SYX66x Commissioning Guide
V1.10.3 300117
Page 37 of 61
Pump Required
– Indicates the controller’s requirement for the heating pump. This indicator will be Yellow if running
only due to an outside frost condition.
VT Pump Override
– The user can force the pump On or Off if required. The Hand LED will illuminate on the controller
facia. After an override is used it should be left in Auto and the hand LED will turn off.
VT Pump - This indicates the current status of the VT Pump
– Green means running.
HWS Priority
– If the pump has been disabled to give priority to the HWS then this indicator will be Active during the
override period (30 mins).
VT Valve Open
– Indicates the output status for opening the valve
VT Valve Close
– Indicates the output status for closing the valve
HWS Priority - If the VT Valve has been closed to give priority to the HWS then this indicator will be Active during the
override period (30 mins).
Engineer Mode Status
– This will flash to inform all users that the Engineer Mode is active. This should not be the case
unless under engineer request.
