostat trips due to a fault in the adjustment system, the user module stops for safety reasons and the
red LED DL12 shines on the electronic board.
After checking the reason for the overheating, restart the system by pressing the safety thermostat reset device and mo-
mentarily disconnecting the power supply from the module (this operation is required in order to cancel the block from the
board memory: the red LED DL12 flashes).
In case this device trips repeatedly, contact the technical assistance service.
INSTALLATION AND OPERATING MANUAL
23. ELECTRONIC BOARD SIGNALS
OPERATING STATUS
NO ALARMS
EXTERNAL PROBE FAULTY
DOMESTIC HOT WATER PROBE FAULTY
HEATING PROBE FAULTY
ON/OFF VALVE NOT OPEN (Y1)
NO POWER
ZONE I HEAT DEMAND (MIXED)
POWER ON (AMBIENT THERMOSTAT NOT OPEN)
POWER ON (AMBIENT THERMOSTAT OPEN)
ZONE II PUMP FEED (HIGH TEMPERATURE)
ZONE 1 PUMP FEED (MIXED)
ON/OFF VALVE SERVOMOTOR POWER INPUT
DHW RECIRCULATION PUMP
ZONE II VALVE OPEN (Y4)
THREE-WAY VALVE IN DHW MODE (Y3)
THREE-WAY VALVE IN HEATING MODE (Y3)
DOMESTIC HOT WATER DEMAND
ON/OFF VALVE OPEN (AT TRAVEL STOP)
SAFETY THERMOSTAT TRIPPED (*)
AFTER SAFETY THERMOSTAT RESET (*)
ZONE II HEAT DEMAND
35
912.807.1 - GB
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