Initialization; Display Messages; Checking Gas Inlet Pressure; Measuring The Inlet Pressure - Worcester Greenstar Highflow 440CDi ERP Installation, Commissioning And Servicing Instructions

COMMISSIONING
▶ Turn the temperature control [10] to maximum. The burner on
indicator [13] illuminates green when the burner has lit.
The boiler runs for 15 minutes at minimum heating
output to fill the condensate trap. This occurs every time
the mains supply has been interrupted.
13
3 4
5
2
1 6
max
10
Fig. 36 Operating the boiler
▶ If the boiler fails to light, the blue power indicator [9] and reset
button [5] will flash alternately.
▶ To reset the boiler, press and hold the reset button [5] for 2 seconds.
3 4
5
2
1 6
max
Fig. 37 Boiler reset
CAUTION: DO NOT PRESS THE POWER INDICATOR [9]
TO RESET THE BOILER.
5.4.2

Initialization

The appliance performs a self test at initial switch on that takes
approximately 10 seconds.
During the test, the display shows
The Service engineer and the Service menu
orange and the Reset button lights up red.
Afterwards the display shows the Central heating temperature.
On successful completion of the test sequence the appliance is ready for
operation.
5.4.3

Display messages

Special messages Description
Key acknowledgement after pressing one
button (except reset button)
Key acknowledgement after pressing two
buttons simultaneously
Table 14 Special display messages
28
2
1 1
3
0 bar 4
reset
eco
3 4
e
2
1 6
min max
2
1 1 3
0 bar 4
reset
eco
5
3 4
e
2
1 6
min max
9
for the first two seconds.
buttons light up
Special messages Description
Key acknowledgement after
pressing button
(save function)
The display shows alternatively the CH flow
temperature and
continuously at the minimum power
(see Engineer's Service manual - function 2.F).
The display shows alternatively the CH flow
temperature and
continuously at the maximum power
(see Engineer's Service manual - function 2.F).
Appliance is in Air purge mode,
(see Engineer's Service manual - function 2.C.
The display shows alternatively the CH flow
temperature and
programme is active.
(see Engineer's Service manual - function 4.F
The display shows alternatively the CH flow
temperature and
service is due. The burner service interval of
2324 hours has run out.
(see Engineer's Service manual - function 5.F.
The display shows alternatively the CH flow
temperature and
See error E9.
The display shows alternatively the CH flow
temperature and
is active. The primary temperature is rising too
fast and the burner has switched off for 2
minutes. See error E9.
When the control is in internal heat bank
demand the display will alternate between the
primary temperature and the tank demand
symbol.
Table 14 Special display messages
5.5

Checking gas inlet pressure

5.5.1

Measuring the inlet pressure

The inlet pressure to the appliance must be checked using the following
procedure:
1
Fig. 38 Inlet test point
▶ Close the gas isolation valve.
▶ Slacken the screw in the inlet pressure test point [1] and connect a
manometer.
▶ Open the gas isolation valve.
Greenstar Highflow CDi
longer than 3 seconds
. The appliance works
. The appliance works
. The Syphon-fill
reminding that the next
. The pump is blocked.
. The gradient limitation
ErP - 6720818077 (2016/04)