Potterton Gold 4 kW Installation And Servicing Instructions page 18

THEN WAIT FOR 1 - 1.5 MINUTES
SWITCH OFF PRE-HEAT, POWER
FIGURE FOURTEEN: OPERATION OF THE C SERIES ISSUE 5 BOILER
18
MAIN POWER ON
IS TEMP
SWITCH OPEN
I.E. FAULTY OR
BOILER OVER
TEMP
NO
CONTINUE CHECK FOR ALL AS
LONG AS BOILER IS POWERED
RUN TO ON
PUMP ON AND PRE-HEAT ON
DO BOTH
THERMISTOR BEADS
READ SAME VALUE I.E.
TEMPERATURE
YES
CONTINUE CHECK FOR A
FURTHER 2 MINUTES
UP AND MODULATE BOILER
RUN TO OFF
BOILER POWERS DOWN
IS WATER IN
BOILER BELOW
70ºC/75ºC
YES
YES
CALL LED RED
ALARM LED FLASHING
NO ALARM LED FLASHING
(NO WATER OR INSUFFICIENT
WATER FLOW)
NO
KEEP PUMP RUNNING
OR PUMP ON
PUMP OFF