Potterton Gold 4 kW Installation And Servicing Instructions page 23

FIGURE EIGHTEEN: SUPPLY LED OFF
ALARM TRIPS INSTANTLY ON POWER UP.
BOTH CALL AND ALARM LEDS ARE RED
IS THE
BOILER HOT
NO
IS CONN 3
OPEN CIRCUIT
NO
FIGURE NINETEEN: ALARM ONE
SUPPLY LED OFF
IS THE
NO
MAIN SUPPLY
AVAILABLE
YES
IS THERE
NO
230V ON TVR 1
MAIN PCB
YES
IS THERE
NO
8V DC ON
C1 MAIN PCB
YES
YES IS THE
PUMP RUNNING
NO
IS THE
PUMP NEON
ILLUMINATED
NO
YES
CHECK 240V IS SUPPLIED
TO THE MAIN POWER TERMINAL
CONN5
CHECK FOR SHORT CIRCUITS
ON WIRING TO THE PUMP.
IF OK REPLACE FS1 FUSE.
T 2A 240V 20 x 5mm
REPLACE THE MAIN POWER PCB
REPLACE THE CONTROL PCB
RUN SYSTEM WITH ALARM TO
YES
ALLOW PUMP TO COOL SYSTEM
BEFORE RESETING
YES CHECK SERVICE VALVES ARE
FULLY OPEN.
CHECK AND REPLACE PUMP.
CHANGE CONTROL PCB
CHECK AND REPLACE THE
TEMPERATURE SWITCH CONN 3
THERE IS NO WATER IN THE
SYSTEM. SWITCH OFF IMMEDIATELY.
CHECK AND REFILL BEFORE
RESTARTING.
23