Solar Compatability - Worcester Greenstar Heatslave II External 12/18 Instruction Manual

FAULT FINDING
& DIAGNOSIS

Solar compatability

Normal operation: the tank will cool more slowly for the same DHW performance if the DCW is above normal DCW temperature,
1
thus saving fuel.
Solar tank hot: therefore the burner will not be required at high DHW flow rate and the tank will boost the solar heated water if the
2
temperature drops.
Solar tank will satisfy the DHW requirements: therefore the appliance allows the water to pass straight through without taking any
3
action apart from monitoring the temperatures. To utilise the solar panels to their maximum potential, the solar tank thermostat
will need to be set high and the Heatslave II DHW setting low.
Solar tank overheat: DCW above solar tank limit, appliance will not operate pump or burner and fault code will be displayed within
4
the service menu.
l
1
DCW in less than
40°C
l
2
DCW in more than
40°C (but less
than 3 below)
(for 2 sec or more)
During a DHW demand
(DHW flow >2 l/min
l
3
DCW in greater than tank setpoint
minus (no demands offset + 2°C)
(for 2 seconds or more)
l
4
DCW in 80°C or
more (for 2
seconds or more)
Normal DHW
operation
Burner OFF for
DHW 10 l/min &
above (burn
allowed for tank
reheat during
demand)
Burner OFF, pump OFF
DCW in less than tank
(any tank reheat demand
setpoint minus (no
suppressed until after
demands offset + 3°C)
DHW demand ends)
Burner OFF, pump OFF DCW in below
Fault code 380 displayed
79°C (for 2 sec
within service menu (i1) or more)