ACV ACVMax Touch, Installer'S Handbook, Page: 26 / 48

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Installer's Handbook (Evo) - 660Y3000 • A
EN
LIST OF STATUS LINE MESSAGES
Status Line Message Description
Standby Indicates that the appliance is ready to respond when a demand is received.
CH Demand A central heating call has been received.
DHW Demand A domestic hot water call has been received.
CH / DHW Demand
Central heating and domestic hot water calls are being received simultaneously. Both calls are being satisfied simultaneously because
domestic hot water priority has been disabled.
DHW Priority
Central heating and domestic hot water calls are being received simultaneously. Domestic hot water call is being satisfied first because it
has priority over central heating calls.
Priority Timeout
Central heating and domestic hot water calls are being received simultaneously. The domestic hot water priority time limit has been
exceeded. Priority will now switch back and forth between central heating and domestic hot water calls until one call is satisfied.
External Demand An external modulation call has been received.
Slave Operation The appliance is a slave in a cascade system (Not applicable for Evo appliances).
Manual Operation The burner or circulators have manually been enabled in the Installer Menu.
CH Burner Delay The burner will not fire until the call blocking time has elapsed.
DHW Burner Delay The burner will not fire until the call blocking time has elapsed.
CH Setpoint Reached
The burner is not fired because the supply/system water temperature exceeds the setpoint. The central heating circulator continues to
operate and the burner will fire again once the supply/system water temperature drops below the setpoint.
DHW Setpoint Reached
The burner is not fired because the supply/system water temperature exceeds the setpoint. The domestic circulator continues to operate
and the burner will fire again once the supply/system water temperature drops below the setpoint.
CH Post Pump The central heating circulator is running to remove heat from the appliance at the completion of a call.
DHW Post Pump The domestic hot water circulator is running to remove heat from the appliance at the completion of a call.
Freeze Protection Freeze protection will end once the supply/system water temperature is raised to 16ºC.
Boiler Protection
The burner firing rate is being reduced because of an excessive difference between the appliance supply and return temperatures. The firing
rate will begin increasing once the temperature difference is less than 25ºC.
Lockout Description The lockout which currently has the appliance shut down is displayed.
DESCRIPTION AND OPERATION