Ch Function Chart - Worcester Greenstar Heatslave II ErP 12/18 Installation, Commissioning And Servicing Instruction Manual

8.6

CH function chart

NO DEMAND
Appliance
(system standby )
Mains power
Blue light OFF
supply ON
[203]
Anti fast cycle delay (10 minut es
from CH demand end) [202 only
displayed if a new CH demand is
Fig. 91
Numbers in square brackets are the cause code of the
current appliance operation, visible in the service menu
slot 1 (i1),
Key
3WV 3 way valve (diverter valve).
CH set point The target flow temperature set on the CH
fascia control knob.
CH adaptive offset The learnt offset temperature applied to the
CH flow so that the peak flow temperature
after burner OFF = CH set point.
Anti fast cycle delay To stop the appliance short cycling if a room
stat is intermittently calling or is poorly
positioned, there is a 10 minute delay for CH
demands timed from the last CH demand end.
Greenstar Heatslave II ErP - 6 720 813 344 (2014/09)
230V on CH LR AND
fascia mounted
programmer CH = CH
ON (if fitted) DEMAND
(and no current [200]
DHW/ Heatslave tank
demand)
Pump OFF
3WV to DHW
[200]
started]
Flow temp peaks:
CH adaptive offset
adjusted
Blue light ON
Pump
Radiator symbol on
ON
display and 3WV to CH
[200]
[200]
Pump overrun ON Blue light OFF
(3 minutes from Burner OFF Radiator
burner OFF) symbol off display
[200] [200]
Fault finding and diagnosis
Flow at more than
Burner
CH setpoint minus
OFF
CH adaptive setpoint
[200]
[200]
[200]
Flow temp less than
Burner
CH setpoint minus
ON
10°C
[200]
[200]
End of CH DEMAND
(room stat AND/ OR
programmer CH OFF)
[200] 6 720 805 209-71.1TL
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